[Winform] How to Use picturebox to display a picture

When I recently read the program, I found that when I used picturebox images to display images, there will be "system. Drawing. image. fromfile <system. outofmemoryexception> insufficient memory .」 . Google, and someone found that they do not use image. fromfile, so log it here.

Assign provides picturebox. Image mirroring in the following ways:

Method 1: Use image. fromfile

Me.PictureBox1.Image = Image.FromFile("f:\img1.jpg")

 

 

Method 2: Use image. fromstream

 Dim fs As System.IO.FileStream = System.IO.File.OpenRead("f:\img1.jpg")

Me. picturebox1.image = image. fromstream (FS)

 fs.Close()

 

 

It is recommended that method 2 be used because method 1 is used. After assign is complete, the image watermark will still be locked, but method 2 won't.

You can use the following methods to visualize picturebox. Image,

Method 1: directly use picturebox. Image

If Not (Me.PictureBox1.Image Is Nothing) Then

Picturebox1.image. Dispose ()

    PictureBox1.Image = Nothing

End if

 

 

Method 2: pass through system. Drawing. Bitmap

Dim oldImg As System.Drawing.Bitmap = PictureBox1.Image

Picturebox1.image = nothing

If IsNothing(oldImg) = False Then

Oldimg. Dispose ()

End If

 

 

Before assign image to picturebox. image, you must first dispose the original image! Otherwise, memory will continue eating!

Exam

Picturebox dispose Problem

General error system. outofmemoryexception in GDI +: insufficient memory

Example

Download example