如何从formload中绘制listview列和行？ [英] How do I draw in listview columns and rows from formload?

问题描述

截至目前，我可以通过单独的活动进行此操作，



这里是我正在使用的代码：

<登记/>

as of now I am able to do this from a separate event,

here is the code I am using:

Private Sub ListView1_DrawSubItem(sender As Object, e As System.Windows.Forms.DrawListViewSubItemEventArgs) Handles ListView1.DrawSubItem
       With e.Graphics
           .DrawLines(New Pen(SystemColors.ButtonShadow), New Point() {New Point(e.Bounds.Left, e.Bounds.Top - 1), New Point(e.Bounds.Left + e.Bounds.Width, e.Bounds.Top - 1), New Point(e.Bounds.Left + e.Bounds.Width, e.Bounds.Top + e.Bounds.Height), New Point(e.Bounds.Left, e.Bounds.Top + e.Bounds.Height)})

       End With

       e.DrawText()

   End Sub

我试图将其转移到form_load事件的原因是，每当我调用listview1.click事件时，listview会一直闪烁。但是，我相信这可能会停止，如果这是永久性地在listview上绘制而不是每次都被绘制它自己的事件。



我尝试过：



我尝试使用creategraphics



这里是我试过的代码：

The reason I am trying to get this over to the form_load event is that every time I call forth my listview1.click event the listview keeps flashing. However, I believe this may stop if this was drawn on listview permanently instead of being its own event being drawn every time.

What I have tried:

I tried using a creategraphics

here is the code I tried:

With CreateGraphics()
          .DrawLines(New Pen(SystemColors.ButtonShadow), New Point() {New Point(ListView1.Bounds.Left, ListView1.Bounds.Top - 1), New Point(ListView1.Bounds.Left + ListView1.Bounds.Width, ListView1.Bounds.Top - 1), New Point(ListView1.Bounds.Left + ListView1.Bounds.Width, ListView1.Bounds.Top + ListView1.Bounds.Height), New Point(ListView1.Bounds.Left, ListView1.Bounds.Top + ListView1.Bounds.Height)})
      End With

但它不起作用

but it didn't work

推荐答案

经过几天的搜索和尝试不同的事情，我找到了我正在寻找的解决方案。但是，我并不完全理解它是如何工作的，但它确实可以阻止闪烁。

After a couple days of searching and trying different things, I found the solution I was looking for. However, I do not completely understand how it works, but it does stop the flickering.

Protected Overloads Overrides ReadOnly Property CreateParams() As CreateParams 'stop flicker code part 1 of 2
      Get
          Dim cp As CreateParams = MyBase.CreateParams
          cp.ExStyle = cp.ExStyle Or 33554432
          Return cp
      End Get
  End Property
  Private Sub PreVentFlicker() 'stop flicker code part 2 of 2
      With Me
          .SetStyle(ControlStyles.OptimizedDoubleBuffer, True)
          .SetStyle(ControlStyles.UserPaint, True)
          .SetStyle(ControlStyles.AllPaintingInWmPaint, True)
          .UpdateStyles()
      End With
  End Sub

< br $> b $ b

http://www.dreamincode.net/forums/topic/294248-flicker-problem-on-form-loading/

http://www.dreamincode.net/forums/topic/294248-flicker-problem-on-form-loading/

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