Codenstuff.com

Posted: **Wed Feb 12, 2014 8:28 pm**

it seems that this won't work :(

what are we doing wrong even i have no clue it seems working fine in vb.net this way but not in c#

Code: Select all

if (_clicked == false)
      {
          g.DrawImage(pictureBox2.Image, new Rectangle(0, 0, 39, 41));
      }
      else
      {
          g.DrawImage(pictureBox1.Image, new Rectangle(0, 0, 39, 41));
      }

Error is

System.NullReferenceException was unhandled
Message=Object reference not set to an instance of an object.

thank you

Posted: **Wed Feb 12, 2014 8:48 pm**

Make sure that g is initialized like so

Code: Select all

Graphics g = e.Graphics;
//-- Or like this
Graphics g = this.CreateGraphics();

And pictureBox1 and pictureBox2 have an image set. And also try not to draw images in DesignMode (it tends to slow down the Designer).

Posted: **Wed Feb 12, 2014 8:49 pm**

make sure you have this at the very top of your class code, then everything else below it.

Code: Select all

public Form1()
        {
            InitializeComponent();
        }

Posted: **Wed Feb 12, 2014 10:22 pm**

thanks you #smashapps this did the job

Codenstuff.com

drawimage help please

drawimage help please

Re: drawimage help please

Re: drawimage help please

Re: drawimage help please