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.ArgumentException

HResult=0x80070057

Messaggio=Impossibile cancellare questo elenco.

Origine=System.Data

Analisi 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) in

C:\Users\Utente\Documents\Visual Studio 2017\Projects\ContabImporterf

\ContabImporterf\MainForm.cs: riga 200

in 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, Int32

msg, IntPtr wparam, IntPtr lparam)

in System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)

in      

Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNai

iveMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32

reason, Int32 pvLoopData)

in System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32

reason, 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 Studio

2017\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;