ASP.NET下對cookies的操作實現代碼

public class BsCookie 
{ 
//操作的cookie 
private HttpCookie _theCookie; 
//對應的cookie的名稱 
private string _cookieName; 
private bool _httpOnly = true; 
/// <summary> 
/// 是否只允許在服務器端訪問,默認只允許在服務端訪問 
/// </summary> 
public bool HttpOnly 
{ 
get { return _httpOnly; } 
set { _httpOnly = value; } 
} 
private double _expireMinutes; 
/// <summary> 
/// Cookies有效的存放時間,以分鐘表示 
/// </summary> 
public double ExpireMinutes 
{ 
get { return _expireMinutes; } 
set { _expireMinutes = value; } 
} 
public BsCookie(string name,double expireMinutes) 
{ 
_cookieName = name; 
_expireMinutes = expireMinutes; 
} 
/// <summary> 
/// 讀取對應的cookie 
/// </summary> 
/// <param name="name"></param> 
/// <returns></returns> 
private HttpCookie GetCookieReq() 
{ 
HttpRequest request = HttpContext.Current.Request; 
if (request != null) 
{ 
HttpCookie cookie = request.Cookies[_cookieName]; 
if (cookie != null) 
{ 
return cookie; 
} 
} 
return null; 
} 
/// <summary> 
/// 設置對應的cookie 
/// </summary> 
/// <param name="name"></param> 
/// <returns></returns> 
private HttpCookie GetCookieResponse() 
{ 
HttpResponse response = HttpContext.Current.Response; 
if (response != null) 
{ 
HttpCookie cookie = response.Cookies[_cookieName]; 
if (cookie != null) 
{ 
return cookie; 
} 
} 
return new HttpCookie(_cookieName); 
} 
/// <summary> 
/// 僅設置主鍵的 
/// </summary> 
/// <param name="name"></param> 
/// <param name="value"></param> 
/// <param name="exMinutes"></param> 
public void SetCookie(string value) 
{ 
_theCookie = GetCookieResponse(); 
_theCookie.Value = HttpUtility.HtmlEncode(AllCommon.Encrypt(value)); 
if (Math.Abs(_expireMinutes) > 1) 
{ 
_theCookie.Expires = DateTime.Now.AddMinutes(_expireMinutes); 
} 
_theCookie.HttpOnly = _httpOnly; 
} 
/// <summary> 
/// 設置一組主鍵 
/// </summary> 
/// <param name="name"></param> 
/// <param name="keys"></param> 
/// <param name="exMinutes"></param> 
public void SetCookie(Hashtable keys) 
{ 
_theCookie = GetCookieResponse(); 
foreach (DictionaryEntry de in keys) 
{ 
_theCookie.Values[de.Key.ToString()] = HttpUtility.HtmlEncode(AllCommon.Encrypt(de.Value.ToString())); 
} 
if (Math.Abs(_expireMinutes) > 1) 
{ 
_theCookie.Expires = DateTime.Now.AddMinutes(_expireMinutes); 
} 
_theCookie.HttpOnly = _httpOnly; 
} 
/// <summary> 
/// 獲取單一的cookie主鍵值 
/// </summary> 
/// <param name="name"></param> 
/// <param name="exMinutes">需要延長的cookie的默認時間</param> 
/// <returns></returns> 
public string GetCookie() 
{ 
_theCookie = GetCookieReq(); 
if (_theCookie == null) 
{ 
return string.Empty; 
} 
string thevalue = AllCommon.Decrypt(HttpUtility.HtmlDecode(_theCookie.Value)); 
if (thevalue.Length > 0) 
{ 
HttpCookie serverCookie = GetCookieResponse(); 
if (Math.Abs(_expireMinutes) > 1) 
{ 
serverCookie.Expires = DateTime.Now.AddMinutes(_expireMinutes); 
} 
} 
return thevalue; 
} 
/// <summary> 
/// 獲取一組對應的cookie值 
/// </summary> 
/// <param name="name"></param> 
/// <param name="exMinutes"></param> 
/// <returns></returns> 
public Hashtable GetCookiesKeys() 
{ 
_theCookie = GetCookieReq(); 
if (_theCookie == null) 
{ 
return null; 
} 
string[] keys = _theCookie.Values.AllKeys; 
if (keys.Length > 0) 
{ 
Hashtable keyHash = new Hashtable(); 
foreach (string key in keys) 
{ 
keyHash.Add(key, AllCommon.Decrypt(HttpUtility.HtmlDecode(_theCookie.Values[key]))); 
} 
HttpCookie serverCookie = GetCookieResponse(); 
if (Math.Abs(_expireMinutes) > 1) 
{ 
serverCookie.Expires = DateTime.Now.AddMinutes(_expireMinutes); 
} 
return keyHash; 
} 
return null; 
} 
/// <summary> 
/// 獲取一組里面的單一個值 
/// </summary> 
/// <param name="keyname"></param> 
/// <param name="exMinutes"></param> 
/// <returns></returns> 
public string GetCookieKV(string keyname) 
{ 
_theCookie = GetCookieReq(); 
if (_theCookie == null) 
{ 
return string.Empty; 
} 
string result=AllCommon.Decrypt(HttpUtility.HtmlDecode(_theCookie.Values[keyname])); 
if (result.Length > 0) 
{ 
HttpCookie serverCookie = GetCookieResponse(); 
if (Math.Abs(_expireMinutes) > 1 && serverCookie != null) 
{ 
serverCookie.Expires = DateTime.Now.AddMinutes(_expireMinutes); 
} 
} 
return result; 
} 
} 

演示Asp.Net中對Cookie的基本操作。 
 代碼如下:

Imports System.Web.HttpContext 
Public Class CookieFramework 
'寫入單個Cookie 
Public Shared Function WriteCookie(ByVal CookieName As String, ByVal CookieValue As String, ByVal ExpiresDate As Integer) As Boolean 
Dim aCookie As New HttpCookie(CookieName) 
aCookie.Value = CookieValue 
aCookie.Expires = DateTime.Now.AddDays(ExpiresDate) 
System.Web.HttpContext.Current.Response.Cookies.Add(aCookie) 
End Function 
'給Cookie集合添加子項 
Public Shared Function WriteCookies(ByVal CookieName As String, ByVal CookieItem As String, ByVal ItemValue As String, ByVal ExpiresDate As Integer) As Boolean 
Dim aCookie As HttpCookie 
If Current.Request.Cookies(CookieName) Is Nothing Then 
aCookie = New HttpCookie(CookieName) 
Else 
aCookie = Current.Request.Cookies(CookieName) 
End If 
aCookie.Values(CookieItem) = ItemValue 
aCookie.Expires = DateTime.Now.AddDays(ExpiresDate) 
System.Web.HttpContext.Current.Response.Cookies.Add(aCookie) 
End Function 
'讀取單個Cookie 
Public Shared Function ReadCookie(ByVal CookieName As String) As String 
If Current.Request.Cookies(CookieName) Is Nothing Then 
Return Nothing 
Else 
Return Current.Request.Cookies(CookieName).Value 
End If 
End Function 
'讀取Cookie集合中的子項內容 
Public Shared Function ReadCookies(ByVal CookieName As String, ByVal CookieItem As String) As String 
If Current.Request.Cookies(CookieName) Is Nothing Then 
Return Nothing 
Else 
If Current.Request.Cookies(CookieName).Values(CookieItem) Is Nothing Then 
Return Nothing 
Else 
Return Current.Request.Cookies(CookieName).Values(CookieItem) 
End If 
End If 
End Function 
'刪除整個Cookie 
Public Shared Function DeleteCookie(ByVal CookieName As String) As Boolean 
Dim aCookie As New HttpCookie(CookieName) 
Dim i As Integer 
Dim limit As Integer = Current.Request.Cookies.Count - 1 
For i = 0 To limit 
aCookie = Current.Request.Cookies(i) 
aCookie.Expires = DateTime.Now.AddDays(-1) 
Current.Response.Cookies.Add(aCookie) 
Next 
End Function 
'刪除Cookie集合中的子項 
Public Shared Function DeleteCookies(ByVal CookieName As String, ByVal ItemName As String) As Boolean 
Dim aCookie As HttpCookie = Current.Request.Cookies(CookieName) 
aCookie.Values.Remove(ItemName) 
aCookie.Expires = DateTime.Now.AddDays(1) 
Current.Response.Cookies.Add(aCookie) 
End Function 
End Class 

 
 




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