RadMenu for ASP.NET
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Data Binding > ArrayList

Glossary Item Box

Binding Telerik RadMenu to a data source of type which implements IEnumerable such as Array or ArrayList is flat databinding because only root items are created and there is no hierarchy.

Here is a general outline of such databinding:

  1. Create the collection.
  2. Add string values to the collection and set the DataSource property of Telerik RadMenu to the instance of the collection.
  3. Call the DataBind() method.

The text from the collection is then automatically mapped to the Text property of the respective menu item.

If you have a collection (ArrayList, array or in fact any collection implementing ICollection or IEnumerable) that contains objects (as opposed to string values), you can take advantage of the DataTextField, DataNavigateUrlField, and the DataValueField properties to map a property from the object directly to the Text, NavigateUrl or Value fields.

If you need to map additional properties from the object to other properties of the respective menu item, you have to subscribe to the ItemDataBound event. The event arguments passed to the event, e.Item and e.Item.DataItem, hold the instance of the menu item being bound and the DataItem associated with the menu item. You can then map a property from the DataItem (make sure to cast the DataItem object to your respective data type first) to the property of the RadMenuItem class.

Example:

C# Copy Code
private ArrayList GenerateArrayList()
{
   ArrayList itemsList = new ArrayList();
   itemsList.Add("One");
   itemsList.Add("Two");
   itemsList.Add("Three");

   return itemsList;
}

protected void Page_Load(object sender, EventArgs e)
{
   if (!IsPostBack)
   {
       RadMenu1.DataSource = GenerateArrayList();
       RadMenu1.DataBind();
   }
}
        
VB.NET Copy Code
Private Function GenerateArrayList() As ArrayList
    Dim itemsList As New ArrayList()
    itemsList.Add("One")
    itemsList.Add("Two")
    itemsList.Add("Three")
    Return itemsList
End Function 'GenerateArrayList

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Not IsPostBack Then

        RadMenu1.DataSource = GenerateArrayList()
        RadMenu1.DataBind()

        End If
End Sub

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