ASP.NET技巧:请求网址并解析返回的html

王朝asp·作者佚名  2006-11-24
窄屏简体版  字體: |||超大  

目的,把远程服务器传回的Html,解析到类里面,为GridView等提供数据源

1 、向远程服务器Post数据

public int PostData(string url, string data, out string info)

{

info = "";

CookieContainer cc = new CookieContainer();

HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

request.CookieContainer = cc;

request.Method = "POST";

request.ContentType = "application/x-www-form-urlencoded";

Stream requestStream = request.GetRequestStream();

byte[] byteArray = Encoding.UTF8.GetBytes(data);

requestStream.Write(byteArray, 0, byteArray.Length);

requestStream.Close();

HttpWebResponse response = request.GetResponse() as HttpWebResponse;

Uri responseUri = response.ResponseUri;

Stream receiveStream = response.GetResponseStream();

Encoding encode = System.Text.Encoding.GetEncoding("utf-8");

StreamReader readStream = new StreamReader(receiveStream, encode);

string result = readStream.ReadToEnd();

info = result;

return 0;

}

2、解析返回的html,有省略

public ClassInfo[] GetClass(string html)

{

ArrayList ar = new ArrayList();

ArrayList arr = new ArrayList();

string table = "";

Regex regtable = new Regex(@"(?<=<table.*>).*?(?=</table>)", RegexOptions.Singleline);

Match ma = regtable.Match(html);

while (ma.Success)

{

if (ma.Value.Trim() != "")

{

arr.Add(HttpUtility.HtmlDecode(ma.Value));

}

ma = ma.NextMatch();

}

for (int i = 0; i < arr.Count; i++)

{

table = arr[i].ToString() + table;

}

Regex reg = new Regex(@"(?<=<.*?>).*?(?=<.*?>)", RegexOptions.Singleline);

Match m = reg.Match(table);

while (m.Success)

{

if (m.Value.Trim() != "")

{

ar.Add(HttpUtility.HtmlDecode(m.Value));

}

m = m.NextMatch();

}

ClassInfo[] ci = new ClassInfo[classno];

for (int i = 0; i < classno; i++)

{

ci[i] = new ClassInfo();

ci[i].RegisterDate = (ar[i * 8 + 0]).ToString();

ci[i].LoginDate = (ar[i * 8 + 1]).ToString();

ci[i].LogoutDate = (ar[i * 8 + 2]).ToString();

ci[i].UseMin = ar[i * 8 + 3].ToString();

ci[i].ClassName = ar[i * 8 + 5].ToString();

ci[i].ClassType = ar[i * 8 + 6].ToString();

ci[i].Percent = ar[i * 8 + 7].ToString();

}

return ci;

}

3、定义ClassInfo类(课程类),用CodeSmith生成

public class ClassInfo

{

Member Variables#region Member Variables

protected string _loginDate;

protected string _logoutDate;

protected string _registerDate;

protected string _useMin;

protected string _className;

protected string _classType;

protected string _percent;

//protected string _nouse;

#endregion

Constructors#region Constructors

public ClassInfo() { }

public ClassInfo(string loginDate, string logoutDate,

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