Okay, I've got a little further with this now (thanks to trial and error, not thanks to any kind of Infragistics "support")

The WHDG will only happily use the bands you supply it if their layout and setup if perfect. This is why it's not displaying anything if you set it's AutoGenerateBands / Columns to "False"

The thing that caught me out with the bands was that they are hierarchical in nature. So say you have a grid with 3 levels:

Level 0 you do not make a band for, you set this up as the Columns of the grid itself

Level 1 you create a band for

Level 2 you create a band and insert it into the band collection of Level 1, not into the collection of bands for the WHDG itself.

A good way to troubleshoot the band setup is to set the grid to auto gen your bands and remove any code you have to make bands yourself. The handle a grid event, such as "OnUnload" and stop the debugger there. Have a look at the Bands collection it's autogenerated and make sure your manual band creation code matches this. I made a recusive function to do this:

(ignore code sketchyness plz)

Private Function populateBand(ByRef parentBand As Infragistics.Web.UI.GridControls.Band, ByVal i As Integer)

        If i < Me.UltraWebGrid1.DataSource.Tables.Count Then

            Dim band As New Infragistics.Web.UI.GridControls.Band

            Dim table As New DataTable

            table = Me.UltraWebGrid1.DataSource.Tables(i)

            band.DataMember = table.TableName

            band.Key = table.TableName

            band.DataKeyFields = "name"

            band.ShowHeader = False

            band.AutoGenerateColumns = False

            ' check if this is a band

            Try

                Dim str1 As String = table.Rows(0).Item(table.Columns.IndexOf("bandkey"))

                Dim str2 As String = "x"

                If Not String.Compare(str1, str2) = 0 Then

                    addDataField("Sel", "Sel", "20", False, "columnClassSel", table, band)

                    addDataField("Sel1", "Sel", "20", False, "columnClassSel", table, band)

                    addDataField("Sel2", "Sel", "20", False, "columnClassSel", table, band)

                    addDataField("Sel3", "Sel", "20", False, "columnClassSel", table, band)

                    addDataField("Sel4", "Sel", "20", False, "columnClassSel", table, band)

                    addDataField("Sel5", "Sel", "20", False, "columnClassSel", table, band)

                    addDataField("Sel6", "Sel", "20", False, "columnClassSel", table, band)

                End If

            Catch ex As Exception

            End Try

            addDataField("display", "display", "", False, "", table, band)

            addDataField("Available", "Available", "70", False, "columnClassAvailable", table, band)

            addDataField("name", "name", "", True, "", table, band)

            addDataField("parenttable", "parenttable", "", True, "", table, band)

            addDataField("parentkey", "parentkey", "", True, "", table, band)

            addDataField("childtable", "childtable", "", True, "", table, band)

            addDataField("level", "level", "", True, "", table, band)

            addDataField("filter", "filter", "", True, "", table, band)

            addDataField("incex", "incex", "", True, "", table, band)

            addDataField("tbl", "tbl", "", True, "", table, band)

            addDataField("bandkey", "bandkey", "", True, "", table, band)

            parentBand.Bands.Add(band)

            i = i + 1

            ' Revusivly add bands into this band 

            populateBand(band, i)

        End If

    End Function

Hello,

I'm looking into this scenario.

I will update you soon.

Thanks.

I think a lot of the trouble with mapping the WHDG control would go away if there was a decent level of reporting coming back from the grid component on what it's unhappy about. It's very rare to get any kind of error from the grid, it just silently fails or ignores bands, etc. 

If we could catch a .Error event or switch the grid into debug mode, so it complains about everything that isn't right (bands not being used, incorrect dataKeyFields, etc) then things would be a lot easier to setup in these more complex scenarios.

I thought it might be helpful if I sent my example.  This does not work for me, but is similar to the VB example above.  I wanted to have more control over the formatting of my columns before loading, so I moved my webhierarchicaldatasource to the code behind.  I used the VB example as a model, but mine is C#.  The grid does display with both the parent and details; however, it seems to ignore everything in my FOR loop where I am defining the datafields.  You can see in my attached example that on the parent, I set the header text to "Test" and I also changed a couple of column widths just before binding.  Neither works as expected.  Any ideas?

 Hello guys,

If I understand well your issue is that you are not able to style the child band when Mnaual Load on demand is used. The code below shows how can be implemented completely independently  Manula Load On Demand and in the same time you are able to style the child band. Actually you have access to the columns even though they are generated on fly :

The gird aspx definition is as follows:

 <ig:WebHierarchicalDataGrid ID="whdg1" runat="server" AutoGenerateColumns="false"
            AutoGenerateBands="false" InitialExpandDepth="0" InitialDataBindDepth="0" Height="450px"
            Width="862px" DataKeyFields="ID" OnRowIslandsPopulating="whdg1_RowIslandsPopulating"
            OnInitializeRow="whdg1_InitializeRow">
            <ExpandCollapseAnimation SlideOpenDirection="Auto" 
            SlideOpenDuration="300" SlideCloseDirection="Auto"
                SlideCloseDuration="300" />
            <Columns>
                <ig:BoundDataField DataFieldName="ID" Key="ID" Header-Text="ID" />
                <ig:BoundDataField DataFieldName="Fname" Key="Fname"
                 Header-Text="Firs Name" Width="230px" />
                <ig:BoundDataField DataFieldName="Sname" Key="Sname" 
                Header-Text="Second Name" Width="150px" />
            </Columns>
        </ig:WebHierarchicalDataGrid>

Implementation in code - behind is :

public partial class _Default : System.Web.UI.Page
{
 
    #region Page
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        this.whdg1.DataSource = GetPersons();
    }
    protected void Page_Load(object sender, EventArgs e)
    {
 
    }
    
    #endregion
 
    #region Grid Events
 
    protected void whdg1_InitializeRow(object sender, RowEventArgs e)
    {
        if(isChild == false)  
                 ((ContainerGridRecord)e.Row).IsEmptyParent = true;
      
    }
 
    protected void whdg1_RowIslandsPopulating(object sender, Infragistics.Web.UI.GridControls.ContainerRowCancelEventArgs e)
    {
        e.Cancel = true;
        ContainerGrid child = new ContainerGrid();
        child.InitializeRow += new InitializeRowEventHandler(child_InitializeRow);
        
        e.Row.RowIslands.Add(child);
 
        child.DataSource = GetAddresses();
        child.DataBind();
    }
   
    #endregion
 
    #region Child grid events
   
    
    bool isChild = false;
    void child_InitializeRow(object sender, RowEventArgs e)
    {
        e.Row.Items[0].Column.Header.Text = "This is the changed Add";
        isChild = true;
    }
    #endregion
 
    #region Entities
 
    public class Person
    {
        public int _addressID;
        public int ID { get; set; }
        public string Fname { get; set; }
        public string Sname { get; set; }
        public int Addresses
        {
            get { return _addressID; }
        }
    }
    public class Address
    {
        public int ID { get; set; }
        public string Street { get; set; }
        public string City { get; set; }
    } 
    #endregion
 
    #region Data
   
    private List<Person> GetPersons()
    {
        List<Person> list = new List<Person>();
        list.Add(
            new Person() { ID = 1, Fname = "Rado", Sname = "Minchev",_addressID=1 });
        list.Add(
           new Person() { ID = 2, Fname = "Vlado", Sname = "Zagorski", _addressID = 1 });
        list.Add(
           new Person() { ID = 3, Fname = "Alex", Sname = "Fidanov", _addressID = 1 });
        list.Add(
           new Person() { ID = 4, Fname = "Ivan", Sname = "Simeonov", _addressID = 2 });
        list.Add(
           new Person() { ID = 5, Fname = "Anton", Sname = "Staikov", _addressID = 2 });
        list.Add(
                   new Person() { ID = 6, Fname = "Dimi", Sname = "Gineva", _addressID = 2 });
        list.Add(
                   new Person() { ID = 7, Fname = "Danko", Sname = "Valkov", _addressID = 2 });
        list.Add(
                   new Person() { ID = 8, Fname = "Cveti", Sname = "Georgieva", _addressID = 2 });
        return list;
    }
    private List<Address> GetAddresses()
    {
        List<Address> list = new List<Address>();
        list.Add(
             new Address() { ID = 1, City = "Windsor",

     Street = "Corporate Park 50 Millstone Road" });
        list.Add(
             new Address() { ID = 2, City = "Sofia", Street = "110 B, Simeonovsko Shosse  Office Floor II" });
        return list;
    }     #endregion
}

Hope this helps.

Hello,

How would you create the following columns through the code-behind class?

        <ig:BoundDataField DataFieldName="ID" Key="ID" Header-Text="ID" />
                <ig:BoundDataField DataFieldName="Fname" Key="Fname" Header-Text="First Name" Width="230px" />
                <ig:BoundDataField DataFieldName="Sname" Key="Sname" Header-Text="Second Name" Width="150px" />

I've tried to add the following to your sample:

private void AddBandColumn(IBand band, string dataField, string caption, bool hidden) //, AllowUpdate updatable)
    {
      BoundDataField column = new BoundDataField(true);
      column.DataFieldName = dataField;
      column.Key = dataField;
      column.Hidden = hidden;
      column.Header.Text = caption;
      band.Columns.Add(column);
    }

    private void CreateColumns()
    {
        this.whdg1.Bands.Clear();
        this.whdg1.Columns.Clear();

        this.whdg1.DataKeyFields = "ID";

        AddBandColumn(this.whdg1, "ID", "ID", false);
        AddBandColumn(this.whdg1, "Fname", "First Name", false);
        AddBandColumn(this.whdg1, "Sname", "Second Name", false);

          //Second Level - Child
        Band band = new Band();
        AddBandColumn(band, "ID", "ID", false);
        AddBandColumn(band, "City", "City", false);
        AddBandColumn(band, "Street", "Street", false);
        this.whdg1.GridView.Bands.Add(band);
    }

I even tried adding the parent columns to  this.whdg1.GridView.Columns,  but did not work.

Thanks