MainPage.xaml.cs

using System.Net.Mail;
using System.Runtime.CompilerServices;
using DevExpress.Maui.Controls;

namespace EditFormExample
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
        }
        private void ValidateCustomerProperties(object sender, DevExpress.Maui.DataForm.DataFormPropertyValidationEventArgs e)
        {
            if (e.PropertyName == "Email" && e.NewValue != null)
            {
                MailAddress res;
                if (!MailAddress.TryCreate((string)e.NewValue, out res))
                {
                    e.HasError = true;
                    e.ErrorText = "Invalid email";
                }
            }
        }

        private void ToolbarItem_Clicked(object sender, EventArgs e)
        {
            dataForm.Commit();
        }

        private void ImageTapped(object sender, EventArgs e)
        {
            bottomSheet.State = BottomSheetState.HalfExpanded;
        }

        private async void DeletePhotoClicked(object sender, EventArgs args)
        {
            await Dispatcher.DispatchAsync(() => {
                bottomSheet.State = BottomSheetState.Hidden;
                editControl.IsVisible = false;
                preview.Source = null;
            });
        }

        private async void SelectPhotoClicked(object sender, EventArgs args)
        {
            var photo = await MediaPicker.PickPhotoAsync();
            await ProcessResult(photo);
            editControl.IsVisible = true;
        }

        private async void TakePhotoClicked(object sender, EventArgs args)
        {
            if (!MediaPicker.Default.IsCaptureSupported)
                return;

            var photo = await MediaPicker.Default.CapturePhotoAsync();
            await ProcessResult(photo);
            editControl.IsVisible = true;
        }

        private async Task ProcessResult(FileResult result)
        {
            await Dispatcher.DispatchAsync(() => {
                bottomSheet.State = BottomSheetState.Hidden;
            });


            if (result == null)
                return;

            ImageSource imageSource = null;
            if (System.IO.Path.IsPathRooted(result.FullPath))
                imageSource = ImageSource.FromFile(result.FullPath);
            else
            {
                var stream = await result.OpenReadAsync();
                imageSource = ImageSource.FromStream(() => stream);
            }
            var editorPage = new ImageEditView(imageSource);
            await Navigation.PushAsync(editorPage);

            var cropResult = await editorPage.WaitForResultAsync();
            if (cropResult != null)
                preview.Source = cropResult;

            editorPage.Handler.DisconnectHandler();
        }
    }
}