c#通过GET/POST获取页面的代码
c#通过GET/POST获取页面的代码
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/// <summary> |
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/// 提供web处理方法的类 |
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/// </summary> |
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public class WebTreatment |
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{ |
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/// <summary> |
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/// 通过GET方式获取页面的方法 |
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/// </summary> |
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/// <param name="urlString">请求的URL</param> |
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/// <param name="encoding">页面编码</param> |
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/// <returns></returns> |
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public static string GetHtmlFromGet(string urlString, Encoding encoding) |
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{ |
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//定义局部变量 |
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HttpWebRequest httpWebRequest = null; |
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HttpWebResponse httpWebRespones = null; |
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Stream stream = null; |
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string htmlString = string.Empty; |
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|
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//请求页面 |
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try |
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{ |
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httpWebRequest = WebRequest.Create(urlString) as HttpWebRequest; |
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} |
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//处理异常 |
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catch (Exception ex) |
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{ |
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throw new Exception("建立页面请求时发生错误！", ex); |
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} |
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httpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; Maxthon 2.0)"; |
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//获取服务器的返回信息 |
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try |
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{ |
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httpWebRespones = (HttpWebResponse)httpWebRequest.GetResponse(); |
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stream = httpWebRespones.GetResponseStream(); |
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} |
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//处理异常 |
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catch (Exception ex) |
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{ |
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throw new Exception("接受服务器返回页面时发生错误！", ex); |
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} |
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StreamReader streamReader = new StreamReader(stream,encoding); |
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//读取返回页面 |
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try |
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{ |
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htmlString = streamReader.ReadToEnd(); |
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} |
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//处理异常 |
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catch (Exception ex) |
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{ |
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throw new Exception("读取页面数据时发生错误！", ex); |
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} |
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//释放资源返回结果 |
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streamReader.Close(); |
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stream.Close(); |
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return htmlString; |
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} |
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|
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/// <summary> |
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/// 提供通过POST方法获取页面的方法 |
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/// </summary> |
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/// <param name="urlString">请求的URL</param> |
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/// <param name="encoding">页面使用的编码</param> |
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/// <param name="postDataString">POST数据</param> |
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/// <returns>获取的页面</returns> |
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public static string GetHtmlFromPost(string urlString, Encoding encoding, string postDataString) |
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{ |
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//定义局部变量 |
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CookieContainer cookieContainer = new CookieContainer(); |
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HttpWebRequest httpWebRequest = null; |
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HttpWebResponse httpWebResponse = null; |
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Stream inputStream = null; |
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Stream outputStream = null; |
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StreamReader streamReader = null; |
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string htmlString = string.Empty; |
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//转换POST数据 |
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byte[] postDataByte = encoding.GetBytes(postDataString); |
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//建立页面请求 |
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try |
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{ |
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httpWebRequest = WebRequest.Create(urlString) as HttpWebRequest; |
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} |
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//处理异常 |
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catch (Exception ex) |
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{ |
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throw new Exception("建立页面请求时发生错误！", ex); |
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} |
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//指定请求处理方式 |
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httpWebRequest.Method = "POST"; |
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httpWebRequest.KeepAlive = false; |
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httpWebRequest.ContentType = "application/x-www-form-urlencoded"; |
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httpWebRequest.CookieContainer = cookieContainer; |
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httpWebRequest.ContentLength = postDataByte.Length; |
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//向服务器传送数据 |
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try |
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{ |
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inputStream = httpWebRequest.GetRequestStream(); |
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inputStream.Write(postDataByte, 0, postDataByte.Length); |
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} |
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//处理异常 |
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catch (Exception ex) |
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{ |
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throw new Exception("发送POST数据时发生错误！", ex); |
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} |
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finally |
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{ |
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inputStream.Close(); |
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} |
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//接受服务器返回信息 |
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try |
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{ |
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httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse; |
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outputStream = httpWebResponse.GetResponseStream(); |
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streamReader = new StreamReader(outputStream, encoding); |
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htmlString = streamReader.ReadToEnd(); |
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} |
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//处理异常 |
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catch (Exception ex) |
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{ |
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throw new Exception("接受服务器返回页面时发生错误！", ex); |
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} |
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finally |
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{ |
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streamReader.Close(); |
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} |
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foreach (Cookie cookie in httpWebResponse.Cookies) |
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{ |
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cookieContainer.Add(cookie); |
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} |
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return htmlString; |
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} |
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} |
