DatagridView：无法删除行

Question

我想清除数据网格视图而不删除列设置。一栏是DataGridViewComboBoxColumn。我使用以下代码：gridNomiColonne.Rows.Clear();gridNomiColonne.Columns.Clear();我收到以下错误："Cannot delete data" ( System.ArgumentExceptionHResult=0x80070057Messaggio=Impossibile cancellare questo elenco.Origine=System.DataAnalisi dello stack:in System.Data.DataView.System.Collections.IList.Clear()in System.Windows.Forms.BindingSource.Clear()in System.Windows.Forms.DataGridViewRowCollection.Clear()in ContabImporterf.MainForm.btnCarica_Click(Object sender, EventArgs e) inC:\Users\Utente\Documents\Visual Studio 2017\Projects\ContabImporterf\ContabImporterf\MainForm.cs: riga 200in System.Windows.Forms.Control.OnClick(EventArgs e)in System.Windows.Forms.Button.OnClick(EventArgs e)in System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)in System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)in System.Windows.Forms.Control.WndProc(Message& m)in System.Windows.Forms.ButtonBase.WndProc(Message& m)in System.Windows.Forms.Button.WndProc(Message& m)in System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)in System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32msg, IntPtr wparam, IntPtr lparam)in System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)in      Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNaiiveMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32reason, Int32 pvLoopData)in System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32reason, ApplicationContext context)in System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)in System.Windows.Forms.Application.Run(Form mainForm)in ContabImporterf.Program.Main() in C:\Users\Utente\Documents\Visual Studio2017\Projects\ContabImporterf\ContabImporterf\Program.cs: riga 19 )有任何想法吗？

Answer 1

您可以使用类似：

gridNomiColonne.DataSource = (gridNomiColonne.DataSource as DataTable).Clone();

这将删除网格中的所有行，但将保留表的结构。

如果您想清除所有数据，可以使用

gridNomiColonne.DataSource= null;