DataGridViewCommands.ShowFilteringUIForm Property

Returns the command that invokes the filter form for the DataGrid.

Namespace: DevExpress.Maui.DataGrid

Assembly: DevExpress.Maui.DataGrid.dll

NuGet Package: DevExpress.Maui.DataGrid

Declaration

public Command ShowFilteringUIForm { get; }

Property Value

Type	Description
Command	A command object.

Remarks

You can also call the ShowFilteringUIForm() method to invoke the filter form.

Before you use the ShowFilteringUIForm command/method, specify the FilteringUITemplate property to define the template that implements the filter form.

Handle the FilteringUIFormShowing event if you want to fine-tune the filter form based on a condition before the form is invoked.

Example

The following example uses the FilteringUITemplate property to build a filter form. To invoke the filter form, call the ShowFilteringUIForm() method or use the ShowFilteringUIForm command.

MainPage.xaml

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:dxg="clr-namespace:DevExpress.Maui.DataGrid;assembly=DevExpress.Maui.DataGrid"
             xmlns:ios="clr-namespace:Microsoft.Maui.Controls.PlatformConfiguration.iOSSpecific;assembly=Microsoft.Maui.Controls"
             xmlns:local="clr-namespace:DXFilteringApp"
             ios:Page.UseSafeArea="true" NavigationPage.HasNavigationBar="False" Title=""
             x:Class= "DXFilteringApp.MainPage" >
    <ContentPage.BindingContext>
        <local:TestOrderRepository/>
    </ContentPage.BindingContext>
    <ContentPage.Content>
        <Grid RowDefinitions="50,*">
            <Button Text="Filter data" Grid.Row="0" 
                    Command="{Binding Source={Reference grid}, Path=Commands.ShowFilteringUIForm}"/>
            <dxg:DataGridView x:Name="grid" Grid.Row="1"
                              ItemsSource="{Binding Orders}" 
                              FilteringUITemplate="{DataTemplate local:FilterPage}">
                <dxg:TextColumn FieldName="ProductName" HeaderFontSize="14"/>
                <dxg:ComboBoxColumn FieldName="PackagingType" HeaderFontSize="14"/>
                <dxg:NumberColumn FieldName="Quantity" HeaderFontSize="14"/>
                <dxg:DateColumn FieldName="Date" HeaderFontSize="14"/>
                <dxg:CheckBoxColumn FieldName="FastDelivery" HeaderFontSize="14"/>
            </dxg:DataGridView>
        </Grid>
    </ContentPage.Content>
</ContentPage>

FilterPage.xaml

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:dxe="clr-namespace:DevExpress.Maui.Editors;assembly=DevExpress.Maui.Editors"
             x:Class="DXFilteringApp.FilterPage"
             Title="Filters" Shell.NavBarIsVisible="False">
    <Grid>
        <VerticalStackLayout>
            <dxe:FilterCheckedListPickerItem PickerTitle="Select product name" FieldName="ProductName" Text="Tap to select products"/>
            <dxe:FilterCheckedChipGroupItem FieldName="PackagingType" SelectAllWhenFilterIsNull="True"/>
            <dxe:FilterNumericRangeItem Text="Quantity" FieldName="Quantity"/>
            <dxe:FilterDateRangeItem Text="Order Date" FieldName="Date"/>
            <dxe:FilterCheckItem Text="Fast Delivery" FieldName="FastDelivery" />
        </VerticalStackLayout>
    </Grid>
</ContentPage>

Show BindingContext implementation

C#

using DevExpress.Maui.DataForm;
using System.Collections.ObjectModel;
using System.ComponentModel;
namespace DXFilteringApp;
public abstract class OrderRepository {
   readonly ObservableCollection<Order> orders;
   ObservableCollection<string> products = new ObservableCollection<string> { "Tofu", "Chocolade", "Ikura", "Chai", "Boston Crab >Meat", "Ravioli Angelo", "Ipon Coffee", "Queso Cabrales" };
   public OrderRepository() {
       this.orders = new ObservableCollection<Order>();
   }
   public ObservableCollection<Order> Orders {
       get { return orders; }
   }
   public ObservableCollection<string> Products { get { return products; } }
}
public class TestOrderRepository : OrderRepository {
   const int orderCount = 20;
   readonly Random random;
   public TestOrderRepository() : base() {
       this.random = new Random((int)DateTime.Now.Ticks);
       for (int i = 0; i < orderCount; i++)
           Orders.Add(GenerateOrder(i));
   }
   Order GenerateOrder(int number) {
       Order order = new Order(
           new DateTime(2022, 9, 1).AddDays(random.Next(0, 60)),
           number % 3 == 0,
           RandomItem<string>(Products),
           random.Next(1, 100),
           (PackagingType)random.Next(Enum.GetNames(typeof(PackagingType)).Length));
       return order;
   }
   T RandomItem<T>(IList<T> list) {
       int index = (int)(random.NextDouble() * 0.99 * (list.Count));
       return list[index];
   }
}
public class Order : INotifyPropertyChanged {
   string productName;
   DateTime date;
   bool fastDelivery;
   int quantity;
   PackagingType packagingType;
   public Order() {
       this.productName = "Tofu";
       this.date = DateTime.Today;
       this.fastDelivery = false;
       this.quantity = 0;
       this.packagingType = PackagingType.CardboardBox;
   }
   public Order(DateTime date, bool fastDelivery, string productName, int quantity, PackagingType packagingType) {
       this.productName = productName;
       this.date = date;
       this.fastDelivery = fastDelivery;
       this.quantity = quantity;
       this.packagingType = packagingType;
   }
   public string ProductName {
       get { return productName; }
       set {
           if (productName != value) {
               productName = value;
               RaisePropertyChanged("ProductName");
           }
       }
   }
   public int Quantity {
       get { return quantity; }
       set {
           if (quantity != value) {
               quantity = value;
               RaisePropertyChanged("Quantity");
           }
       }
   }
   [DataFormDateEditor(DisplayFormat = "{0:MMMM dd}")]
   public DateTime Date {
       get { return date; }
       set {
           if (date != value) {
               date = value;
               RaisePropertyChanged("Date");
           }
       }
   }
   public bool FastDelivery {
       get { return fastDelivery; }
       set {
           if (fastDelivery != value) {
               fastDelivery = value;
               RaisePropertyChanged("FastDelivery");
           }
       }
   }
   public PackagingType PackagingType {
       get { return packagingType; }
       set {
           if (packagingType != value) {
               packagingType = value;
               RaisePropertyChanged("PackagingType");
           }
       }
   }
   public event PropertyChangedEventHandler PropertyChanged;
   protected void RaisePropertyChanged(string name) {
       if (PropertyChanged != null)
           PropertyChanged(this, new PropertyChangedEventArgs(name));
   }
}
public enum PackagingType { CardboardBox, CorrugatedBox, ClingFilm, PlasticBox, Chipboard }