What are resources in WPF?

Answer

Resources are objects referred in WPF XAML. In C# code when we create an object we do the following three steps :-

using CustomerNameSpace; // import the namespace.

Customer obj = new Customer(); // Create object of the class

Textbox1.text = obj.CustomerCode; // Bind the object with UI elements

So even in WPF XAML to define resources which are nothing but objects we need to the above 3 steps :-

• Import namespace where the class resides: - To define namespace we need to use the “xmlns” attribute as shown in the below XAML code.

<Window x:Class="LearnWpfResources.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:custns="clr-namespace:LearnWpfResources"
        Title="MainWindow" Height="350" Width="525">

• Create object of the class :- To create an object of the class in XAML we need to create a resource by using the resource tag as the below code. You can the object name is ‘custobj”.

<Window.Resources>
<custns:Customer x:Key="custobj"/>
</Window.Resources>

The above code you can map to something like this in C#

Customer custobj = new Customer(); 

• Bind the object with UI objects :- Once the object is created we can then bind them using bindings like one way , two way as explained in “Explain one way, two way, one time and one way to source?” question explained above.

<TextBox Text="{Binding CustomerCode, Mode=TwoWay, Source={StaticResource custobj}}" />