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进行POST,但使用以下代码却得到了不受支持的媒体类型:

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。我没有得到415状态代码。

jsonContent值为:

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

最佳答案

因为我没有在Internet上找到任何类似的代码,所以我对这个问题只有4个观点。我将分享答案。

我已经解决了使用以下代码更改帖子的问题:

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here

09-03 17:25