前言：笔者把学习的webpack知识从基础到原理写个系列，以便回顾。希望能帮助到更多正在学习webpack的小伙伴。

这个配置文件是命令npm run dev

实例

创建目录webpack-study，然后分别创建如下文件

// $root/com-demo.js
export default function(){
    document.write("Hello world. com-demo.js");
} 

我是编程乐趣，一个10年.Net开发经验老程序员，点击右上方“关注”，每天为你分享开源项目和编程知识。

Imports System.Data.SQLite

Public Class MainForm
    ' 数据库连接字符串
    Dim connectionString As String = "Data Source=mydatabase.db"

    ' 数据绑定的数据源
    Dim bindingSource As New BindingSource()

    ' 分页相关的变量
    Dim pageSize As Integer = 10
    Dim currentPage As Integer = 1

    Private Sub MainForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        ' 初始化带有 BindingSource 的 DataGridView
        dgvUsers.DataSource = bindingSource

        ' 加载初始页面
        LoadPage(currentPage)
    End Sub

    Private Sub btnNextPage_Click(sender As Object, e As EventArgs) Handles btnNextPage.Click
        ' 加载下一页
        currentPage += 1
        LoadPage(currentPage)
    End Sub

    Private Sub btnPreviousPage_Click(sender As Object, e As EventArgs) Handles btnPreviousPage.Click
        ' 确保不要到达负页数
        If currentPage > 1 Then
            ' 加载上一页
            currentPage -= 1
            LoadPage(currentPage)
        End If
    End Sub

    Private Sub LoadPage(pageNumber As Integer)
        ' 计算当前页面的偏移量
        Dim offset As Integer = (pageNumber - 1) * pageSize

        ' 从数据库中读取一页记录
        Dim userRecords As List(Of User) = ReadUserRecords(pageSize, offset)

        ' 将记录绑定到 DataGridView
        bindingSource.DataSource = userRecords
    End Sub

    Private Function ReadUserRecords(limit As Integer, offset As Integer) As List(Of User)
        ' 选择数据库中的一页用户的 SQL 查询
        Dim query As String = #34;SELECT Username, Password FROM Users LIMIT {limit} OFFSET {offset}"

        Dim userRecords As New List(Of User)()

        Using connection As New SQLiteConnection(connectionString)
            connection.Open()

            Using command As New SQLiteCommand(query, connection)
                Using reader As SQLiteDataReader = command.ExecuteReader()
                    ' 遍历记录
                    While reader.Read()
                        Dim userRecord As New User()
                        userRecord.Username = reader.GetString(0)
                        userRecord.Password = reader.GetString(1)
                        userRecords.Add(userRecord)
                    End While
                End Using
            End Using
        End Using

        Return userRecords
    End Function
End Class

' 存储检索数据的 User 类
Public Class User
    Public Property Username As String
    Public Property Password As String
End Class

VBA，英文全称Visual Basic for Applications，直接翻译过来叫做“可以直接使用的VB语言”。

Smtp对象提供了多种方法和属性来调整优化发送消息的过程。可以创建一个新的Smtp对象实例，如下所示：

C#:

Smtp mailer = new Smtp;

VB.NET:

Dim mailer As New Smtp

如果SMTP服务器不需要任何身份验证，那么指定的主机名或它的IP地址就足以连接到此SMTP服务器。