Linkbutton click in a asp:GridView cell does not trigger OnRowCommand event - asp.net

Question

UI Feature: I have a GridView with few columns. Most important column is PcCode, which shows a string value for each row.
Expected: When I click on one of the cell from a row of that PcCode column another GridView should be displayed. However, when I am trying to use a asp:LinkButton for a cell, things just don't work. RowCommand does not get triggered when I click on a asp:LinkButton in the GridView cell. Where am I doing things wrong? Which way the expected functionality can be achieved? Thanks in advance for helping out a newbie.
In the following code I was trying to get a RowIndex and pass it through the CommandArgument and use a CommandName.
.aspx code
<asp:GridView ID="_UIProfitcenterTotalGridView" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" AllowPaging="True" PageSize="22" ShowFooter="True" AutoGenerateColumns="False"
DataKeyNames="ProfitcenterCode" EnableViewState="False"
OnRowDataBound="_UIProfitcenterTotalGridView_RowDataBound"
OnPageIndexChanging="_UIProfitcenterTotalGridView_PageIndexChanging"
OnRowCommand="_UIProfitcenterTotalGridView_OnRowCommand">
<Columns>
<asp:TemplateField HeaderText="PcCode" InsertVisible="False"
ShowHeader="False" SortExpression="ProfitcenterCode" FooterText="Total" FooterStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:LinkButton ID="_UIPCCodeLinkButton" runat="server" Text='<%# Eval("ProfitcenterCode") %>'
CommandName="Select"
CommandArgument='<%# ((GridViewRow) Container).RowIndex %>'>
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
...
code behind for aspx.cs
protected void _UIProfitcenterTotalGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Select")
{
int index = Convert.ToInt32(e.CommandArgument);
GridViewRow row = _UIProfitcenterTotalGridView.Rows[index];
string ProfitcenterCode = _UIProfitcenterTotalGridView.DataKeys[_UIProfitcenterTotalGridView.SelectedIndex].Values["ProfitcenterCode"].ToString();
}
}
After the row is selected I need to take the selected row's value as a string and compare with a listitem to show a new GridView.
Tried
Using Link_Button_Click(Object sender, EventArgs e) and the following but failed.
protected void _UIProfitcenterTotalGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Select")
{string ProfitcenterCode = ((GridViewRow)(((LinkButton)e.CommandSource).NamingContainer)).Cells[2].Text;
}
}

Answer 1

I tried to use LinkButton_Click() event instead of RowCommand as jason suggested:
protected void LinkButton_Click(Object sender, EventArgs e)
{
LinkButton button = (LinkButton)sender;
GridViewRow row = (GridViewRow)button.NamingContainer;
if (row != null)
{
string theValue = ((LinkButton)sender).CommandArgument.ToString();
...
...
//code for the extra thing I needed to do after selecting a cell value.
}
}
However I still had the problem, which I figured out. The problem was the LinkButton was not binding to the rows thefore, it could not pass any value on selection. What was missing was the following code:
if (e.Row.RowType == DataControlRowType.DataRow)
{
LinkButton linkButton = new LinkButton();
linkButton.Text = e.Row.Cells[0].Text; //value of the first column from the grid
linkButton.Enabled = true;
linkButton.Click += new EventHandler(LinkButton_Click); //triggering the LinkButton event here.
e.Row.Cells[0].Controls.Add(linkButton);
}

Answer 2

You can use the sender object ( the link button that calls the event) and get the parent row from the gridview. Example:
Protected Sub linkButton_click(ByVal sender As Object, ByVal e As EventArgs)
'First cast the sender to a link button
Dim btn As LinkButton = CType(sender, LinkButton)
'now, if there is a command arguement, you can get that like this
Dim id As String = btn.CommandArgument
'to get the gridviewrow that the button is on:
Dim row As GridViewRow = CType(btn.NamingContainer, GridViewRow)
End Sub
It was hard to follow exactly what you were looking for, so if i missed something let me know and I will add it.
protected void linkButton_click(object sender, EventArgs e)
{
//First cast the sender to a link button
LinkButton btn = (LinkButton)sender;
//now, if there is a command arguement, you can get that like this
string id = btn.CommandArgument;
//to get the gridviewrow that the button is on:
GridViewRow row = (GridViewRow)btn.NamingContainer;
}
And change your linkbutton to:
<asp:LinkButton OnClick="linkButton_click" ID="_UIPCCodeLinkButton"
runat="server" Text='<%# Eval("ProfitcenterCode") %>'
CommandName="Select"
CommandArgument='<%# ((GridViewRow) Container).RowIndex %>'>