frmqs.vb

这是我用VB和SQL制作的教材购销系统,希望大家提出宝贵意见.

Public Class Frmqs
    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 Label2 As System.Windows.Forms.Label
    Friend WithEvents Button4 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label5 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button5 As System.Windows.Forms.Button
    Friend WithEvents Button6 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label2 = New System.Windows.Forms.Label
        Me.Button4 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button1 = New System.Windows.Forms.Button
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Label5 = New System.Windows.Forms.Label
        Me.Label4 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button5 = New System.Windows.Forms.Button
        Me.Button6 = New System.Windows.Forms.Button
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'Label2
        '
        Me.Label2.Font = New System.Drawing.Font("楷体_GB2312", 15.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label2.ForeColor = System.Drawing.Color.Navy
        Me.Label2.Location = New System.Drawing.Point(88, 24)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(160, 24)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "学生缺书一览表"
        '
        'Button4
        '
        Me.Button4.Location = New System.Drawing.Point(224, 184)
        Me.Button4.Name = "Button4"
        Me.Button4.Size = New System.Drawing.Size(64, 24)
        Me.Button4.TabIndex = 12
        Me.Button4.Text = "最后"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(224, 104)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(64, 24)
        Me.Button3.TabIndex = 11
        Me.Button3.Text = "下一个"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(224, 144)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(64, 24)
        Me.Button2.TabIndex = 10
        Me.Button2.Text = "上一个"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(224, 70)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(64, 24)
        Me.Button1.TabIndex = 9
        Me.Button1.Text = "第一条"
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.TextBox4)
        Me.GroupBox1.Controls.Add(Me.TextBox3)
        Me.GroupBox1.Controls.Add(Me.TextBox2)
        Me.GroupBox1.Controls.Add(Me.TextBox1)
        Me.GroupBox1.Controls.Add(Me.Label5)
        Me.GroupBox1.Controls.Add(Me.Label4)
        Me.GroupBox1.Controls.Add(Me.Label3)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.Location = New System.Drawing.Point(8, 62)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(184, 186)
        Me.GroupBox1.TabIndex = 8
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "基本信息"
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(88, 144)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.Size = New System.Drawing.Size(72, 21)
        Me.TextBox4.TabIndex = 7
        Me.TextBox4.Text = ""
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(88, 104)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(72, 21)
        Me.TextBox3.TabIndex = 6
        Me.TextBox3.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(88, 64)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(72, 21)
        Me.TextBox2.TabIndex = 5
        Me.TextBox2.Text = ""
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(88, 24)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(72, 21)
        Me.TextBox1.TabIndex = 4
        Me.TextBox1.Text = ""
        '
        'Label5
        '
        Me.Label5.Location = New System.Drawing.Point(16, 144)
        Me.Label5.Name = "Label5"
        Me.Label5.Size = New System.Drawing.Size(56, 24)
        Me.Label5.TabIndex = 3
        Me.Label5.Text = "书  号："
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(16, 104)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(56, 24)
        Me.Label4.TabIndex = 2
        Me.Label4.Text = "数　量："
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(16, 64)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(56, 24)
        Me.Label3.TabIndex = 1
        Me.Label3.Text = "姓　名："
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(16, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(56, 24)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "书　名："
        '
        'Button5
        '
        Me.Button5.Location = New System.Drawing.Point(224, 224)
        Me.Button5.Name = "Button5"
        Me.Button5.Size = New System.Drawing.Size(64, 24)
        Me.Button5.TabIndex = 13
        Me.Button5.Text = "确定"
        '
        'Button6
        '
        Me.Button6.Location = New System.Drawing.Point(224, 264)
        Me.Button6.Name = "Button6"
        Me.Button6.Size = New System.Drawing.Size(64, 24)
        Me.Button6.TabIndex = 14
        Me.Button6.Text = "退出"
        '
        'Frmqs
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(360, 325)
        Me.Controls.Add(Me.Button6)
        Me.Controls.Add(Me.Button5)
        Me.Controls.Add(Me.Button4)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.GroupBox1)
        Me.Controls.Add(Me.Label2)
        Me.Name = "Frmqs"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Frmqs"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Frmqs_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim sqlstr As String
        sqlstr = "select * from qsdj "
        Dim ds As New DataSet
        ds.Clear()
        ds = GetDataFromDB(sqlstr)
        Me.TextBox1.Text = ds.Tables(0).Rows(0)("书名")
        Me.TextBox2.Text = ds.Tables(0).Rows(0)("姓名")
        Me.TextBox3.Text = ds.Tables(0).Rows(0)("数量")
        Me.TextBox4.Text = ds.Tables(0).Rows(0)("书号")
        Button2.Enabled = False
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Button3.Enabled = True
        Dim sqlstr As String
        sqlstr = "select * from qsdj "
        Dim ds As New DataSet
        ds.Clear()
        ds = GetDataFromDB(sqlstr)
        Me.BindingContext(ds, "qsdj").Position -= 1
        If Me.BindingContext(ds, "qsdj").Position = 0 Then
            Button2.Enabled = False
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim sqlstr As String
        sqlstr = "select * from qsdj "
        Dim ds As New DataSet
        ds.Clear()
        ds = GetDataFromDB(sqlstr)
        Me.BindingContext(ds, "qsdj").Position = 0
        Button2.Enabled = False
        Button3.Enabled = True
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Button2.Enabled = True
        Dim sqlstr As String
        sqlstr = "select * from qsdj "
        Dim ds As New DataSet
        ds.Clear()
        ds = GetDataFromDB(sqlstr)
        Me.BindingContext(ds, "qsdj").Position += 1
        If Me.BindingContext(ds, "qsdj").Position = Me.BindingContext(ds, "qsdj").Count Then
            Button3.Enabled = False
        End If
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        Dim sqlstr As String
        sqlstr = "select * from qsdj "
        Dim ds As New DataSet
        ds.Clear()
        ds = GetDataFromDB(sqlstr)
        Me.BindingContext(ds, "qsdj").Position = Me.BindingContext(ds, "qsdj").Count
        Button2.Enabled = True
        Button3.Enabled = False
    End Sub

    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        
        Me.Finalize()

    End Sub
End Class