MVC验证06-自定义错误信息

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：


             

 

  通过ErrorMessage来修改错误信息

[Email(ErrorMessage = "Email格式错误")]


[code][Display(Name = "邮件")]

public string Email { get; set; }

[/code]

.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; }

效果：





  在自定义验证特性中重写FormatErrorMessage方法

using System.ComponentModel.DataAnnotations;


[code]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);

}

}

}

[/code]

.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; }

效果：