how to draw a line in .net like photoshop

Posted by Shanky11 under C# on 9/24/2013 | Points: 10 | Views : 1832 | Status : [Member] | Replies : 1

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how to draw a line like photoshop on a picture
length ishould bu dynamic
user will scroll that line like in photshop

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Posted by: Sheonarayan on: 9/24/2013 [Administrator] HonoraryPlatinum | Points: 25

0	Hi Shanky, Drawing lines are possible in C#, however if you really need real time you might be using HTML5 Cavas with the help of JavaScript. Read more about HTML5 Canvas here http://www.dotnetfunda.com/articles/show/1940/introduction-to-canvas-in-html5. To draw a line in C#, you can follow below approach Bitmap image = new Bitmap(width, count); Graphics g = null; try { g = Graphics.FromImage(image); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; Font f = new Font("Arial", textSize, FontStyle.Regular); SolidBrush b = new SolidBrush(Color.SkyBlue); g.FillRectangle(b, 0, 0, 400, count); g.DrawString(textToWrite, f, Brushes.Blue, 2, 5); g.DrawLine(new Pen(Color.Blue, 1), new Point(5, 25), new Point(100, 0)); g.DrawLine(new Pen(Color.White, 1), new Point(60, 10), new Point(120, 28)); f.Dispose(); image.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); } catch (Exception ee) { context.Response.Write(ee.Message.ToString()); } finally { image.Dispose(); g.Dispose(); } Notice DrawLine in the above code snippet. Hope this helps. Thanks Regards, Sheo Narayan http://www.dotnetfunda.com Shanky11, if this helps please login to Mark As Answer. \| Alert Moderator

Hi Shanky,

Drawing lines are possible in C#, however if you really need real time you might be using HTML5 Cavas with the help of JavaScript. Read more about HTML5 Canvas here http://www.dotnetfunda.com/articles/show/1940/introduction-to-canvas-in-html5.

To draw a line in C#, you can follow below approach

Bitmap image = new Bitmap(width, count);
            Graphics g = null;
            try
            {
                g = Graphics.FromImage(image);
                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                Font f = new Font("Arial", textSize, FontStyle.Regular);
                SolidBrush b = new SolidBrush(Color.SkyBlue);
                g.FillRectangle(b, 0, 0, 400, count);
                g.DrawString(textToWrite, f, Brushes.Blue, 2, 5);
                g.DrawLine(new Pen(Color.Blue, 1), new Point(5, 25), new Point(100, 0));
                g.DrawLine(new Pen(Color.White, 1), new Point(60, 10), new Point(120, 28));  
                
                f.Dispose();
                image.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

            }
            catch (Exception ee)
            {
                context.Response.Write(ee.Message.ToString());
            }
            finally
            {
                image.Dispose();
                g.Dispose();
            }

Notice DrawLine in the above code snippet.

Hope this helps.

Thanks

Regards,
Sheo Narayan
http://www.dotnetfunda.com

Shanky11, if this helps please login to Mark As Answer. | Alert Moderator

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