TemplateColumn.FilterDisplayTemplate Property
Gets or sets a template that specifies which custom layout to display in a column’s filter within the auto-filter row. This is a bindable property.
Namespace: DevExpress.Maui.DataGrid
Assembly: DevExpress.Maui.DataGrid.dll
NuGet Package: DevExpress.Maui.DataGrid
Declaration
public DataTemplate FilterDisplayTemplate { get; set; }
Property Value
Type | Description |
---|---|
DataTemplate | The template. |
Remarks
The CellData class specifies the binding context for this template.
Example
The following example shows how to filter template column values by a combo-box value. To do this, the example implements a custom combo-box editor used to apply filters, and customizes the appearance of the selected filter value after a filter is applied:
The example uses the following API members to replicate the grid as in the image above:
- DisplayTemplate - Specifies TemplateColumn value appearance.
FilterDisplayTemplate
- Specifies a template that configures the filter value’s appearance in the auto filter row.- FilterEditTemplate - Specifies a custom editor used to filter column values in the auto filter row.
<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:dxe="clr-namespace:DevExpress.Maui.Editors;assembly=DevExpress.Maui.Editors"
xmlns:dxc="clr-namespace:DevExpress.Maui.Controls;assembly=DevExpress.Maui.Controls"
xmlns:ios="clr-namespace:Microsoft.Maui.Controls.PlatformConfiguration.iOSSpecific;assembly=Microsoft.Maui.Controls"
ios:Page.UseSafeArea="True"
xmlns:local="clr-namespace:DataGridExample"
x:Class="DataGridExample.MainPage">
<ContentPage.Resources>
<local:StatusToBrushConverter x:Key="converter"/>
<x:Array Type="{x:Type local:State}" x:Key="StateItems">
<local:State>Green</local:State>
<local:State>Yellow</local:State>
<local:State>Red</local:State>
</x:Array>
<DataTemplate x:Key="StatusTemplate">
<Grid>
<Ellipse HeightRequest="32" WidthRequest="32" Margin="2"
HorizontalOptions="Center" VerticalOptions="Center"
Fill="{Binding Value,Converter={StaticResource converter}}"
Stroke="DarkGray" StrokeThickness="1"/>
</Grid>
</DataTemplate>
</ContentPage.Resources>
<Grid>
<dxg:DataGridView ItemsSource="{Binding Items}"
ShowAutoFilterRow="True" ShowFilterIcon="True">
<dxg:DataGridView.Columns>
<dxg:TextColumn FieldName="Name"/>
<dxg:TemplateColumn FieldName="Status"
DisplayTemplate="{StaticResource StatusTemplate}"
FilterDisplayTemplate="{StaticResource StatusTemplate}" >
<dxg:TemplateColumn.FilterEditTemplate>
<DataTemplate>
<Grid>
<dxe:ComboBoxEdit ItemsSource="{StaticResource StateItems}"
UseItemTemplateAsDisplayItemTemplate="True"
BorderThickness="0"
ClearIconVisibility="Always"
SelectedItem="{Binding Value}" >
<dxe:ComboBoxEdit.ItemTemplate>
<DataTemplate>
<Grid>
<Ellipse HeightRequest="32" WidthRequest="32" Margin="2"
HorizontalOptions="Center" VerticalOptions="Center"
Fill="{Binding Path=., Converter={StaticResource converter}}"
Stroke="DarkGray" StrokeThickness="1"/>
</Grid>
</DataTemplate>
</dxe:ComboBoxEdit.ItemTemplate>
</dxe:ComboBoxEdit>
</Grid>
</DataTemplate>
</dxg:TemplateColumn.FilterEditTemplate>
</dxg:TemplateColumn>
</dxg:DataGridView.Columns>
</dxg:DataGridView>
</Grid>
</ContentPage>
using Microsoft.Maui.Controls;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System;
using Microsoft.Maui.Graphics;
namespace DataGridExample {
public partial class MainPage : ContentPage {
public MainPage() {
InitializeComponent();
this.BindingContext = new MainViewModel();
}
}
public class MainViewModel {
protected ObservableCollection<State> _StateItems;
public ObservableCollection<State> StateItems {
get {
if (this._StateItems == null) {
this._StateItems = new ObservableCollection<State> {
State.Green,
State.Yellow,
State.Red
};
}
return this._StateItems;
}
}
public MainViewModel() {
Random r = new Random();
int i = -1;
while (++i < 40) {
var item = new SomeItem();
item.Name = $"Item {i}";
item.Status = (State)r.Next(3);
Items.Add(item);
}
}
protected ObservableCollection<SomeItem> _Items;
public ObservableCollection<SomeItem> Items {
get {
if (this._Items == null) {
this._Items = new ObservableCollection<SomeItem>();
}
return this._Items;
}
}
}
public class SomeItem : INotifyPropertyChanged {
protected string _Name;
public string Name {
get {
return this._Name;
}
set {
if (this._Name != value) {
this._Name = value;
this.OnPropertyChanged("Name");
}
}
}
protected State _Status;
public State Status {
get {
return this._Status;
}
set {
if (this._Status != value) {
this._Status = value;
this.OnPropertyChanged("Status");
}
}
}
public void OnPropertyChanged(string info) {
if (this.PropertyChanged != null) {
this.PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
public event PropertyChangedEventHandler PropertyChanged;
}
public enum State {
Green,
Yellow,
Red
}
public class StatusToBrushConverter : IValueConverter {
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
if (value is State status) {
switch (status) {
case State.Green:
return new SolidColorBrush(Colors.Green);
case State.Yellow:
return new SolidColorBrush(Colors.Yellow);
case State.Red:
return new SolidColorBrush(Colors.Red);
default:
break;
}
};
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
throw new NotImplementedException();
}
}
}
See Also