This question applies to VB.net and C# so I posted it here in the hope I will get more answers. However, the code will be presented in VB.net. Feel free to respond in C#
The program bellow trhows an error in the line "
mTable2 = mTable.Copy". The error is:
"Unable to cast object of type 'System.Data.DataTable' to type 'InherintanceQuestion.InheritedTable". This is because mTables is an instance of the
InheritedTable class which inherits a DataTable and mTable is a DataTable. So, is there any way I can create the mTable2 to the mTable.copy to the mTable.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim mTable As New DataTable
Dim mTable2 As New InheritedTable
mTable.Columns.Add("Col1", System.Type.GetType("System.String"))
mTable.Columns.Add("Col2", System.Type.GetType("System.String"))
Dim Row As DataRow = mTable.NewRow
Row(0) = "A" : Row(1) = "B" : mTable.Rows.Add(Row)
Row = mTable.NewRow
Row(0) = "C" : Row(1) = "D" : mTable.Rows.Add(Row)
mTable2 = CType(mTable.Clone, InheritedTable).Copy 'THE ERROR OCCURS HERE
End Sub
End Class
Public Class InheritedTable
Inherits System.Data.DataTable
Private Sub DoSomething()
'Any code.
End Sub
End Class
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