vb.net 画直线问题
PublicClassForm1DimgraphAsGraphics=Me.CreateGraphicsPrivateSubButton1_Click(ByValsend...
Public Class Form1
Dim graph As Graphics = Me.CreateGraphics
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim pen2 As Pen = New Pen(Color.Green, 3)
graph.DrawLine(pen2, 400, 400, 500, 200)
End Sub
End Class
这个程序 怎么画不出来直线啊 只要起点大于300,300 就划不出来 窗体是 Maximized 展开
Dim graph As Graphics = Me.CreateGraphics
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim pen2 As Pen = New Pen(Color.Green, 3)
graph.DrawLine(pen2, 400, 400, 500, 200)
End Sub
End Class
这个程序 怎么画不出来直线啊 只要起点大于300,300 就划不出来 窗体是 Maximized 展开
1个回答
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'把“Dim graph As Graphics = Me.CreateGraphics”挪到“Button1_Click”事件内，调试过成功！
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim graph As Graphics = Me.CreateGraphics
Dim pen2 As Pen = New Pen(Color.Green, 3)
graph.DrawLine(pen2, 400, 400, 500, 200)
End Sub
End Class
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim graph As Graphics = Me.CreateGraphics
Dim pen2 As Pen = New Pen(Color.Green, 3)
graph.DrawLine(pen2, 400, 400, 500, 200)
End Sub
End Class
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