FormsAuthenticationEventArgs.User 屬性

定義

命名空間:

System.Web.Security

組件:

System.Web.dll

取得或設定 IPrincipal 物件與目前請求相關聯。

public:
 property System::Security::Principal::IPrincipal ^ User { System::Security::Principal::IPrincipal ^ get(); void set(System::Security::Principal::IPrincipal ^ value); };

public System.Security.Principal.IPrincipal User { get; set; }

member this.User : System.Security.Principal.IPrincipal with get, set

Public Property User As IPrincipal

屬性值

IPrincipal

要與當前請求相關聯的 IPrincipal 物件。

範例

以下範例利用 FormsAuthentication_OnAuthenticate 事件將 current HttpContext 的屬性設定User為GenericPrincipal具有自訂 Identity的物件。

public void FormsAuthentication_OnAuthenticate(object sender, FormsAuthenticationEventArgs args)
{
  if (FormsAuthentication.CookiesSupported)
  {
    if (Request.Cookies[FormsAuthentication.FormsCookieName] != null)
    {
      try
      {
        FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(
          Request.Cookies[FormsAuthentication.FormsCookieName].Value);
        
        args.User = new System.Security.Principal.GenericPrincipal(
          new Samples.AspNet.Security.MyFormsIdentity(ticket),
          new string[0]);
      }
      catch (Exception e)
      {
        // Decrypt method failed.
      }
    }
  }
  else
  {
    throw new HttpException("Cookieless Forms Authentication is not " +
                            "supported for this application.");
  }
}

Public Sub FormsAuthentication_OnAuthenticate(sender As Object, _
                                              args As FormsAuthenticationEventArgs)
  If FormsAuthentication.CookiesSupported Then
    If Not Request.Cookies(FormsAuthentication.FormsCookieName) Is Nothing Then
      Try
        Dim ticket As FormsAuthenticationTicket = FormsAuthentication.Decrypt( _
          Request.Cookies(FormsAuthentication.FormsCookieName).Value)
        
        args.User = New System.Security.Principal.GenericPrincipal( _
          New Samples.AspNet.Security.MyFormsIdentity(ticket), _
          New String(0) {})
      Catch e As HttpException
        ' Decrypt method failed.
      End Try
    End If
  Else
      Throw New Exception("Cookieless Forms Authentication is not " & _
                            "supported for this application.")
  End If
End Sub

備註

你可以用這個User屬性把 current HttpContext 的屬性設定User成自訂IPrincipal物件。

若您在FormsAuthentication_OnAuthenticate事件中未指定屬性值User，則會使用表單認證單中 cookie 或 URL 所提供的身份。

另請參閱

• 表單認證提供者