Executing OnInit on selectedIndexchanged of radcombo

[Balaji]

Hi,

I am trying to load my second combobox based on the item selected from first combobox. The code goes something like this

Aspx page

<telerik:RadComboBox ID="DepartmentDD" runat="server" OnItemsRequested="DepartmentDD_ItemsRequested" OnClientSelectedIndexChanging="LoadSection" OnClientItemsRequested="ItemsLoaded" width="175px"/>


<telerik:RadComboBox ID="SectionDD" runat="server" OnItemsRequested="SectionDD_ItemsRequested" OnClientItemsRequested="ItemsLoaded" width="175px" />   


function ItemsLoaded(combo, eventarqs) {

    var secCombo = $find("SectionDD");
    if (combo.get_items().get_count() > 0) {
        combo.set_text(combo.get_items().getItem(0).get_text());
        combo.get_items().getItem(0).highlight();
    }
                    combo.showDropDown();
}


function LoadSection(combo, eventarqs) {
    var seccombo = $find("SectionDD");
    var item = eventarqs.get_item();

    seccombo .set_text("Loading...");
    seccombo .requestItems(item.get_value(), false);
}


---------

CS page


 protected void Page_Load(object sender, EventArgs e)
{

    LoadDepartment();

}
      

    protected void LoadDepartment()
        {
        //Loads department to DepartmentDD
        }


        protected void DepartmentDD_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e)
        {
            LoadDepartment();
        }

        protected void SectionDD_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e)
        {

            LoadSection(Convert.ToInt16(deptid));
        }

        protected void LoadSection(int deptId)
        {
            
          //Loads section to SectionDD
        }


The problem is when I reach SectionDD_ItemsRequested after selecting item from first combo the control is firing OnInit method which loads the deparment againg :(.

Where am I going wrong?

[Dimitar Terziev]

Hello Balaji,

You should place your LoadDepartment method inside the following conditional statement:

if (!Page.IsPostBack)
           {

               LoadDepartament();
           }

Please refer to the following demo implementing the same scenario.

Greetings,
Dimitar Terziev
the Telerik team