Grid Edit Usercontrol RadComboBox SelectedIndexChanged not firing

[Steve Todd]

Hi Guys

To improve performance and allow a more flexibility I have developed a simple user control to handle the editing of a rad grid row. On the usercontrol there are 2 RadComboBoxes (Job and Task) which both have the AutoPostBack property set to True. The idea is when you select a Job the Task combo box only populates Tasks relevant to that Job. 

I have a major problem in that after selecting a Job from the dropdownlist (populated correctly via the ItemsRequested method) the Job_SelectedIndexChanged event isn't fired, however the Task_ItemsRequested is fired but I cannot populate this correctly because I cannot get access to the value of the selected item in the Job dropdownbox. In the debugger I've tried a number of ways to get the SelectedValue e.g. FindControl("Job").SelectedValue, Ctype(.. RadComboBox..) but I only get back a blank string.

When this functionality was part of the RadGrid it seemed to work fine, however now I've moved it into a UserControl it's seems to be faultering.

Any Ideas

Steve   

[Princy]

Hello Steve,

I tried out the same senario at my end and it worked as expected. Below given is the code i tried, check out for differences with your code:
ascx:

<telerik:RadComboBox ID="RadComboBox1" DataSourceID="SqlDataSource1" DataValueField="Job" AutoPostBack="true" DataTextField="Job" runat="server" OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
</telerik:RadComboBox>

<telerik:RadComboBox ID="RadComboBox2" runat="server">
</telerik:RadComboBox>

ascx.cs:

protected void RadComboBox1_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
    {
        RadComboBox combobox1 = (RadComboBox)o;
        string strtxt = combobox1.SelectedItem.Text;
        string value = combobox1.SelectedValue.ToString();
        if(value == "Engineer")
        {
            RadComboBox2.DataSourceID = "SqlDataSource1";
            RadComboBox2.DataTextField = "Task1";
        }
        else if(value == "Teacher")
        {
            RadComboBox2.DataSourceID = "SqlDataSource1";
            RadComboBox2.DataTextField = "Task2";
        }
    }

Thanks

Princy.

[Steve Todd]

Hi Princy

Thanks for the reply. The code looks the same. Some further info - the grid on the page calling the usercontrol is Ajaxified if that makes a difference, also I have noticed that the SelectedIndexChanged does fire but only after clicking the Cancel button on my UserControl (see below). 

RadComboBox definition

<telerik:RadComboBox runat="server" CausesValidation="true"  

                        Height="140px"

                        HighlightTemplatedItems="true"

                        EnableLoadOnDemand="True"

                        DataTextField="Description" 

                        DataValueField="No" 

                        ID="rcboJobNo"

                        AutoPostBack="true" 

                        Width="450px"

                        OnSelectedIndexChanged="rcboJobNo_SelectedIndexChanged"

                        >

VB Code Behind

 Protected Sub rcboJobNo_SelectedIndexChanged(ByVal o As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)

        Dim rcboTask As RadComboBox = CType(FindControl("rcboTaskNo"), RadComboBox)

Cancel Button    

<asp:Button ID="btnCancel" Text="Cancel" runat="server" CommandName="Cancel" SkinID="BtnSmlCancel" CausesValidation="False"/>

Steve

[Steve Todd]

Through a lot of debugging, I've managed to solve my problem - though I'm not too sure how. I wasdynamically adding in radinput manager target controls on ItemCreated. When I commented these lines of code out the drop downs worked fine. Something odd going on but it's solved now.

Steve