college.vb

档案管理系统

Public Class frmCollege
    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 Label1 As System.Windows.Forms.Label
    Friend WithEvents btnAdd As System.Windows.Forms.Button
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents txtDean As System.Windows.Forms.TextBox
    Friend WithEvents txtSecretary As System.Windows.Forms.TextBox
    Friend WithEvents btnModify As System.Windows.Forms.Button
    Friend WithEvents btnDelete As System.Windows.Forms.Button
    Friend WithEvents btnConfirm As System.Windows.Forms.Button
    Friend WithEvents btnCancel As System.Windows.Forms.Button
    Friend WithEvents stbCollege As System.Windows.Forms.StatusBar
    Friend WithEvents cmbName As System.Windows.Forms.ComboBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.btnAdd = New System.Windows.Forms.Button
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.txtDean = New System.Windows.Forms.TextBox
        Me.txtSecretary = New System.Windows.Forms.TextBox
        Me.btnModify = New System.Windows.Forms.Button
        Me.btnDelete = New System.Windows.Forms.Button
        Me.btnConfirm = New System.Windows.Forms.Button
        Me.btnCancel = New System.Windows.Forms.Button
        Me.stbCollege = New System.Windows.Forms.StatusBar
        Me.cmbName = New System.Windows.Forms.ComboBox
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(24, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(64, 23)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "学院名称"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'btnAdd
        '
        Me.btnAdd.Location = New System.Drawing.Point(24, 136)
        Me.btnAdd.Name = "btnAdd"
        Me.btnAdd.Size = New System.Drawing.Size(40, 23)
        Me.btnAdd.TabIndex = 2
        Me.btnAdd.Text = "增加"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(24, 64)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(64, 23)
        Me.Label2.TabIndex = 0
        Me.Label2.Text = "院长"
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(24, 96)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(64, 23)
        Me.Label3.TabIndex = 0
        Me.Label3.Text = "教务秘书"
        Me.Label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'txtDean
        '
        Me.txtDean.Location = New System.Drawing.Point(96, 60)
        Me.txtDean.Name = "txtDean"
        Me.txtDean.Size = New System.Drawing.Size(136, 21)
        Me.txtDean.TabIndex = 3
        Me.txtDean.Text = ""
        '
        'txtSecretary
        '
        Me.txtSecretary.Location = New System.Drawing.Point(96, 96)
        Me.txtSecretary.Name = "txtSecretary"
        Me.txtSecretary.Size = New System.Drawing.Size(136, 21)
        Me.txtSecretary.TabIndex = 3
        Me.txtSecretary.Text = ""
        '
        'btnModify
        '
        Me.btnModify.Location = New System.Drawing.Point(66, 136)
        Me.btnModify.Name = "btnModify"
        Me.btnModify.Size = New System.Drawing.Size(40, 23)
        Me.btnModify.TabIndex = 2
        Me.btnModify.Text = "修改"
        '
        'btnDelete
        '
        Me.btnDelete.Location = New System.Drawing.Point(108, 136)
        Me.btnDelete.Name = "btnDelete"
        Me.btnDelete.Size = New System.Drawing.Size(40, 23)
        Me.btnDelete.TabIndex = 2
        Me.btnDelete.Text = "删除"
        '
        'btnConfirm
        '
        Me.btnConfirm.Location = New System.Drawing.Point(150, 136)
        Me.btnConfirm.Name = "btnConfirm"
        Me.btnConfirm.Size = New System.Drawing.Size(40, 23)
        Me.btnConfirm.TabIndex = 2
        Me.btnConfirm.Text = "确定"
        '
        'btnCancel
        '
        Me.btnCancel.Location = New System.Drawing.Point(192, 136)
        Me.btnCancel.Name = "btnCancel"
        Me.btnCancel.Size = New System.Drawing.Size(40, 23)
        Me.btnCancel.TabIndex = 2
        Me.btnCancel.Text = "取消"
        '
        'stbCollege
        '
        Me.stbCollege.Location = New System.Drawing.Point(0, 181)
        Me.stbCollege.Name = "stbCollege"
        Me.stbCollege.Size = New System.Drawing.Size(264, 16)
        Me.stbCollege.TabIndex = 4
        '
        'cmbName
        '
        Me.cmbName.Location = New System.Drawing.Point(96, 24)
        Me.cmbName.Name = "cmbName"
        Me.cmbName.Size = New System.Drawing.Size(136, 20)
        Me.cmbName.TabIndex = 5
        '
        'frmCollege
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(264, 197)
        Me.Controls.Add(Me.cmbName)
        Me.Controls.Add(Me.stbCollege)
        Me.Controls.Add(Me.txtDean)
        Me.Controls.Add(Me.btnAdd)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.txtSecretary)
        Me.Controls.Add(Me.btnModify)
        Me.Controls.Add(Me.btnDelete)
        Me.Controls.Add(Me.btnConfirm)
        Me.Controls.Add(Me.btnCancel)
        Me.MaximizeBox = False
        Me.Name = "frmCollege"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "学院设置"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private myDataset As New DataSet
    Private index As Integer = -1

    Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        Dim succ As Boolean = True

        If cmbName.Text = "" Then
            stbCollege.Text = "学院名称不能为空"
        Else
            Try
                Dim dr As DataRow = myDataset.Tables(0).NewRow
                dr.Item("学院名称") = cmbName.Text
                dr.Item("院长") = txtDean.Text
                dr.Item("教务秘书") = txtSecretary.Text
                myDataset.Tables(0).Rows.Add(dr)
                cmbName.Items.Add(cmbName.Text)
            Catch ex As Exception
                succ = False
                DisplayError(ex)
            End Try

            If succ Then
                stbCollege.Text = "增加成功"
            Else
                stbCollege.Text = "增加失败"
            End If
        End If
    End Sub

    Private Sub frmCollege_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim i As Integer

        If OleConn.SelectQuery("select * from 学院信息", myDataset) Then
            If myDataset.Tables.Count > 0 Then
                For i = 0 To myDataset.Tables(0).Rows.Count - 1
                    cmbName.Items.Add(myDataset.Tables(0).Rows(i).Item("学院名称"))
                Next
                stbCollege.Text = "就绪"
            Else
                stbCollege.Text = "查询学院信息失败"
            End If
        Else
            stbCollege.Text = "查询学院信息失败"
        End If
    End Sub

    Private Sub btnModify_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnModify.Click
        Dim succ As Boolean = True

        If cmbName.Text <> "" Then
            If index >= 0 Then
                Try
                    Dim dr As DataRow()
                    Dim str As String

                    str = "学院名称='" & cmbName.Items.Item(index) & "'"
                    dr = myDataset.Tables(0).Select(str)
                    dr(0).BeginEdit()
                    dr(0).Item("学院名称") = cmbName.Text
                    dr(0).Item("院长") = txtDean.Text
                    dr(0).Item("教务秘书") = txtSecretary.Text
                    dr(0).EndEdit()
                    cmbName.Items.Item(index) = cmbName.Text
                Catch ex As Exception
                    succ = False
                    DisplayError(ex)
                End Try

                If succ Then
                    stbCollege.Text = "修改成功"
                Else
                    stbCollege.Text = "修改失败"
                End If
            Else
                stbCollege.Text = "请先选择要修改的记录"
            End If
        Else
            stbCollege.Text = "学院名称不能为空"
        End If
    End Sub

    Private Sub cmbName_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbName.SelectedIndexChanged
        index = cmbName.SelectedIndex

        Dim dr As DataRow()
        Dim str As String

        str = "学院名称='" & cmbName.SelectedItem & "'"
        dr = myDataset.Tables(0).Select(str)
        txtDean.Text = Trim(dr(0).Item("院长"))
        txtSecretary.Text = Trim(dr(0).Item("教务秘书"))
    End Sub

    Private Sub btnDelete_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDelete.Click
        Dim succ As Boolean = True

        If index >= 0 Then
            Try
                Dim dr As DataRow()
                Dim str As String

                str = "学院名称='" & cmbName.Items.Item(index) & "'"
                dr = myDataset.Tables(0).Select(str)
                dr(0).Delete()
                cmbName.Items.RemoveAt(index)
                txtDean.Text = ""
                txtSecretary.Text = ""
            Catch ex As Exception
                succ = False
                DisplayError(ex)
            End Try

            If succ Then
                stbCollege.Text = "删除成功"
            Else
                stbCollege.Text = "删除失败"
            End If
        Else
            stbCollege.Text = "请先选择要修改的记录"
        End If
    End Sub

    Private Sub btnConfirm_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnConfirm.Click
        Dim succ As Boolean = True

        Try
            OleConn.UpDate(myDataset.Tables(0))
            myDataset.AcceptChanges()
        Catch ex As Exception
            succ = False
            DisplayError(ex)
        End Try

        If succ Then
            stbCollege.Text = "更新数据库成功"
        Else
            stbCollege.Text = "更新数据库失败"
        End If
    End Sub

    Private Sub btnCancel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnCancel.Click
        Dim i As Integer

        myDataset.RejectChanges()
        cmbName.Items.Clear()
        For i = 0 To myDataset.Tables(0).Rows.Count - 1
            cmbName.Items.Add(myDataset.Tables(0).Rows(i).Item("学院名称"))
        Next

        stbCollege.Text = "你已经取消了所有的改动"
    End Sub
End Class