frmsearcher.vb

这是网络版的图书管理

Public Class frmSearcher
    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

    '窗体重写处置以清理组件列表。
    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 GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents GroupBox2 As System.Windows.Forms.GroupBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents ComboBox2 As System.Windows.Forms.ComboBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox()
        Me.Label3 = New System.Windows.Forms.Label()
        Me.ComboBox2 = New System.Windows.Forms.ComboBox()
        Me.ComboBox1 = New System.Windows.Forms.ComboBox()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.GroupBox2 = New System.Windows.Forms.GroupBox()
        Me.DataGrid1 = New System.Windows.Forms.DataGrid()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.TextBox1 = New System.Windows.Forms.TextBox()
        Me.GroupBox1.SuspendLayout()
        Me.GroupBox2.SuspendLayout()
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(192, Byte), CType(192, Byte))
        Me.GroupBox1.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label3, Me.ComboBox2, Me.ComboBox1, Me.Label2, Me.Button1, Me.GroupBox2, Me.Label1, Me.TextBox1})
        Me.GroupBox1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(440, 383)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        '
        'Label3
        '
        Me.Label3.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(192, Byte), CType(192, Byte))
        Me.Label3.ForeColor = System.Drawing.Color.Blue
        Me.Label3.Location = New System.Drawing.Point(16, 16)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(64, 32)
        Me.Label3.TabIndex = 7
        Me.Label3.Text = "查询条件"
        Me.Label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'ComboBox2
        '
        Me.ComboBox2.Items.AddRange(New Object() {"图书 ISBN ", "借阅人学号"})
        Me.ComboBox2.Location = New System.Drawing.Point(88, 88)
        Me.ComboBox2.Name = "ComboBox2"
        Me.ComboBox2.Size = New System.Drawing.Size(184, 20)
        Me.ComboBox2.TabIndex = 6
        Me.ComboBox2.Text = "借阅人学号"
        '
        'ComboBox1
        '
        Me.ComboBox1.Items.AddRange(New Object() {"个人借阅查询", "个人借阅统计", "馆藏书籍查询"})
        Me.ComboBox1.Location = New System.Drawing.Point(88, 56)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(184, 20)
        Me.ComboBox1.TabIndex = 5
        Me.ComboBox1.Text = "个人借阅查询"
        '
        'Label2
        '
        Me.Label2.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(192, Byte), CType(192, Byte))
        Me.Label2.ForeColor = System.Drawing.Color.Blue
        Me.Label2.Location = New System.Drawing.Point(16, 56)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(64, 24)
        Me.Label2.TabIndex = 4
        Me.Label2.Text = "查询类型"
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'Button1
        '
        Me.Button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat
        Me.Button1.ForeColor = System.Drawing.Color.Navy
        Me.Button1.Location = New System.Drawing.Point(384, 24)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(48, 24)
        Me.Button1.TabIndex = 3
        Me.Button1.Text = "查询"
        '
        'GroupBox2
        '
        Me.GroupBox2.Controls.AddRange(New System.Windows.Forms.Control() {Me.DataGrid1})
        Me.GroupBox2.Dock = System.Windows.Forms.DockStyle.Bottom
        Me.GroupBox2.Location = New System.Drawing.Point(3, 116)
        Me.GroupBox2.Name = "GroupBox2"
        Me.GroupBox2.Size = New System.Drawing.Size(434, 264)
        Me.GroupBox2.TabIndex = 2
        Me.GroupBox2.TabStop = False
        Me.GroupBox2.Text = "查询结果"
        '
        'DataGrid1
        '
        Me.DataGrid1.DataMember = ""
        Me.DataGrid1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
        Me.DataGrid1.Location = New System.Drawing.Point(3, 17)
        Me.DataGrid1.Name = "DataGrid1"
        Me.DataGrid1.ReadOnly = True
        Me.DataGrid1.Size = New System.Drawing.Size(428, 244)
        Me.DataGrid1.TabIndex = 0
        '
        'Label1
        '
        Me.Label1.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(192, Byte), CType(192, Byte))
        Me.Label1.ForeColor = System.Drawing.Color.Blue
        Me.Label1.Location = New System.Drawing.Point(16, 88)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(64, 24)
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "查询字段"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'TextBox1
        '
        Me.TextBox1.BackColor = System.Drawing.SystemColors.Info
        Me.TextBox1.Location = New System.Drawing.Point(88, 24)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(280, 21)
        Me.TextBox1.TabIndex = 0
        Me.TextBox1.Text = ""
        '
        'frmSearcher
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(440, 383)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.GroupBox1})
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.Name = "frmSearcher"
        Me.Text = "查询统计管理"
        Me.GroupBox1.ResumeLayout(False)
        Me.GroupBox2.ResumeLayout(False)
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region
    Public tbName As String
    Public Sheet As String
    Public sqlstr As String
    Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
        Select Case Me.ComboBox1.SelectedIndex
            Case 0
                tbName = "LendInfo"
            Case 1
                tbName = "StudentInfo"
            Case 2
                tbName = "BookInfo"
        End Select
    End Sub

    Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged
        Select Case Me.ComboBox2.SelectedIndex
            Case 0
                Sheet = "ISBN"
            Case 1
                Sheet = "ID"
        End Select
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
        If Trim(Me.TextBox1.Text) <> "" Then
            sqlstr = "SELECT * FROM " & tbName & " WHERE " & Sheet & "=  '" & _
            Trim(Me.TextBox1.Text) & "'"
            Dim ds As New DataSet()
            ds.Clear()
            ds = GetDataFromDB(sqlstr)
            If Not ds Is Nothing Then
                Me.DataGrid1.DataSource = ds.Tables(0).DefaultView
            End If
        End If
    End Sub
End Class