Binding Basics (WPF)

Binding Basics: Unfortunately this note will not be for raw beginners with no understanding of WPF.

Let’s Look carefully:

• We want to the TextBlock to show us: (i) a string stored in a Resource and (ii) The Operating System Version.

• These values are obtained with data binding.

• We must specify the property we are binding to using the Path property, and the Source using the Source Property. We must bind to an element in the control.

• If we are using a resource we must use the StaticResource key of the relevant resource.

• If we are using a system property we must get it as a static variable.

See below for examples:

// Shows the namespaces and the resources
<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:s="clr-namespace:System;assembly=mscorlib"
        xmlns:t="clr-namespace:System.Threading;assembly=mscorlib"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>        
        <s:String x:Key="val">I will follow_him</s:String>
    </Window.Resources>
</Window>

// Shows databinding
<Grid>
        <StackPanel>
            <!--<TextBlock Text="{Binding Path=CurrentCulture, Source={x:Static t:Thread.CurrentThread }}" ></TextBlock>-->   
            <TextBlock Text="{Binding Path=Length, Source={StaticResource val}}"></TextBlock>
            <TextBlock Text="{Binding Path=VersionString, Source={x:Static s:Environment.OSVersion}}"></TextBlock>
        </StackPanel>
    </Grid>

Written on June 21, 2017