By default, the control displays a single level. Use the LevelCount property to specify the number of levels being displayed in the chart's header. Use the Level property to access the level in the chart area. Use the HeaderVisible property to hide the control's header bar. The control's header bar displays the levels in the chart area too. Use the Caption property to specify the column's caption being displayed in the control's header bar. Use the BackColorLevelHeader property to specify the background color of the chart's header. Use the ForeColorLevelHeader property to specify the foreground color of the chart's header. If the control displays the header bar using multiple levels the HeaderHeight property gets the height in pixels of a single level in the header bar. Use the LevelKey property to specify the key of the column.

The first level displays the month, the year and the number of the week in the year , the second level displays the name of the week day, and the third level displays the day of the month. The LevelCount property specifies the number of levels being displayed, in our case 3. 

The following Template shows how to display your header using three levels as arranged in the picture above ( just copy and paste the following script to Template page ):

BeginUpdate()
Chart
{
	LevelCount = 3
	Level(0)
	{
		Label = "<b><%mmm%>, <%yyyy%></b> <r>Week: <%ww%>"
		Unit = 256	'exWeek
	}
	Level(1).Label = "<%d1%>"
	Level(2).Label = "<%d%>"
}
EndUpdate()

The following VB sample displays your header using 3 levels as shown above:

With G2antt1
    .BeginUpdate
    With .Chart
        .LevelCount = 3
        With .Level(0)
            .Label = "<b><%mmm%>, <%yyyy%></b> <r>Week: <%ww%>"
            .Unit = EXG2ANTTLibCtl.UnitEnum.exWeek
        End With
        .Level(1).Label = "<%d1%>"
        .Level(2).Label = "<%d%>"
    End With
    .EndUpdate
End With

 The following VFP sample displays your header using 3 levels:

with thisform.g2antt1
.BeginUpdate()
with .Chart
	.LevelCount = 3
	with .Level(0)
		.Label = "<b><%mmm%>, <%yyyy%></b> <r>Week: <%ww%>"
		.Unit = 256
	endwith
	.Level(1).Label = "<%d1%>"
	.Level(2).Label = "<%d%>"
endwith
.EndUpdate()	
endwith

 The following VB.NET sample displays your header using 3 levels:

With AxG2antt1
    .BeginUpdate()
    With .Chart
        .LevelCount = 3
        With .Level(0)
            .Label = "<b><%mmm%>, <%yyyy%></b> <r>Week: <%ww%>"
            .Unit = EXG2ANTTLib.UnitEnum.exWeek
        End With
        .Level(1).Label = "<%d1%>"
        .Level(2).Label = "<%d%>"
    End With
    .EndUpdate()
End With

 The following C# sample displays your header using 3 levels:

axG2antt1.BeginUpdate();
EXG2ANTTLib.Chart chart = axG2antt1.Chart;
chart.LevelCount = 3;
chart.get_Level(0).Label = "<b><%mmm%>, <%yyyy%></b> <r>Week: <%ww%>";
chart.get_Level(0).Unit = EXG2ANTTLib.UnitEnum.exWeek;
chart.get_Level(1).Label = "<%d1%>";
chart.get_Level(2).Label = "<%d%>";
axG2antt1.EndUpdate();

 The following C++ sample displays your header using 3 levels:

m_g2antt.BeginUpdate();
CChart chart = m_g2antt.GetChart();
chart.SetLevelCount( 3 );
chart.GetLevel(0).SetLabel(COleVariant( "<b><%mmm%>, <%yyyy%></b> <r>Week: <%ww%>" ));
chart.GetLevel(0).SetUnit(256);
chart.GetLevel(1).SetLabel(COleVariant( "<%d1%>" ));
chart.GetLevel(2).SetLabel(COleVariant( "<%d%>" ));
m_g2antt.EndUpdate();

The following VB sample enumerates the levels in the chart:

With G2antt1.Chart
    Dim i As Long
    For i = 0 To .LevelCount - 1
        With .Level(i)
            Debug.Print .Label
        End With
    Next
End With

The following C++ sample enumerates the levels in the chart:

CChart chart = m_g2antt.GetChart();
for ( long i = 0; i < chart.GetLevelCount(); i++ )
{
	CLevel level = chart.GetLevel( i );
	OutputDebugString( V2S( &level.GetLabel() ) );
}

where the V2S function converts a Variant expression to a string expression:

static CString V2S( VARIANT* pvtDate )
{
	COleVariant vtDate;
	vtDate.ChangeType( VT_BSTR, pvtDate );
	return V_BSTR( &vtDate );
}

The following VB.NET sample enumerates the levels in the chart:

With AxG2antt1.Chart
    Dim i As Long
    For i = 0 To .LevelCount - 1
        With .Level(i)
            Debug.Write(.Label())
        End With
    Next
End With

The following C# sample enumerates the levels in the chart:

for (int i = 0; i < axG2antt1.Chart.LevelCount; i++)
{
	EXG2ANTTLib.Level level = axG2antt1.Chart.get_Level(i);
	System.Diagnostics.Debug.Write(level.Label);
}

The following VFP sample enumerates the levels in the chart:

With thisform.G2antt1.Chart
    For i = 0 To .LevelCount - 1
        With .Level(i)
            wait window nowait .Label
        EndWith
    Next	
EndWith

 

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