C＃从NameValueCollection中发布值

Question

如何获取NameValueCollection值的POST的Content-Length？

我正在添加“Content-Length”标题，但不知道该放入什么内容。

public static string Post (string url, NameValueCollection formData)
{
    string response;
    int length = formData.???

    using (WebClient webClient = new WebClient())
    {
        webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        webClient.Headers.Add ("Content-Length", length);
        byte[] responseBytes = webClient.UploadValues (url, "POST", formData);
        response = Encoding.UTF8.GetString (responseBytes);
    }

    return response;
}

Answer 1

您无法在WebClient上设置该属性