Hello Even Chen,

Please let me know if you need any further assistance with this matter.

Hello abhisinghal21,

Could you please modify my sample project attached in my previous response to this thread in order to make this issue reproducible?

This is going to be highly appreciated and would help me investigate this matter further.

Thank you for your cooperation on this matter.

Please let me know if you have any additional questions.

Hello abhisinghal21,

I wanted to let you know that we are currently investigating this matter and we will contact you tomorrow with our findings.

Thanks Vasya - Understood this point.

Next question:

I am manually creating bands and columns (autogenerate=false)

Hence, before assigning a new datasource, I intend to call as follows:

                oUltra.GridView.Band.Bands.Clear()
                oUltra.Rows.Clear()
                oUltra.GridView.Columns.Clear()
                oUltra.ClearTemplates()
                oUltra.GridView.ClearDataSource()

However, if I include the Band.Bands.Clear or oultra.bands.clear, a sys.argumentexception is thrown on client side javascript.

If I dont include the band.bands.clear call, the band.bands.count returns 1 even after cleardatasource.

Pl advise

Thanks

Abhishek

Hello abhisinghal21,

Thank you for getting back to me.

I investgated you requirement further and what I can suggest is  DataBinding grid after adding the relation. In this scenario the grid will be bound and rendered with the second data source with the newly added relation. For example:

 Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load

 If Not IsPostBack Then
　
 Me.WebHierarchicalDataGrid1.DataSource = TestClass.Dataset1
 Dim ds As New DataSet()

ds = WebHierarchicalDataGrid1.DataSource



Dim relation As New DataRelation("IDRelation", ds.Tables(0).Columns("ID"), ds.Tables(1).Columns("ID"))
ds.Relations.Add(relation)
　
　
 Me.WebHierarchicalDataGrid1.GridView.ClearDataSource()
 Me.WebHierarchicalDataGrid1.DataSource = ds
 Me.WebHierarchicalDataGrid1.GridView.DataBind()
　
 End If

I am attaching to modified sample for your reference.

Please let me know if you have any further questions regarding this matter