Public Overloads Overridable Sub Clear( _
   ByVal row As Integer, _
   ByVal column As Integer, _
   ByVal rowCount As Integer, _
   ByVal columnCount As Integer _
) 

Dim instance As DefaultSheetSpanModel
Dim row As Integer
Dim column As Integer
Dim rowCount As Integer
Dim columnCount As Integer
 
instance.Clear(row, column, rowCount, columnCount)

public virtual void Clear( 
   int row,
   int column,
   int rowCount,
   int columnCount
)

private void Page_Load(object sender,System.EventArgs e)
{
if(this.IsPostBack)return;

bool b1;
FarPoint.Web.Spread.Model.CellRange range;
FpSpread1.ActiveSheetView.ColumnCount=10;
FpSpread1.ActiveSheetView.RowCount=10;
FpSpread1.ActiveSheetView.ColumnHeader.RowCount=3;
FarPoint.Web.Spread.Model.ISheetSpanModel model=FpSpread1.ActiveSheetView.ColumnHeaderSpanModel;
model.Add(0,0,3,3);
range=model.Find(2,2);
b1=model.IsEmpty();
ListBox1.Items.Add(range.ToString());
ListBox1.Items.Add(Convert.ToString(model.GetEnumerator(0,0,3,3)));
ListBox1.Items.Add(Convert.ToString(b1));
}

private void Button1_Click(object sender,System.EventArgs e)
{
FarPoint.Web.Spread.Model.DefaultSheetSpanModel model=(FarPoint.Web.Spread.Model.DefaultSheetSpanModel)FpSpread1.ActiveSheetView.ColumnHeaderSpanModel;
model.Clear(0,0,3,3);
}

Private Sub Page_Load(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles MyBase.Load

If(IsPostBack)Then Return

Dim range As FarPoint.Web.Spread.Model.CellRange
Dim b1 As Boolean
FpSpread1.ActiveSheetView.ColumnCount=10
FpSpread1.ActiveSheetView.RowCount=10
FpSpread1.ActiveSheetView.ColumnHeader.RowCount=3
Dim model As FarPoint.Web.Spread.Model.ISheetSpanModel=FpSpread1.ActiveSheetView.ColumnHeaderSpanModel
model.Add(0,0,3,3)
range=model.Find(2,2)
b1=model.IsEmpty()
ListBox1.Items.Add(range.ToString)
ListBox1.Items.Add(Convert.ToString(model.GetEnumerator(0,0,3,3)))
ListBox1.Items.Add(b1)
End Sub

Private Sub Button1_Click(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles Button1.Click
Dim model As FarPoint.Web.Spread.Model.DefaultSheetSpanModel=FpSpread1.ActiveSheetView.ColumnHeaderSpanModel
model.Clear(0,0,3,3)
End Sub