Question

我试图让CustomValidator调用服务器方法（它是一个校验和，我认为它是正确的，但是你会发现我无法告诉它）但它从未被调用，我可以在文本框中输入任何内容并且错误消息永远不会出现，并且在方法中添加断点表明它根本不会被调用，无论什么＆＃39 ; s在文本框中输入。我是否也需要客户端验证？

我的OnServerValidate看起来正确地调用了我的眼睛方法 - 我真的很茫然。非常感谢！

ASP.Net代码：

   <asp:Label ID="lblPPSN" runat="server" Text="PPS number: "></asp:Label>
    <asp:TextBox ID="tbxPPSN" runat="server"></asp:TextBox>
    <asp:CustomValidator ID="customval_PPSN" runat="server" ErrorMessage="Please enter a valid PPSN" ControlToValidate="tbxPPSN"
        OnServerValidate="customval_PPSN_ServerValidate" ForeColor="Red"></asp:CustomValidator>

c＃代码隐藏：

 protected void customval_PPSN_ServerValidate(object source, ServerValidateEventArgs args)
    {
        string checkChar = "", formatChar = "", input = tbxPPSN.Text;
        bool newFormat = false;

        if (input.Length > 9)
        {
            args.IsValid = false;
            return;
        }

        if (input.Length == 9)
        {
            newFormat = true;
        }

        char[] PPSArray = input.ToCharArray();
        Array.Reverse(PPSArray);
        checkChar = PPSArray[0].ToString();

        if (newFormat)
        {
            checkChar = PPSArray[1].ToString();
            formatChar = PPSArray[0].ToString();
        }

        checkChar = checkChar.ToLower();
        formatChar = formatChar.ToLower();

        int seed = 2, PPSParsed = 0, PPSsum = 0, PPSMod = 0;

        foreach (char ppschar in PPSArray)
        {
            if (int.TryParse(ppschar.ToString(), out PPSParsed))
            {
                PPSsum += PPSParsed * seed;
                seed++;
            }
        }

        if (newFormat)
        {
            PPSsum += Convert.ToInt32(formatChar.ToCharArray()[0] - 96) * 9;
        }

        PPSMod = PPSsum % 23;

        if (PPSMod == 0) PPSMod = 23;

        if (Convert.ToString((char) (96 + PPSMod)).ToLower() == checkChar)
        {
            args.IsValid = true;
            return;
        }
        else
        {
            args.IsValid = false;
        }
    }

Answer 1

如果您从未回发到服务器，则不会调用服务器端验证。您可能希望进行一些客户端验证，以便您的用户无需提交表单以获取其验证结果。

这篇MSDN文章有一个使用服务器端和客户端验证的例子： CustomValidator Example

我使用了你的标记和代码隐藏，它似乎有效。

标记：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Val.aspx.cs" Inherits="CustomValidatorExample.Val" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="lblPPSN" runat="server" Text="PPS number: "></asp:Label>
            <asp:TextBox ID="tbxPPSN" runat="server"></asp:TextBox>
            <asp:CustomValidator ID="customval_PPSN" runat="server" ErrorMessage="Please enter a valid PPSN" ControlToValidate="tbxPPSN"
                OnServerValidate="customval_PPSN_ServerValidate" ForeColor="Red"></asp:CustomValidator>
            <asp:Button runat="server" ID="button1" Text="Validate" OnClick="button1_Click" />
        </div>
    </form>
</body>
</html>

代码隐藏：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CustomValidatorExample
{
    public partial class Val : System.Web.UI.Page
    {
        protected void customval_PPSN_ServerValidate(object source, ServerValidateEventArgs args)
        {
            string checkChar = "", formatChar = "", input = tbxPPSN.Text;
            bool newFormat = false;

            if (input.Length > 9)
            {
                args.IsValid = false;
                return;
            }

            if (input.Length == 9)
            {
                newFormat = true;
            }

            char[] PPSArray = input.ToCharArray();
            Array.Reverse(PPSArray);
            checkChar = PPSArray[0].ToString();

            if (newFormat)
            {
                checkChar = PPSArray[1].ToString();
                formatChar = PPSArray[0].ToString();
            }

            checkChar = checkChar.ToLower();
            formatChar = formatChar.ToLower();

            int seed = 2, PPSParsed = 0, PPSsum = 0, PPSMod = 0;

            foreach (char ppschar in PPSArray)
            {
                if (int.TryParse(ppschar.ToString(), out PPSParsed))
                {
                    PPSsum += PPSParsed * seed;
                    seed++;
                }
            }

            if (newFormat)
            {
                PPSsum += Convert.ToInt32(formatChar.ToCharArray()[0] - 96) * 9;
            }

            PPSMod = PPSsum % 23;

            if (PPSMod == 0) PPSMod = 23;

            if (Convert.ToString((char)(96 + PPSMod)).ToLower() == checkChar)
            {
                args.IsValid = true;
                return;
            }
            else
            {
                args.IsValid = false;
            }
        }

        protected void button1_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                Response.Write("Valid");
            }
        }
    }
}

ASP.NET - 验证CustomValidator

1 个答案: