Drop down event

[chithuraj]

Hi,
        I have Rad Dropdown. I am validating the Dropdown on Server side selected index change event, my problem is i am using custom validation. When the select dropdown and directly click next button, Then it needs two times to go on next page, Is there is any client events After firing serverside Index change event. in that client side event i have to make, args.isvalid=true.

Here is my sample code.

protected void RadComboBox1_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)
    {
        try
        {
            hdnReturnBackCatId1.Value = "0";
            RadComboBox1.SelectedItem.Text = RadTreeView1.SelectedNode.Text;
            RadComboBox1.SelectedItem.Value = RadTreeView1.SelectedNode.Value;
            bool blnRetVal = ValidatingForParentCategory(lblCat1, RadComboBox1);
            if (blnRetVal == true)
            {
                lblCat1.Visible = false;

                hdnParentCategoryId.Value = "1";
                RadComboBox1.SelectedIndex = 0;
                CustomValCategory1.ErrorMessage = "Please associate to child category";
            }
            else
            {

                lblCat1.Visible = false;
                hdnParentCategoryId.Value = "0";
               // RadComboBox1.OnClientDropDownClosed = "CloseRadCombo1";
               // CustomValCategory1.ClientValidationFunction = " false";
               // CustomValCategory1.ControlToValidate = " RadComboBox1";
              //  CustomValCategory1.ServerValidate += new ServerValidateEventHandler(this.ServerValidation);

            }
        }
        catch (Exception ex)
        {
            Master.LogError("AddNewproductsStep2.cs", "RadComboBox1_SelectedIndexChanged()", ex.Message + ":" + ex.StackTrace + ":" + ex.StackTrace);
        }
    }
clientside

<asp:UpdatePanel ID="UpdCat1" runat="server">
                                                                    <ContentTemplate>
                                                                        <asp:HiddenField ID="hdnParentCategoryId" runat="server" Value="1" />
                                                                        <telerik:RadComboBox OnClientDropDownClosing="CloseRadCombo1"   ID="RadComboBox1" Width="300px" runat="server" OnClientDropDownOpened="OnClientDropDownOpenedHandlerForCategory1"
                                                                             Style="vertical-align: middle;" AutoPostBack="true" ValidationGroup="Category1Group"
                                                                            Skin="Office2007" OnInit="RadComboBox1_Init" CausesValidation="false" OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
                                                                            <ItemTemplate>
                                                                                <div id="div1">
                                                                                    <telerik:RadTreeView ID="RadTreeView1" Skin="Office2007" runat="server" OnClientNodeClicking="nodeClickingForCategory1">
                                                                                    </telerik:RadTreeView>
                                                                                </div>
                                                                            </ItemTemplate>
                                                                            <Items>
                                                                                <telerik:RadComboBoxItem Text="" Value="" />
                                                                            </Items>
                                                                        </telerik:RadComboBox>
                                                                        <asp:UpdateProgress ID="UpdateProgressCategory1" runat="server" AssociatedUpdatePanelID="UpdCat1"
                                                                            DisplayAfter="100" DynamicLayout="true">
                                                                            <ProgressTemplate>
                                                                                <img alt="Progress" border="0" src="Images/progress.gif" />
                                                                                <span>Validating ...</span>
                                                                            </ProgressTemplate>
                                                                        </asp:UpdateProgress>
                                                                        <asp:CustomValidator ID="CustomValCategory1" ValidationGroup="Category1Group" runat="server"
                                                                            ErrorMessage=""  ClientValidationFunction="validateCombo" Display="Dynamic"  ></asp:CustomValidator>
                                                                        <asp:Label ID="lblCustomErrorMessage" runat="server" ForeColor="Red" Text=""></asp:Label>
                                                                        <%--     &nbsp;<asp:RequiredFieldValidator ID="ReqCategory1" ControlToValidate="RadComboBox1"
                                                                            runat="server" InitialValue="0" ErrorMessage="select"></asp:RequiredFieldValidator>
                                                                        <br />--%>
                                                                        <asp:Label ID="lblCat1" runat="server" Visible="false" ForeColor="Red" Text="Please associate to child category"></asp:Label>
                                                                    </ContentTemplate>
                                                                    <Triggers>
                                                                        <asp:AsyncPostBackTrigger ControlID="RadComboBox1" EventName="SelectedIndexChanged" />
                                                                    </Triggers>
                                                                </asp:UpdatePanel>



The custom javascript is,


 function validateCombo(source, args)
  {
        var combo = $find("<%=RadComboBox1.ClientID%>");
        items = combo.get_items();
        if(combo.get_text()=="Category")
        {
            document.getElementById("<%=lblCustomErrorMessage.ClientID %>").innerHTML="You must select a category";
            document.getElementById("<%=CustomValCategory1.ClientID %>") .innerHTML='';
         }

        //if(combo.get_text() == items.getItem(0).get_text())
        if(document.getElementById("<%=hdnParentCategoryId.ClientID %>").value == 1)
        {
            args.IsValid = false;
        }
        else
        {
            args.IsValid = true;
        }
  }

Please Help me..
Any help will be Appreciated!!

Thanks and Regards!
chithuraj.j

[Princy]

Hi Chithuraj,

I am not sure if there is any client event which fires after the server side SelectionIndexChanged event of the RadComboBox. But a suggestion would be to use RegisterStartupScript method to call a clientside function from the code behind.

Hope this makes sense.. :)
Princy.