Adding child rows to a hierarchical grid.

[Ian]

I'm following the example from   https://www.telerik.com/forums/object-bound-hierarchy#711007, which describes how to create an object-based hierarchy. An excellent example.

I'm now trying to modify that example to look how I want, and I've done everything apart from the critical bit - adding the row of 'child' data.

For a normal row, I would do:

 Dim gvdi As New GridViewDataRowInfo(myGrid.MasterView)
        With gvdi
            .Cells("name").Value = t.name
            .Cells("status").Value = t.status
            .Tag = t '...plus any other columns I need

        End With

The example uses the simpler constructor for a new child row, like:

                childTemplate.Rows.Add(t.id, tt.name, tt.status) '....where 't' is my object.

This also works fine

But now I'd like to use the first style of constructor for the child row, and I can't work out how to do it.

When I use the first bit of code, the runtime complains that it's not a GridViewHierarchyRowInfo, so I changed it to be:

 Dim gvdi As New GridViewHierarchyRowInfo(myGrid.MasterView)
               'With gvdi
                   .Cells("name").Value = tt.name
                   .Cells("status").Value = tt.status
                   .Tag = tt
               End With

...and that doesn't work either. Is it the GridViewHierarchyRowInfo(myGrid.MasterView) which is wrong?

Any ideas?

Thanks

[Maria]

Hi Ian,

Thank you for the code snippets.

First, I want to point out that the example you are looking at is quite old. According to the code snippets you have sent I assume that you are using the RadGridView control in unbound mode. I am sending you a link to our documentation where you can check the Hierarchical Grid in the Unbound Mode section and more specifically the LoadUnboundData method where you can see how to add child rows to the hierarchical grid.

Here is the link to our documentation: 

https://docs.telerik.com/devtools/winforms/controls/gridview/hierarchical-grid/binding-to-hierarchical-data-programmatically

You have two options whether the RadGridView is in unbound or bound mode. In the link to our documentation, you can find also information about the RadGridView in bound mode and choose which approach is more useful for your implementation.

I hope this information is useful for you.

Give it a try and don't hesitate to write again if you have more questions.

Regards,
Maria
Progress Telerik

[Ian]

Thanks - but I get a 404 error with the above link.

[Maria]

Hi Ian,

I am sorry for the inconvenience, we are working on this problem. You can try to open the link another way. You can copy it and put it in the search engine you use. That's how it should work for now until we fixed the hyperlinks. 

Regards,
Maria
Progress Telerik

[Ian]

A much better example -thanks....

...but it also uses the

childTemplate.Rows.Add(t.id, tt.name, tt.status) ...

..style of adding rows, rather than...

Dim gvdi As New GridViewHierarchyRowInfo(myGrid.MasterView)
               With gvdi
                   .Cells("name").Value = tt.name
                   .Cells("status").Value = tt.status
                   .Tag = tt

...(etc)
               End With

...which is what I need.

[Dess | Tech Support Engineer, Principal]

Hi, Ian,

The GridViewTemplate.Rows.AddNew method adds a new row to the grid template. Then, you can add values to the respective cells:

 Dim r As GridViewRowInfo = childTemplate.Rows.AddNew()
 r.Cells("ColumnName").Value = "value"

I hope this helps.

[Ian]

Ah - that seems to work. Thanks!