Manually add items into ItemTemplate

[Andy Green]

 

Hi All

I have a RadCombobox, and the very first item on the list is added in the code behind.

With ddlApptClinic

.Items.Clear()
.Items.Insert(0, New RadComboBoxItem("Any Clinic", -1))
.Items.Insert(0, New RadComboBoxItem("", 0))

I have now added a template item, and the above are missing. How do I add items when I have an item Template

<ItemTemplate>

 <%# DataBinder.Eval(Container.DataItem, "ClinicCode")%><br />
 <%# DataBinder.Eval(Container.DataItem, "ClinicDescription")%>

</ItemTemplate>

Andy

[Shinu]

Hi,

RadComboBox doesn't support adding item using ItemTemplate in aspx and just items programmatic at the same time. Please add items either from ASPX or through code behind.

Thanks,
Shinu.

[Andy Green]

I was using code behind to add the items as such

With ddlApptClinic

.Items.Clear()
.Items.Insert(0, New RadComboBoxItem("Any Clinic", -1))
.Items.Insert(0, New RadComboBoxItem("", 0))

But since adding an item template this no longer works.

I have since tried your suggestion by adding them in the ASPX and that still don't show.

<telerik:RadComboBox ID="ddlApptClinic" Runat="server" Width="300px" EnableEmbeddedSkins="false" Skin="Activity"  emptyMessage=" " AppendDataBoundItems="true"  OnDataBound="ddlApptClinic_DataBound">
    <HeaderTemplate>
        <asp:Literal runat="server" ID="ltlClinicCodeHeader" />
    </HeaderTemplate>
        <Items>
            <telerik:RadComboBoxItem runat="server" Text="Any Clinic" Value="-1" />
            <telerik:RadComboBoxItem runat="server" Text="" Value="0" />
        </Items>
        <ItemTemplate>
        <%# DataBinder.Eval(Container.DataItem, "ClinicCode")%><br />
        <span class="clinicStyle"><%# DataBinder.Eval(Container.DataItem, "ClinicDescription")%></span>
    </ItemTemplate>
</telerik:RadComboBox>

What an I doing wrong?

Andy

[Shinu]

Hi,

I tried your code, I couldn't see the RadCombobox when I set the EmptyMessage=" ". When i removed that property, It works fine for me.

Thanks,
Shinu.

[Andy Green]

Thanks Shinu

Still not quite right for me.

If I remove the empty message from above I have the following markup: I have also removed the blank item.

<telerik:RadComboBox ID="ddlApptClinic" Runat="server" Width="300px" EnableEmbeddedSkins="false" Skin="Activity"  emptyMessage=" " AppendDataBoundItems="true"  OnDataBound="ddlApptClinic_DataBound">

    <HeaderTemplate>

        <asp:Literal runat="server" ID="ltlClinicCodeHeader" />

    </HeaderTemplate>

        <Items>

            <telerik:RadComboBoxItem runat="server" Text="Any Clinic" Value="-1" />

        </Items>

        <ItemTemplate>

        <%# DataBinder.Eval(Container.DataItem, "ClinicCode")%><br />

        <span class="clinicStyle"><%# DataBinder.Eval(Container.DataItem, "ClinicDescription")%></span>

    </ItemTemplate>

</telerik:RadComboBox>

This is my server side code:

Protected Sub ClinicsBySpecialty(ByVal Specialty_ID As Int32)

    'Specialty
    Dim cl As New Activity_Outcomes
    Dim cl_ds As Data.DataTable = cl.ClinicsBySpecialty(Specialty_ID, User_GUID)
    With ddlApptClinic
        '.Items.Clear()
        '.Items.Insert(0, New RadComboBoxItem("Any Clinic", -1))
        '.Items.Insert(0, New RadComboBoxItem("", 0))
        .DataSource = cl_ds
        .DataTextField = "ClinicCode"
        .DataValueField = "ClinicId"
        .DataBind()
        .SelectedIndex = 0
    End With

End Sub

I now get the Any Clinic but not as an item in the list, it only shows in the text box when the control loads. If I make any selection it disappears.

Andy

[Nencho]

Hello Andy,

I would suggest you to call explicitly the DataBind() method, on the manually added item. Please consider the following implementation :

'Specialty
       Dim cl As New Activity_Outcomes
       Dim cl_ds As Data.DataTable = cl.ClinicsBySpecialty(Specialty_ID, User_GUID)
       With ddlApptClinic
           ddlApptClinic.Items.Clear()
           ddlApptClinic.DataSource = cl_ds
           ddlApptClinic.DataTextField = "ClinicCode"
           ddlApptClinic.DataValueField = "ClinicId"
           ddlApptClinic.DataBind()
           Dim item As RadComboBoxItem = New RadComboBoxItem("Any Clinic", "-1")
           ddlApptClinic.Items.Insert(0, item)
           item.DataBind()
           ddlApptClinic.SelectedIndex = 0
       End With

All the best,
Nencho
the Telerik team

[Andy Green]

Thanks Nencho

But this too adds it to the text box, but not to the list, therefor If I select a clinic I no longer get the option to select Any.

I think for now I'm going to do this in the database, so its in the data that gets bound.

Andy

[Nencho]

Hello Andy,

I am not quite sure that I had understood the issue you are currently facing. Would you elaborate a bit more on the matter? In addition, here is a video demonstrating the behavior at my end with the previously provided implementation.


Kind regards,
Nencho
the Telerik team

[Andy Green]

Thanks Nencho

The video show exactly what I'm after, but M my implementation does do that. The Any Clinic appears in the text box, but is lost on any selection.

I will revisit and check again

Thanks again Andy

[Nencho]

Hello Andy,

Please take your time investigating the issue further and let us know once you have any results. If the issue still persist, I would suggest you to open a support ticket, along with a runnable sample attached demonstrating the problem, so we could inspect it locally.

Kind regards,
Nencho
the Telerik team

[Sujath]

See this link

 http://stackoverflow.com/questions/1949424/conditional-item-templates-with-radcombobox 

Go through this Documentation Page 

http://docs.telerik.com/devtools/aspnet-ajax/controls/combobox/how-to/insert-a-default-item-when-databinding-radcombobox

[Sujath]

hello andy green,,

See this link http://stackoverflow.com/questions/1949424/conditional-item-templates-with-radcombobox Go through this Documentation Page http://docs.telerik.com/devtools/aspnet-ajax/controls/combobox/how-to/insert-a-default-item-when-databinding-radcombobox