訪問會話變量爲用戶控件

Question

我在我的aspx.cs會話[「名稱」]文件 如何從用戶控件代碼隱藏訪問同一頁面上

感謝，

Answer 1

嘗試像這樣的：

string name= HttpContext.Current.Session["Name"].ToString(); 

或

string name=Session["Name"].ToString(); 

Answer 2

試試這個還有：

HttpContext.Current.Session["Name"] 

Answer 3

您需要從該控件創建一個對象。

Answer 4

沒有看到一點點的代碼，這將是很難說。

• 也許會話超時
• 是否有錯誤happing導致會話狀態是明確的，或註銷
• 修改web.config文件或多個文件可能會導致應用程序重新啓動。

最後，我必須問： - 會話是否以某種方式被禁用？它在其他頁面之間工作嗎？也許它被禁用了Ajax請求？ - 可能是一個魔術字符串錯誤。

個人，以避免魔術字符串錯誤，我使用會話包裝：

/// <summary> 
///  The session manager 
/// </summary> 

public sealed class SessionManager 
{ 
    #region ISessionManager Members 

    /// <summary> 
    ///  Clears the session. 
    /// </summary> 
    public void ClearSession() 
    { 
     HttpContext.Current.Session.Clear(); 
     HttpContext.Current.Session.Abandon(); //Abandon ends the entire session (the user gets a new SessionId) 
    } 

    /// <summary> 
    ///  Gets or sets the current employe. 
    /// </summary> 
    /// <value>The current employe.</value> 
    public EmployeDto CurrentEmploye 
    { 
     get { return Get<EmployeDto>(); } 
     set { Add(value); } 
    } 

    /// <summary> 
    ///  Gets or sets the parameters. 
    /// </summary> 
    /// <value>The parameters.</value> 
    public IList<ParameterDto> Parameters 
    { 
     get { return Get<List<ParameterDto>>() ?? new List<ParameterDto>(); } 
     set { Add(value); } 
    } 

    #endregion 

    #region Methods 

    /// <summary> 
    ///  Adds the specified key. 
    /// </summary> 
    /// <typeparam name="T"></typeparam> 
    /// <param name="value">The value.</param> 
    /// <param name="key">The key.</param> 
    /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns> 
    /// <exception cref="System.ArgumentNullException">key</exception> 
    /// <exception cref="System.Exception">Session elements cannot be added when session is disabled.</exception> 
    public static bool Add<T>(T value, [CallerMemberName] string key = null) 
    { 
     if (key == null) throw new ArgumentNullException("key"); 
     HttpContext current = HttpContext.Current; 

     if (current == null) 
     { 
      return false; 
     } 

     if (current.Session.Mode == SessionStateMode.Off) 
     { 
      throw new Exception("Session elements cannot be added when session is disabled."); 
     } 

     current.Session.Add(key, value); 

     return true; 
    } 

    /// <summary> 
    ///  Gets the specified key. 
    /// </summary> 
    /// <typeparam name="T"></typeparam> 
    /// <param name="key">The key.</param> 
    /// <returns>``0.</returns> 
    /// <exception cref="System.ArgumentNullException">key</exception> 
    /// <exception cref="System.Exception">Session elements cannot be added when session is disabled.</exception> 
    public static T Get<T>([CallerMemberName] string key = null) where T : class 
    { 
     if (key == null) throw new ArgumentNullException("key"); 
     HttpContext current = HttpContext.Current; 

     if (current.Session.Mode == SessionStateMode.Off) 
     { 
      throw new Exception("Session elements cannot be added when session is disabled."); 
     } 

     return current.Session[key] as T; 
    } 

    /// <summary> 
    ///  Gets the specified key. 
    /// </summary> 
    /// <param name="key">The key.</param> 
    /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns> 
    /// <exception cref="System.ArgumentNullException">key</exception> 
    /// <exception cref="System.Exception">Session elements cannot be added when session is disabled.</exception> 
    public static bool Get([CallerMemberName] string key = null) 
    { 
     if (key == null) throw new ArgumentNullException("key"); 
     HttpContext current = HttpContext.Current; 

     if (current.Session.Mode == SessionStateMode.Off) 
     { 
      throw new Exception("Session elements cannot be added when session is disabled."); 
     } 
     bool result = false; 
     bool.TryParse(current.Session[key].ToString(), out result); 
     return result; 
    } 

    /// <summary> 
    ///  Removes the specified key. 
    /// </summary> 
    /// <param name="key">The key.</param> 
    /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns> 
    /// <exception cref="System.ArgumentNullException">key</exception> 
    /// <exception cref="System.Exception">Session elements cannot be added when session is disabled.</exception> 
    public static bool Remove(string key) 
    { 
     if (key == null) throw new ArgumentNullException("key"); 
     HttpContext current = HttpContext.Current; 

     if (current == null) 
     { 
      return false; 
     } 

     if (current.Session.Mode == SessionStateMode.Off) 
     { 
      throw new Exception("Session elements cannot be added when session is disabled."); 
     } 

     current.Session.Remove(key); 

     return true; 
    } 

    #endregion 
} 

我的示例使用反射來定義鍵名稱相同的屬性名，但你可以使用常數來代替。它還檢查會話是否被禁用，這可能有助於調試您的案例。