windows-runtime - 如何使用 HttpClient 在一个请求中发布字符串和图像？

Question

我有一个字符串和一个图像，我需要使用Windows 运行时中的HttpClientPOST到 Web 服务器。

如何使用HttpClient在一个请求中发布两件事？

Answer 1

简单的！尝试这个：

using Windows.Web.Http;
using Windows.Web.Http.Headers;

private async void Foo()
{
    // the image
    var fileStream = await file.OpenReadAsync();
    var streamContent = new HttpStreamContent(fileStream);
    var filename = "myImage.png";

    // the text
    var text = "oompa loompas";
    var stringContent = new HttpStringContent(text);

    // Putting all together.
    var formDataContent = new HttpMultipartFormDataContent();
    formDataContent.Add(streamContent, "myImage", fileName);
    formDataContent.Add(stringContent, "myString");

    // Send it to the server.
    var response = await (new HttpClient()).PostAsync(uri, formDataContent);
}

Answer 2

用于发布字符串

HttpClient client = new HttpClient();
HttpContent content = new StringContent(contentstring);
client.PostAsync(url, content);

对于发布图像，将图像转换为流，流转换为字符串，然后是 httpcontent。