C1 Community

I would like to create a thumbnail image of the plot without the extras (borders, legend, etc). Just a very compact image that shows only the series, which I guess is the PlotArea. There are numerous image related functions but they all seem to be for exporting the entire chart. Is there an easy way to do this, without changing to chart to minimize all margins? I see the PaintPlotArea event, but I don't think that will help.

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Jason D.
Senior Software Developer
The Transtec Group, Inc.

A possible solution is to generate an image of the entire chart, and knowing the location and size of the plot area, use bitmap graphics to crop the image.  Here is code to crop the plot area and display it in a Picturebox.

Imports System.Drawing
Imports System.Drawing.Imaging

1. Dim plotWidth As Integer = C1Chart1.ChartArea.PlotArea.Size.Width
2. Dim plotHeight As Integer = C1Chart1.ChartArea.PlotArea.Size.Height
3. Dim offsetX As Integer = C1Chart1.ChartArea.PlotArea.Location.X
4. Dim offsetY As Integer = C1Chart1.ChartArea.PlotArea.Location.Y
5. Dim img As Image = C1Chart1.GetImage
6. Dim bmp As New Bitmap(plotWidth, plotHeight, PixelFormat.Format24bppRgb)
7. Dim g As Graphics = Graphics.FromImage(bmp)
8. g.DrawImage(img, New Rectangle(0, 0, plotWidth, plotHeight), offsetX, offsetY, plotWidth, plotHeight, GraphicsUnit.Pixel)
9. PictureBox1.Image = bmp

To also scale it you can use the code above but just change two lines

'Scale to 50x40 thumbnail
6.  Dim bmp As New Bitmap(50, 40, PixelFormat.Format24bppRgb)
8.  g.DrawImage(img, New Rectangle(0, 0, 50, 40), offsetX, offsetY, plotWidth, plotHeight, GraphicsUnit.Pixel)

regards,
Greg L