Статья: ASP.NET пример построения круговой диаграммы

Dim fnt As New Font("Arial", 8)

Dim sb As New SolidBrush(Color.Blue)

g.Clear(Color.White)

g.SmoothingMode = SmoothingMode.HighQuality

' суммазначенийвмассиве

For i = 0 To arrData.GetUpperBound(0)

total = total + arrData(i)

Next

' проценты

For i = 0 To arrData.GetUpperBound(0)

arrProcent(i) = Math.Round((arrData(i)/total)*100)

Next

For i = 0 To arrProcent.GetUpperBound(0)

sub_total = sub_total + arrProcent(i)

pie_size = sub_total*360 / 100 - start_angle

g.FillPie(New SolidBrush(arrColor(i)), offset, offset, diameter, diameter, start_angle, pie_size)

start_angle = start_angle + pie_size

rect = New Rectangle(offset + diameter + 10, offset + i*20, 15, 15)

g.FillRectangle(New SolidBrush(arrColor(i)), rect)

g.DrawString(arrTitle(i) & " - [" & arrProcent(i) & "%]", fnt, sb, offset + diameter + 10 + 20, offset + i*20)

Next

bmp.Save(Response.OutputStream, ImageFormat.Jpeg)

g.Dispose()

bmp.Dispose()

Response.End()

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Результат работы скрипта: