export image size regenerates plot

[MattG]

I've been using Tchart->Export->Image->PNG->Width and Height to control the size of exported images. When these are different than the displayed plot size, the exporter regenerates the plot, changing the number of gridlines, etc.

Is there a way to specify an export size that results in resampling the original plot instead, i.e., just changing the export resolution without changing the contents of the plot?

[Christopher]

Hello,

Is there a way to specify an export size that results in resampling the original plot instead, i.e., just changing the export resolution without changing the contents of the plot?

Maybe the easiest way to do this would be to export to a Bitmap and then resize, e.g.

Code: Select all

    private void button1_Click(object sender, EventArgs e)
    {
      Bitmap bmp = ResizeImage(tChart1.Bitmap, new Size(1200, 900));
      bmp.Save(@"C:\tmp\MyPNG.png", System.Drawing.Imaging.ImageFormat.Png); 
    }

    public Bitmap ResizeImage(Bitmap imgToResize, Size size)
    {
      Bitmap b = new Bitmap(size.Width, size.Height);
      using (Graphics g = Graphics.FromImage((Image)b))
      {
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Default;  //change this if necessary
        g.DrawImage(imgToResize, 0, 0, size.Width, size.Height);
      }
      return b;
    }