Adding bound objects in child view in Hierarchy GridView

[Steve]

I have the following RowSourceNeeded handler :

void gvEmployes_RowSourceNeeded(object sender, GridViewRowSourceNeededEventArgs e)
{
    if (e.Template == gvtEmployeLogiciels)
    {
        using ( var repo = new EmployesRepository())
        {
            foreach (LogicielDTO l in repo.GetLogicielsOfEmploye((EmployeDTO)e.ParentRow.DataBoundItem))
            {
                GridViewRowInfo gridRow = e.Template.Rows.NewRow();
                gridRow.Cells["nom"].Value = l.nom;
                gridRow.Cells["nbLicense"].Value = l.nbLicense;
                e.SourceCollection.Add(gridRow);
            }
        }
    }
}

However, I want the objects to be bound instead of just filling in cells so that something like this would work :

void gvEmployes_UserDeletingRow(object sender, GridViewRowCancelEventArgs e)

{

    foreach (var row in e.Rows)

    {

        switch (row.DataBoundItem.GetType().Name) // This will error if you are deleting a LogicielDTO row.


        {

            case "EmployeDTO":

                MessageBox.Show("Deleteing " + ((EmployeDTO)row.DataBoundItem).nom);

                break;

            case "LogicielDTO":

                MessageBox.Show("Deleteing " + ((LogicielDTO)row.DataBoundItem).nom);

                break;

        }

    }

}

How can I acheive this?

[Julian Benkov]

Hello Caroline,

Thank you for writing.

When the RadGridView is used in this hierarchy mode the DataBoundItem for the inner level row will be always initialized to null and can not be used. This behavior is by design. In this case you can use the Tag property to hold and use some related information. Here is a code snippet using this approach:

void gvEmployes_RowSourceNeeded(object sender, GridViewRowSourceNeededEventArgs e)
{
    if (e.Template == gvtEmployeLogiciels)
    {
        using ( var repo = new EmployesRepository())
        {
            foreach (LogicielDTO l in repo.GetLogicielsOfEmploye((EmployeDTO)e.ParentRow.DataBoundItem))
            {
                GridViewRowInfo gridRow = e.Template.Rows.NewRow();
                gridRow.Cells["nom"].Value = l.nom;
                gridRow.Cells["nbLicense"].Value = l.nbLicense;
                gridRow.Tag = l;
                e.SourceCollection.Add(gridRow);
            }
        }
    }
}

void gvEmployes_UserDeletingRow(object sender, GridViewRowCancelEventArgs e)
{
    foreach (var row in e.Rows)
    {
        if(row.DataBoundItem == null)
        {
            LogicielDTO l = row.Tag as LogicielDTO;
            if(l != null)
            {
                //your logic here...
            }
            return;
        }

        switch (row.DataBoundItem.GetType().Name) // This will error if you are deleting a LogicielDTO row.
        {
            case "EmployeDTO":
                MessageBox.Show("Deleteing " + ((EmployeDTO)row.DataBoundItem).nom);
                break;
            case "LogicielDTO":
                MessageBox.Show("Deleteing " + ((LogicielDTO)row.DataBoundItem).nom);
                break;
        }
    }
}

I hope this helps. 

All the best,
Julian Benkov
the Telerik team