Commit Image error the value of '102' is not valid for 'value'

[i2i8]

When I commit install.wim, it cannot unmount normally
DismApi.UnmountImage(mountedImageInfo.MountPath, commitChanges: true, progressCallback: ImageProgressCallback);
the error is as follows:

System. Argumentoutofrangeexception: the value of '102' is not valid for 'value'. 'value' should be between'minimum'and'maximum'. (Parameter 'value')

When I discard install.wim, it can unmount normally
DismApi.UnmountImage(mountedImageInfo.MountPath, commitChanges: false, progressCallback: ImageProgressCallback);

[jeffkl]

Does ImageProgressCallback do something special? Is the managed DISM API here on the callstack for the exception?

[jeffkl]

This line is probably throwing:

MoHelper.ProgressBar.Value = progress.Current;

I'm not sure why but the DISMAPI value for progress.Current is not always 0-100. If you want to safely calculate progress by percent, you'll need to probably use Total and divide by Current?

The documentation doesn't specify what values to expect: https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/dism/dismprogresscallback?view=windows-11

[i2i8]

I didn't fully understand the instructions in the link above. Can you give some examples?

[i2i8]

Like this?
MoHelper.ProgressBar.Value = progress.Total / progress.Current;

[i2i8]

Like this? If it looks like this, the error is as follows:
System.DivideByZeroException: Attempted to divide by zero.

[i2i8]

From the above code, you can get a sense of what I want to achieve. I am not sure if the code I wrote is elegant, can you give me an elegant implementation of MountImage or UnMountImage saving method?

[hdensity]

A bit late to the game, but it might help others. Regarding the issue of the progressCallback, it depends a bit on what granularity you want to achieve.

For integer precision percent values (no decimal point), you can do the following:

MoHelper.ProgressBar.Value = Math.Clamp(progress.Current * 100 / progress.Total, 0, 100);

For higher granularity, you can do this instead, replacing <digits> with the number of required digits after the decimal point.

float percent = Single.Clamp((float)progress.Current * 100 / progress.Total, 0, 100);
MoHelper.ProgressBar.Value = Single.Round(percent, <digits>, MidpointRounding.ToPositiveInfinity);