>How do you determine which button was clicked when you have multiple Select type bound columns?


You need to implement the ItemCommand event of the DataGrid and then do something like this:

protected void ItemCommand(object sender, DataGridCommandEventArgs e) 
{
	// *** Button command Names contain Sku value if set
	if (e.CommandName != null && e.CommandName != "" && e.CommandName != "Page") 
	{
		// *** If we clicked on one of the items to buy - redirect to the item page
		string sku = e.CommandName;
		string qty = ((TextBox) e.Item.FindControl("qty")).Text;
		if (sku != null && sku!="") 
		{
			Server.Transfer("Item.aspx?sku=" + sku.Trim() + "&qty=" + qty + "&Action=Add");
			//Response.Redirect("Item.aspx?sku=" + sku.Trim() + "&qty=" + qty + "&Action=Add");
		}
		
	}
}

Note that this event fires for any clicks you make on buttons, page links etc. so it's important that you filter out all the stuff you're not interested in. In the above example I filter out Page requests and nulls before picking up the values.

Notice also that you get a reference to the selected row with the e.Item property. From there you can query individual values of that row by using FindControl and then retrieving the values.

It's very flexible...