Question

我正在使用我的MVC模型中的Remote属性进行远程验证，请找到以下代码：

[Required]
[System.Web.Mvc.Remote("IsEmailExist", "Account", HttpMethod = "POST", ErrorMessage = "The Email Already Exists")]

在控制器动作方法中，我使用电子邮件的用户输入作为参数并检查数据库，请找到以下代码：

public JsonResult IsEmailExist(string emailAddress)
{
    using  (var db = new YouTubeNZ())                                                
    { 
        var isExist = !db.Users.Any(X => X.EmailAddress == emailAddress);                                         
        return Json(isExist, JsonRequestBehavior.AllowGet);                                                 
    }
}

但是在运行时，action方法中的参数是＆＃34; Null＆＃34;当值应该是用户输入的电子邮件地址时，并且未对现有电子邮件进行验证。

Answer 1

确保使用HttpPost attr修饰您的操作方法，并且您的属性名称与方法参数匹配（即：EmailAddress）：

[HttpPost]
public JsonResult IsEmailExist(string emailAddress)
{
    using  (var db = new YouTubeNZ())                                                
    { 
        var isExist = !db.Users.Any(X => X.EmailAddress == emailAddress);                                         
        return Json(isExist, JsonRequestBehavior.AllowGet);                                                 
    }
}

Answer 2

请确保以下内容。

您的模型属性应该像

[Required]
[System.Web.Mvc.Remote("IsEmailExist", "Account", ErrorMessage = "The Email Already Exists")]
public string EmailAddress { get; set; }

同时将AccountsController操作方法更改为

public ActionResult IsEmailExist(string emailAddress)
{
    using  (var db = new YouTubeNZ())                                                
    { 
        bool isExist = !db.Users.Any(X => X.EmailAddress == emailAddress);                                         
        return Json(isExist, JsonRequestBehavior.AllowGet);                                                 
    }
}

Answer 3

Your Model should be like this

[Required]
[Remote("IsEmailExist","Account",ErrorMessage="This Email is already exists")]
public string EmailAddress{get;set;}

And Controller should be like this

public JsonResult IsEmailExist(string emailAddress)
{
    return Json(isExist(emailAddress),JsonRequestBehavior.AllowGet);
}

private bool isExist(string emailAddress)
{
     using  (var db = new YouTubeNZ())                                                
     { 
        return  !db.Users.Any(X => X.EmailAddress == emailAddress); 
     }
}

模型视图远程验证

3 个答案: