位图（Int32，Int32，PixelFormat）引发ArgumentException

Question

I am trying to get a part of a screenshot but unfortunately I am getting ArgumentException when I am creating Bitmap . Here's a code :

public Bitmap bp(int x, int y, int width, int height)
{
   Bitmap bitmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
   using (Graphics g = Graphics.FromImage(bitmap))
   {
      g.CopyFromScreen(x, y, 0, 0, bitmap.Size, CopyPixelOperation.SourceCopy);
   }
   return bitmap;
}

When it's trying to make bitmap it throws:

ArgumentException. "Parameter isn't valid".

Can any one help to handle this ?

I Call this Function :

Bitmap ln = bp(Convert.ToInt32(textBox55.Text),     
 Convert.ToInt32(textBox56.Text), Convert.ToInt32(textBox59.Text) -  
 Convert.ToInt32(textBox55.Text), Convert.ToInt32(textBox56.Text) - 
 Convert.ToInt32(textBox60.Text));

I am getting Parameters from TextBox

Answer 1

You must be passing width and height as 0 to this method.

Width and height must be greater than 0.