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How can i get the textbox value in selected row in gridview

I am working on a project in c# asp.net.
I created a gridview and connected it to a database. My code is like that;
<asp:GridView ID="GridView1" runat="server"
class="table table-bordered table table-hover " AutoGenerateColumns="false" HeaderStyle-Height="40px" OnRowCommand="GridView1_RowCommand1" >
<Columns>
<asp:TemplateField HeaderText="Numune Parçası" >
<ItemTemplate>
<asp:Literal ID="Literal22" runat="server" Text='<%# Eval("Açıklama") %>'></asp:Literal>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Analiz">
<ItemTemplate>
<asp:Literal ID="Literal112" runat="server" Text='<%# Eval("Analiz") %>'></asp:Literal>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Tartım" ItemStyle-Width="10%">
<ItemTemplate>
<asp:TextBox id="txttartim" runat="server" class="form-control" ></asp:TextBox>
</ItemTemplate>
<ItemStyle Width="10%"></ItemStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Birim">
<ItemTemplate>
<asp:DropDownList ID="birimlist" class="form-control" runat="server" >
<asp:ListItem>g</asp:ListItem>
<asp:ListItem>mg</asp:ListItem>
<asp:ListItem>ml</asp:ListItem>
<asp:ListItem>cm2</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Kaydet">
<ItemTemplate>
<asp:LinkButton ID="Btn_Indir" runat="server"
class="btn btn-primary btn-sm" Text="Kaydet" CommandName="Open" CommandArgument='<%# Eval("ID") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<HeaderStyle BackColor="#D14124" CssClass="gridheader" ForeColor="White" HorizontalAlign="Left" />
</asp:GridView>
And the code behind is like that
protected void GridView1_RowCommand1(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Open")
{
int RowIndex = ((GridViewRow)((LinkButton)e.CommandSource).NamingContainer).RowIndex;
string name = ((TextBox)GridView1.Rows[RowIndex].FindControl("txttartim")).Text;
DropDownList bir = (DropDownList)GridView1.Rows[RowIndex].FindControl("birimlist");
string birim = bir.SelectedItem.Value;
}
}
But my problem is that i can not get the value of textbox and dropdownlist in which selected row.
The strings name and birim is null.

Give this a go:
if (e.CommandName == "Open")
{
GridViewRow selectedRow = ((GridViewRow)((LinkButton)e.CommandSource).NamingContainer);
string name = ((TextBox)selectedRow.FindControl("txttartim")).Text;
DropDownList bir = (DropDownList)selectedRow.FindControl("birimlist");
string birim = bir.SelectedItem.Value;
}

Ok, I often just drop in a plane jane asp.net button, and I don't bother with using the GV built in commands (such as command).
However, you have a command, so you can trigger the "row" command as you have.
And the "row command" fires before the selected index fires, and in fact fires before the selected index triggers.
I note that you passing the "ID". It not really necessary, since a GV has what is called DataKeys feature. That feature lets you get the row (database) PK id, but REALLY nice is you don't have to expose, show, or even use a hidden field, or anything else to get that data key. (this is great for several reasons - one being that you don't have to hide or shove away, or even use the command argument to get that database PK row. The other HUGE issue is then your database pk values are NEVER exposed client side - so nice for security).
Ok, So, make sure your row event is being triggered, and you should be able to use this, first the markup for the Linkbutton:
<asp:TemplateField HeaderText="View" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:LinkButton ID="cmdView" runat="server" Text="View" CommandName="Open" cssclass="btn btn-info" />
</ItemTemplate>
</asp:TemplateField>
Note how I do NOT worry or pass the "ID". As noted, datakeys takes care of this, and in the GV def, we have this:
<asp:GridView ID="GVHotels" runat="server" class="table"
AutoGenerateColumns="false" DataKeyNames="ID"
bla bla bla
So, now our code is this:
protected void GVHotels_RowCommand(object sender, GridViewCommandEventArgs e)
{
LinkButton lBtn = e.CommandSource as LinkButton;
GridViewRow gRow = lBtn.NamingContainer as GridViewRow;
int PKID = (int)GVHotels.DataKeys[gRow.RowIndex]["ID"];
Debug.Print("Row index click = " + gRow.RowIndex);
Debug.Print("Database PK id = " + PKID);
// get combo box for this row
DropDownList cbo = gRow.FindControl("cboRating") as DropDownList;
Debug.Print("Combo box value = " + cbo.SelectedItem.Value);
Debug.Print("Combo box Text = " + cbo.SelectedItem.Text);
Output:
Row index click = 7
Database PK id = 68
Combo box value = 2
Combo box Text = Good
So, use datakeys - you thus DO NOT have have to put in extra attributes here and there and everywhere to get the PK row value.
In fact, really, using row command is often MORE of a pain, and you can DUMP the command name to trigger that button click. And REALLY nice then is you get a separate nice command "code stub" for each button (or link button) in the GV. (no need to try and shove all that code into the row command, and then a bunch of if/then or "case" statements to run code for a given command.
So, I in fact suggest you use this:
<asp:TemplateField HeaderText="View" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:LinkButton ID="cmdView" runat="server" Text="View"
OnClick="cmdView_Click1" cssclass="btn btn-info" />
</ItemTemplate>
</asp:TemplateField>
So, all we did was add a plane jane good old regular click event. It will not fire row command, and in fact will not trigger "selected index changed" for the GV, but in most cases I don't need them. So, now, if you 2 or 5 buttons, you just think of them as plane jane regular buttons. (just type in onclick in teh markup, and choose "create new event" that intel-sense pops up). So, now our code for the button is seperate, and not part of the row command. Our code thus becomes this:
protected void cmdView_Click1(object sender, EventArgs e)
{
LinkButton lBtn = sender as LinkButton;
GridViewRow gRow = lBtn.NamingContainer as GridViewRow;
int PKID = (int)GVHotels.DataKeys[gRow.RowIndex]["ID"];
Debug.Print("Row index click = " + gRow.RowIndex);
Debug.Print("Database PK id = " + PKID);
// get combo box for this row
DropDownList cbo = gRow.FindControl("cboRating") as DropDownList;
Debug.Print("Combo box value = " + cbo.SelectedItem.Value);
Debug.Print("Combo box Text = " + cbo.SelectedItem.Text);
}
So, I tend to not bother with row command - better to just have that plane jane click event. Note the use of naming container - but the rest of the code is the same. I would ONLY use "commandName" to trigger the row event, since THEN the gv index changed event fires - and that useful for highlighting the whole row - but if you don't care, then don't even bother with CommandName - just use regular click events, and as noted, this is even better, since then each button gets it 100% own nice little code stub like any other button click tends to have.
So I grabbed a dropdownlist but your code could be say this:
TextBox tBox = gRow.FindControl("txttartim") as TextBox;
debug.Print (tBox.Text);

I solve the problem.
When i write the code in the Page_load section, it works! It is not null anymore.
if (!Page.IsPostBack)
{
load();
..
}

Access HyperLink inside ItemTemplate inside TemplateField ASP.Net WebForms

I have an ASP TemplateField inside a data populated GridView as follows:
<asp:GridView ID="gvReport" runat="server" AutoGenerateColumns="False" ShowHeaderWhenEmpty="true" OnRowDataBound="gvReport_RowDataBound" CssClass="table table-bordered">
<Columns>
<asp:BoundField DataField="Delete" HeaderText="Delete" SortExpression="Delete" />
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:HyperLink runat="server" NavigateUrl='<%# "Edit?from=Delete&ID=" + Eval("ID") %>' ImageUrl="Assets/SmallDelete.png" SortExpression="PathToFile" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
In other words, at the end of each row, there is a delete 'button'. I can tell whether a particular row/record has been deleted by checking the true/false value of the BoundField Delete in my code behind as follows:
if (e.Row.RowType == DataControlRowType.DataRow)
{
TableCell statusCell = e.Row.Cells[0];
if (statusCell.Text == "True")
{
//change ImageUrl of Hyperlink for this row
}
}
Right now, my icon is red for delete, but in the case that a record has already been deleted,
I would like to change the image to a different icon (a blue one).
How can I change this ImageUrl if statusCell evaluates to true?

ok, so we will need two parts here:
We need (want) to persist the data table that drives the grid).
The REASON for this?
We kill about 3 birds with one stone.
We use the data table store/save/know the deleted state
We use that delete information to toggle our image
(and thus don't have to store the state in the grid view).
We ALSO then case use that table state to update the database in ONE shot, and thus don't have to code out a bunch of database operations (delete rows). We just send the table back to the database.
In fact in this example, I can add about 7 lines of code, and if you tab around, edit the data? It ALSO will be sent back to the database. And this means no messy edit templates and all that jazz (which is panful anyway).
Ok, so, here is our grid - just some hotels - and our delete button with image:
markup:
<div style="width:40%;margin-left:20px">
<asp:GridView ID="GridView1" runat="server"
AutoGenerateColumns="False"
DataKeyNames="ID" CssClass="table table-hover borderhide" >
<Columns>
<asp:TemplateField HeaderText="HotelName" >
<ItemTemplate><asp:TextBox id="HotelName" runat="server" Text='<%# Eval("HotelName") %>' /></ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="FirstName" SortExpression="ORDER BY FirstName" >
<ItemTemplate><asp:TextBox id="FirstName" runat="server" Text='<%# Eval("FirstName") %>' /></ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="LastName" >
<ItemTemplate><asp:TextBox id="LastName" runat="server" Text='<%# Eval("LastName") %>' /></ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="City" >
<ItemTemplate><asp:TextBox id="City" runat="server" Text='<%# Eval("City") %>' /></ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:ImageButton ID="cmdDelete" runat="server" Height="20px" Style="margin-left:10px"
ImageUrl="~/Content/cknosel.png"
Width="24px" OnClick="cmdDelete_Click"></asp:ImageButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<br />
<asp:Button ID="cmdDeleteAll" runat="server" Text="Delete selected" Width="122px"
OnClientClick="return confirm('Delete all selected?')" />
</div>
Ok, and the code to load up the grid - NOTE WE persist the data table!!!!!
Code:
DataTable rstTable = new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
LoadGrid();
else
rstTable = (DataTable)ViewState["rstTable"];
}
void LoadGrid()
{
// load up our grid
using (SqlCommand cmdSQL = new SqlCommand("SELECT * from tblHotels ORDER BY HotelName ",
new SqlConnection(Properties.Settings.Default.TEST4)))
{
cmdSQL.Connection.Open();
rstTable.Clear();
rstTable.Load(cmdSQL.ExecuteReader());
GridView1.DataSource = rstTable;
GridView1.DataBind();
}
ViewState["rstTable"] = rstTable;
}
Ok, so far, real plain jane. The result is this:
Ok, so now all we need is to add the delete button click event.
That code looks like this:
protected void cmdDelete_Click(object sender, ImageClickEventArgs e)
{
ImageButton btn = (ImageButton)sender;
GridViewRow rRow = (GridViewRow)btn.Parent.Parent;
DataRow OneRow = rstTable.Rows[rRow.DataItemIndex];
// toggle data
if (OneRow.RowState == DataRowState.Deleted)
{
// undelete
OneRow.RejectChanges();
btn.ImageUrl = "/Content/cknosel.png";
}
else
{
// delete
OneRow.Delete();
btn.ImageUrl = "/Content/ckdelete.png";
}
}
Again, really simple. But NOTE how we use the data table row state (deleted or not).
And this ALSO toggles the image for the delete button.
So, we don't have to care, worry, or store/save the sate in the grid.
So, if I click on a few rows to delete, I now get this:
So far - very little code!!!
Ok, so now the last part. the overall delete selected button. Well, since that is dangerous - note how I tossed in a OnClientClick event to "confirm the delete. if you hit cancel, then of course the server side event does not run.
But, as noted since we persisted the table? Then we can send the table deletes right back to the server without a loop. The delete code thus looks like this:
protected void cmdDeleteAll_Click(object sender, EventArgs e)
{
// send updates (deletes) back to database.
using (SqlCommand cmdSQL = new SqlCommand("SELECT * from tblHotels WHERE ID = 0",
new SqlConnection(Properties.Settings.Default.TEST4)))
{
cmdSQL.Connection.Open();
SqlDataAdapter daUpdate = new SqlDataAdapter(cmdSQL);
SqlCommandBuilder daUpdateBuild = new SqlCommandBuilder(daUpdate);
daUpdate.Update(rstTable);
}
LoadGrid(); // refesh display
}
So, note how easy it is to update (delete) from the database. If you look close, I used text boxes for that grid - not labels. The reason of course is that if the user tabs around in the grid (and edits - very much like excel), then I can with a few extra lines of code send those changes back to the database. In fact the above delete button code will be 100% identical here (it will send table changes back with the above code. So, if we add rows, edit rows then the above is NOT really a delete command, but is in fact our save edits/deletes/adds command!

ASP.NET Web Forms: How to reference CheckBoxList items as 'selected' on a table on another page using only C# and ASP.NET web forms?

Assignment Instructions:
Develop a simple shopping cart application that uses session objects to store the information. You will have to create an ASP.NET project that contains two web forms. The first web form, ShoppingCart.aspx, allows the user to select items using a set of checkboxes. This page shows also the number of items in the cart.
The second web form, Display.aspx, displays the number of selected items in a table and allows the user to go back to the first web form and continue shopping.
I am using a CheckBoxList to list my products, and I built a table with IDs in the cells to receive the data the user checks off.
(I considered the idea of using CheckBox vs. CheckBoxList, but this would not be the appropriate solution and doesn't easily allow counting total items selected)
I have tried using cookies and session state variables, but I can't figure out how to associate them to the table.
I can transfer test data from labels and textboxes, anything with an ID, but not my CheckBoxList items.
How do I reference which checkboxes are selected on page 1, that will update the desired table cells on page 2, after clicking the 'checkout' button without unique IDs on the list items?
Example: If... 1lb Dark Roast is selected on page 1 ...
(identified as 'p001' for product 1 on next page)
<asp:ListItem Value="15.99">1lb Dark Roast</asp:ListItem>
On page 2 (Display.aspx) the Amount column should update to '1' beside that product
<asp:TableCell ID="p001_amt" runat="server"></asp:TableCell>
If an item is checked on page 1, this should be the result... (along with the other products).
Product
Price
Amount
1lb dark Roast
$15.99
1
1lb Med Roast
$15.99
0
1 = checked, 0 = unchecked (assignment desired outcome shows this table)
Any help would be appreciated. Thanks.
Here are snippets from my code, if more is needed I can add a link to the full pages.
Page 1 (ShoppingCart.aspx)
ShoppingCart.aspx
------------------
<asp:Label ID="TotalCart_lbl" runat="server" Text="Total Items in your Cart: "></asp:Label>
<br />
<asp:CheckBoxList ID="Shop_ckbx" runat="server">
<asp:ListItem Value="15.99">1lb Dark Roast</asp:ListItem>
<asp:ListItem Value="15.99">1lb Medium Roast</asp:ListItem>
<asp:ListItem Value="12.99">1lb Decaf Roast</asp:ListItem>
<asp:ListItem Value="16.99">1lb Cold Brew</asp:ListItem>
<asp:ListItem Value="10.99">1 box Tea</asp:ListItem>
<asp:ListItem Value="35.99">French Press</asp:ListItem>
<asp:ListItem Value="8.99">CCM Mug</asp:ListItem>
</asp:CheckBoxList>
<br />
<asp:Button ID="UpdateCart_btn" runat="server" Text="Update Your cart" OnClick="UpdateCart_btn_Click"/>
<br />
<asp:Label ID="Contents_lbl" runat="server" Text="Update To See Cart Contents"></asp:Label>
<br />
<asp:Label ID="Cost_lbl" runat="server" Text="Total: "></asp:Label>
<br />
<asp:Button ID="Checkout_btn" runat="server" PostBackUrl="~/Display.aspx" Text="Go to Checkout" />
ShoppingCart.aspx.cs
---------------------
protected void UpdateCart_btn_Click(object sender, EventArgs e)
{
int total = 0; //Total item count
Contents_lbl.Text = "Your Cart Contains: <br/>- - - - - - - - - - - - - - - -";
foreach (ListItem listItem in Shop_ckbx.Items)
{
if (listItem.Selected == true)
{
//Add Text to label
Contents_lbl.Text += "<br/>&#8226 " + listItem.Text;
//Count Items in Cart
total += 1;
}
}
Contents_lbl.Text += "<br/>";
for (int i = 0; i < Shop_ckbx.Items.Count; i++)
{
if (Shop_ckbx.Items[i].Selected)
{
cost += Convert.ToDouble(Shop_ckbx.Items[i].Value);
Cost_lbl.Text = "Total: $ " + cost.ToString();
}
}
//Update total items
TotalCart_lbl.Text = "Total Items in Your Cart: " + total;
}
protected void Checkout_btn_Click(object sender, EventArgs e)
{
How do I reference the items in the checklist on page 1
to update the table on page 2 without unique IDs on each list item?
}
Page 2 code (Display.aspx)
Display.aspx
------------------
<asp:Table ID="Display_tbl" runat="server">
<asp:TableRow runat="server" ID="Header_row" Font-Bold="True" Font-Size="Larger" BackColor="#FFCC99">
<asp:TableCell ID="Product_cell" runat="server" Width="250">Product</asp:TableCell>
<asp:TableCell ID="Price_cell" runat="server" Width="100">Price</asp:TableCell>
<asp:TableCell ID="Amount_cell" runat="server" Width="100">Amount</asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p001">
<asp:TableCell ID="p001_prod" runat="server">1lb Dark Roast</asp:TableCell>
<asp:TableCell ID="p001_price" runat="server">$ 15.99</asp:TableCell>
<asp:TableCell ID="p001_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p002" Width="500px">
<asp:TableCell ID="p002_prod" runat="server">1lb Med Roast</asp:TableCell>
<asp:TableCell ID="p002_price" runat="server">$ 15.99</asp:TableCell>
<asp:TableCell ID="p002_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p003">
<asp:TableCell ID="p003_prod" runat="server">1lb Decaf</asp:TableCell>
<asp:TableCell ID="p003_price" runat="server">$ 12.99</asp:TableCell>
<asp:TableCell ID="p003_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p004">
<asp:TableCell ID="p004_prod" runat="server">1lb Cold Brew</asp:TableCell>
<asp:TableCell ID="p004_price" runat="server">$ 16.99</asp:TableCell>
<asp:TableCell ID="p004_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p005">
<asp:TableCell ID="p005_prod" runat="server">1 box Tea (50 bags)</asp:TableCell>
<asp:TableCell ID="p005_price" runat="server">$ 10.99</asp:TableCell>
<asp:TableCell ID="p005_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p006">
<asp:TableCell ID="p006_prod" runat="server">French Press</asp:TableCell>
<asp:TableCell ID="p006_price" runat="server">$ 35.99</asp:TableCell>
<asp:TableCell ID="p006_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="p007">
<asp:TableCell ID="p007_prod" runat="server">CCM Coffee Mug</asp:TableCell>
<asp:TableCell ID="p007_price" runat="server">$ 8.99</asp:TableCell>
<asp:TableCell ID="p007_amt" runat="server"></asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server" ID="Total_row">
<asp:TableCell ID="Total_prod" runat="server">Total</asp:TableCell>
<asp:TableCell ID="Total_price" runat="server"></asp:TableCell>
<asp:TableCell ID="Total_amt" runat="server"></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:LinkButton ID="Back_linkbtn" runat="server" OnClick="Back_linkbtn_Click">Go Back to the Shop</asp:LinkButton>
Display.aspx.cs
-------------------
protected void Page_Load(object sender, EventArgs e)
{
ShoppingCart prevPage = PreviousPage as ShoppingCart;
if (prevPage != null)
{
NOT SURE HOW TO LINK TO MY CHECKLIST ITEMS
TO UPDATE 'AMOUNT' TABLE CELLS
Also,
CHECKBOXES ON PREVIOUS PAGE NEED TO STAY SELECTED
in order to CONTINUE SHOPPING.
}
}
protected void Back_linkbtn_Click(object sender, EventArgs e)
{
Response.Redirect("ShoppingCart.aspx");
}

Ok, so the problem we have here is of course matching up the “thing” you selected on one page, and then figuring this out on the next web page.
To be fair, the problem here is that no doubt you have to "make up" the data here. And that REALLY hurts this whole process, since you having to type in the data two times (once on this page, and then on the target page). Worse, you have to match up by "text". One little space, period etc. and your whole system will fall down.
I going to suggest we NOT worry and NOT have to match up the values. We can in one shot get rid of a HUGE problem, and ALSO reduce the markup, the code and all your life hassles (well, ok, just the coding part - can't fix everything!!!).
So, I going to suggest that in place of the check box "list", we create a table and use that for BOTH pages. This will then not only keep us out of rooms with padded walls, but we can deal with a "row" of something that you select, and just not give one hoot as to the spelling or even what we place in that row. And by doing this, you could with almost no code changes change the "list" from our table to a database - and the whole she-bang would work!!
So, lets use (create) a table, and not only is this easy, but I think far more clean to setup our data.
So, we will have this at the start of the page (a table and some total values for the WHOLE page class.
public class MyFirstOrderPage : System.Web.UI.Page
{
private DataTable MyTable = new DataTable();
private decimal MyTotal = 0;
private int MyTotalQty = 0;
Ok, now lets do the sub in this page to load up the above table.
public void CreateData()
{
MyTable.Columns.Add("Product", typeof(string));
MyTable.Columns.Add("Price", typeof(decimal));
MyTable.Columns.Add("Qty", typeof(int));
MyTable.Columns.Add("Amount", typeof(decimal));
MyTable.Columns.Add("Purchased", typeof(bool));
MyTable.Rows.Add({"11b Dark Roast",15.99,1,0,false});
MyTable.Rows.Add({"11b Medium Roast",15.99,1,0,false});
MyTable.Rows.Add({"1b Decaf Roast",12.99,1,0,false});
MyTable.Rows.Add({"11b Cold Brew",16.99,1,0,false});
MyTable.Rows.Add({"1 box Tea Brew",10.99,1,0,false});
MyTable.Rows.Add({"French Press",35.99,1,0,false});
MyTable.Rows.Add({"CCM Mug",8.99,1,0,false});
}
Now not only can you "easy" read the above, but you can change/view and see the columns and then the data follows - so you can see we decided to have a Qty and also a column for the purchased. this will save BUCKETS of code, and BUCKETS of markup. And we can use the above to BOTH pages - no having to have two copies of this list!!!!
Ok, so now we have our table. next up, lets display that table. And we can use VERY much the same grid in our order page as we can in the check out page (saves even more time, more code and even MORE markup!!!).
So, lets use a gridview. We could use a listview and I would consider that if you wanted a cute picture and some more product description. But, gridview is fine.
So, here is the markup for the gridview:
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" ShowFooter="true"
Font-Bold="True" Font-Size="Larger" BackColor="#FFCC99" AutoGenerateColumns="False">
<Columns>
<asp:BoundField DataField="Product" HeaderText="Product" Headerstyle-width="250px" />
<asp:BoundField DataField="Price" DataFormatString="{0:C2}" HeaderText="Price" Headerstyle-width="80px" />
<asp:TemplateField HeaderText="Qty" >
<ItemTemplate>
<asp:TextBox ID="Qty" runat="server" Width="60px"
Text ='<%# Eval("Qty") %>'
MyRow = '<%# Container.DataItemIndex %>'
AutoPostBack="true" OnTextChanged="Qty_TextChanged"
/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Amount">
<ItemTemplate>
<asp:TextBox ID="Amount" runat="server" width="80px"
Text ='<%# FormatCurrency(Eval("Qty") * Eval("Price")) %>' Enabled="false" DataFormatString="{0:C2}" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Purchase" ItemStyle-HorizontalAlign="Center">
<ItemTemplate >
<asp:CheckBox ID="CheckBox1" runat="server" width="110px"
Checked ='<%# Eval("Purchased") %>'
MyRow = '<%# Container.DataItemIndex %>'
AutoPostBack="true"
OnCheckedChanged="CheckBox1_CheckedChanged1"
/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
</asp:GridView>
<asp:HiddenField ID="qtycheck" runat="server" ClientIDMode="Static" />
<br />
<asp:Button ID="Checkout_btn" runat="server" Text="Proceed to Checkout"
style="width:140px;height:60px;background-color:#FFCC99;border-radius:25px"
OnClientClick="hasorder();return false;"/>
<script>
function hasorder() {
var CheckQty = document.getElementById("qtycheck")
if (CheckQty.value > 0) {
window.location.href = "/CheckOut.aspx"
}
else {
alert("Please select at least one Purchase before proceding to check out");
return false;
}
}
</script>
Now that is a bit of markup, but it is STILL much less then say your 2nd page table, and better you see how our 2nd page now is VERY little markup!!
Ok, so we have the above. The only real issue is that when you check a box, we need to total things up. And when you edit or change the qty, then SAME thing - update the totals.
So, the code we have for each part is again rather limited. I'll post in all in one shot:
protected void Page_Load(object sender, System.EventArgs e)
{
if (System.Web.UI.Page.IsPostBack == false)
{
// ok first page load, now check if reutrn from checkout
if (System.Web.UI.Page.Session["MyTable"] == null)
{
CreateData(); // first time here - create the data
System.Web.UI.Page.Session["MyTable"] = MyTable; // save the data table
}
else
// we have data - (so this is user change of mind from checkout page)
MyTable = System.Web.UI.Page.Session["MyTable"];
// ok, now load our data into the grid
LoadData(); // load the data
}
else
// this is a post back due to general changes and selections for this
// page under normal and mutliple operations and choices by the user.
// we dont' need to re-display the grid - it persists automatic
// however the datatable variable does NOT persist - so get from session
MyTable = System.Web.UI.Page.Session["MyTable"];
}
public void LoadData()
{
MyTotal = 0;
MyTotalQty = 0;
qtycheck.Value = 0;
GridView1.DataSource = MyTable;
GridView1.DataBind();
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
TextBox MyAmount = e.Row.FindControl("Amount");
DataRow MyRow = MyTable.Rows(e.Row.RowIndex);
MyRow("Amount") = MyRow("Qty") * MyRow("Price");
if (MyRow("Purchased") == true)
{
// total up the qty purcchased and the amount
MyTotal += MyRow("Amount");
MyTotalQty += MyRow("Qty");
}
}
else if (e.Row.RowType == DataControlRowType.Footer)
{
// this is our bottom last footer.
e.Row.Cells(3).Text = Strings.FormatCurrency(MyTotal);
e.Row.Cells(2).Text = MyTotalQty;
e.Row.Cells(1).Text = "Totals:";
qtycheck.Value = MyTotalQty; // a hidden control - to check for qty > 0 on checkout
}
}
protected void CheckBox1_CheckedChanged1(object sender, EventArgs e)
{
// user click on purchase a row - udpate totals.
CheckBox cBox = sender;
int RowID = cBox.Attributes("MyRow");
MyTable.Rows(RowID).Item("Purchased") = cBox.Checked;
// data table has been changed - so we call the load data routine to udpate
// our grid
LoadData();
}
protected void Qty_TextChanged(object sender, EventArgs e)
{
// user changed the qry in a row
TextBox tBox = sender;
int RowID = tBox.Attributes("MyRow");
MyTable.Rows(RowID).Item("Qty") = tBox.Text;
// data table has been changed - so we call the load data routine to udpate
// our grid
LoadData();
}
}
Now that is a "bit" of code, but again, not really much.
So, you now get this after running:
So, notice what we do WHEN you check a box!
We simple do this:
protected void CheckBox1_CheckedChanged1(object sender, EventArgs e)
{
// user click on purchase a row - udpate totals.
CheckBox cBox = sender;
int RowID = cBox.Attributes("MyRow");
MyTable.Rows(RowID).Item("Purchased") = cBox.Checked;
// data table has been changed - so we call the load data routine to udpate
// our grid
LoadData();
}
So, now NO MATCHING problem really exists, does it? You click on a row, and we simply change the Purchased setting (a true/false flag). And that is it - done! no matching required. When you thus check a box, we change the table value, and then simply say to the code will you please re-display the data!!! So NOW we are SAVING all that matching work!!!
Now, the check out code becomes a walk in the park.
when you click on the button to check out, we jump to the checkout page.
The markup is now dead simple - since it much the same as the first page - but no ability to change things. Hence this:
<asp:GridView ID="GridView2" runat="server" ShowFooter="true"
Font-Bold="True" Font-Size="Larger" BackColor="#FFCC99"
AutoGenerateColumns="False"
>
<Columns>
<asp:BoundField DataField="Product" HeaderText="Product" Headerstyle-width="250px" />
<asp:BoundField DataField="Price" DataFormatString="{0:C2}" HeaderText="Price" Headerstyle-width="80px" />
<asp:BoundField DataField="Qty" HeaderText="Qty" Headerstyle-width="80px" />
<asp:BoundField DataField="Amount" HeaderText="Amount" Headerstyle-width="80px" />
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
</asp:GridView>
<br />
<asp:Button ID="ChangeOrder_btn" runat="server" PostBackUrl="~/SimpleButton.aspx" Text="Change order"
style="width:140px;height:60px;background-color:#FFCC99;border-radius:25px"
/>
<br />
</div>
And the page looks like:
So, you NOW see why we using a table - since the SAME data now drives both pages, and our problem becomes smaller and smaller - not larger and larger!!
And our code for that checkout page, it is this:
class CheckOut : System.Web.UI.Page
{
private decimal MyTotal = 0;
private int MyTotalQty = 0;
protected void Page_Load(object sender, System.EventArgs e)
{
DataTable MyTable = System.Web.UI.Page.Session["MyTable"];
DataView dv = new DataView(MyTable); // we use data view in palce of data table - it can fitler!!
dv.RowFilter = "Purchased = True";
GridView2.DataSource = dv;
GridView2.DataBind();
}
protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
MyTotal += e.Row.Cells(3).Text;
MyTotalQty += e.Row.Cells(2).Text;
}
else if (e.Row.RowType == DataControlRowType.Footer)
{
e.Row.Cells(3).Text = Strings.FormatCurrency(MyTotal);
e.Row.Cells(2).Text = MyTotalQty;
e.Row.Cells(1).Text = "Totals:";
}
}
}
So, by build a better design and mouse trap with the first page, and a better approach, then the next page becomes VERY simple, since we re-use the data, re-use the table and in fact darn near re-used the grid too!!!
And to display the order we ONLY have to get the table, and filter the results by purchased.
And the button to go back and change your mind? Well, it just jumps back to the that order page.
So while we did have to build up a bit more "markup" in the first page, we reduced by huge amounts the markup in the 2nd page.

How to use single LinkButton in a Gridview to update TextBox elsewhere on aspx page

Scenario:
I have a GridView named gvpat on my .aspx page. This GridView has five columns.
Hour
00 Min
15 Min
30 Min
45 Min
Each column except the Hour has a LinkButton.
What I want is when the LinkButton is clicked, it will look at the Hour column to get the hour and then look at the column the LinkButton resides in to get the minutes. And put the time in a TextBox named txtCustTime elsewhere on the .aspx page.
For example if a button is clicked on the row that contains the Hour 1PM and the column that button resides in is 15 Min then the value entered in the txtCustTime will equal 13:15
Here are visuals of the GridView for AM/PM
Here is the AM
Here is the PM
Now the Change to PM and Change to AM buttons simply rebind the grid when pressed (I wrote a function that binds the grid to the data) that is working and not apart of this question
Scenario END
My problem: When a LinkButton is pressed I call a function like this: For example lets say the user presses a LinkButton in the 45 Min Column and lets say they press the button on row 12AM or 12PM depending what time of the day they are looking at.
protected void gvpat_RowCommand(object sender, System.Web.UI.WebControls.GridViewCommandEventArgs e)
{
if (e.CommandName == "GetTime45")
{
//Get rowindex
int rowindex = Convert.ToInt32(e.CommandArgument);
//Get Row
GridViewRow gvr = gvpat.Rows[rowindex];
//Sets the label value for the linked button that was clicked
LinkButton lb = e.CommandSource as LinkButton;
if (gvpat.HeaderRow.Cells[4].Text == "45 Min")
{
Label myLabel = (Label)gvr.FindControl("lblhr");
if (myLabel.Text == "12AM") { txtCustTime.Text = "00:45:00"; }
if (myLabel.Text == "12PM") { txtCustTime.Text = "12:45:00"; }
}
}
}
My issue is when pressing the LinkButton while looking at the "AM" view,
txtCustTime is correctly set to 00:45:00
But if the user is looking at the "PM" view and presses the LinkButton,
txtCustTime is incorrectly set to blank. When it should be 12:45:00
NOTES:
lblhr - is the name of the control that holds the value in the GridView under the Hour column

You are probably overthinking it. All you need to do is bind a range of the correct time slots. So if you have the following GridView:
<asp:GridView ID="GridView1" runat="server" ItemType="System.DateTime"
OnRowCommand="GridView1_RowCommand">
<Columns>
<asp:TemplateField HeaderText="Hour">
<ItemTemplate>
<%# Item.ToLongTimeString() %>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="00 Min">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CommandArgument='<%# Item %>'>O</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="15 Min">
<ItemTemplate>
<asp:LinkButton ID="LinkButton2" runat="server" CommandArgument='<%# Item.AddMinutes(15) %>'>O</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="30 Min">
<ItemTemplate>
<asp:LinkButton ID="LinkButton3" runat="server" CommandArgument='<%# Item.AddMinutes(30) %>'>O</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="45 Min">
<ItemTemplate>
<asp:LinkButton ID="LinkButton4" runat="server" CommandArgument='<%# Item.AddMinutes(45) %>'>O</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Note the use of ItemType="System.DateTime". This will ensure we can work with a DateTime object all across the GridView and in code behind.
Now bind some data to the GridView.
GridView1.DataSource = Enumerable.Range(00, 12).Select(i => new DateTime(2000, 1, 1, i, 0, 0));
GridView1.DataBind();
Now the GridView has 12 rows with DateTime objects. Now the only thing left to do is handle the clicking of the LinkButton with a CommandArgument for the time block. Simply cast the CommandArgument to a DateTime object in code behind and you're done.
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
DateTime time = Convert.ToDateTime(e.CommandArgument);
Label1.Text = time.ToString("HH:mm");
}

Paging DataGrid Data using C#, Prev/Next don't work

Okay, I have looked everywhere and tried almost every suggestion that I could find and NOTHING has worked so far. D: Here's my problem:
I have a DataGrid with TemplateItemsthat the user has enteres into two TextBoxes that populates with data after the click of a button. My button takes two dates that the user enteres into two TextBoxes and pulls all entries between those dates from a DataBase. The entries are then displayed in the DataGrid. What I need this DataGrid to do is allow paging with 10 rows per page. All I need are Next and Prev links to go through the pages that contain data. The links work but the data doesn't change (Next doesn't go to the next page, the data remains the same). I know for a fact that there are more than 10 entries for Items between certain dates so I know the data should change based on what page it's on. Also, the Next buttons seems to be infinite. Why? Someone, please help me.
Now for some reason, when I get the data from the database, it starts out by getting all entries but then it only stores 10 (which is the amount that I want the pages to display at a time). The data never shows the rest that there should be... Why?! D':

Set New Page Index before you set datasource.
protected void dgArchive_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
{
if (source != null)
{
dgArchive.CurrentPageIndex = e.NewPageIndex;
JSP_Extrusion_QCEntities ent = new JSP_Extrusion_QCEntities(ConfigurationManager.ConnectionStrings["QCConnString"].ToString());
DateTime start = Convert.ToDateTime(Start.Text);
DateTime end = Convert.ToDateTime(End.Text).AddDays(1);
AllDataSources ds = new AllDataSources();
dgArchive.DataSource = ds.populateArchive(ent, start, end);
dgArchive.DataBind();
}
}
Also, why do you wire up your events on Page_Load? You don't need to do that if you do it on the markup.
These 3 lines:
GetDateEntries.Click += new EventHandler(GetDateEntries_Click);
dgArchive.VirtualItemCount = 200;
dgArchive.PageIndexChanged += new DataGridPageChangedEventHandler(dgArchive_PageIndexChanged);
Should be declared in the markup. Here's how you register on PageIndexChanged for your grid from the markup.
<asp:DataGrid ID="dgArchive" CssClass="data" AutoGenerateColumns="False" runat="server" AllowPaging="true"
PageSize="10" EnableViewState="true" AllowCustomPaging="true" Visible="false"
OnPageIndexChanged="dgArchive_PageIndexChanged"
>
Here's an example from MSDN.

You need to rebind the grid each time you change the page. Here's an example that outlines what you need to do:
<asp:DataGrid ID="DataGrid1" runat="server" OnPageIndexChanged="DataGrid1_PageIndexChange" ...>
Code-behind:
protected void DataGrid1_PageIndexChange(object sender, DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex = e.NewPageIndex;
BindDataGrid();
}
private void BindDataGrid()
{
DataGrid1.DataSource = GetSomeData();
DataGrid1.DataBind();
int total = dt.Rows.Count;
int pSize = grdJobs.PageSize;
int pIndex = grdJobs.CurrentPageIndex;
if (total < pSize)
pSize = total;
int start = (pSize * pIndex) + 1;
int end = (start + pSize) - 1;
if (end > total)
end = total;
lblTotalResults.Text = String.Format("Displaying {0}-{1} Of {2}", start, end, total);
}

So one of my co-workers ended up helping me with this one. Okay! This is the final result of my paging DataGrid. All of this code allowed me to get the number of items pulled from the database, set the VirtualItemCount (which also sets the number of pages that display), and page through the data. Please note that AllDataSources is a separate class that just pulls the data from the database in a way that works with my grid's set-up and CamSizerData is the name of the Table that contains all the data and is used to get the Count. If you have any other questions, please feel free to ask. :)
DataGrid
<asp:DataGrid ID="dgArchive" CssClass="data" AutoGenerateColumns="False" runat="server"
AllowPaging="True" AllowCustomPaging="True" Visible="False" OnPageIndexChanged="dgArchive_PageIndexChanged">
<Columns>
<asp:TemplateColumn HeaderStyle-CssClass="infoHeaderDG" ItemStyle-CssClass="line">
<HeaderTemplate>
Line</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="LineNumber" Text='<%# DataBinder.Eval(Container.DataItem, "LineNumber") %>'
runat="server" /></ItemTemplate>
<HeaderStyle CssClass="infoHeaderDG"></HeaderStyle>
<ItemStyle CssClass="line"></ItemStyle>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderStyle-CssClass="infoHeaderDG" ItemStyle-CssClass="date">
<HeaderTemplate>
Date</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="CreateDate" Text='<%# DataBinder.Eval(Container.DataItem, "CreateDate", "{0: MM/dd/yyyy}") %>'
runat="server" /></ItemTemplate>
<HeaderStyle CssClass="infoHeaderDG"></HeaderStyle>
<ItemStyle CssClass="date"></ItemStyle>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderStyle-CssClass="infoHeaderDG" ItemStyle-CssClass="operator">
<HeaderTemplate>
Operator</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="Operator" Text='<%# DataBinder.Eval(Container.DataItem, "Operator") %>'
runat="server" /></ItemTemplate>
<HeaderStyle CssClass="infoHeaderDG"></HeaderStyle>
<ItemStyle CssClass="operator"></ItemStyle>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderStyle-CssClass="infoHeaderDG" ItemStyle-CssClass="product">
<HeaderTemplate>
Product</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="Product" Text='<%# DataBinder.Eval(Container.DataItem, "ProdNumber") %>' runat="server" /></ItemTemplate>
<HeaderStyle CssClass="infoHeaderDG"></HeaderStyle>
<ItemStyle CssClass="product"></ItemStyle>
</asp:TemplateColumn>
</Columns>
<PagerStyle Mode="NumericPages" PageButtonCount="5" />
</asp:DataGrid>
Code Behind
protected void Page_Load(object sender, EventArgs e)
{
Page.MaintainScrollPositionOnPostBack = true;
}
protected void GetDateEntries_Click(object sender, EventArgs e)
{
dgArchive.Visible = true;
using (Entities ent = new Entities(ConfigurationManager.ConnectionStrings["QCConnString"].ToString()))
{
DateTime start = Convert.ToDateTime(Start.Text);
DateTime end = Convert.ToDateTime(End.Text).AddDays(1);
AllDataSources ds = new AllDataSources();
CamsizerData cd = new CamsizerData();
IEnumerable<CamsizerData> led = cd.GetBySelectedDates(ent, start, end);
int counter = led.Count();
dgArchive.VirtualItemCount = counter;
dgArchive.DataSource = ds.populateArchive(ent, start, end);
dgArchive.DataBind();
}
}
protected void dgArchive_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
{
if (source != null)
{
dgArchive.CurrentPageIndex = e.NewPageIndex;
Entities ent = new Entities(ConfigurationManager.ConnectionStrings["QCConnString"].ToString());
DateTime start = Convert.ToDateTime(Start.Text);
DateTime end = Convert.ToDateTime(End.Text).AddDays(1);
AllDataSources ds = new AllDataSources();
IEnumerable<object> recs = ds.populateArchive(ent, start, end);
dgArchive.DataSource = recs.Skip(10 * e.NewPageIndex);
dgArchive.DataBind();
}
}