GridView中找UserControl
//UserControl類別
public partial class Forms_Customer_WucCustomerStatement : System.Web.UI.UserControl
{
}
//在GridViewRow中取得使用者控制項，宣告的類別，其實就是自訂的UserContrl類別
Forms_Customer_WucCustomerStatement Wuc = (Forms_Customer_WucCustomerStatement)e.Row.FindControl("WucCustomerStatement1");//取得UserControl