'Returns All dimensions in parent/child format including Member Properties
'Fields include Parent, Child, Child Description, RowId, Generation Number, Text1-Text8
Dim sScenarioType As String = args.NameValuePairs.XFGetValue("ScenarioType", String.Empty)
Dim Time As String = args.NameValuePairs.XFGetValue("Time", String.Empty)
Dim ScenarioTypeId As Integer = ScenarioType.GetItem(sScenarioType).Id
Dim TimeId As Integer = BRApi.Finance.Members.GetMemberId(si,dimtypeId.Time,Time)
Dim FileName As String = args.NameValuePairs.XFGetValue("FileName", String.Empty)
Here is how you can copy the code. as an e,g I copied the code. There is server task where you can add BR
Seems like you need to call BR from combo box. Once they select entity it updates your chart.