Populate dropDownList in radGrid

[DGraham]

Hi,

 

How can I populate a ‘dropDownList’ inside a radGrid from the code behind?

 

The custom form template is as follows:

<FormTemplate>
              <asp:Label ID = "lblContact" runat ="server" text = "Contact"></asp:Label>
              <asp:DropDownList ID="ddlContacts" runat ="server" DataValueField ="Description" DataTextField ="description"/> <br/><br />
              <asp:Button ID="btnSubmit" runat ="server" Text ="Submit" />
              <asp:Button ID="btnCancel" runat ="server" Text ="Cancel" />
</FormTemplate>

In the code behind I have the following:

 

 

Private   Sub RadGridService_NeedDataSource(ByVal source As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles RadGridServices.NeedDataSource                       Dim objContacts As Array

'Gets data from web service

objContacts = objReceptionBureauService.getAllContactsForEmployee("EmployeeID")

Dim contacts As DropDownList = TryCast(FindControl("ddlContacts"), DropDownList)

contacts.DataSource = objContacts

contacts.DataBind()

contacts.DataTextField = "Description"

contacts.DataValueField = "Description"  End Sub

[Shinu]

Hello,

Try the following code snippet in order to populate the DropDownList which is placed in FormTemplate.

VB:

Protected Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As GridItemEventArgs)
    If TypeOf e.Item Is GridEditFormItem AndAlso e.Item.IsInEditMode Then
        Dim item As GridEditFormItem = DirectCast(e.Item, GridEditFormItem)
        Dim dropdown As DropDownList = DirectCast(item.FindControl("ddlContacts"), DropDownList)
        'Populate the dropdownlist
    End If
End Sub

Thanks,
Shinu.

[DGraham]

Hi Shinu,

Thanks for your help, that's solved my problem...

[Edgar]

Hi, I am using this approach but when I use ItemCommand "Update" the dropdown is empty and I can't find the edited selected value.

[Eyup]

Hi Edgar,

You can use the the Bind or Eval expression to achieve this requirement:

https://msdn.microsoft.com/en-us/library/vstudio/ms178366%28v=vs.100%29.aspx

In combination with the SelectedValue property, similar to this live sample:
​http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/form-template-update/defaultcs.aspx

And use the ExtractValues approach:
http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/manual-crud-operations/defaultcs.aspx

Alternatively, you can access the value manually using FindControl method to get the combo in edit mode:
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/rows/accessing-cells-and-rows#accessing-controls-in-editinsert-mode

Hope this helps.

Regards,
Eyup
Telerik