.net Blazor Desktop folder picker? - wpf

Question

I am using a WPF Desktop app with BlazorWebView. I would like to open up file explorer and have the user select a folder to get the path selected. I can use the browser input to select files but as I understand it is a limitation of the browser to allow me to select a folder path. Is there a Folder Picker for native access?
The Process.Start only seem to open the file explorer and won't let me choose the folder.
<blazor:BlazorWebView HostPage="wwwroot\index.html" Services="{DynamicResource services}">
<blazor:BlazorWebView.RootComponents>
<blazor:RootComponent Selector="#app" ComponentType="{x:Type shared:App}" />
</blazor:BlazorWebView.RootComponents>
</blazor:BlazorWebView>
#using System.Diagnostics
<button #onclick="OnClickOpenNativeFileExplorer">Open</button>
#code {
private void OnClickOpenNativeFileExplorer(MouseEventArgs e)
{
Process.Start("explorer.exe");
}
}

Answer 1

For anyone wondering, I was able to solve it by doing the following.
I added the IFolderPicker interface to my razor class library. Then implement the FolderPicker in the WPF project using a NuGet package.
Install-Package WindowsAPICodePack-Shell -Version 1.1.1
public interface IFolderPicker
{
public string DisplayFolderPicker();
}
public class FolderPicker : IFolderPicker
{
public string DisplayFolderPicker()
{
var dialog = new CommonOpenFileDialog();
dialog.IsFolderPicker = true;
CommonFileDialogResult result = dialog.ShowDialog();
if (result == CommonFileDialogResult.Ok)
return dialog.FileName;
return "";
}
}
I then register the dependency using the DI container within the MainWindow.xaml.cs file.
public MainWindow()
{
InitializeComponent();
Application.Current.MainWindow.WindowState = WindowState.Maximized;
var serviceCollection = new ServiceCollection();
serviceCollection.AddWpfBlazorWebView();
serviceCollection.AddTransient<IFolderPicker, FolderPicker>();
Resources.Add("services", serviceCollection.BuildServiceProvider());
}
Then within the razor component, I have a button that calls the DisplayFolderPicker method.
#inject IFolderPicker _folderPicker
<button #onclick="OnClickOpenNativeFileExplorer">Open</button>
<p>#path</p>
#code {
private string path = "";
private void OnClickOpenNativeFileExplorer(MouseEventArgs e)
{
path = _folderPicker.DisplayFolderPicker();
}
}
Take-away: I suppose not only will this work for FolderPicker but for calling any native component.