## Introduction DevExpress WPF is a powerful control library, but it has its learning curve. After years of working with it, I've gathered some practical tips. ## GridControl - Basics ### Auto-generated columns ```xml ``` ### Custom cell templates ```xml ``` ## Async Loading Don't block UI when loading data: ```csharp public async Task LoadDataAsync() { IsLoading = true; try { var data = await _service.GetDataAsync(); await Application.Current.Dispatcher.InvokeAsync(() => { Items = new ObservableCollection(data); }); } finally { IsLoading = false; } } ``` ## Theming Set theme globally in App.xaml.cs: ```csharp protected override void OnStartup(StartupEventArgs e) { ApplicationThemeHelper.ApplicationThemeName = Theme.VS2019DarkName; base.OnStartup(e); } ``` ## MVVM with DXMessageBox ```csharp public class DialogService : IDialogService { public MessageBoxResult ShowConfirm(string message) { return DXMessageBox.Show( message, "Confirmation", MessageBoxButton.YesNo, MessageBoxImage.Question); } } ``` ## Export to Excel ```csharp private void ExportToExcel() { var dialog = new SaveFileDialog { Filter = "Excel files (*.xlsx)|*.xlsx", DefaultExt = "xlsx" }; if (dialog.ShowDialog() == true) { GridControl.View.ExportToXlsx(dialog.FileName); } } ``` ## Performance Tips 1. **VirtualizingPanel** - always enabled for large lists 2. **DeferredScrolling** - for very large grids 3. **Binding Mode=OneWay** - where possible 4. **FrozenColumns** - limit the count