方法一：Excel中就可以实现；
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方法二：通过VB.net将数据写入到Excel中生成趋势图；
方法三:直接通过VB.net写出这种趋势图。
具体方法可以参考VB.net操作Excel方法:
可用代码：
For i = 0 To iRow - 1
pointXY(i) = "'这里你可以直接放上你的数据点值在X线上
"
pointYY(i) = "'这里你可以直接放上你的数据点值在Y线上
Next
Private Sub DrawRectangle()
Try
Dim oV2Bar As New Graphing.V3.Bar.BarChart()
Dim renderer As New Graphing.V3.Render
PictureBox1.Image = renderer.DrawChart(oV2Bar, Xline,Yline iRow, pointXY, pointYY)
End If
Catch ex As Exception
MsgBox(ex.Message)
Public Class BarChart : Inherits Base.BaseGraph
'This will hold the Bar pieces.
Public BarSliceCollection As New Bar.BarPieceCollection()
Private _Alignment As Base.b_BarTypes = Base.b_BarTypes.HorizontalLeft
Public Property Alignment() As Base.b_BarTypes
Get
Return _Alignment
End Get
Set(ByVal Value As Base.b_BarTypes)
_Alignment = Value
End Set
End Property
'Private _ChartType As Base.b_ChartType = Base.b_ChartType.Bar
Public Shadows ReadOnly Property ChartType() As Base.b_ChartType
Get
Return MyBase.ChartType
End Get
End Property
Sub New()
MyBase.new()
MyBase.ChartType = Base.b_ChartType.Bar
End Sub
Sub New(ByVal BarPieceCollection As BarPieceCollection)
MyBase.new()
MyBase.ChartType = Base.b_ChartType.Bar
BarSliceCollection = BarPieceCollection
End Sub
End Class
End Try
End Sub
。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
Beginning VB 2008 从入门到精通 ;ID=181830 Pro VB 2008 and the .NET 3.5 Platform ;ID=184746 Visual Basic 2008 Programmerss Reference ;ID=181605 Apress Accelerated VB 2008 ;ID=181504 Visual Basic 2008 Step by Step Wrox Professional VB 2005 with .NET 3.0 ;ID=158893 Build A Program Now Visual Basic 2005 ;ID=146029 .NET游戏编程入门经典—VB.NET篇 ;ID=158821 O'Reilly Visual Basic 2005 Cookbook ;ID=160654 .NET Insight for Classic VB Developers ;ID=162041 Fast Track Visual Basic.NET ;ID=161990 Security for Microsoft Visual Basic.NET ;ID=175012 Visual Basic.NET How to Program 第二版 ;ID=173182 Visual Basic 2005 简明教程 ;ID=173180 Visual Basic 2005傻瓜书 ;ID=173178 Programming Visual Basic.NET ;ID=173164 Visual Basic .NET Tips and Techniques ;ID=176561 VB开发人员SQL Sever指南 ;ID=173176 How to Code .NET ;ID=145559 Essential .NET, Volume I ;ID=176152 ADO.NET全攻略 . 查看原帖
vb.net:先计算好坐标，再用GDI+里封装的drawline方法画出短线（模拟数据点），传来一个数据就画一条短线，最后看起来就像曲线了。
vb6:用pset()函数
