Get clicked cell index in gridview (not datagridview) asp.net

Question

When I click cell in gridview (not datagridview) I want to get cell index (not row index), not row index. I use asp.net - c#

In `ASP.NET` there is no `DataGridView`, so are you really referring to ASP.NET? — Tim Schmelter, Jul 03 '15 at 09:11
Would make sense if you wrote "gridview(not datagrid)", otherwise the informations is redundant since ASP.NET is not winforms. But i get it. — Tim Schmelter, Jul 03 '15 at 09:14
I wrote that because I wrote similar question and I had answer for datagridview — zvonnkko, Jul 03 '15 at 09:17

Tim Schmelter · Accepted Answer · 2015-07-03T09:51:07.190

Use the RowCreated event to register a cell-click on each cell and handle the GridView's SelectedIndexChangedEvent:

protected void OnRowCreated(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        for (int i = 0; i < e.Row.Cells.Count; i++ )
        {
            TableCell cell = e.Row.Cells[i];
            cell.Attributes["onmouseover"] = "this.style.cursor='pointer';this.style.textDecoration='underline';";
            cell.Attributes["onmouseout"] = "this.style.textDecoration='none';";
            cell.ToolTip = "You can click this cell";
            cell.Attributes["onclick"] = string.Format("document.getElementById('{0}').value = {1}; {2}"
               , SelectedGridCellIndex.ClientID, i
               , Page.ClientScript.GetPostBackClientHyperlink((GridView)sender, string.Format("Select${0}", e.Row.RowIndex)));
        }
    }
}

protected void SelectedIndexChanged( Object sender, EventArgs e)
{
    var grid = (GridView) sender;
    GridViewRow selectedRow = grid.SelectedRow;
    int rowIndex = grid.SelectedIndex;
    int selectedCellIndex = int.Parse(this.SelectedGridCellIndex.Value);
}

SelectedGridCellIndex is a hidden-field which is added declaratively on the aspx to store the selected index:

<asp:HiddenField ID="SelectedGridCellIndex" runat="server" Value="-1" />
<asp:GridView ID="GridView1" runat="server" 
    OnRowCreated="OnRowCreated" 
    OnSelectedIndexChanged="SelectedIndexChanged" 
    OnRowDataBound="OnRowDataBound" AutoGenerateColumns="false">
   <Columns>
     .....

You need to disable event-validation for this page, otherwise ASP.NET complains:

<%@ Page Language="C#" AutoEventWireup="true" EnableEventValidation="false" CodeBehind="Grid.aspx.cs" Inherits="CSharp_WebApp.Grid" %>

Thank You for your reply, but what should I write in SelectedIndexChangedEvent? — zvonnkko, Jul 03 '15 at 09:37
@zvonnkko: now i have tested it, you need a lightly different approach. have a look at my edited answer. — Tim Schmelter, Jul 03 '15 at 09:46
@Tim Schmelter I followed your instruction but nowhere I click on GridView, selectedCellIndex returns value of -1? — Jovica, May 02 '22 at 08:45

Get clicked cell index in gridview (not datagridview) asp.net

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