主题：求，为什么有时候正常，有时候按就执行过程会有明显的闪

减去按钮    执行过程会有明显的闪烁

SystemReady = False
For Each dr As DataRow In CurrentTable.DataTable.DataRows
    dr("产品")=dr("产品")
    dr("数量")=-dr("数量")
Next
SystemReady = True
SystemReady = False
For Each dr2 As DataRow In CurrentTable.DataTable.DataRows
    Dim dr1 As DataRow = DataTables("订单").AddNew
    dr1("产品")=dr2("产品")
    dr1("数量")=dr2("数量")
    dr1("用户")=_UserName
    dr1("时间")=Date.Now()
Next
DataTables("订单").Save
SystemReady = True
Dim cm As WinForm.TextBox = e.Form.Controls("zdcm")
cm.Value = 0
Dim g As New GroupTableBuilder("统计表1", DataTables("订单"))
g.Groups.AddDef("产品")
g.Totals.AddDef("数量")
g.FromServer = True
Tables("Main_Table2").DataSource = g.BuildDataSource()
For Each dr As Row In Tables("Main_Table2").Rows
    Dim i As Integer
    Dim tb As WinForm.Label = e.Form.Controls("Label3")
    i= Tables("Main_Table2").Compute("sum(数量)")
    tb.Text=i
Next
Tables("Main_Table2").Sort = "数量 DESC"
DataTables("Main_Table2").RemoveFor("产品 is null")
DataTables("Main_Table2").RemoveFor("数量 = 0")

谢谢