ASP.NET MVC3 验证-白红宇

今天来看一下在ASP.NET MVC中如何实现系统验证和自定义验证。首先来看看我们都需要写哪些东西。

在Models里面我们用了edmx文件，对于我们要验证的字段我们写了部分类进行验证。当然你也可以将edmx生成poco，然后添加验证。我们就看看siteInformation中是如何写的。

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.ComponentModel.DataAnnotations;

namespace OnlinRegistration.Models

{

[MetadataType(

typeof(SiteInformation))]

public partial

class EIF_Sit_Information

{

}

public

sealed

class SiteInformation

{

[Required(AllowEmptyStrings =

false, ErrorMessage =

"毕业院校不能为空")]

[StringLength(32, ErrorMessage =

"毕业院校不能超过32个字符")]

public

string graduate_school { set; get; }

[Required(AllowEmptyStrings =

false, ErrorMessage =

"证书名称不能为空")]

[StringLength(32, ErrorMessage =

"证书名称不能超过32个字符")]

public

string certificate_name { set; get; }

[Required(AllowEmptyStrings =

false, ErrorMessage =

"证书编号不能为空")]

[StringLength(32, ErrorMessage =

"证书编号不能超过32个字符")]

public

string certificate_no { set; get; }

[Required(AllowEmptyStrings =

false, ErrorMessage =

"所学专业不能为空")]

[StringLength(32, ErrorMessage =

"所学专业不能超过16个字符")]

public

string prefessional { set; get; }

[Required(AllowEmptyStrings =

false, ErrorMessage =

"报考专业不能为空")]

[MaxLength(32, ErrorMessage =

"报考专业代码不能超过32个字符")]

public

string prefessional_code { set; get; }

}

在这里首先必须引用System.ComponentModel.DataAnnotations命名空间以及.net Assembly。在这里我们用了自带的一些验证。接下来我们看看自定义验证怎么写。先看一个class

public

class Student

{

public EIF_Student_Registration_Infos studentRegistration { set; get; }

public EIF_Sit_Information sitInformation { set; get; }

[YearRangeValidation(isValidateEmpty=

false)]

[DisplayName(

"年份")]

public

string workYear { set; get; }

[MonthRangeValidation(isValidateEmpty=

false)]

[DisplayName(

"月份")]

public

string workMoth { set; get; }

}

看到了吧，写了YearRangeValidation和MonthRangeValidation两个自定义验证。我们看看代码

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using System.ComponentModel.DataAnnotations;

namespace OnlinRegistration.Utility

{

[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple =

true, Inherited =

true)]

public

class YearRangeValidationAttribute : ValidationAttribute, IClientValidatable

{

public

bool isValidateEmpty { set; get; }

public YearRangeValidationAttribute()

base(

"年份不正确")

{}

public

override

bool IsValid(

object value)

{

if (isValidateEmpty)

{

try

{

int year = Convert.ToInt32(value);

return DateTime.Now.AddYears(-100).Year <= year && year <= DateTime.Now.Year;

}

catch

{

return

false;

}

else

{

string year = value

string;

if (

string.IsNullOrEmpty(year))

{

return

true;

}

else

{

try

{

int years = Convert.ToInt32(value);

return DateTime.Now.AddYears(-100).Year <= years && years <= DateTime.Now.Year;

}

catch

{

return

false;

}

public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)

{

ModelClientValidationRule rule =

new ModelClientValidationRule

{

ValidationType =

"yearrange",

ErrorMessage = FormatErrorMessage(metadata.GetDisplayName())

};

rule.ValidationParameters.Add(

"isvalidateempty", isValidateEmpty);

yield

return rule;

}

ok这就是要验证年份的验证类。他继承ValidationAttribute属性，实现IClientValidatable接口使得其既可以支持后台验证又可以支持前端验证。

我们看看页面上是如何绑定的。在页面上我绑定的是Student这个类。

@model OnlinRegistration.Models.Student

style

="background-color: #C4D3FD"

align

="right"

参加工作时间:

</td>

style

="background-color: #ffffff"

align

="left"

@Html.TextBoxFor(stu => stu.workYear, new { style = "width:80px" }) 年 @Html.TextBoxFor(stu => stu.workMoth, new { style = "width:80px" })

月 @Html.ValidationMessageFor(stu => stu.workYear) @Html.ValidationMessageFor(stu => stu.workMoth)

</td>

在这里我对工作年月进行了验证。当然这是后台验证，我们还需要写一些前台验证的js

$.validator.addMethod(

"yearrange",

function (value, element, param) {

var isValidateEmpty = Boolean.parse(param);

if (isValidateEmpty) {

var standby = /^\+?[1-9][0-9]*$/;

return standby.test(value) && parseInt(value) >=

new Date().getFullYear() - 100 && parseInt(value) <=

new Date().getFullYear();

}

else {

if (value == "" || value ==

null) {

return

true;

}

else {

var standby = /^\+?[1-9][0-9]*$/;

return standby.test(value) && parseInt(value) >=

new Date().getFullYear() - 100 && parseInt(value) <=

new Date().getFullYear();

}

});

$.validator.unobtrusive.adapters.addSingleVal(

"yearrange",

"isvalidateempty");

ok这样就实现了前台验证，在前台验证之前你要确保webconfig中的

appSettings

add

key

="webpages:Version"

value

="1.0.0.0"

add

key

="ClientValidationEnabled"

value

="true"

add

key

="UnobtrusiveJavaScriptEnabled"

value

="true"

add

key

="uploadPath"

value

="../../fileUpload"

appSettings

ClientValidationEnabled=true和UnobtrusiveJavaScriptEnabled=true。同时注意要引入jquery.validate.min.js,jquery.validate.unobtrusive.min.js,MicrosoftAjax.js,

MicrosoftMvcValidation.js。我们来看看效果

ok这样就完成了前后台的自定义验证。

本文转自 BruceAndLee 51CTO博客，原文链接：http://blog.51cto.com/leelei/638856，如需转载请自行联系原作者