Separators
Defining separators
To make a RadComboBoxItem separator you should simply mark the item with IsSeparator="True"
<telerik:radcombobox
id="RadComboBox1"
runat="server"
height="140px"
width="150px"
accesskey="T"
tabindex="1"
tooltip="Select a city">
<Items>
<telerik:RadComboBoxItem runat="server" IsSeparator="True" Text="Animals" />
<telerik:RadComboBoxItem runat="server" Text="pig" />
<telerik:RadComboBoxItem runat="server" Text="dog" />
<telerik:RadComboBoxItem runat="server" IsSeparator="True" Text="Birds" />
<telerik:RadComboBoxItem runat="server" Text="Eagle" />
</Items>
<CollapseAnimation Duration="200" Type="OutQuint" />
</telerik:radcombobox>
RadComboBoxItem item = new RadComboBoxItem();
item.Text = "Separator";
item.IsSeparator = true;
Dim item As RadComboBoxItem = New RadComboBoxItem()
item.Text = "Separator"
item.IsSeparator = true
Client-side methods
At the client-side, you can check whether an item is a separator using the get_isSeperator() method:
var comboBox = $find("<%=RadComboBox1.ClientID %>");
var item = comboBox.findItemByText("Separator");
if (item.get_isSeparator()) {
alert("The item is a separator");
}
To make an item a separator, you can use the set_isSeparator() method:
var comboBox = $find("<%=RadComboBox1.ClientID %>");
var item = comboBox.findItemByText("Separator");
item.set_isSeparator(true);
Css Classes
The CSS class applied to the RadComboBox separators is called:
rcbSeparator
To define your custom appearance you should simply add a style to the <head> tag of your aspx page holding the combobox:
<style>
.rcbSeparator
{
//you custom definition, i.e. color: red !important;
}
</style>