[DannyTM]

So im trying to capture a region within my rectangle that is being drawn but the rectangle is not dissapearing quickly enough



All code currently:
http://pastebin.com/raw/LvMfNGGj

[Visual Freedom]

You should wait until the rectangle is actually invisible.

[DannyTM]

You should wait until the rectangle is actually invisible.

How exactly can i check for that?

[0xDEAD10CC]

You don't check for it, you've programmed it so that it takes the snapshot before the rectangle is drawn over to be no rectangle.

Code

private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            canResize = false;
            showrect = false;
            label2.Text = MousePosition.ToString();
            textBox1.Text += MousePosition.ToString();
            SnapshotImage(rect);
  
        }

All you do is showrect=false, but this won't get checked until the function returns unless you call Invalidate() before SnapshotImage(rect), and after showrect=false...

[DannyTM]

You don't check for it, you've programmed it so that it takes the snapshot before the rectangle is drawn over to be no rectangle.

Code

private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            canResize = false;
            showrect = false;
            label2.Text = MousePosition.ToString();
            textBox1.Text += MousePosition.ToString();
            SnapshotImage(rect);
  
        }

All you do is showrect=false, but this won't get checked until the function returns unless you call Invalidate() before SnapshotImage(rect), and after showrect=false...

Code

private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            this.Invalidate();
            canResize = false;
            showrect = false;
            this.Invalidate();
            label2.Text = MousePosition.ToString();
            textBox1.Text += MousePosition.ToString();
            SnapshotImage(rect);

        }

I tried that but that also doesn't work and still shows the red lines from the rectangle.

[Chappie]

I tried that but that also doesn't work and still shows the red lines from the rectangle.

Forgive my ignorance as far as some of this goes. But I'm bored and figured I would butt-in.

According to MSDN

Calling the Invalidate method does not force a synchronous paint; to force a synchronous paint, call the Update method after calling the Invalidate method. When this method is called with no parameters, the entire client area is added to the update region.

https://msdn.microsoft.com/en-us/library....110).aspx

Try calling this.Invalidate and then this.Update

Just shooting in the dark here.

[0xBB]

-snip

I tried that but that also doesn't work and still shows the red lines from the rectangle.

What do you mean by the red lines are still visible ? Like it cut through the screenshot itself or it's visible on the borders of the screenshot ? If it's visible on the border of the screenshot, that's normal since you are getting the size of your rectangle as area to shoot. Try to redefine the screen areas width/height to match a bit less than your visual display of the area.