如何在 Windows Phone 8 的 HttpClient 请求中发送 Post 正文? [英] How to send a Post body in the HttpClient request in Windows Phone 8?

问题描述

我编写了下面的代码来发送标头、发布参数.问题是我使用的是 SendAsync，因为我的请求可以是 GET 或 POST.我如何将 POST Body 添加到这段代码中，以便如果有任何 post body 数据，它会被添加到我发出的请求中，如果它的简单 GET 或 POST 没有正文，它就会以这种方式发送请求.请更新以下代码:

I have written the code below to send headers, post parameters. The problem is that I am using SendAsync since my request can be GET or POST. How can I add POST Body to this peice of code so that if there is any post body data it gets added in the request that I make and if its simple GET or POST without body it send the request that way. Please update the code below:

HttpClient client = new HttpClient();

// Add a new Request Message
HttpRequestMessage requestMessage = new HttpRequestMessage(RequestHTTPMethod, ToString());

// Add our custom headers
if (RequestHeader != null)
{
    foreach (var item in RequestHeader)
    {

        requestMessage.Headers.Add(item.Key, item.Value);

    }
}

// Add request body


// Send the request to the server
HttpResponseMessage response = await client.SendAsync(requestMessage);

// Get the response
responseString = await response.Content.ReadAsStringAsync();

推荐答案

UPDATE 2:

来自@Craig Brown:

从 .NET 5 开始，您可以:
requestMessage.Content = JsonContent.Create(new { Name = "John Doe", Age = 33 });

As of .NET 5 you can do:
requestMessage.Content = JsonContent.Create(new { Name = "John Doe", Age = 33 });

参见 JsonContent 类文档

哦，它可以更好(来自这个答案):

Oh, it can be even nicer (from this answer):

requestMessage.Content = new StringContent("{"name":"John Doe","age":33}", Encoding.UTF8, "application/json");

这取决于你有什么内容.您需要使用新的 HttpContent.例如:

This depends on what content do you have. You need to initialize your requestMessage.Content property with new HttpContent. For example:

...
// Add request body
if (isPostRequest)
{
    requestMessage.Content = new ByteArrayContent(content);
}
...

其中 content 是您编码的内容.您还应该包含正确的 Content-type 标头.

where content is your encoded content. You also should include correct Content-type header.

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