淺析VB.NET繪制GDI圖形的方法
在向大家詳細介紹用VB.NET繪制GDI圖形之前,首先讓大家了解下VB.NET是什么,然后全面介紹VB.NET繪制GDI圖形。
Visual Basic.NET是基于微軟.NET Framework之上的面向對象的中間解釋性語言,可以看作是Visual Basic在.Net Framework平臺上的升級版本,增強了對面向對象的支持。但由于改動太大,導致VB.net對VB的向后兼容性不好,在業界引起不小的爭議。
大多的VB.Net程序員使用Visual Studio .Net作為IDE(integrated development environment). SharpDevelop是另一種可用的開源的IDE。VB.Net需要在.Net Framework平臺上才能執行。 VB.NET的主頁http://msdn.microsoft.com/vbasic
用VB.NET繪制GDI圖形
- Protected Overrides Sub onpaint(ByVal e As System.Windows.Forms.PaintEventArgs)
- '繪制任意直線
- Dim g As Graphics = e.Graphics
- Dim mypen As Pen = New Pen(Color.Red, 2)
- g.DrawLine(mypen, 100, 100, 10, 10)
- '繪制矩形(任意直線構成的封閉圖形)
- Dim point1 As PointF = New PointF(100F, 100F)
- Dim point2 As PointF = New PointF(200F, 100F)
- Dim point3 As PointF = New PointF(200F, 200F)
- Dim point4 As PointF = New PointF(100F, 200F)
- Dim curvepoints As PointF() = {point1, point2, point3, point4}
- g.DrawPolygon(New Pen(Color.Blue, 2), curvepoints)
- '文本表示
- Dim FFamily As FontFamily = New FontFamily("Arial")
- Dim font As Font = New Font(FFamily, "20", FontStyle.Bold, FontStyle.Italic,
- GraphicsUnit.Pixel)
- Dim text As String = "I love you!"
- Dim solidbrush As SolidBrush = New SolidBrush(Color.Red)
- Dim pr As PointF = New PointF(100, 10)
- e.Graphics.DrawString(text, font, solidbrush, pr)
- '平面繪制
- Dim rec As RectangleF = New RectangleF(10, 10, 200, 100)
- g.DrawPie(mypen, rec, 150, 150)
- '封閉圖形,0.7應該是個圓
- g.DrawClosedCurve(mypen, curvepoints, 0.7,
- Drawing.Drawing2D.FillMode.Alternate)
- '大家自己試試看吧
- g.DrawArc(mypen, 300, 300, 200, 200, 100, 100)
- g.DrawCurve(mypen, curvepoints)
- g.DrawBezier(mypen, 50, 50, 100, 50, 100, 100, 50, 100)
- g.DrawBeziers(mypen, curvepoints)
- '這可是一個圓
- Dim rec1 As RectangleF = New RectangleF(10, 10, 100, 100)
- g.DrawEllipse(mypen, rec1)
- '這是一個橢圓
- Dim rec2 As RectangleF = New RectangleF(10, 10, 200, 100)
- g.DrawEllipse(mypen, rec2)
- End Sub
以上介紹VB.NET繪制GDI圖形,這些是我自己試驗出來的,當然了,還有好多,我只是開了一個頭,大家要是發現什么好東東,別忘了通知一下。
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