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Bit 'And' Operation on Datatable Integer Column

Bit 'And' Operation on Datatable Integer Column

Bit 'And' Operation on Datatable Integer Column

Testing some code to set a row filter on a table with an integer column using the bit "And" operator.
Can't seem to get it to work.
Sadly I think I ran across this a while ago and don't remember how I got around it.


Dim myTable As New DataTable
 myTable.Columns.Add("Desc", Type.GetType("System.String"))
 myTable.Columns.Add("KeyNbr", Type.GetType("System.Int32"))

 myTable.Rows.Add("Open", 2)
 myTable.Rows.Add("Hold", 4)
 myTable.Rows.Add("Covered", 8)
 myTable.Rows.Add("Complete", 16)

 Dim Compare As Integer = 10

 myTable.DefaultView.RowFilter = "(KeyNbr And " & Compare.ToString & ") > 0" 
I've tried changing the Int32 to Int16, but did not help.
I get an error something like the following.
".net cannot perform 'and' operation on system.int32 and system.int32"
Must be something simple I'm missing.
Can I not use an integer as large as Int32?

Sylvania/Toledo Ohio

RE: Bit 'And' Operation on Datatable Integer Column

On further investigation this is not possible.
I can use the following to get around this because these are really small tables I'm working with.


myTable.Columns.Add("Desc", Type.GetType("System.String"))
 myTable.Columns.Add("KeyNbr", Type.GetType("System.Int16"))
 myTable.Columns.Add("Available", Type.GetType("System.Int16"))

 myTable.Rows.Add("Open", 2, 0)
 myTable.Rows.Add("Hold", 4, 0)
 myTable.Rows.Add("Covered", 8, 0)
 myTable.Rows.Add("Dispatch", 16, 0)

 ' Don't forget to clear Available if doing this more than once and reset the rowfilter
 Dim Cmp As System.Int16 = 20
 myTable.DefaultView.RowFilter = "" 
For Each dr As DataRow In myTable.Rows
   If (CInt(dr.Item("KeyNbr")) And Cmp) > 0 Then
     dr.Item("Available") = 1
     dr.Item("Available") = 0
   End If

 myTable.DefaultView.RowFilter = "Available = 1" 

Sylvania/Toledo Ohio

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