ASP.NET MVC的数据验证机制，比起ASP.NET WEBFORM那种高效很多。下面记录以下两个示例，以便日后方便查阅。
方式一：在Controller里通过AddModelError方法返回错误的验证信息，看一下代码示例：
Controller里的，注意看一下，他Add的时候提交是HTTPPOST，并且传参是传一个MODEL进来。
public ActionResult Add()
{
return View();
} [HttpPost]
public ActionResult Add(Package.Model.Message message)
{
if (message.gName == null)
{
ModelState.AddModelError("gName", "姓名不能为空");
}
if (message.gContent == null)
{
ModelState.AddModelError("gContent", "内容不能为空");
} if (ModelState.IsValid)
{
MessageDal msgDao = new MessageDal();
msgDao.Add(message);
return View();
} return View(); } }
View里面的
@model Package.Model.Message
@{
Layout = null;
} <!DOCTYPE html> <html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Add</title>
</head>
<body>
<div>
@using (Html.BeginForm())
{
@Html.ValidationSummary(true);
<fieldset>
<legend>我要留言</legend>
<div>
留言名称:@Html.TextBoxFor(a => a.gName)
@Html.ValidationMessageFor(a => a.gName)
</div>
<div>
留言内容:@Html.TextBoxFor(a => a.gContent)
@Html.ValidationMessageFor(a => a.gContent)
</div>
<input type="submit" id="btnAdd" value="提交留言" />
</fieldset>
}
</div>
</body>
</html>
方式二:直接在MODEL层里添加上验证
如何把数据验证交给Model呢？这里需要引用一个DLL：System.ComponentModel.DataAnnotations
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Text; namespace Package.Model
{
/// <summary>
/// Message:实体类(属性说明自动提取数据库字段的描述信息)
/// </summary> [Serializable]
public partial class Message
{
public Message()
{ }
#region Model
private int _id;
private string _gname;
private string _gcontent; public int Id
{
set { _id = value; }
get { return _id; }
} [DisplayName("姓名")]
[Required(AllowEmptyStrings = false, ErrorMessage = "姓名不能为空")]
public string gName
{
set { _gname = value; }
get { return _gname; }
} [Required(AllowEmptyStrings = false, ErrorMessage = "内容不能为空")]
public string gContent
{
set { _gcontent = value; }
get { return _gcontent; }
}
#endregion Model }
}
更多在MODEL里验证的丰富示例：
namespace MvcApplication4.Models
{
public class UserInfo
{
//ID编号
[ScaffoldColumn(false)]
[Required(AllowEmptyStrings = false, ErrorMessage = "用户ID不能为空")]
[Display(Name = "记录编号", Order = )]
public int ID { get; set; } [Display(Order = )]
[Required(AllowEmptyStrings = false, ErrorMessage = "用户名不能为空")]
[StringLength(, MinimumLength = , ErrorMessage = "用户名不能大于{2} 且要小于{1}")]
[Remote("User", "Validate", HttpMethod = "post", ErrorMessage = "用户名已经存在")]
public string UserName { get; set; } [Display(Name="password")]
[DataType(DataType.Password)]
[Required(AllowEmptyStrings = false, ErrorMessage = "密码不能为空")]
[StringLength(, MinimumLength = , ErrorMessage = "密码必须在{2} 和{1}之间")]
public string UserPassword { get; set; } [Required(AllowEmptyStrings = false, ErrorMessage = "邮箱必填")]
[RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9]+\.[A-Za-z]{2,4}", ErrorMessage = "{0}的格式不正确")]
public string Email { get; set; } [Compare("Email", ErrorMessage = "邮箱要相同")]
public string TEmail { get; set; } //compare 大小写要相同 否则不会触发 验证 [Display(Name = "身份证号码")]
[RegularExpression(@"\d{17}[\d|x]|\d{15}", ErrorMessage = "身份证号码格式错误")]
public string IdentityNo { get; set; } [Required(AllowEmptyStrings = false, ErrorMessage = "年龄必填")]
[Range(, , ErrorMessage = "年龄不能大于{2} 不能小于{1}")]
public int Age { get; set; } [ReadOnly(true)]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:c}")]
[Required(ErrorMessage = "金额不能为空")]
[Range(typeof(decimal), "20.0", "30.0", ErrorMessage = "金额在{1}和{2}之间")]
public decimal Money { get; set; }
}
}
参考文章：http://www.cnblogs.com/jiagoushi/archive/2013/01/25/2876725.html