vb.net实现实时数据采集曲线，有什么方法，或是书籍呢？

简单说下思路吧，具体的代码可以查资料

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首先要会画曲线图，有三种方法：

1、用mschar控件（vb6的）；2、用水晶报表；3、用word图表

x轴为时间，y轴为数据

要实现实时数据刷新，只要用 定时器 定时刷新曲线图的数据就可以了（x、y的数据重写）

vb.net连续绘制曲线图不消失

您好，您是想问vb.net连续绘制曲线图不消失怎么办？b.net连续绘制曲线图不消失的解决办法如下：

1、首先必须创建bitmap,关联到picturebox1.image上。

2、再在picturebox1.image上创建Graphics,再进行作图。即可显示线图。

VB.NET 实时曲线

拖一个PictureBox1控件 创建一个Paint事件。在事件中加入 Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint ' Create pens. Dim redPen As New Pen(Color.Red, 3) Dim greenPen As New Pen(Color.Green, 3) ' Create points that define curve. Dim point1 As New Point(50, 50) Dim point2 As New Point(100, 25) Dim point3 As New Point(200, 5) Dim point4 As New Point(250, 50) Dim point5 As New Point(300, 100) Dim point6 As New Point(350, 200) Dim point7 As New Point(250, 250) Dim curvePoints As Point() = {point1, point2, point3, point4, _ point5, point6, point7} ' Draw lines between original points to screen. e.Graphics.DrawLines(redPen, curvePoints) ' Draw curve to screen. e.Graphics.DrawCurve(greenPen, curvePoints) End Sub 得到数据后，改point的数据。然后PictureBox1.Refresh()就行了

VB.NET怎么应用GDI画串口通讯数据的实时曲线

拖一个PictureBox1控件

创建一个Paint事件。在事件中加入

Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint

' Create pens.

Dim redPen As New Pen(Color.Red, 3)

Dim greenPen As New Pen(Color.Green, 3)

' Create points that define curve.

Dim point1 As New Point(50, 50)

Dim point2 As New Point(100, 25)

Dim point3 As New Point(200, 5)

Dim point4 As New Point(250, 50)

Dim point5 As New Point(300, 100)

Dim point6 As New Point(350, 200)

Dim point7 As New Point(250, 250)

Dim curvePoints As Point() = {point1, point2, point3, point4, _

point5, point6, point7}

' Draw lines between original points to screen.

e.Graphics.DrawLines(redPen, curvePoints)

' Draw curve to screen.

e.Graphics.DrawCurve(greenPen, curvePoints)

End Sub

得到数据后，改point的数据。然后PictureBox1.Refresh()就行了

vb.net绘制曲线图

。net  其实还是很好绘制图形的

你可以看下 Graphics  类

Dim d As New Bitmap(Me.Width, Me.Height)  ‘一个图片吧

  Dim g As Graphics = Graphics.FromImage(d)’绘制  准备在这个图片是进行

然后  就是你绘制的东西了

线 就是   g.DrawLine()

圆 弧度  就用  g.DrawArc(Pens.Black, New Rectangle(0, 0, 400, 200), 0, 360)

复杂的就是      g.DrawBezier()

等  如果你用的是 VS的  编译  上面都有详细的参数说明

Dim d As New Bitmap(Me.Width, Me.Height)

Dim g As Graphics = Graphics.FromImage(d)

g.DrawArc(Pens.Black, New Rectangle(0, 0, 200, 200), 0, 360)

g.DrawLine(Pens.Red, New Point(0, 0), New Point(200, 200))

g.DrawLines(Pens.Green, New Point() {New Point(0, 0), New Point(50, 40), New Point(50, 80), New Point(90, 70), New Point(100, 400)})

g.DrawBezier(Pens.Yellow, New Point(0, 100), New Point(0, 0), New Point(200, 0）， New Point(200, 200))

g.Dispose()

Me.BackgroundImage = d

vb.net 绘制实时温度曲线

这个要用GDI+画。要看你.net版本。

以下是VS2005中的一段代码。

Me.PictureBox1.Height = 450

Me.PictureBox1.Width = 880

Dim gr As Graphics '定义画布

Dim bp As New Bitmap(880, 450) '定义位图,并进行赋值

Dim p As New Pen(Color.Black) '定义画笔

p.Width = 2 '宽度2

p.DashStyle = Drawing2D.DashStyle.Solid '样式直线

PictureBox1.Image = bp

gr = Graphics.FromImage(PictureBox1.Image)

gr.FillRectangle(Brushes.White, New Rectangle(0, 0, PictureBox1.Width, PictureBox1.Height))

gr.DrawLine(p, a, b, a, .Height - b) '绘制纵坐标

gr.DrawLine(p, a, .Height - b, .Width - a, .Height - b) '绘制横坐标

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