VB.NET OleDbDataAdapter.SelectCommand属性代码示例

Public Shared Function CreateCustomerAdapter( _
    connection As OleDbConnection) As OleDbDataAdapter 

    Dim adapter As New OleDbDataAdapter()
    Dim command As OleDbCommand

    ' Create the SelectCommand.
    command = New OleDbCommand("SELECT * FROM Customers " & _
        "WHERE Country = ? AND City = ?", connection)

    command.Parameters.Add("Country", OleDbType.VarChar, 15)
    command.Parameters.Add("City", OleDbType.VarChar, 15)

    adapter.SelectCommand = command

    ' Create the InsertCommand.
    command = New OleDbCommand( _
        "INSERT INTO Customers (CustomerID, CompanyName) " & _
        "VALUES (?, ?)", connection)

    command.Parameters.Add( _
        "CustomerID", OleDbType.Char, 5, "CustomerID")
    command.Parameters.Add( _
        "CompanyName", OleDbType.VarChar, 40, "CompanyName")

    adapter.InsertCommand = command
    Return adapter
End Function

' 导入命名空间
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Collections
Imports System.Windows.Forms
Imports System.Resources

Public Class MainClass
    Shared Dim OleDbConnection As System.Data.OleDb.OleDbConnection

    Shared Sub Main()
       Connect()
       Dim OleDbSelectCommand As System.Data.OleDb.OleDbCommand
       OleDbSelectCommand = New System.Data.OleDb.OleDbCommand()

       OleDbSelectCommand.CommandText = "SELECT ID, FirstName, LastName,Salary FROM Employee"
       OleDbSelectCommand.Connection = OleDbConnection

       Dim AddressBookDataAdapter As System.Data.OleDb.OleDbDataAdapter
       AddressBookDataAdapter = New System.Data.OleDb.OleDbDataAdapter()

       AddressBookDataAdapter.SelectCommand = OleDbSelectCommand


       Dim AddressBookDataSet As System.Data.DataSet
       AddressBookDataSet = New System.Data.DataSet()
       CType(AddressBookDataSet, System.ComponentModel.ISupportInitialize).EndInit()

       AddressBookDataAdapter.Fill(AddressBookDataSet)


         Dim dataTable As DataTable = AddressBookDataSet.Tables(0)

         If dataTable.Rows.Count <> 0 Then
            Dim recordNumber As Integer = Convert.ToInt32(dataTable.Rows(0)(0))

            Console.WriteLine( recordNumber.ToString )
            Console.WriteLine( Convert.ToString(dataTable.Rows(0)(1)) )
            Console.WriteLine( Convert.ToString(dataTable.Rows(0)(2)) )
            Console.WriteLine( Convert.ToString(dataTable.Rows(0)(3)) )

            ' display not-found message
         Else
            Console.WriteLine( "No record found" )
         End If


    End Sub

    Shared Sub Connect()
      OleDbConnection = New System.Data.OleDb.OleDbConnection()

      OleDbConnection.ConnectionString = _
         "Provider=Microsoft.Jet.OLEDB.4.0;Password="""";" & _
         "User ID=Admin;Data Source=Employee.mdb;Mode=Sha" & _
         "re Deny None;Extended Properties="""";" & _
         "Jet OLEDB:System database="""";Jet OLEDB:Regis" & _
         "try Path="""";Jet OLEDB:Database Password="""";" & _
         "Jet OLEDB:Engine Type=5;Jet OLEDB:Dat" & _
         "abase Locking Mode=1;Jet OLEDB:Global Partial " & _
         "Bulk Ops=2;Jet OLEDB:Global Bulk T" & _
         "ransactions=1;Jet OLEDB:New Database " & _
         "Password="""";Jet OLEDB:Create System Databas" & _
         "e=False;Jet OLEDB:Encrypt Database=False;" & _
         "Jet OLEDB:Don't Copy Locale on Compact=" & _
         "False;Jet OLEDB:Compact Without Replica " & _
         "Repair=False;Jet OLEDB:SFP=False"


      Try
         OleDbConnection.Open()
      Catch ex As Exception
         Console.WriteLine(ex.Message)
      End Try
    End Sub

    Shared Sub Disconnect()
      Try
         OleDbConnection.Close()
      Catch ex As Exception
         Console.WriteLine(ex.Message)
      End Try
    End Sub

End Class