Hello,
This is a follow on bug I found whilst investigating [this one](https://htmlrenderer.codeplex.com/workitem/9037). The sample project I attached to that issue can also be used to repro this one.
Apologies but I haven't dug through the code to find the exact cause, or indeed to raise a pull request with a fix.
I assume you are using the standard `Image.FromFile` method or similar to load a source image. The problem with this approach is that it [actually locks the source file](http://stackoverflow.com/a/3845491/148962), so that you cannot modify it or delete it etc.
If you open up the demo project I provided in the other issue, you can see I copy a source image to a temporary file, and use that in the HTML for the control. Then, in `OnFormClosing` I attempt to clean up by deleting the temp file. In this method you'll notice I have a call to `htmlPanel.Dispose`. If you remove this call, you'll then find that the `File.Delete` call will crash as the file is in use.
I tend to work around this by creating a copy of the image, that way I can dispose of the original image, thus releasing the file in case I want to save over it, or delete it, and so on. Then I just ensure I dispose of the copy as usual.
Regards;
Richard Moss
Comments: I know of it but it is not a bug but a way .NET loads images where if the image is formatted in some way the original stream must be available at later point. If you are 100% sure your images do not suffer from this issue you can override the image loading using ImageLoad event and load the image yourself. Hope it help, Cheers.
This is a follow on bug I found whilst investigating [this one](https://htmlrenderer.codeplex.com/workitem/9037). The sample project I attached to that issue can also be used to repro this one.
Apologies but I haven't dug through the code to find the exact cause, or indeed to raise a pull request with a fix.
I assume you are using the standard `Image.FromFile` method or similar to load a source image. The problem with this approach is that it [actually locks the source file](http://stackoverflow.com/a/3845491/148962), so that you cannot modify it or delete it etc.
If you open up the demo project I provided in the other issue, you can see I copy a source image to a temporary file, and use that in the HTML for the control. Then, in `OnFormClosing` I attempt to clean up by deleting the temp file. In this method you'll notice I have a call to `htmlPanel.Dispose`. If you remove this call, you'll then find that the `File.Delete` call will crash as the file is in use.
I tend to work around this by creating a copy of the image, that way I can dispose of the original image, thus releasing the file in case I want to save over it, or delete it, and so on. Then I just ensure I dispose of the copy as usual.
Regards;
Richard Moss
Comments: I know of it but it is not a bug but a way .NET loads images where if the image is formatted in some way the original stream must be available at later point. If you are 100% sure your images do not suffer from this issue you can override the image loading using ImageLoad event and load the image yourself. Hope it help, Cheers.