在WinRT HttpClient上设置请求Content-Type

Question

我正在使用C#和.NET Framework 4.5.1开发Windows 8.1 Store应用程序.

我正在尝试对REST API执行POST,但是我使用以下代码获得了不支持的媒体类型:

public async Task<HttpResponseMessage> POST(string url, string jsonContent)
{
    Uri resourceUri;

    resourceUri = ValidateUri(url);

    HttpClient httpClient = new HttpClient();
    HttpResponseMessage response = new HttpResponseMessage();

    HttpRequestHeaderCollection headers = httpClient.DefaultRequestHeaders;

    // Try to add user agent to headers.
    if (headers.UserAgent.TryParseAdd(_userAgent))
        headers.UserAgent.ParseAdd(_userAgent);

    // Add Content-Type and Content-Length headers
    headers.Accept.Add(new HttpMediaTypeWithQualityHeaderValue("application/json"));

    response = await httpClient.PostAsync(resourceUri, new HttpStringContent(jsonContent));

    return response;
}

如果我更改此行:

response = await httpClient.PostAsync(resourceUri, new HttpStringContent(jsonContent));

有了这个:

response = await httpClient.PostAsync(resourceUri, new HttpStringContent(string.Empty));

有用.我没有获得415状态代码.

jsonContent 价值是:

{"UserName":"My Name","Provider":"Facebook","ExternalAccessToken":"Access token omitted"}

Answer 1

因为我没有在互联网上找到任何类似的代码,我在这个问题上只有4个观点; 我将分享答案.

我已修复此问题,使用以下代码更改帖子:

response = await httpClient.PostAsync(resourceUri,
    new HttpStringContent(jsonContent, UnicodeEncoding.Utf8, "application/json"));

您可以在HttpStringContent构造函数上传递"Content-Type" .更多信息在这里.