将QueryString解析为强类型对象

问题描述

我知道它可以自动完成；

I know it can be done automatically;

class Query 
{ 
     public int?[] Id { get; set; }
}

public ActionResult Index(Query q)
{
}

一些QueryString /index?id = 10& id = 11

Some QueryString /index?id=10&id=11

它完美无瑕.

但是在某些情况下，我只有可用的请求:

But in some scenario I have only request available:

Reqest.RawUrl

是否可以使用内置解析来创建查询对象?

It is possible to use built-in parsing to create query object?

Query q = SomeMagicStuff<Query>(Request.RawUrl);

推荐答案

是可以的.如果您使用MVC，则可以使用MVC DefaultModelBinder ，我为这种情况编写了一个函数:

Yes it is possible. If you using MVC you can use MVC DefaultModelBinder i write a function for this case:

public class MyModelBinder<T>
{
    private ModelBindingContext modelBindingContext = new ModelBindingContext();

    /// <summary>
    /// Method to get model from QueryString
    /// </summary>
    /// <param name="request">HttpRequest</param>
    /// <returns>T model</returns>
    public static T GetModelFromQueryString(HttpRequest request)
    {
        modelBindingContext.ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(null, typeof(T));
        modelBindingContext.ValueProvider = new NameValueCollectionValueProvider(request.QueryString, System.Globalization.CultureInfo.InvariantCulture);
        IModelBinder mb = new DefaultModelBinder();
        return (T)mb.BindModel(new ControllerContext(), modelBindingContext);
    }

    /// <summary>
    /// Method to get model from FormColletion
    /// </summary>
    /// <param name="request">HttpRequest</param>
    /// <returns>T model</returns>
    public static T GetModelFromFormColletion(HttpRequest request)
    {
        modelBindingContext.ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(null, typeof(T));
        modelBindingContext.ValueProvider = new NameValueCollectionValueProvider(request.Params, System.Globalization.CultureInfo.InvariantCulture);
        IModelBinder mb = new DefaultModelBinder();
        return (T)mb.BindModel(new ControllerContext(), modelBindingContext);
    }
}

请注意，有2种方法.它们仅在 request.Params 和 request.QueryString 上有所不同.

Note that there is 2 methods. They are differ only with request.Params and request.QueryString.

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