Command Argument not carrying over...

Hi,

I have this code that hides a column in a gridview.  (The column houses another nested gridview).

    Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
        If e.CommandName = "Select" Then
            If GridView1.Columns(0).Visible = False Then
                GridView1.Columns(0).Visible = True
            Else
                GridView1.Columns(0).Visible = False
            End If
        End If
    End Sub

The trouble is that if I click the select link on one row that action to hide is carried out on all rows.  How can I set this up so that it only hides the row that is selected?

Thanks.

Here is the content page:

********************************************************************

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="JavaDynamicCopyValue.aspx.cs" Inherits="JavaDynamicCopyValue" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
 <script type="text/javascript" >
 function copyValue(input, output )
{
   ouput.value = input.value;
   return true;
}
 </script>
 <asp:TextBox ID="txt1" runat="server" onchange="copyValue(this,document.getElementById('<%=txt2.ClientID%>'))"></asp:TextBox>
    <br />
    <br />
    <asp:TextBox ID="txt2" runat="server"></asp:TextBox>
</asp:Content>

********************************************************************

I got a javascript run time error says output is undefined. if I view source of the page, the txt1 markup became:

<input name="ctl00$ContentPlaceHol

Could someone please tell me what is wrong with my syntax here?  I'd be much appreciative.

objCmd = New SQLCommand("SELECT CASE WHEN objDR('Item') = 'Enter Bill of Lading' then enterbol " _  

& "WHEN objDR('Item') = 'Bill of Lading History' THEN bolhistory " _  

& "WHEN objDR('Item') = 'Request Transfer' or objDR('Item') = 'View Transfer in Progress' THEN transfers " _  

& "END  from plantGroups where plantgroupid=@plantgroupid", objConn)

Service-oriented architecture is a great framework when you need to perform distributed computing tasks over the Internet. But when you want to perform processing inside your local network, a different solution may provide a better fit. That solution, based on the Command pattern, uses Windows services and Microsoft Message Queuing to implement a queued system that meets your needs better than a service-oriented solution. This article explains how to build it.

Brad King

MSDN Magazine September 2004

In Windows Forms applications, similar commands, such as those in a menu and their counterparts on a toolbar, are not automatically related. They don't fire the same event or run the same handler routine. Yet code that allows the same or similar user commands to fire the same code simplifies development.This article describes the principles of command management and why it's important to have functional commands that are not exclusive to any one UI element. In order to provide an MFC-like command management infrastructure, a design pattern is developed and applied as a series of C# classes.

Michael Foster and Gilberto Araya

MSDN Magazine October 2002

Hi,

How can I catch this exception? I do not want it to stop my page execution. Can/Should I do that?

Server Error in '/' Application.
________________________________________
Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally