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Question

我正在通過smo進行恢復過程。經過成功恢復，我啓用了我的數據庫 currentDb.SetOnline（）;

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

Application.Exit(); 

但是編寫上面的代碼並不存在我的應用程序，而是我得到了異常。詳情

enter code here System.NullReferenceException了未處理

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

這可能不是最好的解決方案，但如果你想退出你的應用程序和東西越來越紅，你可能想嘗試;

Environment.Exit(1);