WebClient编码

Question

当我用Webclient发送请求时，请求字符串被转换为？

我设置了编码，但它不起作用。

这是我的守则：

using (var client = new WebClient(){ Encoding = Encoding.UTF8 })
{
    client.Encoding = ASCIIEncoding.UTF8;
    client.Headers[HttpRequestHeader.ContentType] = "application/octet-stream";
    client.Encoding = Encoding.ASCII;
    client.Headers.Add("user-agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");
    client.Headers.Add("Content-Encoding: UTF-8");

    string credentials = Convert.ToBase64String(Encoding.ASCII.GetBytes("admin" + ":" + "123456"));
    client.Headers[HttpRequestHeader.Authorization] = string.Format("Basic {0}", credentials);
    client.Headers.Add("command:12");

    byte[] bret = client.UploadData("http://192.168.1.1", "POST",
                  System.Text.Encoding.ASCII.GetBytes("code=سلام;field2=value2"));

    string sret = System.Text.Encoding.ASCII.GetString(bret);
    MessageBox.Show(sret);
}

使用Wireshark进行嗅探，请求字符串转换为?？：

POST / HTTP/1.1 授权:基本YWRtaW46MTIzNDU2 命令: setPersons12 内容类型: application/json；charset=utf-8 东道: 192.168.1.21:8080 内容长度: 23 预期:100-继续 连接：“保持活动”代码=？；field2 2=Alive 2HTTP/1.1 200 OK 内容长度: 10 内容-类型: application/json；charset=UTF-8

Answer 1

尝试使用这段代码，我希望是有用的。

    using (var client = new WebClient())
        {
            client.Encoding = Encoding.UTF8;
            ....

        }