从 .NET 控制台调用 JSON WebService 的最佳方式 [英] Best way to call a JSON WebService from a .NET Console

问题描述

我在 ASP.Net MVC3 中托管一个 Web 服务，它返回一个 Json 字符串.从 c# 控制台应用程序调用 web 服务并将返回解析为 .NET 对象的最佳方法是什么?

I am hosting a web service in ASP.Net MVC3 which returns a Json string. What is the best way to call the webservice from a c# console application, and parse the return into a .NET object?

我应该在我的控制台应用程序中引用 MVC3 吗?

Should I reference MVC3 in my console app?

Json.Net 有一些很好的方法来序列化和反序列化 .NET 对象，但我没有看到它有从网络服务 POST 和 GET 值的方法.

Json.Net has some nice methods for serializing and deserializing .NET objects, but I don't see that it has ways for POSTing and GETing values from a webservice.

或者我应该创建自己的辅助方法来发布和获取网络服务?我如何将我的 .net 对象序列化为键值对?

Or should I just create my own helper method for POSTing and GETing to the web service? How would I serialize my .net object to key value pairs?

推荐答案

我使用 HttpWebRequest 从 Web 服务获取 GET，它返回一个 JSON 字符串.对于 GET，它看起来像这样:

I use HttpWebRequest to GET from the web service, which returns me a JSON string. It looks something like this for a GET:

// Returns JSON string
string GET(string url) 
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    try {
        WebResponse response = request.GetResponse();
        using (Stream responseStream = response.GetResponseStream()) {
            StreamReader reader = new StreamReader(responseStream, System.Text.Encoding.UTF8);
            return reader.ReadToEnd();
        }
    }
    catch (WebException ex) {
        WebResponse errorResponse = ex.Response;
        using (Stream responseStream = errorResponse.GetResponseStream())
        {
            StreamReader reader = new StreamReader(responseStream, System.Text.Encoding.GetEncoding("utf-8"));
            String errorText = reader.ReadToEnd();
            // log errorText
        }
        throw;
    }
}

然后我使用 JSON.Net 来动态解析字符串.或者，您可以使用此 codeplex 工具从示例 JSON 输出静态生成 C# 类:http://jsonclassgenerator.codeplex.com/

I then use JSON.Net to dynamically parse the string. Alternatively, you can generate the C# class statically from sample JSON output using this codeplex tool: http://jsonclassgenerator.codeplex.com/

POST 看起来像这样:

POST looks like this:

// POST a JSON string
void POST(string url, string jsonContent) 
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    request.Method = "POST";

    System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
    Byte[] byteArray = encoding.GetBytes(jsonContent);

    request.ContentLength = byteArray.Length;
    request.ContentType = @"application/json";

    using (Stream dataStream = request.GetRequestStream()) {
        dataStream.Write(byteArray, 0, byteArray.Length);
    }
    long length = 0;
    try {
        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) {
            length = response.ContentLength;
        }
    }
    catch (WebException ex) {
        // Log exception and throw as for GET example above
    }
}

我在我们的网络服务的自动化测试中使用这样的代码.

I use code like this in automated tests of our web service.

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