I can't seem to be able to change the footer text. I've tried the sorted event as well but nothing happens. All I want to do is display status messages. Here is my code:
protected void PageSettings_Sorting(object sender, GridViewSortEventArgs e)
{
if (((GridView)sender).EditIndex > -1)
{
e.Cancel = true;
}
else
{
// tried this on sorted aswell but can't change footer text
GridViewRow row = ((GridView)sender).FooterRow as GridViewRow;
Label lblStatus = new Label{ ID="lblStatus", Text="Sorting Column <b>\"" + e.SortExpression + "\" " + e.SortDirection + "</b>"};
row.Cells[0].Text = "Hello World"; //.Controls.Add(lblStatus);
}
}
protected void PageSettings_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row != null && e.Row.RowType == DataControlRowType.Header)
{
}
else if (e.Row != null && e.Row.RowType == DataControlRowType.Footer)
{
int count = e.Row.Cells.Count;
for (int i = count - 1; i >= 1; i += -1)
{
e.Row.Cells.RemoveAt(i);
}
e.Row.Cells[0].ColumnSpan = count;
e.Row.Cells[0].Controls.Add(new Literal { ID = "lblStatus" });
// can't FindControl or change Literals either
e.Row.Cells[0].Text = "Hello World"; // works here but not on sorting event
}
}
<asp:GridView ID="PageSettings" runat="server"
AllowPaging="true" AllowSorting="true"
AutoGenerateColumns="false"
AutoGenerateDeleteButton="true"
AutoGenerateEditButton="true"
ShowFooter="true"
DataSourceID="ObjectDataSourcePages"
OnLoad="PageSettings_Load"
OnRowDataBound="PageSettings_DataBound"
OnRowCreated="PageSettings_RowCreated"
OnRowEditing="PageSettings_RowEditing"
OnRowCancelingEdit="PageSettings_RowCancelingEdit"
OnPageIndexChanging="PageSettings_PageIndexChanging"
OnSorting="PageSettings_Sorting"
OnSorted="PageSetting_Sorted"
PageSize="2">
<Columns>
<asp:TemplateField HeaderText="Page Name" HeaderStyle-HorizontalAlign="Left" SortExpression="Name">
<ItemTemplate>
<%# Eval("Name") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Name" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Path" HeaderStyle-HorizontalAlign="Left" SortExpression="Path">
<ItemTemplate>
<%# Eval("Path") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Path" runat="server" Text='<%# Bind("Path") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Route Value" HeaderStyle-HorizontalAlign="Left" SortExpression="RouteValue">
<ItemTemplate>
<%# Eval("RouteValue") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RouteValue" runat="server" Text='<%# Bind("RouteValue") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="RegExp" HeaderStyle-HorizontalAlign="Left" SortExpression="RegExp">
<ItemTemplate>
<%# Eval("RegExp") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RegExp" runat="server" Text='<%# Bind("RegExp") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
This will change the text of the first FooterRow cell:
protected void gv_Sorting(object sender, GridViewSortEventArgs e)
{
gv.FooterRow.Cells[0].Text = "Hello";
}
Of course you'll need to make sure your GridView's ShowFooter property is true.
Or alternatively, by casting sender and adding a control:
protected void Sorting(object sender, GridViewSortEventArgs e)
{
Label label = new Label();
label.Text = gv_s.Rows.Count.ToString() + " records";
((GridView)sender).FooterRow.Cells[0].Controls.Add(label);
}
Related
I have a GridView with Template Fields and Connection String is located in the
web.config File. Data is fetched by a stored procedure. I want to retrieve a single cell value of the Gridview in protected void someMethod(object sender, EventArgs e) on OnClick="someMethod" event. But it ends up with:
Object reference not set to an instance of an object.
Code that generates the OnClick Event:
<asp:TemplateField >
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" OnClick="someMethod">Get Name</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
The value of Gridview Cell i want to get is:
<asp:TemplateField HeaderText="Name">
<EditItemTemplate>
<asp:TextBox ID="forNames" runat="server"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="eForNames" runat="server" Text = '<%# Eval("Name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
And Code Behind is:
protected void someMethod(object sender, EventArgs e)
{
Label ename = diplayAdapter.SelectedRow.FindControl("eForNames") as Label;
Label5.Text = ename.Text;
}
.ASPX Code:
<asp:TemplateField >
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" CommandArgument="<%# Container.DisplayIndex %>" runat="server" CommandName="FindName">Get Name</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<EditItemTemplate>
<asp:TextBox ID="forNames" runat="server"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="eForNames" runat="server" Text = '<%# Eval("Name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
.CS Code
protected void GridView1_OnRowCommand(object sender, GridViewCommandEventArgs e)
{
try
{
//getting rowindex which we have selected by using CommandArgument
int rowindex = Convert.ToInt32(e.CommandArgument);
if (e.CommandName == "FindName")
{
Label5.Text= GridView1.Rows[rowindex].Cells[1].FindControl("eForNames");
}
}
catch (Exception ex)
{
Response.Write(ex);
}
}
Currently the code behind label control is giving me a null value when i submit the form. How can i add the value to a local variable?
Please advise.
JAVASCRIPT
$(document).ready(function () {
$(".chk").change(function () {
var total = 0;
var chks = $(".chk input:checked");
if (chks.length > 0) {
for (var i = 0; i < chks.length; i++) {
total += parseFloat($("#" + chks[i].id.replace("courseID", "lblcoursePrice")).html());
$("#<%=courseListView.ClientID %> [id*=hfTotal]").val("");
}
}
$("#<%=courseListView.ClientID %> [id*=lblTotal]").text(total.toFixed(2));
$("#<%=courseListView.ClientID %> [id*=hfTotal]").val($(this).val());
});
});
.NET PAGE
<asp:GridView ID="courseListView" AutoGenerateColumns="false" runat="server" ShowFooter="true">
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" />
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="courseID" class="chk" runat="server" />
<asp:Label ID="courseTitle" Text='<%# Eval("name") %>' runat="server"></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Label ID="Label2" Text="Total" runat="server"></asp:Label>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Price">
<ItemTemplate>
<asp:Label ID="lblcoursePrice" Text='<%# Eval("price") %>' runat="server"></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Label ID="lblTotal" Text="" runat="server"></asp:Label>
<asp:HiddenField ID="hfTotal" runat="server" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
CODE BEHIND
Label courseAmount = (Label)FindControl("lblTotal");
if (courseAmount != null)
{
course = courseAmount.Text; //courseButtonList.SelectedValue;
}
As I cannot see where you are trying to find this Label control. I'll give you options.
First : In Page Load or some other function
Label courseAmount = (Label)courseListView.Rows[0].Cells[0].FindControl("lblTotal");
Second : In courseListView_RowDataBound you can call like:
if (e.Row.RowType == DataControlRowType.DataRow)
{
Label lbl= (Label)e.Row.FindControl("lblTotal");
}
Third :
protected void courseListView_RowCommand(object sender, GridViewCommandEventArgs e)
{
GridViewRow valu = (GridViewRow)((LinkButton)e.CommandSource).NamingContainer;
int RowIndex = valu.RowIndex;
Label value = (Label)courseListView.Rows[RowIndex].FindControl("lblTotal");
string course = value.Text;
}
I have a GridView, which is populated using a linq query on button click.
I have to populate the header text dynamically, fetching from the database. The first time I click the button, the header text is not binding. But, if I click on the button a second time, the header texts are bound.
Markup:
<asp:GridView ID="grdresult" runat="server" AutoGenerateColumns="false"
OnRowDataBound="grdresult_RowDataBound">
<Columns>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol1" runat="server" Text=' <%#Eval("Col1") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol2" runat="server" Text='<%#Eval("Col2") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label runat="server" Text='<%#Eval("Col3") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol4" runat="server" Text=' <%#Eval("Col4") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol5" runat="server" Text='<%#Eval("Col5") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol6" runat="server" Text=' <%#Eval("Col6") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol7" runat="server" Text=' <%#Eval("Col7") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderStyle-Width="10%">
<ItemTemplate>
<asp:Label ID="lblCol8" runat="server" Text=' <%#Eval("Col8") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EmptyDataTemplate>
No Records Found
</EmptyDataTemplate>
</asp:GridView>
Codebehind:
protected void btnreport_Click(object sender, EventArgs e)
{
BindGrid();
}
protected void BindGrid()
{
var results = "LINQ select query from database";
}).Distinct().ToList();
for (int i = 0; i < grdresult.Columns.Count; i++)
{
grdresult.Columns[i].Visible = true;
}
grdresult.DataSource = results;
grdresult.DataBind();
}
protected void grdresult_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
var getColumnHeader = "LINQ query to get header text";
if (getColumnHeader != null)
{
grdresult.Columns[5].HeaderText = getColumnHeader.HCol3;
grdresult.Columns[6].HeaderText = getColumnHeader.HCol4;
grdresult.Columns[7].HeaderText = getColumnHeader.HCol5;
grdresult.Columns[8].HeaderText = getColumnHeader.HCol6;
grdresult.Columns[9].HeaderText = getColumnHeader.HCol7;
grdresult.Columns[10].HeaderText = getColumnHeader.HCol8;
grdresult.Columns[11].HeaderText = getColumnHeader.HCol9;
grdresult.Columns[12].HeaderText = getColumnHeader.HCol10;
}
}
//based on some condition i have set visibility of gridview columns
int TotalColumnCount = (int)ViewState["colcount"];
for (int i = grdresult.Columns.Count - 1; i > TotalColumnCount + 4; i--)
{
grdresult.Columns[i].Visible = false;
}
}
Instead of using the below line for binding header text
grdresult.Columns[5].HeaderText = getColumnHeader.HCol3;
i used below line which solved the issue.
e.Row.Cells[5].Text = getColumnHeader.HCol3;
This error can also occur if you are dumping an integer value into varchar() but the size of varchar is not enough. For example I was getting this error as I was cast sum() to varchar(10), and hence the error.
I changed varchar(10) to varchar(20) and the error got resolved.
In Gridview control set ClientIDMode = "Static"
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;
}
}
}
Im having trouble with my update command. It finds the textbox controls but it doesn't get the new values entered into it and i can't figure out why. i've done some tutorials and im not getting far. In my Update event is a class called Pages which updates the text and that works if i add the text values manually. The problem is accessing the newly updated text from my textboxes.
<asp:GridView ID="CustomGridView1" runat="server" AutoGenerateColumns="false" DataKeyNames="Name" AutoGenerateSelectButton="true"
ShowHeaderWhenEmpty="True" ShowFooter="true" AutoGenerateEditButton="true" OnDataBound="CustomGridView_DataBound"
OnRowEditing="CustomGridView_CancelEditCommand" OnRowCommand="CustomGridView1_RowCommand"
OnLoad="CustomGridView1_Load" OnRowUpdated="CustomGridView1_RowUpdated" OnRowUpdating="CustomGridView1_RowUpdating" OnRowCancelingEdit="CustomGridView1_RowCancelingEdit"
ShowHeader="true">
<Columns>
<asp:TemplateField HeaderText="Page Name" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<%# Eval("Name") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Name" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Path" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<%# Eval("Path") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="Path" runat="server" Text='<%# Bind("Path") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Route Value" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<%# Eval("RouteValue") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RouteValue" runat="server" Text='<%# Bind("RouteValue") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="RegExp" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<%# Eval("RegExp") %>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="RegExp" runat="server" Text='<%# Bind("RegExp") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
This part here isn't firing i prefere the method RowUpdated Method in the answer is there a reason why my Updated Event is not firing
protected void CustomGridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
if (e.Exception == null && e.AffectedRows == 1)
{
Pages pages = new Pages();
SystemPage SySPage = new SystemPage();
SySPage.Name = e.NewValues[0].ToString();
SySPage.Path = e.NewValues[1].ToString();
SySPage.RouteValue = e.NewValues[2].ToString();
SySPage.RegExp = e.NewValues[3].ToString();
pages.Update(SySPage, xmlFile);
CustomGridView1.EditIndex = -1;
BindData();
}
}
protected void CustomGridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
for (int i = 0; i < CustomGridView1.Columns.Count - 1; i++)
{
DataControlFieldCell cell = CustomGridView1.Rows[CustomGridView1.EditIndex].Cells[i] as DataControlFieldCell;
CustomGridView1.Columns[i].ExtractValuesFromCell(e.Keys, cell, DataControlRowState.Edit, false);
}
Pages pages = new Pages();
SystemPage SysPage = new SystemPage();
SysPage.Name = e.NewValues[0].ToString();
SysPage.Path = e.NewValues[1].ToString();
SysPage.RouteValue = e.NewValues[2].ToString();
SysPage.RegExp = e.NewValues[3].ToString();
pages.Update(SysPage, xmlFile);
lblInsert.Text = e.NewValues[3].ToString();
CustomGridView1.EditIndex = -1;
BindData();
}
To get the values AFTER updating you should handle the GridViews RowUpdated Event http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowupdated.aspx not the RowUpdating.
<asp:GridView OnRowUpdated="GridViewUpdatedEventHandler" />
Edit
The updated fields in the GridView are exposed by a property, NewValues, in the GridViewUpdatedEventArgs which is exposed as a parameter of the RowUpdated event.
Code as requested I cannot test this code as I am not near a dev pc.
Add the following method to your code file and set the GridViews OnRowUpdated property to point to the method.
protected void CustomGridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
if ((e.Exception == null) && (e.AffectedRows == 1))
{
Pages pages = new Pages();
SystemPage SysPage = new SystemPage();
SysPage.Name = e.NewValues[0].ToString();
SysPage.Path = e.NewValues[1].ToString();
SysPage.RouteValue = e.NewValues[2].ToString(); ;
SysPage.RegExp = e.NewValues[3].ToString(); ;
pages.Update(SysPage, xmlFile);
CustomGridView1.EditIndex = -1;
BindData();
}
else
// TO DO: ALERT the user the update errored
}