Edit Individual GridView Cells in ASP.Net

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ASP.NET

Hello,

I am attempting to determine which grid cell (i.e. row and column) is being edited but having some difficulty. The grid cells are comprised of textbox control in a template field. I'd tried following the code used in the Code Project article "Edit Individual GridView Cells in ASP.Net". Here's a sample of the code:


HTML:
<pre lang="HTML">
<asp:GridView ID="grdBusinessCodes" runat="server" style="z-index:101; font-family:'Arial'; font-size:9pt;"
CssClass="GridAppearanceStyle" HeaderStyle-CssClass="GridHeaderStyle" AutoGenerateColumns="False" RowStyle-CssClass="GridItemStyle">

    <RowStyle CssClass="GridItemStyle" />
    <Columns>                
        <asp:TemplateField HeaderText="Column0" Visible="False">
            <ItemTemplate>
                 <asp:TextBox ID="TextBox0" runat="server" Text='<%# Bind("Column0") %>' style="font-family:'Arial'; font-size:9pt;" 
                    TextMode="MultiLine" Enabled="True" ReadOnly="False" AutoPostBack="true" OnTextChanged="TextBox0_TextChanged"></asp:TextBox>                                 
            </ItemTemplate>
        </asp:TemplateField>
        
        <asp:TemplateField HeaderText="Column1" Visible="False">
            <ItemTemplate>
                <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Column1", "{0:c}") %>' 
                    style="font-family:'Arial'; font-size:9pt;" TextMode="MultiLine" AutoPostBack="true" OnTextChanged="TextBox1_TextChanged"></asp:TextBox>
            </ItemTemplate>
        </asp:TemplateField>

        <asp:CommandField HeaderText="row_selector" ShowDeleteButton="False" 
            ShowEditButton="True" ShowInsertButton="False" ShowSelectButton="True" ButtonType="Link" Visible="False" />
    </Columns>
    <HeaderStyle CssClass="GridHeaderStyle" />

</asp:GridView>

Behind-code:

Private Sub grdBusinessCodes_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles grdBusinessCodes.RowCommand

        m_RowIndex = Integer.Parse(e.CommandArgument.ToString())
        miColumnClicked = Integer.Parse(Request.Form("__EVENTARGUMENT").ToString())        

End Sub



Private Sub grdBusinessCodes_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles grdBusinessCodes.RowDataBound
        Dim itemType As DataControlRowType = e.Row.RowType
        Dim button As LinkButton
        Dim strPostBack As String
        Dim sJavaScriptArg As String


        If e.Row.RowType = DataControlRowType.DataRow Then
            'get the link button control in the first cell
            button = CType(e.Row.Cells(e.Row.Cells.Count - 1).Controls(0), LinkButton)    'The linkbutton is in the last cell **jf 8/1/14                                    
            strPostBack = Me.Page.ClientScript.GetPostBackClientHyperlink(button, "")

            For i = 0 To e.Row.Cells.Count - 1
                'add the column index as the event argument parameter
                sJavaScriptArg = strPostBack.Insert(strPostBack.Length - 2, i.ToString)
                

                If e.Row.Cells(i).HasControls And e.Row.Cells(i).Controls.Count > 1 Then 'TypeOf e.Row.Cells(i).Controls(1) Is TextBox Then
                    If i <> (e.Row.Cells.Count - 1) Then
                        CType(e.Row.Cells(i).Controls(1), TextBox).Attributes("onclick") = sJavaScriptArg
                        CType(e.Row.Cells(i).Controls(1), TextBox).Attributes.Add("onclick", "this.style.backgroundColor='Highlight';")
                        CType(e.Row.Cells(i).Controls(1), TextBox).Attributes.Add("onblur", "this.style.backgroundColor='White';")
                    End If
		End If
	    Next
	End If

End Sub

The cells can be edited individually but unable determine which row and column the cell belongs to.

Any help is appreciated.