WebClient 数据传输

public string WebClientPost(string PostData, string PostUrl, string Type)
{
string postString = PostData;
byte[] postData = Encoding.UTF8.GetBytes(postString);//编码，尤其是汉字，事先要看下抓取网页的编码方式
string url = PostUrl;//地址
WebClient webClient = new WebClient();
byte[] responseData = null;
if (Type == "post")
{
webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可
responseData = webClient.UploadData(url, "POST", postData);//得到返回字符流
}
else
{
responseData = webClient.UploadData(url, "GET", postData);//得到返回字符流
}
string srcString = Encoding.UTF8.GetString(responseData);//解码
return srcString;
}

string _Result = PostData(Appid, AppKey, imgSrc, "", "post");
JObject jsonData = JObject.Parse(_Result);
JArray jsonFace = jsonData.GetValue("face") as JArray;
if (jsonFace == null)
{
msg = "err" + "," + "格式不对";
}
else
{ int height = ;
int width = ;
int center_x = ;
int center_y = ;
string sex = "";
if (jsonFace != null && jsonFace.Count > )
{
height = int.Parse(jsonFace[]["position"]["height"].ToString());
width = int.Parse(jsonFace[]["position"]["width"].ToString());
center_x = int.Parse(jsonFace[]["position"]["center"]["x"].ToString());
center_y = int.Parse(jsonFace[]["position"]["center"]["y"].ToString());
sex = jsonFace[]["attribute"]["gender"].ToString();
}
}

Dictionary<string, object> objJson = JsonConvert.DeserializeObject<Dictionary<string, object>>(request);
string state = objJson["state"].ToString();

string imgSrc = context.Request.Form["ImgUrl"].ToString(); //服务器连接 string FileDir = "/PublicResource/";
string AppName = System.Configuration.ConfigurationManager.AppSettings["AppName"]; if (!string.IsNullOrEmpty(AppName))
{
FileDir = "/PublicResource/" + AppName + "/";
}
Guid NewId = Guid.NewGuid();
WebClient wc = new WebClient();
string WXPath = context.Server.MapPath(FileDir + NewId.ToString() + ".jpg");
wc.DownloadFile(imgSrc, WXPath);