Custom Markup Extensions in Silverlight 5: Part 2

In this post we will see how we can pass the parameters using Custom Markup Extensions .

Now that we have a understanding of how Custom Markup Extensions work in Silverlight lets quickly get into the code .

I modify my class FirstCME as shown as below :

public class FirstCME : IMarkupExtension<string>
{
public object value1 { get; set; }

public object value2 { get; set; }

public string ProvideValue(IServiceProvider serviceProvider)
{
double _val1 = Convert.ToDouble(value1);
double _val2 = Convert.ToDouble(value2);

return (_val1 + _val2).ToString();
}
}

Go ahead and modify the xaml to pass the value to the parameters . It would look like below :

<UserControl x:Class="SLCustomMarkup.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:SLCustomMarkup"
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">

<Grid x:Name="LayoutRoot" Background="White">
<TextBlock Text="{local:FirstCME value1=10,value2=20}"></TextBlock>
</Grid>
</UserControl>

Lets give it a run and see the output :

The above xaml code could be modified as shown below : It would still work the same way . Here we pass the parameters in a Angular Bracket < > Format .

Lets now give it a run :

In the next post on Custom Markup Extensions we will see what are the advantages of Custom Markup Extensions . Thanks . Happy Coding.