vb.net画表针的简单介绍

用VB编一个钟表，表针运动程序怎么编？

这个比较麻烦，我曾经写过这么个程序片段，现在贴上来,代码比较复杂

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Shape1是时钟的一个框,是Shape控件,设置 Height 1455 Width 1575

LineHour,LineMinute,LineSecond分别为时,分,秒针,为Line控件

Label3,Label6,Label9,Label12为Label控件,分别为3.6.912点的显示数字

再画个Timer控件,Interval设置为1000

以上控件位置随便放,代码里调整

Form_Load事件里写

Shape1.Top = 100

Shape1.Left = Me.Width - 1800

LineHour.X1 = Shape1.Left + Shape1.Width / 2

LineHour.Y1 = Shape1.Top + Shape1.Height / 2

LineMinute.X1 = Shape1.Left + Shape1.Width / 2

LineMinute.Y1 = Shape1.Top + Shape1.Height / 2

LineSecond.X1 = Shape1.Left + Shape1.Width / 2

LineSecond.Y1 = Shape1.Top + Shape1.Height / 2

Label3.Left = Shape1.Left + Shape1.Width - Label3.Width - 200

Label3.Top = Shape1.Top + (Shape1.Height - Label3.Height) / 2

Label6.Left = Shape1.Left + (Shape1.Width - Label6.Width) / 2

Label6.Top = Shape1.Top + Shape1.Height - Label6.Height + 20

Label9.Left = Shape1.Left + 200

Label9.Top = Shape1.Top + (Shape1.Height - Label9.Height) / 2

Label12.Left = Shape1.Left + (Shape1.Width - Label12.Width) / 2

Label12.Top = Shape1.Top + 100

Timer事件里写

'利用Label显示数字

If Shape1.Visible True Then Shape1.Visible = True

If LineHour.Visible True Then LineHour.Visible = True

If LineMinute.Visible True Then LineMinute.Visible = True

If LineSecond.Visible True Then LineSecond.Visible = True

If Label3.Visible True Then Label3.Visible = True

If Label6.Visible True Then Label6.Visible = True

If Label9.Visible True Then Label9.Visible = True

If Label12.Visible True Then Label12.Visible = True

Dim cx As Single, cy As Single '圆心坐标

cx = Shape1.Left + Shape1.Width / 2

cy = Shape1.Top + Shape1.Height / 2

'利用Line控件绘制指针

LineSecond.X2 = LineSecond.X1 + Sin(CLng(Second(Now)) / 60 * 2 * pi) * 480

LineSecond.Y2 = LineSecond.Y1 - Cos(CLng(Second(Now)) / 60 * 2 * pi) * 480

LineMinute.X2 = LineMinute.X1 + Sin(CLng(Minute(Now)) / 60 * 2 * pi) * 360

LineMinute.Y2 = LineMinute.Y1 - Cos(CLng(Minute(Now)) / 60 * 2 * pi) * 360

LineHour.X2 = LineHour.X1 + Sin((CLng(Hour(Now)) + CLng(Minute(Now)) / 60) / 12 * 2 * pi) * 240

LineHour.Y2 = LineHour.Y1 - Cos((CLng(Hour(Now)) + CLng(Minute(Now)) / 60) / 12 * 2 * pi) * 240

'利用Line方法绘制刻度

Me.Line (cx + 250, cy - 433.012701892219)-(cx + 300, cy - 519.615242270663)

Me.Line (cx + 433.012701892219, cy - 250)-(cx + 519.615242270663, cy - 300)

Me.Line (cx + 433.012701892219, cy + 250)-(cx + 519.615242270663, cy + 300)

Me.Line (cx + 250, cy + 433.012701892219)-(cx + 300, cy + 519.615242270663)

Me.Line (cx - 250, cy + 433.012701892219)-(cx - 300, cy + 519.615242270663)

Me.Line (cx - 433.012701892219, cy + 250)-(cx - 519.615242270663, cy + 300)

Me.Line (cx - 433.012701892219, cy - 250)-(cx - 519.615242270663, cy - 300)

Me.Line (cx - 250, cy - 433.012701892219)-(cx - 300, cy - 519.615242270663)

VB.net中如何画图？

VB.net与VB不同。

VB.net已经有专门绘图的类。

可以定义笔刷然后用Drawing类中的方法绘制。

Private Sub DrawEllipse()

Dim myPen As New System.Drawing.Pen(System.Drawing.Color.Red)

Dim formGraphics as System.Drawing.Graphics

formGraphics = Me.CreateGraphics()

formGraphics.DrawEllipse(myPen, New Rectangle(0,0,200,300))

myPen.Dispose()

formGraphics.Dispose()

End Sub

Private Sub DrawRectangle()

Dim myPen As New System.Drawing.Pen(System.Drawing.Color.Red)

Dim formGraphics as System.Drawing.Graphics

formGraphics = Me.CreateGraphics()

formGraphics.DrawRectangle(myPen, New Rectangle(0,0,200,300))

myPen.Dispose()

formGraphics.Dispose()

End Sub

如何用VB.NET调用excel的画图命令，即用.NET得到一组点坐标后，调用excel根据点画出曲线图并显示在VB.NET里

你可以通过用VB.net控制excel，让excel生成曲线图，然后利用excelVBA将图输出，最后导入到VB.net就可以了。