vb点虐画图保存 vbs 画图

vb点虐用timer触发画图时如何让上一次绘制的图形保留下来

没试过。也许这样能行：画新图时强制使前一秒的屏幕不刷新重画。具体怎么实现继续探索。

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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click '好处：画的图刷新不会消失

PictureBox1.Image = Nothing

Dim wid As Integer = PictureBox1.ClientSize.Width

Dim hgt As Integer = PictureBox1.ClientSize.Height

Dim bm As New Bitmap(wid, hgt)

Dim g As Graphics = Graphics.FromImage(bm)

'画图代码，比如下面的直线

g.DrawLine(Pens.Red, 10, 10, 500, 10)

'画图代码

PictureBox1.Image = bm

PictureBox1.Refresh()

g.Dispose()

PictureBox1.Image.Save("C:\1.jpg")

End Sub

不用PictureBoxTest.Image属性，直接把图形绘制到PictureBoxTest上面就可以了。

Dim button As Integer = 0

Private Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) _

Handles Button1.Click

Using g As Graphics = Graphics.FromHwnd(PictureBoxTest.Handle)

Dim penRed As Pen = New Pen(Color.Red, 1) '定义红色画笔

Dim penblue As Pen = New Pen(Color.Blue, 1) '定义蓝色画笔

If button = 0 Then

g.DrawLine(penRed, 0, 0, 100, 100)

button = 1

ElseIf button = 1 Then

g.DrawLine(penblue, 100, 100, 200, 200)

button = 0

End If

End Using

End Sub

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