I'm evaluating the Grid control for .NET.  I'm filling in the data manually.  My requirement is to display is to display a 2 level hiarchy with a conditional third.  I understand that a detail grid can be used.  The 2nd level down can sometimes have a third level but I don't want to display that level (3rd) for a particular detail row (2nd level) if that row doesn't have any detail data (for this conditional 3rd level) not even headers for that 3rd level

 A
    A1
    A2 
        A2.1   
    A3
    A4

B
    B1
        B1.1
        B1.2
    B2
    B3
        B3.1

Also, a question on the WPF grid.  Are the concepts for the WPF grid the same as the .NET Grid with detail grids for creating levels?

Thank

Bernie

You can set the Visibility to false on the Detail grid and the ShowPlusMinus to Never on the Parent DataRow.

Here is a code example:

private void Form1_Load( object sender, EventArgs e )
{
  grid.BeginInit();           

  grid.Columns.Add( new Column( "FirstName", typeof( string ) ) );
  grid.Columns.Add( new Column( "LastName", typeof( string ) ) );
  grid.Columns.Add( new Column( "FamilyID", typeof( int ) ) );
  grid.Columns.Add( new Column( "Occupation", typeof( string ) ) );

  Xceed.Grid.DataRow row1 = grid.DataRows.AddNew();
  row1.Cells[ "FirstName" ].Value = "Peter";
  row1.Cells[ "LastName" ].Value = "Griffin";
  row1.Cells[ "FamilyID" ].Value = 1;
  row1.Cells[ "Occupation" ].Value = "Fisherman";
  row1.EndEdit();

  Xceed.Grid.DataRow row2 = grid.DataRows.AddNew();
  row2.Cells[ "FirstName" ].Value = "Homer";
  row2.Cells[ "LastName" ].Value = "Simpson";
  row2.Cells[ "FamilyID" ].Value = 2;
  row2.Cells[ "Occupation" ].Value = "Nuclear Technician";
  row2.EndEdit();

  DetailGrid detail = new DetailGrid();

  detail.HeaderRows.Add( new ColumnManagerRow() );

  detail.Columns.Add( new Column( "FirstName", typeof( string ) ) );
  detail.Columns.Add( new Column( "Relationship", typeof( string ) ) );
  detail.Columns.Add( new Column( "FamilyID", typeof( int ) ) );

  grid.DetailGridTemplates.Add( detail );
  grid.InitializingDetailGrid += new InitializingDetailGridEventHandler( this.init_details );

  grid.EndInit();

  DetailGrid childDetail = new DetailGrid();

  childDetail.HeaderRows.Add( new ColumnManagerRow() );
  childDetail.Columns.Add( new Column( "Episode", typeof( string ) ) );
  childDetail.Columns.Add( new Column( "Date Aired", typeof( DateTime ) ) );

  detail.DetailGridTemplates.Add( childDetail );
  detail.InitializingDetailGrid += new InitializingDetailGridEventHandler( detail_InitializingDetailGrid );
  grid.UpdateDetailGrids();

}

void detail_InitializingDetailGrid( object sender, InitializingDetailGridEventArgs e )
{
  string value = e.Grid.ParentDataRow.Cells[ "FirstName" ].Value.ToString();
  if( value == "Meg" || value =="Lisa" )
  {
    e.Grid.Visible = false;
    e.Grid.ParentDataRow.ShowPlusMinus = ShowPlusMinus.Never;
  }
  else
  {
    Xceed.Grid.DataRow row1 = e.Grid.DataRows.AddNew();
    row1.Cells[ "Episode" ].Value = "Episode 1";
    row1.Cells[ "Date Aired" ].Value = new DateTime( 2003, 12, 15 );
    row1.EndEdit();
  }
}

private void init_details( object sender, InitializingDetailGridEventArgs e )
{
  switch( ( int )e.Grid.ParentDataRow.Cells[ "FamilyID" ].Value )
  {
    case 1:
      {
        Xceed.Grid.DataRow row1 = e.Grid.DataRows.AddNew();
        row1.Cells[ "FirstName" ].Value = "Lois";
        row1.Cells[ "Relationship" ].Value = "Wife";
        row1.Cells[ "FamilyID" ].Value = 1;
        row1.EndEdit();

        Xceed.Grid.DataRow row2 = e.Grid.DataRows.AddNew();
        row2.Cells[ "FirstName" ].Value = "Meg";
        row2.Cells[ "Relationship" ].Value = "Daughter";
        row2.Cells[ "FamilyID" ].Value = 1;
        row2.EndEdit();

        Xceed.Grid.DataRow row3 = e.Grid.DataRows.AddNew();
        row3.Cells[ "FirstName" ].Value = "Chris";
        row3.Cells[ "Relationship" ].Value = "Son";
        row3.Cells[ "FamilyID" ].Value = 1;
        row3.EndEdit();

        Xceed.Grid.DataRow row4 = e.Grid.DataRows.AddNew();
        row4.Cells[ "FirstName" ].Value = "Stewie";
        row4.Cells[ "Relationship" ].Value = "Son";
        row4.Cells[ "FamilyID" ].Value = 1;
        row4.EndEdit();

        Xceed.Grid.DataRow row5 = e.Grid.DataRows.AddNew();
        row5.Cells[ "FirstName" ].Value = "Brian";
        row5.Cells[ "Relationship" ].Value = "Dog";
        row5.Cells[ "FamilyID" ].Value = 1;
        row5.EndEdit();

        break;
      }
    case 2:
      {
        Xceed.Grid.DataRow row1 = e.Grid.DataRows.AddNew();
        row1.Cells[ "FirstName" ].Value = "Marge";
        row1.Cells[ "Relationship" ].Value = "Wife";
        row1.Cells[ "FamilyID" ].Value = 2;
        row1.EndEdit();

        Xceed.Grid.DataRow row2 = e.Grid.DataRows.AddNew();
        row2.Cells[ "FirstName" ].Value = "Bart";
        row2.Cells[ "Relationship" ].Value = "Son";
        row2.Cells[ "FamilyID" ].Value = 2;
        row2.EndEdit();

        Xceed.Grid.DataRow row3 = e.Grid.DataRows.AddNew();
        row3.Cells[ "FirstName" ].Value = "Lisa";
        row3.Cells[ "Relationship" ].Value = "Daughter";
        row3.Cells[ "FamilyID" ].Value = 2;
        row3.EndEdit();

        Xceed.Grid.DataRow row4 = e.Grid.DataRows.AddNew();
        row4.Cells[ "FirstName" ].Value = "Maggie";
        row4.Cells[ "Relationship" ].Value = "Daughter";
        row4.Cells[ "FamilyID" ].Value = 2;
        row4.EndEdit();

        break;
      }
  }
}