Image save file to project files

Question

Image save file to project files

Dani_S 4,341

Hi,

How do I save image file (png) in runtime to running project.

Thanks,

(net 8).

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Answer 1

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 49,766 Microsoft External Staff

Hello,

How do I save image file (png) in runtime to running project.

For file saving, there are two types of saving: implicit and explicit.

For implicit saving, the user doesn't need to manually select the save path of the file, e.g. download, cache file. In this case, you can use FileSystem to save the file directly to the cache folder or application folder. Please refer to File system helpers for more detailed information.

For display saving, the user needs to choose by himself to which folder the file will be saved. If this is the case, you can use the official FileSaver Api provided by Maui to realize this function.

Best Regards,

Alec Liu.

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Dani_S 4,341 Reputation points

2024-08-13T10:10:30.7033333+00:00
why is not working- file exsit

var logoFilePath = Path.Combine(Path.Combine(@"C:\ProgramData\Sasa-Software\DesktopClient", "GssdLogo.png"));

// Take image from program data

if (File.Exists(logoFilePath))

{

FileInfo fi = new FileInfo(logoFilePath); LogoImage = ImageSource.FromStream(()=> fi.OpenRead());

}
Dani_S 4,341 Reputation points

2024-08-13T10:27:22.69+00:00

logoimage of typeimage source.
Dani_S 4,341 Reputation points

2024-08-13T10:40:18.6733333+00:00
also this not working

if (File.Exists(logoFilePath))

{

LogoImage = ImageSource.FromFile(logoFilePath);

}

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 49,766 Microsoft External Staff

I tested it using both of the ways you gave, and the result is that they both work as expected and show pictures.

If your image doesn't appear, it could be due to two reasons:

The file is not in the file path, so the code is not executed.
There is no way to implement a way for the LogoImage to notify of property changes, so the page cannot respond to changes in bound properties.

You could refer to the following documentation and code.

private ImageSource logoImage;
public ImageSource LogoImage
{
    get
    {
        return logoImage;
    }
    set
    {
        if (logoImage != value)
        {
            logoImage = value;
            OnPropertyChanged(); // reports this property
        }
    }
}

public void OnPropertyChanged([CallerMemberName] string name = "") =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));

public ClockViewModel()
{
    var logoFilePath = Path.Combine(Path.Combine(@"C:\ProgramData\Sasa-Software\DesktopClient", "GssdLogo.png"));
    if (File.Exists(logoFilePath))
    {
        FileInfo fi = new FileInfo(logoFilePath);
        LogoImage = ImageSource.FromStream(() => fi.OpenRead());
    }
}

Data binding and MVVM

Dani_S 4,341 Reputation points

2024-08-14T05:45:35.4666667+00:00

It works
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 49,766 Reputation points Microsoft External Staff

2024-08-14T07:20:21.0566667+00:00

Thanks for your feedback.

May I know whether your issue has been solved or not? If you're still having problems, please explain in detail what is still going wrong and what you need help with.
Dani_S 4,341 Reputation points

2024-08-14T08:06:55.8933333+00:00

Solved.thanks.
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 49,766 Reputation points Microsoft External Staff

2024-08-14T09:28:09.5333333+00:00

Thanks for your feedback.

Could you please accept this answer? It will help others in the community who are experiencing the same problem.

Answer 2

Bruce (SqlWork.com) 73,181

Use the file system helpers

https://learn.microsoft.com/en-us/dotnet/maui/platform-integration/storage/file-system-helpers?view=net-maui-8.0&tabs=windows

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Image save file to project files

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