message-template-.net-maui.chat

This sample demonstrates how to display chat messages using user-defined templates in .NET MAUI Chat (SfChat).

Sample

<ContentPage.Resources>
    <ResourceDictionary>
        <local:ChatMessageTemplateSelector Chat="{x:Reference sfChat}" x:Key="templateSelector"/>
    </ResourceDictionary>
</ContentPage.Resources>

<ContentPage.BindingContext>
    <local:ViewModel/>
</ContentPage.BindingContext>

<ContentPage.Content>
    <sfChat:SfChat x:Name="sfChat"
                   Messages="{Binding Messages}"
                   CurrentUser="{Binding CurrentUser}"
                   MessageTemplate="{StaticResource templateSelector}"/>
</ContentPage.Content>

TemplateSelector:

    public class ChatMessageTemplateSelector : DataTemplateSelector
    {
        #region Fields

        private readonly DataTemplate? incomingDataTemplate;
        private readonly DataTemplate? outgoingDataTemplate;
        private readonly DataTemplate? ratingDataTemplate;

        #endregion

        #region Public Properties

        public SfChat? Chat { get; set; }
        #endregion

        #region Constructor
        public ChatMessageTemplateSelector()
        {
            this.incomingDataTemplate = new DataTemplate(typeof(IncomingMessageTemplate));
            this.outgoingDataTemplate = new DataTemplate(typeof(OutgoingMessageTemplate));
            this.ratingDataTemplate = new DataTemplate(typeof(RatingTemplate));
        }
        #endregion

        #region Override methods
        protected override DataTemplate? OnSelectTemplate(object item, BindableObject container)
        {
            var message = item as IMessage;
            if (message == null || Chat == null)
            {
                return null;
            }

            if (message.Author == Chat!.CurrentUser)
            {
                return outgoingDataTemplate;
            }
            else
            {
                if (item as ITextMessage != null)
                {
                    if ((item as ITextMessage)!.Text == "How would you rate your interaction with our travel bot?")
                    {
                        return ratingDataTemplate;
                    }
                    else
                    {
                        return incomingDataTemplate;
                    }
                }
                else
                {
                    return null;
                }
            }
        }
        #endregion
    }

Requirements to run the demo

To run the demo, refer to System Requirements for .NET MAUI

Troubleshooting:

Path too long exception

If you are facing path too long exception when building this example project, close Visual Studio and rename the repository to short and build the project.

License

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