Drawing some line to draw a flow diagrams on my asp.net web page.

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Hi guys,

I want to draw a flow diagram which will shows the production and consumption values of the steel plants.

Plant1's output value will be the plant2's input value.

I want to connect to those plants by means of line which will be created dynamically.

And by clicking those lines it will forwarded to some other pages.

Plant can be an image/Button.

So, guys please reply as soon as possible.

Thanks in advance.

Posted 23-Jul-13 2:37am

nandiashis

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joshrduncan2012 23-Jul-13 9:16am

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Kumar Pankaj Verma · Answer 1 · 2013-07-23T18:49:00

1. Place a Image Control on web page.

<asp:image runat="server" id="imgData" xmlns:asp="#unknown" />

2. Create "Bitmap" object on code side.

C#

Bitmap b =new Bitmap(width, height);

3. Create "Graphics" object with the help that "Bitmap".

C#

Graphics g = Graphics.FromImage(b);

4. Now Use "Graphics" objects methods for drawing boxes & lines ... etc.

C#

g.FillRectangle(new SolidBrush(Color.White), new Rectangle(0, 0, width, height));
g.DrawEllipse(Pens.LightGray, 0, 0, 50, 50);
g.DrawLine(Pens.LightGray, 0, 2, 50, 100);

5. Save the "Bitmap" to Disk on any path using save method of "Bitmap" object.

C#

b.Save(Server.MapPath("~\\UserUploadedDocuments\\ImageIcon.jpeg"));

6. Set "imgData" control ImageUrl property to saved image path.

C#

imgData.ImageUrl = "UserUploadedDocuments\\ImageIcon.jpeg";

This will render a dynamic image as per your need.