求助 新手 在DataGridView中 插入一个表 修改Da

在DataGridView中 插入一个表DataGridView1.Columns("Price").DefaultCellStyle.Format = "N2" 未处理 System.NullReferenceException
HResult=-2147467261
Message=未将对象引用设置到对象的实例。
Source=mySqlCommandBuilder
StackTrace:
在 mySqlCommandBuilder.图书管理.DataGridView1_CellEndEdit(Object sender, DataGridViewCellEventArgs e) 位置 H:\新建文件夹\mySqlCommandBuilder\mySqlCommandBuilder\图书管理.vb:行号 46
在 System.Windows.Forms.DataGridView.OnCellEndEdit(DataGridViewCellEventArgs e)
在 System.Windows.Forms.DataGridView.EndEdit(DataGridViewDataErrorContexts context, DataGridViewValidateCellInternal validateCell, Boolean fireCellLeave, Boolean fireCellEnter, Boolean fireRowLeave, Boolean fireRowEnter, Boolean fireLeave, Boolean keepFocus, Boolean resetCurrentCell, Boolean resetAnchorCell)
在 System.Windows.Forms.DataGridView.CommitEditForOperation(Int32 columnIndex, Int32 rowIndex, Boolean forCurrentCellChange)
在 System.Windows.Forms.DataGridView.ScrollIntoView(Int32 columnIndex, Int32 rowIndex, Boolean forCurrentCellChange)
在 System.Windows.Forms.DataGridView.ProcessDownKeyInternal(Keys keyData, Boolean& moved)
在 System.Windows.Forms.DataGridView.ProcessEnterKey(Keys keyData)
在 System.Windows.Forms.DataGridView.ProcessDialogKey(Keys keyData)
在 System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
在 System.Windows.Forms.TextBoxBase.ProcessDialogKey(Keys keyData)
在 System.Windows.Forms.Control.PreProcessMessage(Message& msg)
在 System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
在 System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
在 System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FPreTranslateMessage(MSG& msg)
在 System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
在 System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
在 System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
在 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
在 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
在 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
在 mySqlCommandBuilder.My.MyApplication.Main(String[] Args) 位置 17d14f5c-a337-4978-8281-53493378c1071.vb:行号 81
在 System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
在 System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
在 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
在 System.Threading.ThreadHelper.ThreadStart_Context(Object state)
在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
在 System.Threading.ThreadHelper.ThreadStart()
InnerException: