ASP.NET技巧:请求网址并解析返回的html
ASP.NET技巧:请求网址并解析返回的html
发布时间:2016-12-29 来源:查字典编辑
摘要: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publicintPostData...

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, string registerDate, string useMin, string className, string classType, string percent)

{

this._loginDate = loginDate;

this._logoutDate = logoutDate;

this._registerDate = registerDate;

this._useMin = useMin;

this._className = className;

this._classType = classType;

this._percent = percent;

}

#endregion

Public Properties#region Public Properties

// public string NoUse

// {

// get{return _nouse;}

// set{ _nouse= value;}

// }

public string LoginDate

{

get { return _loginDate; }

set { _loginDate = value; }

}

public string LogoutDate

{

get { return _logoutDate; }

set { _logoutDate = value; }

}

public string RegisterDate

{

get { return _registerDate; }

set { _registerDate = value; }

}

public string UseMin

{

get { return _useMin; }

set { _useMin = value; }

}

public string ClassName

{

get { return _className; }

set

{

if (value != null && value.Length > 50)

throw new ArgumentOutOfRangeException("Invalid value for ClassName", value, value.ToString());

_className = value;

}

}

public string ClassType

{

get { return _classType; }

set

{

if (value != null && value.Length > 50)

throw new ArgumentOutOfRangeException("Invalid value for ClassType", value, value.ToString());

_classType = value;

}

}

public string Percent

{

get { return _percent; }

set

{

if (value != null && value.Length > 50)

throw new ArgumentOutOfRangeException("Invalid value for Percent", value, value.ToString());

_percent = value;

}

}

#endregion

}

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