Nested controls validation

[Gary]

Hi,
I have a detailsview with a radcombobox in the emptytemplate.  I want to validate this (I am using load on demand).  It seems I need to validate via javascript, but can not get this to working with examples you gave in other forums.  I want to prevent the users from typing in an incorrect code in the combo box - one that does not exist and pass validation.  Here's what I tried:

        function validateCombo(source, args)
        {
           args.IsValid = false;
           var elements = document.getElementsByTagName('*');
           var count = elements.length;
           var targetId = 'rcbCAGE';
           var i;
           for (i = 0; i < count; i++) {
                var element = elements[i];
                var pos = element.id.indexOf(targetId);
                if(pos >= 0 && element.type == 'text' ) {
                    //found rad combo element
                   var text = element.get_text();
                   var item = element.findItemByText(text);
                   if (item)
                   {
                       args.IsValid = true;
                   }
                }
        }

The line var text = element.get_test() throws an error that the method is not valid.

Here's a snippet of the HTML page:

        <asp:DetailsView ID="dvCageCode" DataKeyNames="CageCodeID" runat="server" AutoGenerateRows="False"
            DataSourceID="CAGEData" Height="50px" Width="337px"
            OnItemCommand="dvCageCode_ItemCommand"
            OnItemCreated="dvCageCode_ItemCreated"
            ondatabound="dvCageCode_DataBound"
            onitemupdating="dvCageCode_ItemUpdating"
            oniteminserting="dvCageCode_ItemInserting"
            OnItemInserted="OnItemInserted"
            OnItemUpdated="OnItemUpdated"
            CellPadding="10" CommandRowStyle-Height="50px"
                CommandRowStyle-VerticalAlign="Middle">

<CommandRowStyle VerticalAlign="Middle" Height="50px"></CommandRowStyle>

            <EmptyDataTemplate>
                <table>
                    <tr>
                        <td nowrap="nowrap">Cage Code:</td>
                        <td nowrap="nowrap">
                            <telerik:RadComboBox ID="rcbCAGE" runat="server" EnableLoadOnDemand="true" MarkFirstMatch="false"
                                    OnItemsRequested="rcb_ItemsRequested" OnSelectedIndexChanged="rcb_SelectedIndexChanged" AutoPostBack="true" ShowMoreResultsBox="true"  Skin="Mac" />
                            <asp:Label ID="lblCageRequired" runat="server" Text="*" CssClass="RequiredMark" Visible="true" />
                            <asp:RequiredFieldValidator ID="rValCageCode" runat="server" Text="Please select a CAGE Code" InitialValue="" ControlToValidate="rcbCAGE" ErrorMessage="*" Enabled="true" SetFocusOnError="true" ValidationGroup="Submit" Display="Dynamic" />
                            <asp:CustomValidator ID="cValCAGE"
                                runat="server"
                                ControlToValidate="rcbCAGE"
                                ValidateEmptyText="True"
                                ClientValidationFunction="validateCombo"
                                ErrorMessage="Please select a CAGE Code from the list">
                            </asp:CustomValidator>

                        </td>
                    </tr>
                </table>
            </EmptyDataTemplate>

Thanks in advance for your help.
Gary

[Rosi]

Hello Gary,

I suggest you use Telerik.Web.UI.RadComboBox.ComboBoxes array to access the comboboxes and edit your code by the following way:

function validateCombo(source, args)
        {
           args.IsValid = false;

           var i;
           for (i = 0; i < Telerik.Web.UI.RadComboBox.ComboBoxes.length; i++) {
                var combo= Telerik.Web.UI.RadComboBox.ComboBoxes[i];
                var pos = element.id.indexOf(targetId);
                                    //found rad combo element
                   var text = combo.get_element().get_text();
                   var item = combo.findItemByText(text);
                   if (item)
                   {
                       args.IsValid = true;
                   }

        }

Regards,
Rosi
the Telerik team

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