c#通过GET/POST获取页面的代码
时间：2010-09-08 来源：sunfny
c#通过GET/POST获取页面的代码
| 001 | /// <summary> |
| 002 | /// 提供web处理方法的类 |
| 003 | /// </summary> |
| 004 | public class WebTreatment |
| 005 | { |
| 006 | /// <summary> |
| 007 | /// 通过GET方式获取页面的方法 |
| 008 | /// </summary> |
| 009 | /// <param name="urlString">请求的URL</param> |
| 010 | /// <param name="encoding">页面编码</param> |
| 011 | /// <returns></returns> |
| 012 | public static string GetHtmlFromGet(string urlString, Encoding encoding) |
| 013 | { |
| 014 | //定义局部变量 |
| 015 | HttpWebRequest httpWebRequest = null; |
| 016 | HttpWebResponse httpWebRespones = null; |
| 017 | Stream stream = null; |
| 018 | string htmlString = string.Empty; |
| 019 |
| 020 | //请求页面 |
| 021 | try |
| 022 | { |
| 023 | httpWebRequest = WebRequest.Create(urlString) as HttpWebRequest; |
| 024 | } |
| 025 | //处理异常 |
| 026 | catch (Exception ex) |
| 027 | { |
| 028 | throw new Exception("建立页面请求时发生错误！", ex); |
| 029 | } |
| 030 | httpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; Maxthon 2.0)"; |
| 031 | //获取服务器的返回信息 |
| 032 | try |
| 033 | { |
| 034 | httpWebRespones = (HttpWebResponse)httpWebRequest.GetResponse(); |
| 035 | stream = httpWebRespones.GetResponseStream(); |
| 036 | } |
| 037 | //处理异常 |
| 038 | catch (Exception ex) |
| 039 | { |
| 040 | throw new Exception("接受服务器返回页面时发生错误！", ex); |
| 041 | } |
| 042 | StreamReader streamReader = new StreamReader(stream,encoding); |
| 043 | //读取返回页面 |
| 044 | try |
| 045 | { |
| 046 | htmlString = streamReader.ReadToEnd(); |
| 047 | } |
| 048 | //处理异常 |
| 049 | catch (Exception ex) |
| 050 | { |
| 051 | throw new Exception("读取页面数据时发生错误！", ex); |
| 052 | } |
| 053 | //释放资源返回结果 |
| 054 | streamReader.Close(); |
| 055 | stream.Close(); |
| 056 | return htmlString; |
| 057 | } |
| 058 |
| 059 | /// <summary> |
| 060 | /// 提供通过POST方法获取页面的方法 |
| 061 | /// </summary> |
| 062 | /// <param name="urlString">请求的URL</param> |
| 063 | /// <param name="encoding">页面使用的编码</param> |
| 064 | /// <param name="postDataString">POST数据</param> |
| 065 | /// <returns>获取的页面</returns> |
| 066 | public static string GetHtmlFromPost(string urlString, Encoding encoding, string postDataString) |
| 067 | { |
| 068 | //定义局部变量 |
| 069 | CookieContainer cookieContainer = new CookieContainer(); |
| 070 | HttpWebRequest httpWebRequest = null; |
| 071 | HttpWebResponse httpWebResponse = null; |
| 072 | Stream inputStream = null; |
| 073 | Stream outputStream = null; |
| 074 | StreamReader streamReader = null; |
| 075 | string htmlString = string.Empty; |
| 076 | //转换POST数据 |
| 077 | byte[] postDataByte = encoding.GetBytes(postDataString); |
| 078 | //建立页面请求 |
| 079 | try |
| 080 | { |
| 081 | httpWebRequest = WebRequest.Create(urlString) as HttpWebRequest; |
| 082 | } |
| 083 | //处理异常 |
| 084 | catch (Exception ex) |
| 085 | { |
| 086 | throw new Exception("建立页面请求时发生错误！", ex); |
| 087 | } |
| 088 | //指定请求处理方式 |
| 089 | httpWebRequest.Method = "POST"; |
| 090 | httpWebRequest.KeepAlive = false; |
| 091 | httpWebRequest.ContentType = "application/x-www-form-urlencoded"; |
| 092 | httpWebRequest.CookieContainer = cookieContainer; |
| 093 | httpWebRequest.ContentLength = postDataByte.Length; |
| 094 | //向服务器传送数据 |
| 095 | try |
| 096 | { |
| 097 | inputStream = httpWebRequest.GetRequestStream(); |
| 098 | inputStream.Write(postDataByte, 0, postDataByte.Length); |
| 099 | } |
| 100 | //处理异常 |
| 101 | catch (Exception ex) |
| 102 | { |
| 103 | throw new Exception("发送POST数据时发生错误！", ex); |
| 104 | } |
| 105 | finally |
| 106 | { |
| 107 | inputStream.Close(); |
| 108 | } |
| 109 | //接受服务器返回信息 |
| 110 | try |
| 111 | { |
| 112 | httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse; |
| 113 | outputStream = httpWebResponse.GetResponseStream(); |
| 114 | streamReader = new StreamReader(outputStream, encoding); |
| 115 | htmlString = streamReader.ReadToEnd(); |
| 116 | } |
| 117 | //处理异常 |
| 118 | catch (Exception ex) |
| 119 | { |
| 120 | throw new Exception("接受服务器返回页面时发生错误！", ex); |
| 121 | } |
| 122 | finally |
| 123 | { |
| 124 | streamReader.Close(); |
| 125 | } |
| 126 | foreach (Cookie cookie in httpWebResponse.Cookies) |
| 127 | { |
| 128 | cookieContainer.Add(cookie); |
| 129 | } |
| 130 | return htmlString; |
| 131 | } |
| 132 | } |
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