How to clear line made by Editor.DrawVector()

[gangzaishao]

to clear lines made by Editor.DrawVector()
I 'v tried to Use Editor.UpdateScreen() but is no effective!!
Can anyone tell me? thanks

[gangzaishao]

{code}
#define ACADR17
using System;
using System.Collections.Generic;
using System.Text;
//
using System.Runtime.InteropServices;
//
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using AcadException = Autodesk.AutoCAD.Runtime.Exception;
using AcadApp = Autodesk.AutoCAD.ApplicationServices.Application;
//
namespace StrassenCAD
{
public static class GZSTool
{
//
[System.Security.SuppressUnmanagedCodeSecurity]
[DllImport("acad.exe", CallingConvention = CallingConvention.Cdecl)]
private static extern Int32 acedRedraw(long [] name, Int32 mode);
#if ACADR16
[DllImport("acdb16.dll", CallingConvention=CallingConvention.Cdecl, EntryPoint="?acdbGetAdsName@@YA?AW4ErrorStatus@Acad@@AAY01JVAcDbObjectId@@@Z")]
#elif ACADR17
[DllImport("acdb17.dll", CallingConvention=CallingConvention.Cdecl, EntryPoint="?acdbGetAdsName@@YA?AW4ErrorStatus@Acad@@AAY01JVAcDbObjectId@@@Z")]
#endif
private static extern int acdbGetAdsName(long[] name, ObjectId objId);
//
public static void ReDraw()
{
acedRedraw(null,1);
}
}
}
{code}

[ButterFlyShame]

Use regen

[StormyC]

I think you need to use this to get the document to redraw - regen takes a long time on large drawings so I use this method in one of my routines.

Using lock As DocumentLock = acDoc.LockDocument 
  acDoc.TransactionManager.EnableGraphicsFlush(True) 
  Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction() 
    '***Do stuff 
    acDoc.TransactionManager.QueueForGraphicsFlush() 
    acDoc.TransactionManager.FlushGraphics() 
    acDoc.Editor.UpdateScreen() 
    acTrans.Commit() 
  End Using 
End Using

 Sorry I forget where i found it so cant give proper credit.