ASPxComboBox.Columns Property

Provides access to the editor’s column collection.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v18.2.dll

Declaration

C#

public ListBoxColumnCollection Columns { get; }

VB.NET

Public ReadOnly Property Columns As ListBoxColumnCollection

Property Value

Type	Description
ListBoxColumnCollection	A ListBoxColumnCollection object which represents the collection columns within the editor.

Remarks

This property is a wrapper of the ComboBoxProperties.Columns property.

Example

The following example demonstrates how to use the ASPxAutoCompleteBoxBase.TextFormatString property for a ASPxComboBox which contains several columns. The text of the selected ASPxComboBox item displayed within the input box is formatted by the ASPxAutoCompleteBoxBase.TextFormatString property. This property value is specified with respect to the selected ASPxRadioButtonList item. The complete sample project is available in the DevExpress Code Central database at E1331.

ASPX

...
<script runat="server">
    protected void ASPxRadioButtonList1_SelectedIndexChanged(object sender, EventArgs e) {
        if (ASPxRadioButtonList1.SelectedIndex == 0) { 
            ASPxComboBox1.TextFormatString = "{0} {1}, {2} Company";   
        }
        if (ASPxRadioButtonList1.SelectedIndex == 1) { 
            ASPxComboBox1.TextFormatString = "{1} {0}, {2} Company";
        }      
    }
 </script>
...
        <dxe:ASPxRadioButtonList ID="ASPxRadioButtonList1" runat="server" 
            onselectedindexchanged="ASPxRadioButtonList1_SelectedIndexChanged" 
            ClientInstanceName="rbl">
            <ClientSideEvents SelectedIndexChanged="function(s, e) {
                e.processOnServer=true;
            }" />
            <Items>
                <dxe:ListEditItem Text="FirstName LastName, Company" Value="Format1" />
                <dxe:ListEditItem Text="LastName FirstName, Company" Value="Format2" />
            </Items>
        </dxe:ASPxRadioButtonList>
        <br/>
        <dxe:ASPxComboBox ID="ASPxComboBox1" runat="server" 
            DataSourceID="AccessDataSource1" EnableIncrementalFiltering="True" 
            TextFormatString="{0} {1}, {2} Company" ValueType="System.String" Width="450px">
            <Columns>
                <dxe:ListBoxColumn Caption="First Name" FieldName="FirstName" 
                    Name="FirstName" />
                <dxe:ListBoxColumn Caption="Last Name" FieldName="LastName" Name="LastName" />
                <dxe:ListBoxColumn Caption="Company" FieldName="Company" Name="Company" />
            </Columns>
        </dxe:ASPxComboBox>
...