vb.net 控制excel画饼状图
我自己写的控件,里面有示例程序,很简单的。不过饼图只设置了12种颜色。。。只能显示12项
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用vb.net可以做出饼图吗
Dim MyGraphics As Graphics = Me.PictureBox1.CreateGraphics
Dim MyBrush As New SolidBrush(Color.Red)
Dim MyProportion As Single
Dim MyRect As New Rectangle
Dim MyPoint As New PointF
Dim R As Single
Const PI = 3.1415926
MyGraphics.Clear(Color.White)
Dim MyStartAngel As Double
Dim MySweepAngel As Double
R = Math.Min(Me.PictureBox1.Width, Me.PictureBox1.Height) / 2 - 15
MyPoint.X = Me.PictureBox1.Width / 2
MyPoint.Y = Me.PictureBox1.Height / 2
MyRect.X = MyPoint.X - R
MyRect.Y = MyPoint.Y - R
MyRect.Width = R * 2
MyRect.Height = R * 2
MyStartAngel = 0
MyProportion = Val(TextBox7.Text)
MySweepAngel = MyProportion * 360 / PI
MyBrush.Color = Color.Red
MyGraphics.FillPie(MyBrush, MyRect, MyStartAngel, MySweepAngel)
' MyStartAngel = MyStartAngel + MySweepAngel
MyProportion = 0.75
MySweepAngel = 360 * MyProportion
MyBrush.Color = Color.Blue
MyGraphics.FillPie(MyBrush, MyRect, MyStartAngel, MySweepAngel)
vb.net中怎样曲线图,棒图,和饼图
vb2010以后的版本就自带Chart控件了,比如
Chart1.Series(0).ChartType = DataVisualization.Charting.SeriesChartType.Pie '饼图
我想问下,讲数据保存到excel中后,如何在VB.net中继续写代码,使得能够将这些数据生成一个饼图?并保存。
用宏功能啊,然后把宏代码(vb6.0)转化为Vb.net代码,有一个关键问题,就是VBA中的枚举类型在Vb.net中不适用,比如.End(xlUp)更改为.End(3)就能运行,另外vb.net中运行Excel对象不一定在点后会出现智能提示(即使你引用后也一样)你只要确定有该方法或者属性,直接写就是了,生成或者调试都是可以通过的
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