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MVC验证06-自定义错误信息

2024-07-10 00:03:58   228人阅读

原文:MVC验证06-自定义错误信息

本文体验自定义错误信息。

  系统默认的错误信息

在"MVC验证02-自定义验证规则、邮件验证"中，我们自定义了一个验证Email的类。如果输入邮件格式错误，出现系统默认的报错信息。

效果：
邮件验证1             

 

  通过ErrorMessage来修改错误信息

[Email(ErrorMessage = "Email格式错误")]
[Display(Name = "邮件")]
public string Email { get; set; }
<style type="text/css">.csharpcode, .csharpcode pre{ font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/}.csharpcode pre { margin: 0em; }.csharpcode .rem { color: #008000; }.csharpcode .kwrd { color: #0000ff; }.csharpcode .str { color: #006080; }.csharpcode .op { color: #0000c0; }.csharpcode .preproc { color: #cc6633; }.csharpcode .asp { background-color: #ffff00; }.csharpcode .html { color: #800000; }.csharpcode .attr { color: #ff0000; }.csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em;}.csharpcode .lnum { color: #606060; }</style>

效果：
自定义错误1

  在自定义验证特性中重写FormatErrorMessage方法

using System.ComponentModel.DataAnnotations;
using System.Text.RegularExpressions;
using System.Web.Mvc;
 
namespace MvcValidation.Extension
{
    public sealed class EmailAttribute : ValidationAttribute, IClientValidatable
    {
        public const string reg = @"^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]+$";
 
        public EmailAttribute()
        {  
        }
 
        //重写基类方法
        public override bool IsValid(object value)
        {
            if (value == null)
                return true;
 
            if (value is string)
            {
                Regex regEx = new Regex(reg);
                return regEx.IsMatch(value.ToString());
            }
            return false;
        }
 
        public System.Collections.Generic.IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
        {
            ModelClientValidationRule rule = new ModelClientValidationRule
            {
                ValidationType = "email",
                ErrorMessage = FormatErrorMessage(metadata.GetDisplayName())
            };
            yield return rule;
        }
 
        /// <summary>
        /// 格式化错误信息
        /// </summary>
        /// <param name="name">属性名</param>
        /// <returns></returns>
        public override string FormatErrorMessage(string name)
        {
            return  this.ErrorMessage ?? string.Format("{0}属性没有输入正确的Email", name);
        }
    }
}
 
<style type="text/css">.csharpcode, .csharpcode pre{ font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/}.csharpcode pre { margin: 0em; }.csharpcode .rem { color: #008000; }.csharpcode .kwrd { color: #0000ff; }.csharpcode .str { color: #006080; }.csharpcode .op { color: #0000c0; }.csharpcode .preproc { color: #cc6633; }.csharpcode .asp { background-color: #ffff00; }.csharpcode .html { color: #800000; }.csharpcode .attr { color: #ff0000; }.csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em;}.csharpcode .lnum { color: #606060; }</style>

效果：
自定义错误2


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