簡單說下思路吧,具體的代碼可以查資料
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首先要會畫曲線圖,有三種方法:
1、用mschar控件(vb6的);2、用水晶報表;3、用word圖表
x軸為時間,y軸為數(shù)據(jù)
要實現(xiàn)實時數(shù)據(jù)刷新,只要用 定時器 定時刷新曲線圖的數(shù)據(jù)就可以了(x、y的數(shù)據(jù)重寫)
您好,您是想問vb.net連續(xù)繪制曲線圖不消失怎么辦?b.net連續(xù)繪制曲線圖不消失的解決辦法如下:
1、首先必須創(chuàng)建bitmap,關聯(lián)到picturebox1.image上。
2、再在picturebox1.image上創(chuàng)建Graphics,再進行作圖。即可顯示線圖。
拖一個PictureBox1控件 創(chuàng)建一個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 得到數(shù)據(jù)后,改point的數(shù)據(jù)。然后PictureBox1.Refresh()就行了
拖一個PictureBox1控件
創(chuàng)建一個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
得到數(shù)據(jù)后,改point的數(shù)據(jù)。然后PictureBox1.Refresh()就行了
。net ?其實還是很好繪制圖形的
你可以看下?Graphics ?類
Dim d As New Bitmap(Me.Width, Me.Height) ?‘一個圖片吧
? Dim g As Graphics = Graphics.FromImage(d)’繪制 ?準備在這個圖片是進行
然后 ?就是你繪制的東西了
線 就是 ??g.DrawLine()
圓 弧度 ?就用 ?g.DrawArc(Pens.Black, New Rectangle(0, 0, 400, 200), 0, 360)
復雜的就是 ? ? ?g.DrawBezier()
等 ?如果你用的是 VS的 ?編譯 ?上面都有詳細的參數(shù)說明
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
這個要用GDI+畫。要看你.net版本。
以下是VS2005中的一段代碼。
Me.PictureBox1.Height = 450
Me.PictureBox1.Width = 880
Dim gr As Graphics '定義畫布
Dim bp As New Bitmap(880, 450) '定義位圖,并進行賦值
Dim p As New Pen(Color.Black) '定義畫筆
p.Width = 2 '寬度2
p.DashStyle = Drawing2D.DashStyle.Solid '樣式直線
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) '繪制縱坐標
gr.DrawLine(p, a, .Height - b, .Width - a, .Height - b) '繪制橫坐標
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