Public Sub ExpandAll( _
   ByVal expand As Boolean _
) 

Dim instance As SheetView
Dim expand As Boolean
 
instance.ExpandAll(expand)

public void ExpandAll( 
   bool expand
)

FpSpread1.HierarchicalView = true;
System.Data.DataSet ds = new System.Data.DataSet();
System.Data.DataTable name;
System.Data.DataTable city;
name = ds.Tables.Add("Customers");
name.Columns.AddRange(new System.Data.DataColumn[] { new System.Data.DataColumn("LastName", typeof(string)), new System.Data.DataColumn("FirstName", typeof(string)), new System.Data.DataColumn("ID", typeof(Int32)) });
name.Rows.Add(new object[] { "Fielding", "William", 0 });
name.Rows.Add(new object[] { "Williams", "Arthur", 1 });
name.Rows.Add(new object[] { "Zuchini", "Theodore", 2 });
city = ds.Tables.Add("City/State");
city.Columns.AddRange(new System.Data.DataColumn[] { new System.Data.DataColumn("City", typeof(string)), new System.Data.DataColumn("Owner", typeof(Int32)), new System.Data.DataColumn("State", typeof(string)) });
city.Rows.Add(new object[] { "Atlanta", 0, "Georgia" });
city.Rows.Add(new object[] { "Boston", 1, "Mass." });
city.Rows.Add(new object[] { "Tampa", 2, "Fla." });
ds.Relations.Add("City/State", name.Columns["ID"], city.Columns["Owner"]);

FpSpread1.DataSource = ds;
FpSpread1.Sheets[0].ExpandAll(true);

FpSpread1.HierarchicalView = True
Dim ds As New System.Data.DataSet
Dim name As DataTable
Dim city As DataTable
name = ds.Tables.Add("Customers")
name.Columns.AddRange(New DataColumn() {New DataColumn("LastName", Type.GetType("System.String")), New DataColumn("FirstName", Type.GetType("System.String")), New DataColumn("ID", Type.GetType("System.Int32"))})
name.Rows.Add(New Object() {"Fielding", "William", 0}) 
name.Rows.Add(New Object() {"Williams", "Arthur", 1}) 
name.Rows.Add(New Object() {"Zuchini", "Theodore", 2}) 
city = ds.Tables.Add("City/State") 
city.Columns.AddRange(New DataColumn() {New DataColumn("City", Type.GetType("System.String")), New DataColumn("Owner", Type.GetType("System.Int32")), New DataColumn("State", Type.GetType("System.String"))})
city.Rows.Add(New Object() {"Atlanta", 0, "Georgia"}) 
city.Rows.Add(New Object() {"Boston", 1, "Mass."}) 
city.Rows.Add(New Object() {"Tampa", 2, "Fla."}) 
ds.Relations.Add("City/State", name.Columns("ID"), city.Columns("Owner"))
FpSpread1.DataSource = ds
FpSpread1.Sheets(0).ExpandAll(True)