Question

<dx:ASPxComboBox ID="ASPxComboBox2" runat="server" ClientIDMode="AutoID" 
            SelectedIndex="-1" onselectedindexchanged="ASPxComboBox1_SelectedIndexChanged1" > 
        <ClientSideEvents SelectedIndexChanged="function(s, e) {
    grid.SelectRows();}" />            
                                 <Items>                                    
                                 <dx:ListEditItem Text="Selecte All Rows" /> 
                                 <dx:ListEditItem Text="UnselectAll" />                              
                                 </Items>
              </dx:ASPxComboBox>

I want to write event for the “unselect all” item in combobox. How can I do this?

Answer 1

You’ll need to write a JavaScript function that iterates thru the combo-box
and marks all selected items as false.

See Select/unselect all checkbox fields using pure Javascript and HTML for sample code

MSDN: Working with Client-Side Script