Unfortunately it is not straightforward to extract the entire configuration, as it's constructed in code with quite a few different options.  We have a workaround now and are not dependant on this bug being fixed. 

The problem seems to occur when the grid attempts to restore expanded/collapsed grouped rows from a very large dataset with the grid configured to use 'VirtualLoad'.  Changing the grid to use 'Paged' mode (where large data sets are broken down into pages of data) resolves the issue. 

I have the same problem.  When its DataSource is a DataView, a WebCombo takes all the rows from the underlying DataTable without applying the RowFilter property.  However, it does apply the Sort property.

Handy, your sample isn't the same, as it performs a new database Select to get a new dataset. In my case, I want to avoid accessing the database again, and so I create a DataView on an existing DataTable.

The attached example shows the problem.  The first combo correctly contains all three rows of the DataTable. The second combo "WebComboDV" has a DataView as its DataSource with a RowFilter that filters out all but one row.  However, the combo is populated with all three rows, ignoring the DataView's RowFilter property - but it does sort the rows according to the Sort property.

The following is code behind for the Programmatic WebCombo sample.

public partial class cs_WebCombo_Programmatic_worked_DataView : System.Web.UI.Page
{
    DataTable dt;
       
    protected void Page_Load(object sender, EventArgs e)
    {
        WebCombo combo = new WebCombo("WebCombo1");
        combo.Width = Unit.Pixel(200);
        combo.Height = Unit.Pixel(20);
        combo.UseDefaultStyle = true;
        combo.DataTextField = "ColA";
        combo.DataValueField = "Id";

        WebCombo comboDV = new WebCombo("WebComboDV");
        comboDV.Width = Unit.Pixel(200);
        comboDV.Height = Unit.Pixel(20);
        comboDV.UseDefaultStyle = true;
        comboDV.DataTextField = "ColA";
        comboDV.DataValueField = "Id";

        // Setup Events
        combo.InitializeDataSource += new DataSourceEventHandler(combo_InitializeDataSource);
        comboDV.InitializeDataSource += new DataSourceEventHandler(combo_InitializeDataSourceDV);

        //this.Controls.Add(combo);
        this.DivContainer.Controls.Add(combo);
        this.DivContainer.Controls.Add(comboDV);

        dt = new DataTable();
        dt.Columns.Add("Id");
        dt.Columns.Add("ColA");
        dt.Columns.Add("ColB");
        dt.Columns.Add("ColC");

        dt.Rows.Add(new object[] { 1, "cell1A", "cell1B", "cell1C" });
        dt.Rows.Add(new object[] { 2, "cell2A", "cell2B", "cell2C" });
        dt.Rows.Add(new object[] { 3, "cell3A", "cell3B", "cell3C" });
        dt.AcceptChanges();
    }

    protected void combo_InitializeDataSource(object sender, DataSourceEventArgs e)
    {
        e.DataSource = dt;
    }

    protected void combo_InitializeDataSourceDV(object sender, DataSourceEventArgs e)
    {
        DataView dv = new DataView(dt, "ColA='cell2A'", "ColB DESC", DataViewRowState.CurrentRows);
        e.DataSource = dv;
    }
}

Hi Martin

Thanks for your confirmation that custom aggregate is not available in group headers. 

I do have a workaround.  Picking up each group header in an InitializeRow event handler, traversing its child rows to accumulate the aggregate result, and constructing the text using the result, I can then place the formatted text in the row's Cells[0].GroupInfoText. 

Regards

Robert

Thanks, Martin

It does work if I assign just the text to each cell, but that's doesn't get me any further than the original call on SetItemData to assign all texts at once.  My problem is that I need to set properties on individual cells as well as their text.  I have a workaround now, which is to assign the texts first (which presumably creates the cells), and then select individual cells by index -

Regards

Robert 

Thanks for your explanation, Riendy.  This is in some code that I have inherited using the Name property of SelectedRow, but I'm sure I can manage without it and use just Text and Value.