Mega Code Archive
New DataTableMapping
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Imports System
Imports System.Xml
Imports System.Xml.Schema
Imports System.IO
Imports System.Data.OleDb
Imports System.Data.Common
Imports System.Data
Public Class MainClass
Shared Sub DoDataMappings(ByVal da As OleDbDataAdapter)
Try
' Define an array of column to map
Dim dcmMappedColumns() As DataColumnMapping = { _
New DataColumnMapping("ID", "EmployeeID"), _
New DataColumnMapping("FirstName", "FirstName"), _
New DataColumnMapping("LastName", "LastName")}
' Define the table containing the mapped columns
Dim dtmUsers As New DataTableMapping("Table", "Employee", _
dcmMappedColumns)
' Activate the mapping mechanism
da.TableMappings.Add(dtmUsers)
Catch ex As Exception
' An error occurred. Show the error message
Console.WriteLine(ex.Message)
End Try
End Sub
Shared Sub Main()
Try
' Define a connection object
Dim dbConn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Password=;User ID=Admin;Data Source=Employee.mdb")
' Create a data adapter to retrieve records from db
Dim daUsers As New OleDbDataAdapter("SELECT ID, FirstName, LastName FROM Employee", dbConn)
Dim dsUsers As New DataSet("Employee")
DoDataMappings(daUsers)
' Fill the dataset
daUsers.Fill(dsUsers)
' Go through the records and print them using the mapped names
Dim r As DataRow
For Each r In dsUsers.Tables("Employee").Rows
Console.WriteLine("ID: {0}, FirstName: {1}, LastName: {2}", r("EmployeeID"), r("FirstName"), r("LastName"))
Next
Catch ex As Exception
' An error occurred. Show the error message
Console.WriteLine(ex.Message)
End Try
End Sub
End Class
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