Master/Detail grid with StyleFormatCondition

Hello,
To achieve this goal, handle the GridView.RowStyle event for a master view. Here, you need to check the style condition at the data source level. For example:

C#
void gridView1_RowStyle(object sender, RowStyleEventArgs e)  
{  
    foreach (StyleFormatCondition style in gridView2.FormatConditions)  
    {  
        DataView view = ds.Tables[1].DefaultView;  
        int id = Convert.ToInt32(gridView1.GetRowCellValue(e.RowHandle, "ItemID"));  
        view.RowFilter = style.Expression + "AND [ItemID] = " + id.ToString();  
        if (view.Count > 0)  
            e.Appearance.BackColor = style.Appearance.BackColor;  
    }  
}  

Visual Basic
Private Sub gridView1_RowStyle(ByVal sender As Object, ByVal e As RowStyleEventArgs)  
    For Each style As StyleFormatCondition In gridView2.FormatConditions  
        Dim view As DataView = ds.Tables(1).DefaultView  
        Dim id As Integer = Convert.ToInt32(gridView1.GetRowCellValue(e.RowHandle, "ItemID"))  
        view.RowFilter = style.Expression & "AND [ItemID] = " & id.ToString()  
        If view.Count > 0 Then  
            e.Appearance.BackColor = style.Appearance.BackColor  
        End If  
    Next style  
End Sub  

In this sample the "ds" variable is of the DataSet type and the ds.Tables[1] table is a child table. Please see the attached project for more details.
Is this exactly what you are looking for? I hope to hear from you soon.