比如我输入的短链接是 

http://wx.smartoct.com/News/GuessNews?ImageTextID=b9e669ba-adaf-4fd2-930a-502e66633685&User_ID=622a17d7-355a-4d59-af18-416c3bfba132

调用百度api后返回的结果就是

{"tinyurl":"http:\/\/dwz.cn\/1FakzE","status":0,"longurl":"http://wx.smartoct.com/News/GuessNews?ImageTextID=b9e669ba-adaf-4fd2-930a-502e66633685","err_msg":""}

调用sina的之后结果也是

​[{"url_short":"http://t.cn/RyLFTSW","url_long":"http://wx.smartoct.com/News/GuessNews?ImageTextID=b9e669ba-adaf-4fd2-930a-502e66633685","type":0}]

都移除了&后面的参数,不知道这是为什么

这里详细给出sinaapi的写法,供大神测试

public class GetShortUrl
{
public static string GetSina(string urlLong)
{
var result = "";
try
{
string url = "http://api.t.sina.com.cn/short_url/shorten.json?source=1681459862&url_long=" + urlLong;
string jsonstring = NetworkHelper.SendRequest(url);
if (jsonstring.Contains("url_short"))
{
result =
JsonConvert.DeserializeObject<System.Collections.Generic.List<SinaShortUrl>>(
jsonstring.Replace("\r\n", ""))[0].url_short;
}
}
catch (Exception)
{

}
return result;
}
}

public static class NetworkHelper
{
/// <summary>
/// 向服务器发送请求并返回请求结果
/// </summary>
/// <param name="url">请求url</param>
/// <returns>返回Response结果</returns>
public static string SendRequest(string url)
{
string data = string.Empty;
WebRequest wreq = null;
WebResponse wrep = null;
Stream stream = null;
StreamReader reader = null;
try
{
wreq = WebRequest.Create(url);
wrep = wreq.GetResponse();
stream = wrep.GetResponseStream();
reader = new StreamReader(stream, System.Text.Encoding.UTF8);
data = reader.ReadToEnd();
}
catch (Exception)
{
//throw;
}
finally
{
if (reader != null) reader.Dispose();
if (stream != null) stream.Dispose();
if (wrep != null) wrep.Dispose();
if (wreq != null) wreq.Abort();
}
return data;
}

}