creating lines dynamically

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Hi, I have a user control that has picture boxes. Those picture boxes are added according as to how many pictures are saved in xml file. Meaning to say, My user control loads the content of my xml file. Now that I can load the picture boxes by means of creating instances, my goal now is to create a line that connects specific picture boxes.

For example, the pbox 1 connects to pbox 5 and pbox 3. That's it. Do I have to user the paint event? or is there any codes available. Help me.

Pointers will be appreciated, Thanks :)

Posted 27-Dec-10 15:31pm

yummy02

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Sergey Alexandrovich Kryukov 27-Dec-10 21:43pm

System.Windows.Forms or WPF?!!

Dr.Walt Fair, PE 27-Dec-10 21:52pm

In WinForms you can use the DrawLine method.

Sergey Alexandrovich Kryukov 27-Dec-10 23:11pm

You're right, Walt; and for WPF this is not a problem at all; for example, all object on Canvas are 1st-class citizen.

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JOAT-MON · Accepted Answer · 2010-12-27T15:51:00

Solution 1

Yep, you will need to hook into the Paint event and add logic to to draw the lines onto the Graphics object that is passed into it through the PaintEventArgs. Here's an example, but you will need to change it to draw the lines that you need:

private void Form1_Paint ( object sender, PaintEventArgs e )
{
     Graphics g = e.Graphics;

     Point point_from = new Point ( x1, y1 );
     Point point_to = new Point ( x2, y2 );

     g.DrawLine ( Pens.Black, point_from, point_to );
}

Posted 27-Dec-10 15:51pm

JOAT-MON

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yummy02 27-Dec-10 21:53pm

Thanks JOAT-MON. By the way, what's with point_from and point_to?

JOAT-MON 27-Dec-10 22:01pm

Just miscellaneous variable names for points to use in the drawing...you can use any name you want to. I used those for the example to show the direction of the line drawing. They represent the endpoints of the line you want to draw.

Dalek Dave 27-Dec-10 23:10pm

Good Answer

yummy02 28-Dec-10 2:19am

by the way, can I create an instance of lines that will connect pictureboxes?

JOAT-MON 28-Dec-10 13:45pm

What you will be creating are a series of lines that look like they connect PictureBoxes. So the coordinates you assign to the endpoints when you draw the lines should be on the border of the PictureBoxes that you want to connect.

Abhinav S · Accepted Answer · 2010-12-27T17:40:00

Solution 2

See here[^] as well.

Posted 27-Dec-10 17:40pm

Abhinav S