关于Mvc验证的

1:

[Required(ErrorMessage = "Please enter your name")]
public string Name { get; set; }

[Required(ErrorMessage = "Please enter your email address")]
[RegularExpression(".+\\@.+\\..+",
ErrorMessage = "Please enter a valid email address")]
public string Email { get; set; }

[Required(ErrorMessage = "Please specify whether you'll attend")]
public bool? WillAttend { get; set; }

[Display(Name = "Release Date")]

[DataType(DataType.Date)]

[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode =

true)] //该 ApplyFormatInEditMode 设置指定了当值进行编辑显示在一个文本框中
public DateTime ReleaseDate { get; set; }

[RegularExpression(@"^[A-Z]+[a-zA-Z''-'\s]*$")]
[Required]

[StringLength(60, MinimumLength = 3)]

public string Genre { get; set; }

 2:验证的顺序

 

 

 

 

现在客户端验证，

[HttpPost]
public ActionResult Send(MessageModel model)
{
if (string.IsNullOrEmpty(model.From))
{
ModelState.AddModelError("From", "The From field is required");
}

if (string.IsNullOrEmpty(model.Message))
{
ModelState.AddModelError("Message", "The Message field is required.");
}
if (ModelState.IsValid)
{
return RedirectToAction("ThankYou");
}
ModelState.AddModelError("", "One or more errors were found");
return View(model);

然后进入服务器端验证

我们也可以创建自己的验证Creating Custom Data Annotations

To create a custom annotation, you need to create a class that inherits from ValidationAttribute, and the name
of that class must end with the suffix Attribute.

实例：我们创建一个

As an example, suppose you want to validate that the name entered
in the From field is a full name (contains a first name and last name)

//类的名称必须以Attribute结尾
public class FullNameAttribute:ValidationAttribute
{
//Override the method IsValid
public override bool IsValid(object value)
{
var nameComponents = value.ToString().Split(' ');
return nameComponents.Length == 2;
}
}

在model中使用：

[FullName(ErrorMessage="Please type your full name")]