File Picker

[Abhi-95]

Describe the bug

Code : https://github.com/microsoft/WinUI-Gallery/blob/main/WinUIGallery/ControlPages/FilePickerPage.xaml.cs

// Create a file picker
var openPicker = new Windows.Storage.Pickers.FileOpenPicker();

// Retrieve the window handle (HWND) of the current WinUI 3 window.
var window = WindowHelper.GetWindowForElement(this);
var hWnd = WinRT.Interop.WindowNative.GetWindowHandle(window);

// Initialize the file picker with the window handle (HWND).
WinRT.Interop.InitializeWithWindow.Initialize(openPicker, hWnd);

// Set options for your file picker
openPicker.ViewMode = PickerViewMode.Thumbnail;
openPicker.FileTypeFilter.Add("*");

// Open the picker for the user to pick a file
var file = await openPicker.PickSingleFileAsync();
if (file != null)
{
PickAFileOutputTextBlock.Text = "Picked file: " + file.Name;
}
else
{
PickAFileOutputTextBlock.Text = "Operation cancelled.";

}

Error:
System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Microsoft.Windows.SDK.NET
StackTrace:
at WinRT.Interop.IWindowNativeMethods.get_WindowHandle(Object _obj)
at WinRT.Interop.WindowNative.GetWindowHandle(Object target)
at Orchid.Views.HomePage.<OpenFile_Click>d__4.MoveNext()

What are the step to handle File Picker?

To Reproduce

No response

Additional context

No response

Applies to the following platforms:

• WinUI
• WPF
• UWP

About your setup

No response