How to save a picturebox control as a jpeg file after it's edited
.net, c#, picturebox
Solution
You probably shouldn't draw directly on the PictureBox.
You need to use a Bitmap instead. Try putting the bitmap in the PictureBox.Image and then call Save().
Check this for more details
Problem
I have a `PictureBox` on my Windows Forms application. I load a picture in it and I have enabled the `Paint` event in my code. It draws a rectangle. Like this: ``` private void pictureBox1_Paint(object sender, PaintEventArgs e) { Graphics gr = e.Graphics; Pen p = new Pen(Color.Red); p.Width = 5.0f; gr.DrawRectangle(p, 1, 2, 30, 40); } ``` And I click the "save" button: ``` private void button2_Click(object sender, EventArgs e) { pictureBox1.Image.Save(@"C:\Documents and Settings\tr1g3800\Desktop\WALKING\30P\100000test.jpg",ImageFormat.Jpeg); } ``` But the saved file never contains the rectangle that I drew. Does anyone have any idea?