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POgetting System.Runtime.InteropServices.ExternalException!
 

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  1. POgetting System.Runtime.InteropServices.ExternalException!
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    <p>I am trying to paint the image and save it by using the mouse click event. I added a button to undo the last paint operation. I am performing this operation by loading the previously saved image by mouse click event. I have a code here... I'll show the part where i get the exception in comments in the code:</p> <pre><code>private void pictureBox1_MouseClick(object sender, MouseEventArgs e) { rect.Width = 0; rect.Height = 0; pictureBox1.Invalidate(); pictureBox1.Image.Save(String.Format("{0}.Bmp",textBox2.Text )); //getting exception here!! int radius = 10; //Set the number of pixel you want to use here //Calculate the numbers based on radius int x0 = Math.Max(e.X - (radius / 2), 0), y0 = Math.Max(e.Y - (radius / 2), 0), x1 = Math.Min(e.X + (radius / 2), pictureBox1.Width), y1 = Math.Min(e.Y + (radius / 2), pictureBox1.Height); Bitmap bm = pictureBox1.Image as Bitmap; //Get the bitmap (assuming it is stored that way) for (int ix = x0; ix &lt; x1; ix++) { for (int iy = y0; iy &lt; y1; iy++) { bm.SetPixel(ix, iy, Color.Black); //Change the pixel color, maybe should be relative to bitmap } } pictureBox1.Refresh(); //Force refresh } </code></pre> <p>the code under button is:</p> <pre><code>private void button2_Click(object sender, EventArgs e) { pictureBox1.Load(string.Format("{0}.Bmp",textBox2.Text)); } </code></pre> <p>In my program I tried to save the image first and then painted it. When I click the button it is working &amp; loading the image, but when I again tried to paint it, there I am getting the exception. Please help where I need to change the code.</p>
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