imports System
imports System.data
imports Microsoft.VisualBasic
imports sql = System.Data.SqlClient

public module MyModule
	Private intIndex as Integer = 0
	Private dv as New DataView

	sub Main
		NorthwindDataSetDataViewLoop()
        AnyKey
	end sub


Private Sub NorthwindDataSetDataViewLoop()
		Dim strSQL as String = "user id=sa;integrated security=SSPI;data source='(local)';Database=Northwind;"

		Dim cn AS new sql.SqlConnection
		cn.ConnectionString = strSQL

		Try
			' Setup Command
			Dim cmd as new sql.SqlCommand
			cmd.CommandText = "SELECT * FROM [Customers]"
			cmd.CommandType = CommandType.Text
			cmd.Connection = cn

			Dim da as new sql.SqlDataAdapter
			da.SelectCommand = cmd

			Dim ds as New DataSet
			da.Fill(ds, "MyTableName")

            dv = New DataView(ds.Tables(0))			'<<<<<<<<<<<<<<<<<<<<<<<<<<<< DataView
			dv.RowFilter = "ContactName LIKE 'A%'"	'<<<<<<<<<<<<<<<<<<<<<<<<<<<< RowFilter
			dv.Sort = "ContactName"					'<<<<<<<<<<<<<<<<<<<<<<<<<<<< Sort

			Wpad("Customer ID")
			Wpad("Contact Name")
			Wpad("Company Name")
			WL("")
			Wline()
			Wline()
			Wline()
			WL("")
			WL("")
			For intIndex = 0 TO dv.count - 1	'<<<<<<<<<<<<<<<<<<<<<<<<<<<< Iterating through the DataView
				Dim strCustomerID As String = dv.Item(intIndex).Item(0).tostring
				Dim strContactName As String = dv.Item(intIndex).Item("ContactName").tostring
				Dim strCompanyName As String = dv.Item(intIndex).Item("CompanyName").tostring
				Wpad(strCustomerID)
				Wpad(strContactName)
				Wpad(strCompanyName)
				WL("")
			next

			cmd = Nothing
			da = Nothing
			cn.Close()
			cn = Nothing

		Catch ex As Exception 
			WL("Error", ex.Message.tostring)
		End Try
	End Sub

	Sub Wline() ' paramarray 
		Dim str As String  = "--------------------------------------------"
		Dim strOutput AS sTring = Right(str,19).PadRight(20)
		Console.Write(strOutput)
	end sub

	Sub Wpad(str as string) ' paramarray 
		Dim strOutput As String 
		strOutput = Right(str,20).PadRight(20)
		Console.Write(strOutput)
	end sub


	sub WL(strItem as string, objValue as Object) ' paramarray 
		Dim strValue As String = CType(objValue, String)
		Console.WriteLine(strItem & ": [" & strValue & "]")
	end sub

	sub WL(strItem as string) 
		Console.WriteLine(strItem)
	end sub

	sub AnyKey()
		WL("")
		Console.Write("Press enter key to continue...  ")
		RL()
	end Sub


	sub Show(obj as Object)
		Dim str As String = Ctype(obj, String)
		Console.write(str & "... " )
		Console.Write("Press enter key to continue...  ")
		RL()
	end Sub

	sub RL
		Console.Readline()
	End Sub

end module