can uwp use openfile
public async Task GetFile()
{
Windows.Storage.Pickers.FileOpenPicker picker = new Windows.Storage.Pickers.FileOpenPicker();
picker.ViewMode = Windows.Storage.Pickers.PickerViewMode.List;
picker.FileTypeFilter.Add(".txt");
//Prompt the user to open the log file:
Windows.Storage.StorageFile logFile = await picker.PickSingleFileAsync();
try
{
using (var stream = await logFile.OpenStreamForReadAsync())
using (var reader = new StreamReader(stream))
{
var line = await reader.ReadLineAsync();
Debug.WriteLine($"The first line: {line} - waiting");
await Task.Delay(10000);
line = await reader.ReadLineAsync();
Debug.WriteLine($"The next line: {line} - waiting");
}
}
catch (Exception exc)
{
Debug.WriteLine($"Exception {exc.Message}");
}
}