Render Image of UI Control in C1PrintDocument

First step is to capture an image of the control on the form with optional zoom setting.

// Method to convert control into an image  
static Image GetControlImage(Control ctl, float zoom)  
{  
    // get image  
    Rectangle rc = ctl.ClientRectangle;  
    Bitmap bmp = new Bitmap(rc.Width, rc.Height);  
    ctl.DrawToBitmap(bmp, rc);  

    // apply zoom  
    if (zoom != 1)  
    {  
        Size newSize = Size.Round(new SizeF(bmp.Width * zoom, bmp.Height * zoom));  
        bmp = new Bitmap(bmp, newSize);  
    }  

    // return image  
    return bmp;  
}

Second step is to draw the image into a C1PrintDocument component.

//PrintDocument for C1PrintPreviewControl  
C1PrintDocument doc = new C1PrintDocument();  
doc.DefaultUnit = UnitTypeEnum.Inch;  
doc.PageLayout.PageSettings.TopMargin = 0.5;  
doc.PageLayout.PageSettings.LeftMargin = 0.5;  
doc.PageLayout.PageSettings.RightMargin = 0.5;  
doc.PageLayout.PageSettings.BottomMargin = 0.5;   

//Renders C1FlexGrid control image to document
RenderImage ri = new RenderImage();  
ri.Image = GetControlImage(c1FlexGrid1, 1);  
ri.Width = doc.PageLayout.PageSettings.Width.Value-1;  
doc.Body.Children.Add(ri);