frmbackup.vb

基于VB.NET开发的简单的图书馆管理系统,可正常运行以测试,内带源码.

Imports System.Data
Imports System.Data.sqlclient
Public Class frmbackup
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents tbpath As System.Windows.Forms.TextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents bnbegin As System.Windows.Forms.Button
    Friend WithEvents bncancel As System.Windows.Forms.Button
    Friend WithEvents bnpath As System.Windows.Forms.Button
    Friend WithEvents dlgpath As System.Windows.Forms.SaveFileDialog
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(frmbackup))
        Me.tbpath = New System.Windows.Forms.TextBox
        Me.bnpath = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.bnbegin = New System.Windows.Forms.Button
        Me.bncancel = New System.Windows.Forms.Button
        Me.dlgpath = New System.Windows.Forms.SaveFileDialog
        Me.SuspendLayout()
        '
        'tbpath
        '
        Me.tbpath.Location = New System.Drawing.Point(96, 40)
        Me.tbpath.Name = "tbpath"
        Me.tbpath.Size = New System.Drawing.Size(168, 21)
        Me.tbpath.TabIndex = 0
        Me.tbpath.Text = ""
        '
        'bnpath
        '
        Me.bnpath.Location = New System.Drawing.Point(280, 40)
        Me.bnpath.Name = "bnpath"
        Me.bnpath.TabIndex = 1
        Me.bnpath.Text = "选择路径"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(24, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(72, 23)
        Me.Label1.TabIndex = 2
        Me.Label1.Text = "备份路径："
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'bnbegin
        '
        Me.bnbegin.Location = New System.Drawing.Point(56, 88)
        Me.bnbegin.Name = "bnbegin"
        Me.bnbegin.TabIndex = 3
        Me.bnbegin.Text = "开始"
        '
        'bncancel
        '
        Me.bncancel.Location = New System.Drawing.Point(208, 88)
        Me.bncancel.Name = "bncancel"
        Me.bncancel.TabIndex = 4
        Me.bncancel.Text = "取消"
        '
        'dlgpath
        '
        Me.dlgpath.Title = "把数据库备份到"
        '
        'frmbackup
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(384, 165)
        Me.Controls.Add(Me.bncancel)
        Me.Controls.Add(Me.bnbegin)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.bnpath)
        Me.Controls.Add(Me.tbpath)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.Name = "frmbackup"
        Me.Text = "----------数据库备份"
        Me.ResumeLayout(False)

    End Sub

#End Region


    Private Sub bnpath_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnpath.Click
        dlgpath.ShowDialog()
        tbpath.Text = dlgpath.FileName
    End Sub


    Private Sub bnbegin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnbegin.Click
        If tbpath.Text = "" Then
            MessageBox.Show("请输入备份文件路径")
            Exit Sub

        End If
        Dim filepath = tbpath.Text.Trim

        '输入值完整并可用，插入记录到数据库
        Dim strSource As String = "workstation id=郭洪博;packet size=4096;integrated security=SSPI;initial catalog=books;persist security info=False"
        Dim strinsert As String = "backup database books to disk='" + filepath + "'"
        Dim conn As New SqlConnection(strSource)


        Try
            conn.Open()
            Dim cmd As New SqlCommand(strinsert, conn)
            Dim ret As Integer = cmd.ExecuteNonQuery()
            If ret <> 1 Then
                MessageBox.Show("备份成功！")
            Else
                MessageBox.Show("备份失败")
            End If
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
        End Try

        conn.Close()
    End Sub

    Private Sub bncancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bncancel.Click
        Me.Close()
    End Sub

    Private Sub frmbackup_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub
End Class