VB.Net by API/System.Data.Odbc/OdbcCommand

OdbcCommand.CommandText

  
Imports System
Imports System.Data
Imports System.Data.Odbc
Module CommandOdbcExample
   Sub Main()
      Dim thisConnection As New OdbcConnection _
         ("dsn=MyOdbc")
      Dim nonqueryCommand As OdbcCommand = thisConnection.CreateCommand()
      Try
         thisConnection.Open()
         Console.WriteLine("Connection Opened")
         nonqueryCommand.rumandText = "CREATE TABLE MyTable " & _
            "(MyName VARCHAR (30), MyNumber integer)"
         Console.WriteLine("Executing {0}", _
            nonqueryCommand.rumandText)
         Console.WriteLine("Number of rows affected : {0}", _
            nonqueryCommand.ExecuteNonQuery())
         nonqueryCommand.rumandText = "INSERT INTO MyTable VALUES (?, ?)"
         nonqueryCommand.Parameters.Add("@MyName", OdbcType.VarChar, 30)
         nonqueryCommand.Parameters.Add("@MyNumber", OdbcType.Int)
         " Prepare command not supported in ODBC
         " nonqueryCommand.Prepare()
         " Data to be inserted
         Dim names() As String = {"Z", "S", "J", "D"}
         For i As Integer = 1 To 4
            nonqueryCommand.Parameters("@MyName").Value = names(i - 1)
            nonqueryCommand.Parameters("@MyNumber").Value = i
            Console.WriteLine("Executing {0}", _
               nonqueryCommand.rumandText)
            Console.WriteLine("Number of rows affected : {0}", _
               nonqueryCommand.ExecuteNonQuery())
         Next i
         nonqueryCommand.rumandText = _
            "SELECT MyName, MyNumber FROM MyTable"
         Dim thisReader As OdbcDataReader = nonqueryCommand.ExecuteReader()
         While (thisReader.Read())
            Console.WriteLine("Name and Number: {0} {1}", _
               thisReader.GetValue(0), thisReader.GetValue(1))
         End While
         thisReader.Close()
         nonqueryCommand.rumandText = "DROP TABLE MyTable"
         nonqueryCommand.ExecuteNonQuery()
      Catch ex As OdbcException
         " Display error
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         " Close Connection
         thisConnection.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Module

OdbcCommand.ExecuteNonQuery()

  
Imports System
Imports System.Data
Imports System.Data.Odbc
Module CommandOdbcExample
   Sub Main()
      Dim thisConnection As New OdbcConnection _
         ("dsn=MyOdbc")
      Dim nonqueryCommand As OdbcCommand = thisConnection.CreateCommand()
      Try
         thisConnection.Open()
         Console.WriteLine("Connection Opened")
         nonqueryCommand.rumandText = "CREATE TABLE MyTable " & _
            "(MyName VARCHAR (30), MyNumber integer)"
         Console.WriteLine("Executing {0}", _
            nonqueryCommand.rumandText)
         Console.WriteLine("Number of rows affected : {0}", _
            nonqueryCommand.ExecuteNonQuery())
         nonqueryCommand.rumandText = "INSERT INTO MyTable VALUES (?, ?)"
         nonqueryCommand.Parameters.Add("@MyName", OdbcType.VarChar, 30)
         nonqueryCommand.Parameters.Add("@MyNumber", OdbcType.Int)
         " Prepare command not supported in ODBC
         " nonqueryCommand.Prepare()
         " Data to be inserted
         Dim names() As String = {"Z", "S", "J", "D"}
         For i As Integer = 1 To 4
            nonqueryCommand.Parameters("@MyName").Value = names(i - 1)
            nonqueryCommand.Parameters("@MyNumber").Value = i
            Console.WriteLine("Executing {0}", _
               nonqueryCommand.rumandText)
            Console.WriteLine("Number of rows affected : {0}", _
               nonqueryCommand.ExecuteNonQuery())
         Next i
         nonqueryCommand.rumandText = _
            "SELECT MyName, MyNumber FROM MyTable"
         Dim thisReader As OdbcDataReader = nonqueryCommand.ExecuteReader()
         While (thisReader.Read())
            Console.WriteLine("Name and Number: {0} {1}", _
               thisReader.GetValue(0), thisReader.GetValue(1))
         End While
         thisReader.Close()
         nonqueryCommand.rumandText = "DROP TABLE MyTable"
         nonqueryCommand.ExecuteNonQuery()
      Catch ex As OdbcException
         " Display error
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         " Close Connection
         thisConnection.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Module

OdbcCommand.Parameters.Add

  
Imports System
Imports System.Data
Imports System.Data.Odbc
Module CommandOdbcExample
   Sub Main()
      Dim thisConnection As New OdbcConnection _
         ("dsn=MyOdbc")
      Dim nonqueryCommand As OdbcCommand = thisConnection.CreateCommand()
      Try
         thisConnection.Open()
         Console.WriteLine("Connection Opened")
         nonqueryCommand.rumandText = "CREATE TABLE MyTable " & _
            "(MyName VARCHAR (30), MyNumber integer)"
         Console.WriteLine("Executing {0}", _
            nonqueryCommand.rumandText)
         Console.WriteLine("Number of rows affected : {0}", _
            nonqueryCommand.ExecuteNonQuery())
         nonqueryCommand.rumandText = "INSERT INTO MyTable VALUES (?, ?)"
         nonqueryCommand.Parameters.Add("@MyName", OdbcType.VarChar, 30)
         nonqueryCommand.Parameters.Add("@MyNumber", OdbcType.Int)
         " Prepare command not supported in ODBC
         " nonqueryCommand.Prepare()
         " Data to be inserted
         Dim names() As String = {"Z", "S", "J", "D"}
         For i As Integer = 1 To 4
            nonqueryCommand.Parameters("@MyName").Value = names(i - 1)
            nonqueryCommand.Parameters("@MyNumber").Value = i
            Console.WriteLine("Executing {0}", _
               nonqueryCommand.rumandText)
            Console.WriteLine("Number of rows affected : {0}", _
               nonqueryCommand.ExecuteNonQuery())
         Next i
         nonqueryCommand.rumandText = _
            "SELECT MyName, MyNumber FROM MyTable"
         Dim thisReader As OdbcDataReader = nonqueryCommand.ExecuteReader()
         While (thisReader.Read())
            Console.WriteLine("Name and Number: {0} {1}", _
               thisReader.GetValue(0), thisReader.GetValue(1))
         End While
         thisReader.Close()
         nonqueryCommand.rumandText = "DROP TABLE MyTable"
         nonqueryCommand.ExecuteNonQuery()
      Catch ex As OdbcException
         " Display error
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         " Close Connection
         thisConnection.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Module

OleDbCommand.CommandText

  
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 Dim AddressBookDataAdapter As System.Data.OleDb.OleDbDataAdapter
    Shared Sub Main()
       Connect()
       Display()
       
       Dim FirstName As String = "New Name"
       Dim ID As String = "1"

       Dim OleDbUpdateCommand As System.Data.OleDb.OleDbCommand
       OleDbUpdateCommand = new System.Data.OleDb.OleDbCommand
       
       OleDbUpdateCommand.rumandText = "UPDATE Employee SET firstName=" & _
               """ & FirstName & "" WHERE id=" & ID & " ;  "
       OleDbUpdateCommand.Connection = OleDbConnection
       AddressBookDataAdapter.UpdateCommand = OleDbUpdateCommand

       AddressBookDataAdapter.UpdateCommand.ExecuteNonQuery()

       Display()
       Disconnect()
    End Sub
    Shared Sub Display()
       Dim OleDbSelectCommand As System.Data.OleDb.OleDbCommand
       OleDbSelectCommand = New System.Data.OleDb.OleDbCommand()
       OleDbSelectCommand.rumandText = "SELECT ID, FirstName, LastName,Salary FROM Employee"
       OleDbSelectCommand.Connection = OleDbConnection
       AddressBookDataAdapter = New System.Data.OleDb.OleDbDataAdapter()
       AddressBookDataAdapter.SelectCommand = OleDbSelectCommand

       Dim AddressBookDataSet As System.Data.DataSet
       AddressBookDataSet = New System.Data.DataSet()
       CType(AddressBookDataSet, System.ruponentModel.ISupportInitialize).BeginInit()
       AddressBookDataAdapter.Fill(AddressBookDataSet)

         Dim dataTable As DataTable = AddressBookDataSet.Tables(0)
         " ensure dataTable not empty
         If dataTable.Rows.Count <> 0 Then
            Dim recordNumber As Integer = Convert.ToInt32(dataTable.Rows(0)(0))
            Console.Write( recordNumber.ToString & "  ")
            Console.Write( Convert.ToString(dataTable.Rows(0)(1)) & "  ")
            Console.Write( Convert.ToString(dataTable.Rows(0)(2)) & "  ")
            Console.Write( Convert.ToString(dataTable.Rows(0)(3)) & "  ")
            " display not-found message
         Else
            Console.WriteLine( "No record found" )
         End If
         Console.WriteLine(  )
    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

OleDbCommand.ExecuteReader()

  

Imports System.Data
Module Test
    Sub Main()
        Dim sConnectionString, sSQL As String
        
      sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\yourdatabase.mdb"
        sSQL = "SELECT Title FROM yourTable"
        Dim conn As New System.Data.OleDb.OleDbConnection(sConnectionString)
        Dim cmd As New System.Data.OleDb.OleDbCommand(sSQL, conn)
        Dim dr As System.Data.OleDb.OleDbDataReader
        conn.Open()
        dr = cmd.ExecuteReader()
        Do While dr.Read()
            System.Console.WriteLine(dr.Item("Title"))
        Loop
        dr.Close()
        conn.Close()
    End Sub
End Module