客户信息查询.vb

这是个用VB编写的机票销售与查询管理系统

Imports System.Data
Imports System.Data.SqlClient
Public Class 客户信息查询
    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 ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents ComboBox2 As System.Windows.Forms.ComboBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents RadioButton1 As System.Windows.Forms.RadioButton
    Friend WithEvents RadioButton2 As System.Windows.Forms.RadioButton
    Friend WithEvents Button3 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.ComboBox2 = New System.Windows.Forms.ComboBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.RadioButton1 = New System.Windows.Forms.RadioButton
        Me.RadioButton2 = New System.Windows.Forms.RadioButton
        Me.Button3 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'ComboBox1
        '
        Me.ComboBox1.Location = New System.Drawing.Point(264, 40)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(121, 20)
        Me.ComboBox1.TabIndex = 2
        '
        'ComboBox2
        '
        Me.ComboBox2.Location = New System.Drawing.Point(264, 112)
        Me.ComboBox2.Name = "ComboBox2"
        Me.ComboBox2.Size = New System.Drawing.Size(121, 20)
        Me.ComboBox2.TabIndex = 3
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(32, 184)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(120, 40)
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "确定(&o)"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(176, 184)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(120, 40)
        Me.Button2.TabIndex = 5
        Me.Button2.Text = "取消(&x)"
        '
        'RadioButton1
        '
        Me.RadioButton1.Checked = True
        Me.RadioButton1.Location = New System.Drawing.Point(112, 40)
        Me.RadioButton1.Name = "RadioButton1"
        Me.RadioButton1.TabIndex = 6
        Me.RadioButton1.TabStop = True
        Me.RadioButton1.Text = "客户姓名"
        '
        'RadioButton2
        '
        Me.RadioButton2.Location = New System.Drawing.Point(112, 115)
        Me.RadioButton2.Name = "RadioButton2"
        Me.RadioButton2.TabIndex = 7
        Me.RadioButton2.Text = "客户类型"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(328, 184)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(120, 40)
        Me.Button3.TabIndex = 8
        Me.Button3.Text = "重新查询 "
        '
        '客户信息查询
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(480, 254)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.RadioButton2)
        Me.Controls.Add(Me.RadioButton1)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.ComboBox2)
        Me.Controls.Add(Me.ComboBox1)
        Me.Name = "客户信息查询"
        Me.Text = "客户信息查询"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub 客户信息查询_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ct = 51
        my_class.init()
        Dim ds As DataSet
        Dim con As String
        Dim count, i As Integer
        con = "select * from customerinfo"
        ds = my_class.query(con)
        count = ds.Tables(0).Rows.Count
        For i = 0 To count - 1
            my_class.dr = ds.Tables(0).Rows(i)
            ComboBox1.Items.Add(Trim(CStr(my_class.dr("customername"))))
            ComboBox2.Items.Add(Trim(CStr(my_class.dr("customertype"))))
        Next
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim ds As DataSet
        Dim con As String
        Dim str As String
        Dim count, i As Integer
        If (RadioButton1.Checked = True And ComboBox1.Text <> "") Then
            ComboBox2.Text = ""
            ComboBox2.Enabled = False
            str = ComboBox1.Text
            con = "select * from customerinfo where customername='" + str + "'"
            ds = my_class.query(con)
            count = ds.Tables(0).Rows.Count
            If (count > 0) Then
                Try
                    my_class.dr = ds.Tables(0).Rows(0)
                Catch ex As Exception
                    MsgBox("选择错误！")
                    Exit Try
                End Try
                ComboBox2.Enabled = True
                ComboBox2.Text = CStr(my_class.dr("customertype"))
                ComboBox2.Items.Clear()
                For i = 0 To count - 1
                    my_class.dr = ds.Tables(0).Rows(i)
                    ComboBox2.Items.Add(Trim(CStr(my_class.dr("customertype"))))
                Next
            Else
                MsgBox("不存在该客户姓名，请重新选择！")
                ComboBox1.SelectAll()
            End If


        ElseIf (RadioButton2.Checked = True And ComboBox2.Text <> "") Then
            str = ComboBox2.Text
            con = "select * from customerinfo where customertype='" + str + "'"
            ds = my_class.query(con)
            count = ds.Tables(0).Rows.Count
            If (count > 0) Then
                Try
                    my_class.dr = ds.Tables(0).Rows(0)
                Catch ex As Exception
                    MsgBox("选择错误！")
                    Exit Try
                End Try
                ComboBox1.Text = ""
                ComboBox1.Items.Clear()
                ComboBox1.Text = Trim(CStr(my_class.dr("customername")))
                For i = 1 To count - 1
                    my_class.dr = ds.Tables(0).Rows(i)
                    ComboBox1.Items.Add(Trim(CStr(my_class.dr("customername"))))
                Next
            Else
                MsgBox("不存在该客户类型，请重新选择！")
                ComboBox2.SelectAll()
            End If
        Else
            MsgBox("选择有错误，请重新选择查询!")

        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()

    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ComboBox1.Text = ""
        ComboBox2.Text = ""
        ComboBox1.Items.Clear()
        ComboBox2.Items.Clear()
        Dim ds As DataSet
        Dim con As String
        Dim count, i As Integer
        con = "select * from customerinfo"
        ds = my_class.query(con)
        count = ds.Tables(0).Rows.Count
        For i = 0 To count - 1
            my_class.dr = ds.Tables(0).Rows(i)
            ComboBox1.Items.Add(Trim(CStr(my_class.dr("customername"))))
            ComboBox2.Items.Add(Trim(CStr(my_class.dr("customertype"))))
        Next
    End Sub

    Private Sub 客户信息查询_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Activated
        Dim mdifrm As New MDIForm1
        mdifrm = Me.MdiParent
        mdifrm.StatusBar1.Panels(0).Text = Me.Text
    End Sub
End Class