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Datagrid conditional row editing based on row data

I have an ASP.NET datagrid with a few rows in it. I'd like some of the rows to be editable, but not all of them (based on a particular data item in that row).
Originally, I was doing this with a ButtonColumn, but I wasn't able to turn that on or off for specific rows.
Here's what I have now:
<asp:DataGrid ID="grid1" runat="server" AutoGenerateColumns="false" EnableViewState="true" CssClass="GridviewControlStyle" CellSpacing="0" CellPadding="4" HeaderStyle-CssClass="HeaderStyle"
OnEditCommand="grid1_EditCommand" OnUpdateCommand="grid1_UpdateCommand" OnCancelCommand="grid1_CancelCommand" OnItemDataBound="grid1d_ItemDataBound">
<Columns>
<asp:TemplateColumn>
<HeaderTemplate>
<strong><%# Resources.Status %></strong>
</HeaderTemplate>
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.STATUS") %>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<HeaderTemplate>
<strong><%# Resources.Amount %></strong>
</HeaderTemplate>
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.AMT") %>
</ItemTemplate>
<EditItemTemplate>
<asp:CustomValidator ID="cvAmountGrid" OnServerValidate="cvAmountGrid_ServerValidate" Display="None" runat="server" ControlToValidate="txtAmount" />
<asp:TextBox ID="txtAmount" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.AMT") %>' CssClass="small" />
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<ItemTemplate>
<asp:Button runat="server" Text="Edit" ID="btnEdit" Visible='<%# IsRowEditable(Eval("STATUS").ToString()) %>' CommandName="Edit" />
<asp:Button runat="server" Text="Update" ID="btnUpdate" Visible="false" CommandName="Update" />
<asp:Button runat="server" Text="Cancel" ID="btnCancel" Visible="false" CommandName="Cancel" />
</ItemTemplate>
</asp:TemplateColumn>
</asp:DataGrid>
Code Behind:
public bool IsRowEditable(string status)
{
return !status.Equals("Locked", StringComparison.OrdinalIgnoreCase);
}
protected void grid1_EditCommand(object source, DataGridCommandEventArgs e)
{
grid1.EditItemIndex = e.Item.ItemIndex;
grid1.DataBind();
TextBox t = e.Item.FindControl("txtAmount") as TextBox;
t.Visible = true; //this can't be found
Button b = e.Item.FindControl("btnEdit") as Button;
b.Visible = false;
Button u = e.Item.FindControl("btnUpdate") as Button;
u.Visible = true;
Button c = e.Item.FindControl("btnCancel") as Button;
c.Visible = true;
}
There are a few problems I've run into with this approach. Firstly, calling DataBind seems to reset the visibility status I've set on any buttons. If I don't databind, then my editable column doesn't show as editable. So, I try to set the textbox to be editable manually; but findcontrol returns null so I can't. What am I doing wrong here?

Another way to achieve it;
There I removed data validation and column name data binders to avoid
complexities. You can try below with them.
Update and cancel buttons are under EditItemTemplate so they will appear at edit event.
.ASPX
<asp:DataGrid ID="grid1" runat="server" AutoGenerateColumns="false" EnableViewState="true" CssClass="GridviewControlStyle" CellSpacing="0" CellPadding="4" HeaderStyle-CssClass="HeaderStyle"
OnEditCommand="grid1_EditCommand" OnUpdateCommand="grid1_UpdateCommand" OnCancelCommand="grid1_CancelCommand" OnItemDataBound="grid1d_ItemDataBound">
<Columns>
<asp:TemplateColumn>
<HeaderTemplate>
<strong>Status</strong>
</HeaderTemplate>
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.STATUS") %>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<HeaderTemplate>
<strong>Amount</strong>
</HeaderTemplate>
<ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.AMT") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtAmount" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.AMT") %>' CssClass="small" ReadOnly="false"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<ItemTemplate>
<asp:Button runat="server" Text="Edit" ID="btnEdit" Visible='<%# IsRowEditable(Eval("STATUS").ToString()) %>' CommandName="Edit" />
</ItemTemplate>
<EditItemTemplate>
<asp:Button runat="server" Text="Update" ID="btnUpdate" CommandName="Update" />
<asp:Button runat="server" Text="Cancel" ID="btnCancel" CommandName="Cancel" />
</EditItemTemplate>
</asp:TemplateColumn>
</Columns>
Code Behind
There you don't have set the visibility manually. EditItemTemplate will handle it at the edit event and when the user clicks cancel or update the Edit template will be replaced with the view.
I used some hardcoded list of Data Items and you can replace it with actual data source and try.
List<DataItem> t;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
LoadData();
}
}
private void LoadData()
{
t = new List<DataItem>();
DataItem t1 = new DataItem() { AMT = 5, STATUS = "LOCKED" };
DataItem t2 = new DataItem() { AMT = 15, STATUS = "OPEN" };
DataItem t3 = new DataItem() { AMT = 25, STATUS = "OPEN" };
DataItem t4 = new DataItem() { AMT = 35, STATUS = "LOCKED" };
t.Add(t1);
t.Add(t2);
t.Add(t3);
t.Add(t4);
grid1.DataSource = t;
grid1.DataBind();
}
protected void grid1_UpdateCommand(object sender, DataGridCommandEventArgs e)
{
string newAmount = (e.Item.Cells[1].FindControl("txtAmount") as TextBox).Text;
//Update the data source with edited data
grid1.EditItemIndex = -1;
//Load Data with updated data
LoadData();
}
protected void grid1_CancelCommand(object sender, DataGridCommandEventArgs e)
{
grid1.EditItemIndex = -1; //Bring back the previous state
LoadData();
}
public bool IsRowEditable(string status)
{
return !status.Equals("Locked", StringComparison.OrdinalIgnoreCase);
}
protected void grid1_EditCommand(object source, DataGridCommandEventArgs e)
{
grid1.EditItemIndex = e.Item.ItemIndex;
LoadData();
}
protected void grid1d_ItemDataBound(object sender, DataGridItemEventArgs e)
{
}
DataItem.cs
public class DataItem
{
public int AMT { get; set; }
public string STATUS { get; set; }
}

Okay, I figured out a better way to do this. I added the code below to my markup for all three buttons:
Visible='<%# IsRowEditing(Container.ItemIndex) %>'
In my code behind, I checked to see if the row was currently being edited, and used that to control the visibility of the buttons:
protected bool IsRowEditing(int index)
{
return index > 0 && index == grid1.EditItemIndex;
}
This fixed all my issues and was much simpler than what I was trying to do previously. Databinding also works with this method.

assign a value to checkbox in a grid in code behind

I have following grid in asp.net
<asp:GridView ID="grdDWlocations" CssClass="table table-hover table-striped" runat="server" GridLines="None" ShowHeaderWhenEmpty="True"
EmptyDataText="No data found..." AutoGenerateColumns="False">
<Columns>
<asp:TemplateField HeaderText="" Visible="true">
<HeaderTemplate>
<asp:CheckBox ID="allDWlocchk" runat="server" Checked="true" Width="10px" onclick="CheckAllgrdReqDW(this)"></asp:CheckBox>
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chk_DWlocReq" runat="server" Checked="true" Width="5px" OnCheckedChanged="chk_Req_CheckedChangedDW_Click" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Code">
<ItemTemplate>
<asp:Label ID="lbl_DWCode" runat="server" Text='<%# Bind("Ml_loc_cd") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<asp:Label ID="lbl_DWDescription" runat="server" Text='<%# Bind("Ml_loc_desc") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
I want to assign value for "chk_DWlocReq" in code behind
like this
foreach (GridViewRow dgvr in grdDWlocations.Rows)
{
(CheckBox)dgvr.FindControl("chk_DWlocReq")=true;
}
but above one not valid, how can this do properly ?

I believe your code must be changed to:
foreach (GridViewRow dgvr in grdDWlocations.Rows)
{
((CheckBox)dgvr.FindControl("chk_DWlocReq")).Checked=true;
}

Use this:
foreach(GridViewRow row in GridView1.Rows) {
if(row.RowType == DataControlRowType.DataRow) {
CheckBox myCheckBoxID = row.FindControl("myCheckBoxID") as CheckBox;
}
myCheckBoxID.Checked = true;
}
OR
If you are handling RowDataBound event, it's like this:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if(e.Row.RowType == DataControlRowType.DataRow)
{
CheckBox myCheckBoxID = e.Row.FindControl("myCheckBoxID") as CheckBox;
}
myCheckBoxID.Checked = true;
}

Try the following:
CheckBox checkbox1 = dgvr.FindControl("chk_DWlocReq") as CheckBox;
checkbox1.Checked = true;

I used this code:
ds1.SelectCommand = String.Format("exec myStoredproc");
dv1 = (DataView)ds1.Select(DataSourceSelectArguments.Empty);
for (int i = 0; i < GridView1.Rows.Count; i++)
{
if (dv1.Table.Rows[i]["ReceiveNotification"].ToString() == "1")
{
((CheckBox)GridView1.Rows[i].FindControl("GV_chkNotification")).Checked = true;
}
else
{
((CheckBox)GridView1.Rows[i].FindControl("GV_chkNotification")).Checked = false;
}
}

Button onClick does not fire in GridView inside of TemplateField

I'm trying to write a code that would update only one record for the data.
I do not need to be able to update every field on the row, only one particular field.
I have page that defines a GridView as following:
<asp:Content runat="server" ID="BodyContent" ContentPlaceHolderID="MainContent">
<UpdatePanel>
<ContentTemplate>
<fieldset style="width: 1%">
<legend>Search Customer</legend>
<table>
<tr>
<td>
<asp:DropDownList id="ddlSearchOption"
AutoPostBack="True"
OnSelectedIndexChanged="ddlSearchOption_SelectedIndexChanged"
runat="server">
<asp:ListItem Selected="True" Value="SearchBy"> Search By </asp:ListItem>
<asp:ListItem Value="CustID"> Customer ID </asp:ListItem>
<asp:ListItem Value="CustFirst"> First Name </asp:ListItem>
<asp:ListItem Value="CustLast"> Last Name </asp:ListItem>
<asp:ListItem Value="CustCity"> City </asp:ListItem>
</asp:DropDownList>
</td>
<asp:Panel id="pnlCustSearch" runat="server" >
<td>
<asp:Label id="lblEntry" runat="server" Text="" width="120px"></asp:Label>
</td>
<td>
<asp:TextBox id="txtSearchOptions" runat="server" width="50px">Hello</asp:TextBox>
</td>
<td>
<asp:Button id="btnFind" Text="Search" runat="server" onClick="btnFind_Click"></asp:Button>
</td>
</asp:Panel>
</tr>
</table>
</fieldset>
<div id ="msg">
<asp:Label id="lblMsg" runat="server" Text=""></asp:Label>
</div>
<div id="gridShow">
<asp:GridView ID="GridView1" runat="server" GridLines="None" AutoGenerateColumns="false"
AlternatingRowStyle-BackColor="#EEEEEE" EditRowStyle-BorderColor="Red">
<Columns>
<asp:TemplateField Visible="true" HeaderText="Customer ID">
<ItemTemplate>
<asp:Label runat="server" ID="lblCustID" Text='<%#Eval("CustID")%>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="First Name">
<ItemTemplate>
<asp:Label runat="server" ID="lblFirstName" Text='<%#Eval("CustFirstName") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Last Name">
<ItemTemplate>
<asp:Label runat="server" ID="lblLastName" Text='<%#Eval("CustLastName") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="City">
<ItemTemplate>
<asp:Label runat="server" ID="lblCity" Text='<%#Eval("CustCity") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Email">
<ItemTemplate>
<asp:TextBox runat="server" ID="txtEmail" Text='<%#Eval("CustEmail") %>' />
<asp:Button runat="server" ID="btnUpdate" Text="Update" onClick="GridView1_btnUpdate_Click"/>
<asp:RequiredFieldValidator runat="server" ID="rfdCountry" ControlToValidate="txtEmail"
ValidationGroup="var1" ErrorMessage="*" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</ContentTemplate>
</UpdatePanel>
</asp:Content>
Then in codebehind I write the following:
protected void GridView1_btnUpdate_Click(Object sender, EventArgs e)
{
//Code goes here
}
When clicking button to update email nothing happens.
What am I doing wrong?
I tried to use one of suggestions here:
if (!IsPostBack)
{
GridView1.DataSource = App_Data.DataHandler.GetData("fname", "de");
GridView1.DataBind();
GridView1.Visible = true;
}
The data is displayed but the click event does not work anyway
I added the following to my GridView definition:
onrowcommand="GridView1_RowCommand"
and added the code suggested:
<asp:Button runat="server" ID="btnUpdate" Text="Update" CommandName="UpdateEmail"
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"/>
In my .cs file I added the following:
protected void GridView1_RowCommand(Object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "UpdateEmail")
{
//Get the index from the argument
int index = Convert.ToInt32(e.CommandArgument);
//Get the row
GridViewRow row = GridView1.Rows[index];
//Do whatever you need with your row here!
}
}
Still, click event does not fire.
Ok, here is my code behind .cs file:
public partial class index : System.Web.UI.Page
{
protected override object LoadPageStateFromPersistenceMedium()
{
return Session["__VIEWSTATE"];
}
protected override void SavePageStateToPersistenceMedium(object viewState)
{
Session["VIEWSTATE"] = viewState;
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
Reset();
else
lblMsg.Text = "";
}
protected void Reset()
{
pnlCustSearch.Visible = false;
GridView1.Visible = false;
lblMsg.Text = "";
}
protected void ddlSearchOption_SelectedIndexChanged(object sender, EventArgs e)
{
Reset();
String ddlSelected = ddlSearchOption.SelectedValue;
if (ddlSelected != "")
{
ViewState["ddlSelected"] = ddlSelected;
pnlCustSearch.Visible = true;
SelectLabel(ddlSelected);
}
}
protected void SelectLabel(String choice)
{
switch (choice)
{
case "CustID":
lblEntry.Text = "Enter Customer ID";
break;
case "CustFirst":
lblEntry.Text = "Enter First Name";
break;
case "CustLast":
lblEntry.Text = "Enter Last Name";
break;
case "CustCity":
lblEntry.Text = "Enter City";
break;
default:
lblEntry.Text = "Enter Customer ID";
break;
}
}
protected void btnFind_Click(object sender, EventArgs e)
{
GridView1.Visible = true;
String option = (String)ViewState["ddlSelected"];
String input = txtSearchOptions.Text.Trim();
GridView1.DataSource = DataHandler.GetData(option,input);
GridView1.DataBind();
GridView1.Visible = true;
}
protected void GridView1_RowCommand(Object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "UpdateEmail")
{
//Get the index from the argument
int index = Convert.ToInt32(e.CommandArgument);
//Get the row
GridViewRow row = GridView1.Rows[index];
//Do whatever you need with your row here!
}
}
protected void btnUpdate_Click(Object sender, EventArgs e)
{
String txt = null;
txt = "here";
}
}

When you try to handle events from GridView, you need to use a CommandName and a CommandArgument then handle the RowCommand event from the GridView.
See http://msdn.microsoft.com/... for reference.
ASP.Net page should look like :
<asp:ButtonField runat="server" ID="btnUpdate" Text="Update"
CommandName="UpdateEmail"
CommandArgument="<%# CType(Container,GridViewRow).RowIndex %>" />
In the RowCommand event :
if (e.CommandName == "UpdateEmail")
{
//Get the index from the argument
int index = Convert.ToInt32(e.CommandArgument);
//Get the row
GridViewRow row = GridView1.Rows[index];
//Do whatever you need with your row here!
}

I got it, finally. I had to change <asp:Button/> to
`<asp:ButtonField Text="Update Email" CommandName="UpdateEmail"`
and remove it from ItemTemplate.
But why this was a problem. What I wanted to do is just to display textfield in the same itemtemplate with button?

Actually, the answer was much easier then I thought originally. I just used different values to set session: __VIEWSTATE and VIEWSTATE
protected override object LoadPageStateFromPersistenceMedium()
{
return Session["__VIEWSTATE"];
}
protected override void SavePageStateToPersistenceMedium(object viewState)
{
Session["VIEWSTATE"] = viewState;
}
As soon as I changed it, button was able to fire events.
Thank you

How to enable column in GridView?

I've a ASP.NET GridView with the following data:
Rows will be disable OnRowDataBound based on the value on column3.
GridView :
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"
onrowdatabound="GridView1_RowDataBound1">
<Columns>
<asp:TemplateField HeaderText="Column1">
<ItemTemplate>
<asp:HyperLink ID="hyperlink" runat="server" Text='<% #Eval("Dosage") %>' NavigateUrl='<% #Eval("Dosage") %>'></asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Column2">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<% #Eval("Drug") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Column3">
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<% #Eval("Patient") %>' ></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Column4">
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<% #Eval("Date") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
RowDataBound :
protected void GridView1_RowDataBound1(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Label a = e.Row.FindControl("Label3") as Label;
if (a.Text == "Sam")
{
e.Row.Enabled = false;
e.Row.Cells[0].Enabled = true;
}
}
}
however, I want column1 always enable, hyperlink in column1 should always clickable.
I've tried get the cells and enabled it, but it is not working.
kindly advise what is the workaround for the issue above.

You can do this by enable/disable particular cell.
protected void GridView1_RowDataBound1(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Label a = e.Row.FindControl("Label3") as Label;
if (a.Text == "Sam")
{
e.Row.Cells[0].Enabled = true;
e.Row.Cells[1].Enabled = false;
e.Row.Cells[2].Enabled = false;
e.Row.Cells[3].Enabled = false;
}
}
}

Get the id of selected checkboxes in gridview (Asp.net) c#

I have two columns one for id & other for checkboxes.
i have taken checkboxes inside the gridview.
i wanted to see the checked values inside the gridview , If checkboxes are checked then i want those values i.e id
Asp.net

foreach(Gridviewrow gvr in Gridview1.Rows)
{
if(((CheckBox)gvr.findcontrol("CheckBox1")).Checked == true)
{
int uPrimaryid= gvr.cells["uPrimaryID"];
}
}

What you will have to do is use a template field:
<asp:TemplateField HeaderText="Field">
<ItemTemplate>
<div style="display: block">
<asp:Checkbox Checked='<%# DataBinder.Eval(Container.DataItem,"Field") %>'
runat="server" ID="chkField"></asp:Label>
</div>
</ItemTemplate>
</asp:TemplateField>
Then you can do:
foreach (DataGridRow dr in DataGrid1.Rows)
{
((CheckBox)gvr.FindControl("chkField")).Checked
}
to see if it's checked

in your aspx you have the following
<asp:GridView ID="gridViewID" runat="server" DataKeyNames="DataKey1,DataKey2,DataKey3" >
<Columns>
<asp:TemplateField HeaderText="selected">
<ItemTemplate>
<asp:CheckBox ID="checkBoxID" runat="server"
Checked='<%# Bind("Selected") %>'
OnCheckedChanged="checkBoxID_CheckedChanged"
AccessKey='<%# Container.DataItemIndex %>'
AutoPostBack="True" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Then in your event handler you do something similar to this:
protected void checkBoxID_CheckedChanged(object sender, EventArgs e)
{
var checkbox = (CheckBox)sender;
var rowIndex = Convert.ToInt32(checkbox.AccessKey);
var gridView = GetErhebungModulGridView();
var dataKey = gridView.DataKeys[rowIndex];
if (dataKey != null)
{
var dataKey1 = dataKey["DataKey1"];
var dataKey2 = dataKey["DataKey2"];
var dataKey3 = dataKey["DataKey3"];
//Do something with the variables keys above
}
}

<asp:gridview id="gv" runat="server">
<columns>
<asP:TemplateField>
<Asp:checkbox id="chk" runat="server" />
<Asp:literal id="ltlID" runat="server" visible="false" text='<%#eval("ID")%>' />
</asp:TemplateField>
</columns>
</asp:gridview>
For each row as gridviewrow in gv.rows
if ctype(row.findcontrol("chk"),checkbox).checked then
Dim _ID as integer = ctype(row.findcontrol("ltlID"),literal).text
end if
next