C＃如何从图片框中获取位图

Question

I have a image in picturebox. I want to get that image as a Bitmap.

My one line code is:

Bitmap default_image = (Bitmap)pictureBox5.Image.Clone();

But what i am getting is:

default_image value=null;

Can anyone help me.

Answer 1

Bitmap default_image = new Bitmap(pictureBox5.Image);

你永远不会实例化一个Bitmap ，这就是为什么它是null 。

Answer 2

If you got the image into the PictureBox by using imageLocation

pbSourceImage.ImageLocation = openFile.FileName;

then PictureBox.Image will be null.

Instead, load the picture using

pbSourceImage.Image = Image.FromFile(openFile.FileName);

Then you will be able to clone from the Image property.

Answer 3

This is because you do not have image, probably you have BackgroundImage . You need to have Image properties fill with your picture.