Button Events in a GridView Control

คัดลอกมาจาก http://msdn.microsoft.com/en-us/library/bb907626.aspx ครับ
    <asp:Button ID="AddButton" runat="server" 
      CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"
      Text="Add to Cart" />

protected void GridView1_RowCommand(object sender, 
  GridViewCommandEventArgs e)
  if (e.CommandName == "AddToCart")
    // Retrieve the row index stored in the 
    // CommandArgument property.
    int index = Convert.ToInt32(e.CommandArgument);

    // Retrieve the row that contains the button 
    // from the Rows collection.
    GridViewRow row = GridView1.Rows[index];

    // Add code here to add the item to the shopping cart.



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