WinForm程序访问OpenAP查询快递

上次在看到博客园上有一篇通过winform访问查询快递的OpenAPI文章，没有交待怎么实现，也没有代码，所以自己试了下，通过两种方法成功查询到快递信息。

1,通过 HttpWebRequest和HttpWebResponse

       HttpWebRequest request = HttpWebRequest.Create("http://api.kuaidi100.com/apione" + "?com="+comboBox2.SelectedText+"&nu="+comboBox1.SelectedText+"&show=4") as HttpWebRequest;
             request.Method = "GET";
             request.ContentType = "text/plain";
             HttpWebResponse response = (HttpWebResponse)request.GetResponse();
             Stream stream = response.GetResponseStream();
             StreamReader reader = new StreamReader(stream,System.Text.Encoding.Default);
             string result = reader.ReadToEnd();
             tbresult.Text = result;
             stream.Close();

2,通过WebClient

WebClient client = new WebClient();
             client.DownloadDataCompleted += new DownloadDataCompletedEventHandler(client_DownloadDataCompleted);
             client.Encoding = System.Text.Encoding.UTF8;
             tbresult.Text=client.DownloadString("http://api.kuaidi100.com/apione" + "?com=" + comboBox2.Text + "&nu=" + comboBox1.Text + "&show=3"); 

用WebClinet相对HttpWebRequest和HttpWebResponse来说更简单一些，另外还可以进行异步传输，所以我比较喜欢用WebClient

当然，还可以使用WebBrowser，不过WebBrowser主要用来浏览，这里只是获取数据，就没必要了