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。

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vb.net作业，画坐标轴及标尺，画y=sin（x）曲线

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

Dim pt(200) As PointF

Dim a As Integer

For a = 0 To 200

pt(a).X = 50 * a

pt(a).Y = 200 - 50 * Math.Sin(a - 1)

Next

Me.CreateGraphics.DrawLine(Pens.Blue, 0, 200, 800, 200)

Me.CreateGraphics.DrawLine(Pens.Blue, 50, 0, 50, 600)

Me.CreateGraphics.DrawCurve(Pens.Blue, pt)

End Sub

vb.net 制作行标尺

左边放一个专门放行数的listbox，根据右边的行数自动生成行号

Private Sub RichTextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox1.TextChanged

Dim arr() = RichTextBox1.Text.Split(vbLf)

Dim str As String

str = ""

For i = 1 To arr.Length

str = str i vbCrLf

Next

RichTextBox2.Text = str

End Sub

接下来是两个listbox的同步滚动，可以参考这篇文章：

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

怎样在vb.net的picturebox里画出坐标啊？

自己用GDI+画的 无论什么什么尺寸的picturebox都行

不过别太小了o(∩_∩)o

代码放在哪里自己决定啊

最好是放在 picturebox的resize时间里

每次picturebox大小改变都重画一次坐标

Dim b As New Bitmap(PictureBox1.Width, PictureBox1.Height)

Dim g As Graphics = Graphics.FromImage(b)

g.Clear(Color.White)

Dim p As New Pen(Color.Black)

p.EndCap = Drawing2D.LineCap.ArrowAnchor

g.DrawLine(p, 30, PictureBox1.Height - 30, 30, 30)

g.DrawLine(p, 30, PictureBox1.Height - 30, PictureBox1.Width - 30, PictureBox1.Height - 30)

Dim i As Integer

Dim bs As New SolidBrush(Color.Green)

Dim po As New Point

po.X = 0

po.Y = PictureBox1.Height - 35

For i = 700 To 1000 Step 50

g.DrawString(i, Me.Font, bs, po.X, po.Y)

g.DrawLine(p, po.X + 28, po.Y + 5, po.X + 30, po.Y + 5)

po.Y -= (PictureBox1.Height - 100) / 6

Next

po.X = 30

po.Y = PictureBox1.Height - 30

For i = 0 To 40 Step 5

g.DrawString(i, Me.Font, bs, po.X, po.Y + 5)

g.DrawLine(p, po.X, po.Y + 2, po.X, po.Y)

po.X += (PictureBox1.Width - 100) / 8

Next

PictureBox1.Image = b

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