Getting Started with Silverlight Breadcrumb

This tutorial will walk you through the creation of a RadBreadcrumb.

Assembly References

In order to use RadBreadcrumb in your projects, you have to add references to the following assemblies:

• Telerik.Windows.Controls
• Telerik.Windows.Controls.Navigation

You can find more info here.

Define a Breadcrumb control

Example 1 demonstrates a basic RadBreadcrumb definition.

Example 1: Defining a RadBreadcrumb in XAML

<telerik:RadBreadcrumb x:Name="breadcrumb" Header="Breadcrumb Header" HorizontalAlignment="Stretch" VerticalAlignment="Top"/> 

Example 2: Defining a RadBreadcrumb in code

RadBreadcrumb breadcrumb = new RadBreadcrumb(); 
breadcrumb.Header = "Breadcrumb Header"; 
breadcrumb.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch; 
breadcrumb.VerticalAlignment = System.Windows.VerticalAlignment.Top; 

Dim breadcrumb As New RadBreadcrumb() 
breadcrumb.Header = "Breadcrumb Header" 
breadcrumb.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch 
breadcrumb.VerticalAlignment = System.Windows.VerticalAlignment.Top 

The RadBreacrumb control is a HeaderedItemsControl and its Header is used as a root element. Therefore the control always has one root element. If you don't set the Breadcrumb.Header property an empty root element will be created.

So far there is an empty RadBreadcrumb containing no items.

Add and remove items (RadBreadcrumbItem controls) and set their Header and DropDownHeader properties

You can add items to the RadBreadcrumb control by defining RadBreadcrumbItem controls inside the RadBreadcrumb definition in XAML:

Example 3: Adding RadBreadcrumbItems in XAML

<telerik:RadBreadcrumb Header="Breadcrumb Header" HorizontalAlignment="Stretch" VerticalAlignment="Top"> 
    <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1" DropDownHeader="DropDownItem 1"> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1.1" DropDownHeader="DropDownItem 1.1"/> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1.2" DropDownHeader="DropDownItem 1.2" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1.3" DropDownHeader="DropDownItem 1.3" /> 
    </telerik:RadBreadcrumbItem> 
    <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2" DropDownHeader="DropDownItem 2"> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2.1" DropDownHeader="DropDownItem 2.1" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2.2" DropDownHeader="DropDownItem 2.2" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2.3" DropDownHeader="DropDownItem 2.3" /> 
    </telerik:RadBreadcrumbItem> 
    <telerik:RadBreadcrumbItem Header="BreadcrumbItem 3" DropDownHeader="DropDownItem 3" /> 
</telerik:RadBreadcrumb> 

Or you can populate the RadBreadcrumb.Items collection in code-behind:

Example 4: Adding RadBreadcrumbItems in code

RadBreadcrumbItem item1 = new RadBreadcrumbItem() { Header = "BreadcrumbItem 1", DropDownHeader = "DropDownItem 1" }; 
item1.Items.Add(new RadBreadcrumbItem() { Header = "BreadcrumbItem 1.1", DropDownHeader = "DropDownItem 1.1" }); 
item1.Items.Add(new RadBreadcrumbItem() { Header = "BreadcrumbItem 1.2", DropDownHeader = "DropDownItem 1.2" }); 
item1.Items.Add(new RadBreadcrumbItem() { Header = "BreadcrumbItem 1.3", DropDownHeader = "DropDownItem 1.3" }); 
breadcrumb.Items.Add(item1); 
RadBreadcrumbItem item2 = new RadBreadcrumbItem() { Header = "BreadcrumbItem 2", DropDownHeader = "DropDownItem 2" }; 
item2.Items.Add(new RadBreadcrumbItem() { Header = "BreadcrumbItem 2.1", DropDownHeader = "DropDownItem 2.1" }); 
item2.Items.Add(new RadBreadcrumbItem() { Header = "BreadcrumbItem 2.2", DropDownHeader = "DropDownItem 2.2" }); 
item2.Items.Add(new RadBreadcrumbItem() { Header = "BreadcrumbItem 2.3", DropDownHeader = "DropDownItem 2.3" }); 
breadcrumb.Items.Add(item2); 
RadBreadcrumbItem item3 = new RadBreadcrumbItem() { Header = "BreadcrumbItem 3", DropDownHeader = "DropDownItem 3" }; 
breadcrumb.Items.Add(item3); 

Dim item1 As New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 1",  
        Key .DropDownHeader = "DropDownItem 1"  
} 
item1.Items.Add(New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 1.1",  
        Key .DropDownHeader = "DropDownItem 1.1"  
}) 
item1.Items.Add(New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 1.2",  
        Key .DropDownHeader = "DropDownItem 1.2"  
}) 
item1.Items.Add(New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 1.3",  
        Key .DropDownHeader = "DropDownItem 1.3"  
}) 
breadcrumb.Items.Add(item1) 
 
Dim item2 As New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 2",  
        Key .DropDownHeader = "DropDownItem 2"  
} 
item2.Items.Add(New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 2.1",  
        Key .DropDownHeader = "DropDownItem 2.1"  
}) 
item2.Items.Add(New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 2.2",  
        Key .DropDownHeader = "DropDownItem 2.2"  
}) 
item2.Items.Add(New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 2.3",  
        Key .DropDownHeader = "DropDownItem 2.3"  
}) 
breadcrumb.Items.Add(item2) 
 
Dim item3 As New RadBreadcrumbItem() With {  
        Key .Header = "BreadcrumbItem 3",  
        Key .DropDownHeader = "DropDownItem 3"  
} 
breadcrumb.Items.Add(item3) 

In order to remove items from the RadBreadcrumb control, you can remove them from the control's Items collection:

Example 5: Removing RadBreadcrumbItems

breadcrumb.Items.Remove(item2); 

breadcrumb.Items.Remove(item2) 

Enable LinearMode

By default the RadBreadcrumb control has two modes - normal and text mode. In the normal mode you can navigate through the Breadcrumb.Items using the BreadcrumbItems and their dropdown content, while in the text mode you can enter the path that you want to navigate to. The control also provides a Linear mode in which the BreadcrumbItem DropDown Items collection is hidden. In Linear mode you can navigate through the Items collection of the control by taking advantage of the text mode of the RadBreadcrumb, using its history, using the key navigation or setting the destination path from code-behind.

In order to enable the Linear mode of the RadBreadcrumb control, you have to set the IsLinearMode property to True :

Example 6: Enabling linear mode in XAML

<telerik:RadBreadcrumb  Header="Breadcrumb Header" HorizontalAlignment="Stretch" 
        VerticalAlignment="Top" IsLinearMode="True"> 
    <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1" DropDownHeader="DropDownItem 1"> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1.1" DropDownHeader="DropDownItem 1.1" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1.2" DropDownHeader="DropDownItem 1.2" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 1.3" DropDownHeader="DropDownItem 1.3" /> 
    </telerik:RadBreadcrumbItem> 
    <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2" DropDownHeader="DropDownItem 2"> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2.1" DropDownHeader="DropDownItem 2.1" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2.2" DropDownHeader="DropDownItem 2.2" /> 
        <telerik:RadBreadcrumbItem Header="BreadcrumbItem 2.3" DropDownHeader="DropDownItem 2.3" /> 
    </telerik:RadBreadcrumbItem> 
    <telerik:RadBreadcrumbItem Header="BreadcrumbItem 3" DropDownHeader="DropDownItem 3" /> 
</telerik:RadBreadcrumb> 

Example 7: Enabling linear mode in code

breadcrumb.IsLinearMode = true; 

breadcrumb.IsLinearMode = True 

Change the number of paths saved in the Breadcrumb history

By default the RadBreadcrumb control keeps a history of 10 visited paths. If you want to increase or decrease this number, you can set the HistorySize property:

Example 8: Setting the history size in XAML

<telerik:RadBreadcrumb Header="Breadcrumb Header" HorizontalAlignment="Stretch" 
        VerticalAlignment="Top" HistorySize="15"> 
    ... 
</telerik:RadBreadcrumb> 

Example 9: Setting the history size in code

breadcrumb.HistorySize = 15; 

breadcrumb.HistorySize = 15 

Setting a Theme

The controls from our suite support different themes. You can see how to apply a theme different than the default one in the Setting a Theme help article.

Changing the theme using implicit styles will affect all controls that have styles defined in the merged resource dictionaries. This is applicable only for the controls in the scope in which the resources are merged.

To change the theme, you can follow the steps below:

• Choose between the themes and add reference to the corresponding theme assembly (ex: Telerik.Windows.Themes.Fluent.dll). You can see the different themes applied in the Theming examples from our Silverlight Controls Examples application.

• Merge the ResourceDictionaries with the namespace required for the controls that you are using from the theme assembly. For the RadBreadcrumb, you will need to merge the following resources:

  • Telerik.Windows.Controls
  • Telerik.Windows.Controls.Navigation

Example 2 demonstrates how to merge the ResourceDictionaries so that they are applied globally for the entire application.

Example 2: Merge the ResourceDictionaries

<Application.Resources> 
    <ResourceDictionary> 
        <ResourceDictionary.MergedDictionaries> 
            <ResourceDictionary Source="/Telerik.Windows.Themes.Fluent;component/Themes/System.Windows.xaml"/> 
            <ResourceDictionary Source="/Telerik.Windows.Themes.Fluent;component/Themes/Telerik.Windows.Controls.xaml"/> 
            <ResourceDictionary Source="/Telerik.Windows.Themes.Fluent;component/Themes/Telerik.Windows.Controls.Navigation.xaml"/> 
        </ResourceDictionary.MergedDictionaries> 
    </ResourceDictionary> 
</Application.Resources> 

Alternatively, you can use the theme of the control via the StyleManager.

Figure 2 shows a RadBreadcrumb with the Fluent theme applied.

Figure 2: RadBreadcrumb with the Fluent theme

See Also

• Overview
• Features Overview