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Xamarin.Forms CollectionView Alternating Row Colors
source link: https://xamarinhowto.com/xamarin-forms-collectionview-alternating-row-colors/?utm_campaign=xamarin-forms-collectionview-alternating-row-colors
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Xamarin.Forms CollectionView Alternating Row Colors
Very quick Xamarin How-To this week with a simple converter. Alternating row colours in a CollectionView is quite often a design requirement and I wanted to create a simple, reusable converter to solve this.
The Converter
using System;
using System.Globalization;
using System.Linq;
using Xamarin.Forms;
namespace XhtCollectionViewAlternatingRowColor.Converters
public class IndexToColorConverter : IValueConverter
public Color EvenColor { get; set; }
public Color OddColor { get; set; }
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
var collectionView = parameter as CollectionView;
return collectionView.ItemsSource.Cast<object>().ToList().IndexOf(value) % 2 == 0 ? EvenColor : OddColor;
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
throw new NotImplementedException();
Using the Converter in XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage Title="Alternating Row Colors"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:converters="clr-namespace:XhtCollectionViewAlternatingRowColor.Converters"
xmlns:local="clr-namespace:XhtCollectionViewAlternatingRowColor"
x:Class="XhtCollectionViewAlternatingRowColor.MainPage">
<ContentPage.Resources>
<converters:IndexToColorConverter x:Key="IndexToColorConverterGrid"
EvenColor="#0D92DB"
OddColor="White"/>
<converters:IndexToColorConverter x:Key="IndexToColorConverterText"
EvenColor="White"
OddColor="Black"/>
</ContentPage.Resources>
<ContentPage.BindingContext>
<local:MainViewModel/>
</ContentPage.BindingContext>
<ContentPage.Content>
<CollectionView x:Name="MyCollectionView"
ItemsSource="{Binding Items}">
<CollectionView.ItemTemplate>
<DataTemplate>
<Grid BackgroundColor="{Binding ., Converter={StaticResource IndexToColorConverterGrid}, ConverterParameter={x:Reference MyCollectionView}}">
<Label Text="{Binding .}"
TextColor="{Binding ., Converter={StaticResource IndexToColorConverterText}, ConverterParameter={x:Reference MyCollectionView}}"
Margin="20"/>
</Grid>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</ContentPage.Content>
</ContentPage>
There you go, nice and simple, easy to follow and reuse! As always full source code available here.
About the Author: Toby Field
Toby has recently dived into the IT industry after graduating from QUT with a distinction in 2020. His passion & willingness to learn, drives his quality and career. Toby currently lives in Brisbane and is excited to see what the city has to offer in this growing IT hub.
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