IMultiValueConverter In Silverlight:-

Silverlight does not support IMultiValueConverter.There may be scenorios like binding the label with FullName using FirstName and LastName propertys.So we can achieve this using Dependency Propertys.

->Create a User class.

public class User

 {

        public string FirstName { get; set; }

        public string LastName { get; set; }

}

->Create a MyLabel class and inherit from Label class.

 public class MyLabel : Label

    {

        //Full name property.

        public string FullName

        {

            get

            {

                return (string)GetValue(FullNameProperty);

            }

            set

            {

                SetValue(FullNameProperty, value);

            }

        }

        //Dependency property for fullname.

        public static readonly DependencyProperty FullNameProperty = DependencyProperty.Register("FullName", typeof(string), typeof(MyLabel), null);

        //Constructor.

        public MyLabel()

        {

            //Adding load event.

            Loaded += new RoutedEventHandler(MyLabel_Loaded);

        }

        //Load event.

        void MyLabel_Loaded(object sender, RoutedEventArgs e)

        {

            //Add the fullname and lastname.

            this.Content = FullName + this.Content;

        }

    }

->Add the MyLabel control in xaml for FullName.

<UserControl x:Class="SilverlightIMultiValueConverter.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d"

    d:DesignHeight="300" d:DesignWidth="400" Loaded="UserControl_Loaded"

             xmlns:dep="clr-namespace:SilverlightIMultiValueConverter">

    <Grid x:Name="LayoutRoot" Background="White">

        <ListBox Name="lstUsers">

            <ListBox.ItemTemplate>

                <DataTemplate>

                    <Grid>

                        <Grid.ColumnDefinitions>

                            <ColumnDefinition Width="50"></ColumnDefinition>

                            <ColumnDefinition Width="50"></ColumnDefinition>

                            <ColumnDefinition Width="100"></ColumnDefinition>

                        </Grid.ColumnDefinitions>

                        <TextBlock Grid.Column="0" Text="{Binding Path=FirstName}"></TextBlock>

                        <TextBlock Grid.Column="1" Text="{Binding Path=LastName}"></TextBlock>

                        <dep:MyLabel Grid.Column="2" FullName="{Binding FirstName}" Content="{Binding Path=LastName}"></dep:MyLabel>

                    </Grid>

                </DataTemplate>

            </ListBox.ItemTemplate>

        </ListBox>

    </Grid>

</UserControl>

->In user control load event bind the listbox.

        private void UserControl_Loaded(object sender, RoutedEventArgs e)

        {

            //User list

            List<User> lstUser = new List<User>();

            //Adding users.

            lstUser.Add(new User() { FirstName = "David", LastName = "Jackson});

            lstUser.Add(new User() { FirstName = "ANDERSON", LastName = "ANDI"});

            lstUser.Add(new User() { FirstName = "ANDRA", LastName = "Jackson”});

            //Set the itemsource here.

            lstUsers.ItemsSource = lstUser;

        }

Let me know, if you have any feedback. Mail me for source code. Enjoy reading my articles…

sekhartechblog@gmail.com