数据库vb源代码

Imports System.Data.SqlClient

Module Module1
    Sub Main()
        Dim connectionString As String = "Server=your_server;Database=your_database;User Id=your_username;Password=your_password;"
        Dim connection As New SqlConnection(connectionString)
        
        Try
            connection.Open()
            Console.WriteLine("数据库连接成功！")
            
            Dim command As New SqlCommand("SELECT * FROM your_table", connection)
            Dim reader As SqlDataReader = command.ExecuteReader()
            
            While reader.Read()
                Console.WriteLine(reader("your_column"))
            End While
            
            reader.Close()
        Catch ex As Exception
            Console.WriteLine("数据库连接或查询出错：" & ex.Message)
        Finally
            connection.Close()
        End Try
    End Sub
End Module