[英]Validating a series of asp.net textboxes with CustomValidator and an unique function
[英]ASP.NET - Validating a CustomValidator
我正在尝试让CustomValidator调用服务器方法(这是一个校验和,我认为这是正确的,但是正如您所看到的,我无法真正分辨出来),但是它从未被调用,我可以在文本框中输入任何内容,然后错误消息永远不会出现,并且在该方法中添加断点表明,无论在文本框中输入什么内容,都不会调用它。 我也需要客户端验证吗?
我的OnServerValidate看上去在我眼中正确地调用了该方法-我真的很茫然。 帮助非常感谢!
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>
后面的C#代码:
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;
}
}
如果您从不回发到服务器,则不会调用服务器端验证。 您可能需要进行一些客户端验证,因此您的用户无需提交表单即可获得验证结果。
此MSDN文章提供了同时使用服务器端和客户端验证的示例 : CustomValidator示例
我使用了您的标记和代码隐藏功能,它似乎可以正常工作。
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");
}
}
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.