ASP .NET MVC 3 - RemoteAttribute覆盖IsValid的，获得了额外的字段 [英] ASP .NET MVC 3 - RemoteAttribute override IsValid, access to the additional fields

问题描述

伙计们，我创建一个新的属性，它inhetirs从System.Web.Mvc.RemoteAttribute。我想重写方法IsValid为验证也适用，而不启用JavaScript。但我不知道我可以存取权限的其他字段。我的code是：

  [AttributeUsage（AttributeTargets.Property）
公共类DocumentationAttribute：System.Web.Mvc.RemoteAttribute
{
    公共DocumentationAttribute（）
        ：基地（ValidPass，验证）
    {
        base.HttpMethod =邮报;
    }
    私人DocumentationAttribute（字符串routeName）
        ：基地（routeName）
    {

    }
    私人DocumentationAttribute（串动，串器）
        ：基座（动作，控制器）
    {

    }
    私人DocumentationAttribute（串动，串控制器，串AREANAME）
        ：基地（动作，控制器，AREANAME）
    {

    }

    公众覆盖布尔的IsValid（对象的值）
    {
        //我如何可以访问到更多的领域？
    }}
 

类模型：

  [显示（名称为护照）
        [文件（的ErrorMessage ={0}无效，AdditionalFields =IDPass）
        公共虚拟字符串护照
        {
            组;
            得到;
        }
 

解决方案

没有JavaScript的你不能这样做远程验证。这就是它是如何工作的。你可能也仅仅只依靠服务器端验证，因为这是唯一一种验证的工作没有JavaScript的。

您想创建一个远程工作的JavaScript的验证，但确实服务器端，如果禁用JavaScript？如果是这样，那么你应该创建一个从ValidationAttribute派生的自定义属性，并使用远程的。

针对您的问题，您需要创建在名为属性AdditionalFields一个公共属性，这个ID在初始设置时申报财产，那么你可以从你的IsValid访问属性。

编辑：

根据您的更多信息，你需要使用的IsValid的第二种形式，是以验证环境。你会做这样的事情：

 保护覆盖的ValidationResult的IsValid（对象的值，ValidationContext validationContext）
{
    VAR栏= validationContext.ObjectType.GetProperty（this.AdditionalFields）;
    VAR fieldsValue =（字符串）fields.GetValue（validationContext.ObjectInstance，NULL）;
}
 

Folks, i am creating a new attribute which inhetirs from System.Web.Mvc.RemoteAttribute. I would like to override the method IsValid for that the validation also works without the enabled JavaScript. But i don't know how i can acces to the additional fields. My code is:

[AttributeUsage(AttributeTargets.Property)]
public class DocumentationAttribute : System.Web.Mvc.RemoteAttribute
{
    public DocumentationAttribute()
        : base("ValidPass", "Validation")
    {
        base.HttpMethod = "Post";
    }
    private DocumentationAttribute(string routeName)
        : base(routeName)
    {

    }
    private DocumentationAttribute(string action, string controller)
        : base(action, controller)
    {

    }
    private DocumentationAttribute(string action, string controller, string areaName)
        : base(action, controller, areaName)
    {

    }

    public override bool IsValid(object value)
    {
        //How can i access to the additional fields?
    }}

Class Model:

        [Display(Name = "Passport")]
        [Documentation(ErrorMessage = "{0} not valid", AdditionalFields = "IDPass")]
        public virtual String Passport
        {
            set;
            get;
        }

解决方案

You can't do remote validation without javascript. That's how it works. You might as well just rely on server-side validation only, because that's the only kind of validation that works without javascript.

Are you trying to create a validator that works remotely with javascript, but does serverside if javascript is disabled? If so, then you should create a custom attribute derived from ValidationAttribute, and use remote as well.

Specifically for your question, you need to create a public property in your attribute called AdditionalFields, this gets set in the initializer when you declare the property, then you can access the property from your IsValid.

EDIT:

Based on your additional information, you need to use the second form of IsValid that takes the validation context. You would do something like this:

protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
    var fields = validationContext.ObjectType.GetProperty(this.AdditionalFields);
    var fieldsValue = (string)fields.GetValue(validationContext.ObjectInstance, null);
}

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