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Question

我正在通過smo進行恢復過程。 在成功恢復后，我啟用了我的數據庫currentDb.SetOnline（）;

問題是數據庫實例在此之后無法工作。 實例無法連接。 所以我想我不會關閉我的應用程序。

    Application.Exit();

但編寫上面的代碼不存在我的應用程序，而不是我得到了例外。 細節是

enter code here System.NullReferenceException未處理

Message="Object reference not set to an instance of an object."
  Source="VitoProject"
  StackTrace:
       at VitoProject.backAndRestore.restoreDatabase_Click(Object sender, EventArgs e) in C:\WorkSpace\VitoProject\VitoProject\backAndRestore.cs:line 176
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ButtonBase.WndProc(Message& m)
       at System.Windows.Forms.Button.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at VitoProject.Program.Main() in C:\WorkSpace\VitoProject\VitoProject\Program.cs:line 18
       at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()

Answer 1

它可能不是最好的解決方案，但是如果你試圖退出你的應用程序並且有些東西被掛起，你可能想嘗試一下;

Environment.Exit(1);