asp.net下获取远程网页的内容之二（downmoon原创）

private string strFireWallIP 
...{ 
get 
...{ 
return System.Configuration.ConfigurationSettings.AppSettings["strFireWallIP"]; 
} 
} 
private string strFireWallPort 
...{ 
get 
...{ 
return System.Configuration.ConfigurationSettings.AppSettings["strFireWallPort"]; 
} 
} 
private string strUID 
...{ 
get 
...{ 
return System.Configuration.ConfigurationSettings.AppSettings["strUID"]; 
} 
} 
private string strPWD 
...{ 
get 
...{ 
return System.Configuration.ConfigurationSettings.AppSettings["strPWD"]; 
} 
} 
private string strDomain 
...{ 
get 
...{ 
return System.Configuration.ConfigurationSettings.AppSettings["strDomain"]; 
} 
} 
#endregion 

/**//// <summary> 
/// 获取指定远程网页内容 
/// </summary> 
/// <param name="strUrl">所要查找的远程网页地址</param> 
/// <returns></returns> 
//[WebMethod(Description = "获取指定远程网页内容。")] 
public string getPageContent(string strUrl) 
...{ 
string strResult = ""; 
this.CurrentUrl = strUrl; 
if(this.CurrentUrl.ToLower().StartsWith("http://")==false) 
this.CurrentUrl = "http://"+this.CurrentUrl; 
try 
...{ 
contentBytes = GetHtmlByte(CurrentUrl); 
} 
catch(Exception err) 
...{ 
strResult = "请求错误：" + err.Message; 
} 
if(contentBytes==null) 
...{ 
throw new Exception("没有获得返回值"); 
} 
strResult = getStringFromByteArray(contentBytes,Encoding.UTF8); 
return strResult; 
} 

/**//// <summary> 
/// 获取指定远程网页元素字节数组 
/// </summary> 
/// <param name="strUrl">所要查找的远程网页地址</param> 
/// <returns></returns> 
private byte[] GetHtmlByte(string strUrl) 
...{ 
string strPara=(strUrl.IndexOf("?")>=0?strUrl.Substring(strUrl.IndexOf("?")+1):""); 
System.Text.Encoding encoding = new UTF8Encoding(); 
byte[] byte1 = encoding.GetBytes(strPara); 
byte[] byteReturn = new byte[10000000]; 
if(strUrl.Trim().ToLower().StartsWith("http://")==false) 
...{ 
strUrl = "http://"+strUrl; 
} 
HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strUrl); 
myHttpWebRequest.AllowAutoRedirect = true; 
myHttpWebRequest.KeepAlive = true; 
myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)"; 
System.Net .WebProxy proxy = new WebProxy(strFireWallIP+":"+strFireWallPort,true); 
//proxy=(WebProxy)System.Net.GlobalProxySelection.Select; 
System.Net.NetworkCredential myCredential = new NetworkCredential(strUID,strPWD,strDomain); 
proxy.Credentials =myCredential; 
myHttpWebRequest.Proxy = proxy; 
HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse(); 
byte[] bRead = new byte[1024]; 
int lngCount = 1; 
int totalLen = 0; 
Stream recWeb = myHttpWebResponse.GetResponseStream(); 
lngCount = recWeb.Read(bRead,0,1024); 
while(lngCount>0) 
...{ 
Array.Copy(bRead,0,byteReturn,totalLen,lngCount); 
totalLen += lngCount; 
lngCount = recWeb.Read(bRead,0,1024); 
} 
recWeb.Close(); 
byte[] byteGets = new byte[totalLen]; 
Array.Copy(byteReturn,0,byteGets,0,totalLen); 
byteReturn = null; 
bRead = null; 
return byteGets; 
} 
#endregion 

/**//// <summary> 
/// 转换指定字节数组为字符串 
/// </summary> 
/// <param name="ByteGet">字节数组Byte[]</param> 
/// <param name="myEncoding">编码方式</param> 
/// <returns></returns> 
private static string getStringFromByteArray(Byte[] ByteGet,Encoding myEncoding) 
...{ 
int i,lngCount; 
StringBuilder aTemp = new StringBuilder(10000); 
lngCount = ByteGet.Length; 
for(i = 0;i<lngCount;i+= 10000) 
...{ 
aTemp.Append(myEncoding.GetString(ByteGet,i,(lngCount>=i+10000?10000:lngCount - i))); 
} 
if(i<=lngCount) 
...{ 
aTemp.Append(myEncoding.GetString(ByteGet,i,(lngCount - i))); 
} 
return aTemp.ToString(); 
} 
#endregion