如何使用C＃[重复]在POST请求中发送json数据

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How to post JSON to a server using C#? 11 answers

如何使用C#将JSON发布到服务器? 11个答案

I want to send json data in POST request using C#.

我想使用C#在POST请求中发送json数据。

I have tried few ways but facing lot of issues . I need to request using request body as raw json from string and json data from json file.

我尝试了很多方法,但面临很多问题。我需要请求使用请求体作为来自字符串的原始json和来自json文件的json数据。

How can i send request using these two data forms.

如何使用这两个数据表单发送请求。

Ex: For authentication request body in json --> {"Username":"myusername","Password":"pass"}

例如:对于json中的身份验证请求正文 - > {“Username”:“myusername”,“Password”:“pass”}

For other APIs request body should retrieved from external json file.

对于其他API请求体应从外部json文件中检索。

4 个解决方案

#1

You can use the HttpClient instead of the WebClient and HttpWebRequest. It's a newer implementation.

您可以使用HttpClient而不是WebClient和HttpWebRequest。这是一个较新的实现。

string myJson = "{'Username': 'myusername','Password':'pass'}";
using (var client = new HttpClient())
{
    var response = await client.PostAsync(
        "http://yourUrl", 
         new StringContent(myJson, Encoding.UTF8, "application/json"));
}

When you need your HttpClient more then once it's recommended to only create one instance and reuse it or use the new HttpClientFactory.

当你需要更多的HttpClient时,建议只创建一个实例并重用它或使用新的HttpClientFactory。

#2

You can do it with HttpWebRequest:

你可以用HttpWebRequest做到这一点:

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://yourUrl");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
    string json = new JavaScriptSerializer().Serialize(new
            {
                Username = "myusername",
                Password = "pass"
            });
    streamWriter.Write(json);
    streamWriter.Flush();
    streamWriter.Close();
}

var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
    var result = streamReader.ReadToEnd();
}

#3

You can use either HttpClient or RestSharp, since i do not know whats ur code here is an example using httpclient :

你可以使用HttpClient或RestSharp,因为我不知道你的代码是什么,这是一个使用httpclient的例子:

using (var client = new HttpClient())
        {
            //This would be the like http://www.uber.com
            client.BaseAddress = new Uri("Base Address/URL Address");
            //serialize your json using newtonsoft json serializer then add it to the StringContent
            var content = new StringContent(YourJson, Encoding.UTF8, "application/json") 
            //method address would be like api/callUber:SomePort for example
            var result = await client.PostAsync("Method Address", content);
            string resultContent = await result.Content.ReadAsStringAsync();

        }

#4

This works for me.

这对我有用。

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://url");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new 

StreamWriter(httpWebRequest.GetRequestStream()))
{
    string json = new JavaScriptSerializer().Serialize(new
                {
                    Username = "myusername",
                    Password = "password"
                });

    streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
    var result = streamReader.ReadToEnd();
}

#1