/// <summary>
/// 非空提示
/// </summary>
/// <param name="textbox"></param>
/// <param name="strMessage"></param>
/// <returns></returns>
public static bool AlertMust(ComboBox combbox, string strMessage)
{
if (string.IsNullOrEmpty(AppUtil.GetSelectValue(ref combbox)))
{
ShowWarning(strMessage);
combbox.Focus();
return(true);
}
return(false);
}