如何访问所有查询字符串参数作为一个字典 [英] How to access all querystring parameters as a dictionary

问题描述

我有一些动态的查询字符串参数，我想与为的IDictionary＆LT交互;字符串，字符串＆GT; 。我该怎么做呢？

I have some dynamic querystring parameters that I would like to interact with as an IDictionary<string,string>. How do I do this?

我试过

public IHttpActionResult Get(FromUri]IDictionary<string, string> selections)

<一个href=\"http://www.hanselman.com/blog/ASPNETWireFormatForModelBindingToArraysListsCollectionsDictionaries.aspx\">as建议但对于查询

/api/MyController?selections%5Bsub-category%5D=kellogs

它总是给我0项的字典。

it always gives me a dictionary with 0 items.

我甚至都不需要选 preFIX。我真的只是需要的所有查询字符串参数作为一个字典。我如何做到这一点，为什么不将上述工作？

I don't even need the selections prefix. I literally just need all querystring parameters as a dictionary. How do I do this and why won't the above work?

推荐答案

您可以使用<$c$c>GetQueryNameValuePairs在扩展方法中的的Htt prequestMessage 来得到解析的查询字符串键值对的集合。

You can use the GetQueryNameValuePairs extension method on the HttpRequestMessage to get the parsed query string as a collection of key-value pairs.

public IHttpActionResult Get()
{
    var queryString = this.Request.GetQueryNameValuePairs();
}

和您可以创建一些进一步的扩展方法，使其eaiser与此处描述的工作：<一href=\"http://weblog.west-wind.com/posts/2013/Apr/15/WebAPI-Getting-Headers-QueryString-and-Cookie-Values\">WebAPI:获得接头，查询字符串和cookie值

And you can create some further extension methods to make it eaiser to work with as described here: WebAPI: Getting Headers, QueryString and Cookie Values

/// <summary>
/// Extends the HttpRequestMessage collection
/// </summary>
public static class HttpRequestMessageExtensions
{
    /// <summary>
    /// Returns a dictionary of QueryStrings that's easier to work with 
    /// than GetQueryNameValuePairs KevValuePairs collection.
    /// 
    /// If you need to pull a few single values use GetQueryString instead.
    /// </summary>
    /// <param name="request"></param>
    /// <returns></returns>
    public static Dictionary<string, string> GetQueryStrings(
        this HttpRequestMessage request)
    {
         return request.GetQueryNameValuePairs()
                       .ToDictionary(kv => kv.Key, kv=> kv.Value, 
                            StringComparer.OrdinalIgnoreCase);
    }
}

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