customvalidator可以编程控制.txt

学习积累的代码段

private void CustomValidator1_ServerValidate_1(object source, System.Web.UI.WebControls.ServerValidateEventArgs args)
		{
			string lname=args.Value;
			if(DB.judge(lname))
			{
				args.IsValid=false;

			
			}
			else
			{
				args.IsValid=true;
			}
		}

定义的类中的静态方法
	public static bool judge(string lname)
		{
			SqlConnection con =DB.creatconnection();
			con.Open();
			SqlCommand cmd =new SqlCommand("select count(*) from login where lname='"+lname+"'",con );
			int count =Convert.ToInt32(cmd.ExecuteScalar());
			if (count>0)
			{
				return true;
	
			
			}
			else {
			
			     return false;
			}