vb连接数据库的代码

Imports System.Data.OleDb

Module Module1
    Sub Main()
        Dim connectionString As String = "Provider=SQLOLEDB;Data Source=your_server_name;Initial Catalog=your_database_name;Integrated Security=SSPI;"
        Dim connection As New OleDbConnection(connectionString)
        
        Try
            connection.Open()
            Console.WriteLine("Connected to the database.")
            
            Dim command As New OleDbCommand("SELECT * FROM your_table_name", connection)
            Dim reader As OleDbDataReader = command.ExecuteReader()
            
            While reader.Read()
                Console.WriteLine(reader("your_column_name"))
            End While
            
            reader.Close()
        Catch ex As Exception
            Console.WriteLine("Error: " & ex.Message)
        Finally
            connection.Close()
        End Try
    End Sub
End Module