How to display a PNG from a file?

Question

I want to switch the image that is displayed on a toolStripButton. But I juste can't find how to do that.

I think it should be something like:

btSearch.Image = new Image("myimage.png");

But it doesn't work ( new Image seems not to exist).

Thank you for your help

score 6 · Answer 1 · edited May 23 '17 at 12:04

6

Use Image.FromFile():

btSearch.Image = Image.FromFile("myimage.png");

Unfortunately, the file will be locked until you dispose the image. For another solution, see the question, ToolStripButton: what's wrong with assigning an image programmatically.

edited May 23 '17 at 12:04

Community

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answered Apr 12 '11 at 02:27

Mark Cidade

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**Not recommended!** The file remains locked until the Image is disposed. Better to use another method that doesn't lock the file. – Only Bolivian Here Apr 12 '11 at 02:34
Do you have any method to recommend? Or maybe it's best to copy the file, use the copy then dispose? – Mathieu Apr 12 '11 at 02:36
@Mathieu: I added an example of how to load an image from a stream. – Only Bolivian Here Apr 12 '11 at 02:44

score 2 · Accepted Answer · edited May 23 '17 at 12:26

I recommend the Image.FromStream() method as it doesn't lock the actual file.

For example:

using (var stream = File.OpenRead(path))
using (var image = Image.FromStream(stream))
{
    //Black magic here.
}

Note that you must keep the stream open for the lifetime of the Image. The stream is reset to zero if this method is called successively with the same stream.

Here's a previous discussion with an answer from Jon Skeet.

How to display a PNG from a file?

2 Answers2