TableNotEnabledForNotificationException クラス
アセンブリ: System.Web (system.web.dll 内)

<SerializableAttribute> _ Public NotInheritable Class TableNotEnabledForNotificationException Inherits SystemException
[SerializableAttribute] public sealed class TableNotEnabledForNotificationException : SystemException
[SerializableAttribute] public ref class TableNotEnabledForNotificationException sealed : public SystemException

SqlCacheDependency オブジェクトを作成し、SqlCacheDependency オブジェクトに依存する Cache に項目を追加するコード例を次に示します。SQL Server データベース テーブルで依存関係通知が有効になっていない場合は、TableNotEnabledForNotificationException がスローされ、SqlCacheDependencyAdmin.EnableTableForNotifications メソッドを呼び出して処理されます。
Sub Page_Load(Src As Object, E As EventArgs) ' Declare the SqlCacheDependency instance, SqlDep. Dim SqlDep As SqlCacheDependency ' Check the Cache for the SqlSource key. ' If it isn't there, create it with a dependency ' on a SQL Server table using the SqlCacheDependency class. If Cache("SqlSource") Is Nothing ' Because of possible exceptions thrown when this ' code runs, use Try...Catch...Finally syntax. Try ' Instantiate SqlDep using the SqlCacheDependency constructor. SqlDep = New SqlCacheDependency("Northwind", "Categories") ' Handle the DatabaseNotEnabledForNotificationException with ' a call to the SqlCacheDependencyAdmin.EnableNotifications method. Catch exDBDis As DatabaseNotEnabledForNotificationException Try SqlCacheDependencyAdmin.EnableNotifications("Northwind") ' If the database does not have permissions set for creating tables, ' the UnauthorizedAccessException is thrown. Handle it by redirecting ' to an error page. Catch exPerm As UnauthorizedAccessException Response.Redirect(".\ErrorPage.htm") End Try ' Handle the TableNotEnabledForNotificationException with ' a call to the SqlCacheDependencyAdmin.EnableTableForNotifications method. Catch exTabDis As TableNotEnabledForNotificationException Try SqlCacheDependencyAdmin.EnableTableForNotifications( _ "Northwind", "Categories") ' If a SqlException is thrown, redirect to an error page. Catch exc As SqlException Response.Redirect(".\ErrorPage.htm") End Try ' If all the other code is successful, add MySource to the Cache ' with a dependency on SqlDep. If the Categories table changes , ' MySource will be removed from the Cache. Then generate a message ' that the data is newly created and added to the cache. Finally Cache.Insert("SqlSource", Source1, SqlDep) CacheMsg.Text = "The data object was created explicitly." End Try Else CacheMsg.Text = "The data was retrieved from the Cache." End If End Sub

System.Exception
System.SystemException
System.Web.Caching.TableNotEnabledForNotificationException


Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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