WPFTextBoxAutoComplete

An attached behavior for WPF's TextBox control that provides auto-completion suggestions from a given collection

How to use this library:

1. Install the package via NuGet

       PM> Install-Package WPFTextBoxAutoComplete

2. Add a reference to the library in your view

       xmlns:behaviors="clr-namespace:WPFTextBoxAutoComplete;assembly=WPFTextBoxAutoComplete"

3. Create a textbox and bind the "AutoCompleteItemsSource" to a collection of IEnumerable<String>

       <TextBox 
           Width="250"
           HorizontalAlignment="Center"
           Text="{Binding TestText, UpdateSourceTrigger=PropertyChanged}" 
           behaviors:AutoCompleteBehavior.AutoCompleteItemsSource="{Binding TestItems}" 
       />

4. (Optional) Set the "AutoCompleteStringComparison" property, which is of type StringComparison

       <TextBox 
           Width="250"
           HorizontalAlignment="Center"
           Text="{Binding TestText, UpdateSourceTrigger=PropertyChanged}" 
           behaviors:AutoCompleteBehavior.AutoCompleteItemsSource="{Binding TestItems}" 
           behaviors:AutoCompleteBehavior.AutoCompleteStringComparison="InvariantCultureIgnoreCase"
       />

5. (Optional) Set the "AutoCompleteIndicator" property, which is a String. This is used to indicate to the behavior that it should start making auto-completion suggestions.

       <TextBox 
           Width="250"
           HorizontalAlignment="Center"
           Text="{Binding TestText, UpdateSourceTrigger=PropertyChanged}" 
           behaviors:AutoCompleteBehavior.AutoCompleteItemsSource="{Binding TestItems}" 
           behaviors:AutoCompleteBehavior.AutoCompleteIndicator="@"
       />

Now, every time the "TestText" property of your datacontext is changed, WPFTextBoxAutoComplete will provide you with auto-completion suggestions. To accept a suggestion, just hit "enter".