c# – 关闭主线程

我正在通过smo进行恢复过程.成功恢复后,我启用了我的数据库
        currentDb.Setonline();

问题是数据库实例在此之后无法工作.实例无法连接.所以我想我不会关闭我的应用程序.

Application.Exit();

但编写上面的代码不存在我的应用程序,而不是我得到了例外.细节是

输入代码hereSystem.NullReferenceException未处理

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()

解决方法

它可能不是最好的解决方案,但是如果你试图退出你的应用程序并且有些东西被挂起,你可能想尝试一下;

Environment.Exit(1);