Binding to Array or ArrayList

RadDropDownList can be bound either to Array or ArrayList. The following example shows how to bind RadDropDownList objects to both Array and ArrayList, at runtime.

The declaration of RadDropDownList objects includes no DataSourceID property or <items> section:

<telerik:RadDropDownList RenderMode="Lightweight" ID="RadDropDownList1" EmptySelectionMessage="sadasd" runat="server">
</telerik:RadDropDownList>
<telerik:RadDropDownList RenderMode="Lightweight" ID="RadDropDownList2" EmptySelectionMessage="sadasd" runat="server">
</telerik:RadDropDownList>

In the Page_Load event handler, create the Array and ArrayList, and bind them to the RadDropDownList objects. The DataBind method must be called after setting the DataSource property.

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        BindToArrayList(RadDropDownList1);
        BindToArray(RadDropDownList2);
    }
}

private void BindToArrayList(Telerik.Web.UI.RadDropDownList dropDownList)
{
    ArrayList itemsList = new ArrayList();
    itemsList.Add("One");
    itemsList.Add("Two");
    itemsList.Add("Three");
    dropDownList.DataSource = itemsList;
    dropDownList.DataBind();
}

private void BindToArray(Telerik.Web.UI.RadDropDownList dropDownList)
{
    string[] itemsList = { "One", "Two", "Three" };
    dropDownList.DataSource = itemsList;
    dropDownList.DataBind();
}

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
    If Not Page.IsPostBack Then
        BindToArrayList(RadDropDownList1)
        BindToArray(RadDropDownList2)
    End If
End Sub

Private Sub BindToArrayList(dropDownList As Telerik.Web.UI.RadDropDownList)
    Dim itemsList As New ArrayList()
    itemsList.Add("One")
    itemsList.Add("Two")
    itemsList.Add("Three")
    dropDownList.DataSource = itemsList
    dropDownList.DataBind()
End Sub

Private Sub BindToArray(dropDownList As Telerik.Web.UI.RadDropDownList)
    Dim itemsList As String() = {"One", "Two", "Three"}
    dropDownList.DataSource = itemsList
    dropDownList.DataBind()
End Sub