frmstuduty.vb

师生情况管理系统

Imports System
Imports System.Data
Imports System.Data.SqlClient

Public Class FrmStuDuty
    Inherits System.Windows.Forms.Form

    Private sqlConn As SqlConnection
    Private sqlComm As SqlCommand
    Private daDate As SqlDataAdapter
    Private dsData As DataSet
    Private flag As Int32                   '标明添加还是修改还是能够查询
    Private strSelect As String             '查询框是否有值
    Private tableNum As Int32               '查询框没值则为0，有值则为1

#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 txtID As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents btnExit As System.Windows.Forms.Button
    Friend WithEvents btnSave As System.Windows.Forms.Button
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents btnCancel As System.Windows.Forms.Button
    Friend WithEvents btnDelete As System.Windows.Forms.Button
    Friend WithEvents btnUpdate As System.Windows.Forms.Button
    Friend WithEvents btnAdd As System.Windows.Forms.Button
    Friend WithEvents dgDate As System.Windows.Forms.DataGrid
    Friend WithEvents txtName As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.txtID = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.btnExit = New System.Windows.Forms.Button
        Me.btnSave = New System.Windows.Forms.Button
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.btnCancel = New System.Windows.Forms.Button
        Me.btnDelete = New System.Windows.Forms.Button
        Me.btnUpdate = New System.Windows.Forms.Button
        Me.btnAdd = New System.Windows.Forms.Button
        Me.dgDate = New System.Windows.Forms.DataGrid
        Me.txtName = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        CType(Me.dgDate, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'txtID
        '
        Me.txtID.Location = New System.Drawing.Point(112, 46)
        Me.txtID.Name = "txtID"
        Me.txtID.Size = New System.Drawing.Size(92, 21)
        Me.txtID.TabIndex = 44
        Me.txtID.Text = ""
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(28, 54)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(86, 16)
        Me.Label4.TabIndex = 43
        Me.Label4.Text = "学生职务编号:"
        '
        'btnExit
        '
        Me.btnExit.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.btnExit.Location = New System.Drawing.Point(344, 264)
        Me.btnExit.Name = "btnExit"
        Me.btnExit.Size = New System.Drawing.Size(56, 24)
        Me.btnExit.TabIndex = 42
        Me.btnExit.Text = "退出"
        '
        'btnSave
        '
        Me.btnSave.Location = New System.Drawing.Point(344, 232)
        Me.btnSave.Name = "btnSave"
        Me.btnSave.Size = New System.Drawing.Size(56, 24)
        Me.btnSave.TabIndex = 41
        Me.btnSave.Text = "保存"
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.btnCancel)
        Me.GroupBox1.Controls.Add(Me.btnDelete)
        Me.GroupBox1.Controls.Add(Me.btnUpdate)
        Me.GroupBox1.Controls.Add(Me.btnAdd)
        Me.GroupBox1.Location = New System.Drawing.Point(328, 80)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(78, 148)
        Me.GroupBox1.TabIndex = 40
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "GroupBox1"
        '
        'btnCancel
        '
        Me.btnCancel.Location = New System.Drawing.Point(14, 114)
        Me.btnCancel.Name = "btnCancel"
        Me.btnCancel.Size = New System.Drawing.Size(56, 24)
        Me.btnCancel.TabIndex = 3
        Me.btnCancel.Text = "取消"
        '
        'btnDelete
        '
        Me.btnDelete.Location = New System.Drawing.Point(14, 84)
        Me.btnDelete.Name = "btnDelete"
        Me.btnDelete.Size = New System.Drawing.Size(56, 24)
        Me.btnDelete.TabIndex = 2
        Me.btnDelete.Text = "删除"
        '
        'btnUpdate
        '
        Me.btnUpdate.Location = New System.Drawing.Point(14, 54)
        Me.btnUpdate.Name = "btnUpdate"
        Me.btnUpdate.Size = New System.Drawing.Size(56, 24)
        Me.btnUpdate.TabIndex = 1
        Me.btnUpdate.Text = "更改"
        '
        'btnAdd
        '
        Me.btnAdd.Location = New System.Drawing.Point(14, 24)
        Me.btnAdd.Name = "btnAdd"
        Me.btnAdd.Size = New System.Drawing.Size(56, 24)
        Me.btnAdd.TabIndex = 0
        Me.btnAdd.Text = "添加"
        '
        'dgDate
        '
        Me.dgDate.DataMember = ""
        Me.dgDate.HeaderForeColor = System.Drawing.SystemColors.ControlText
        Me.dgDate.Location = New System.Drawing.Point(24, 85)
        Me.dgDate.Name = "dgDate"
        Me.dgDate.Size = New System.Drawing.Size(296, 203)
        Me.dgDate.TabIndex = 39
        '
        'txtName
        '
        Me.txtName.Location = New System.Drawing.Point(308, 46)
        Me.txtName.Name = "txtName"
        Me.txtName.Size = New System.Drawing.Size(92, 21)
        Me.txtName.TabIndex = 38
        Me.txtName.Text = ""
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(212, 54)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(88, 16)
        Me.Label3.TabIndex = 37
        Me.Label3.Text = "学生职务名称:"
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("黑体", 15.75!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.Location = New System.Drawing.Point(118, 4)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(206, 30)
        Me.Label1.TabIndex = 45
        Me.Label1.Text = "学生职务管理"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        '
        'FrmStuDuty
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(424, 301)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.txtID)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.btnExit)
        Me.Controls.Add(Me.btnSave)
        Me.Controls.Add(Me.GroupBox1)
        Me.Controls.Add(Me.dgDate)
        Me.Controls.Add(Me.txtName)
        Me.Controls.Add(Me.Label3)
        Me.Name = "FrmStuDuty"
        Me.Text = "FrmStuDuty"
        Me.GroupBox1.ResumeLayout(False)
        CType(Me.dgDate, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub FrmStuDuty_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        sqlConn = New SqlConnection(FrmMain.DBCONN.DataConStr)
        sqlComm = New SqlCommand("select * from sDuty", sqlConn)
        daDate = New SqlDataAdapter("select SDID 职务编号, SDname 职务名称 from SDuty", sqlConn)
        dsData = New DataSet
        sqlConn.Open()
        daDate.Fill(dsData, "Table")
        dgDate.SetDataBinding(dsData, "Table")

        txtID.Enabled = True
        txtName.Enabled = False

        flag = 3                            'flag为3，则是可以查询
    End Sub

    Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        flag = 1            '添加操作

        txtID.Text = ""
        txtName.Text = ""

        txtID.Enabled = True
        txtName.Enabled = True
        btnAdd.Enabled = False
        btnUpdate.Enabled = False
        btnDelete.Enabled = False
        btnCancel.Enabled = True
        btnSave.Enabled = True
    End Sub

    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        Me.sqlConn.Close()
        Me.Close()
    End Sub

    Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
        If dgDate.CurrentCell.RowNumber < 0 Then
            MsgBox("你还没有选中信息")
            Exit Sub
        End If

        flag = 2
        txtID.Text = ""
        txtName.Text = ""

        txtID.Enabled = False
        txtName.Enabled = True
        btnAdd.Enabled = False
        btnUpdate.Enabled = False
        btnDelete.Enabled = False
        btnCancel.Enabled = True
        btnSave.Enabled = True
    End Sub

    Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
        If dgDate.CurrentCell.RowNumber < 0 Then
            MsgBox("你还没有选中信息")
            Exit Sub
        End If

        If MsgBox("你真的要删除该信息吗？", MsgBoxStyle.OKCancel, "删除") = MsgBoxResult.OK Then
            sqlComm.CommandText = "delete Sduty where SDname = '" & txtID.Text & "'"
            daDate.DeleteCommand = sqlComm

            Try
                sqlComm.ExecuteNonQuery()
                MsgBox("删除成功")
                dsData.Tables(0).Rows(dgDate.CurrentCell.RowNumber).Delete()

                txtID.Enabled = False
                txtName.Enabled = False
                btnAdd.Enabled = False
                btnUpdate.Enabled = False
                btnDelete.Enabled = False
                btnCancel.Enabled = True
                btnSave.Enabled = False
            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
        End If
    End Sub

    Private Sub dgDate_CurrentCellChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles dgDate.CurrentCellChanged
        txtID.Text = dsData.Tables(0).Rows(dgDate.CurrentCell.RowNumber).Item(0)
        txtName.Text = dsData.Tables(0).Rows(dgDate.CurrentCell.RowNumber).Item(1)

    End Sub

    Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click
        txtID.Enabled = True
        txtName.Enabled = False
        btnAdd.Enabled = True
        btnUpdate.Enabled = True
        btnDelete.Enabled = True
        btnCancel.Enabled = False
        btnSave.Enabled = False

        flag = 3

    End Sub

    Private Function check() As Boolean
        If txtID.Text = "" Then
            MsgBox("职务编号不能为空")
            Return False
        End If
        If txtName.Text = "" Then
            MsgBox("职务名称不能为空")
            Return False
        End If
        Return True
    End Function

    Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        If Me.check() = False Then
            Exit Sub
        End If

        If flag = 1 Then
            Dim objRow As DataRow
            objRow = dsData.Tables(0).NewRow()
            objRow(0) = txtID.Text
            objRow(1) = txtName.Text
            dsData.Tables(0).Rows.Add(objRow)

            sqlComm.CommandText = "insert into Sduty values ('" & txtID.Text & "', '" & txtName.Text & "')"
            daDate.InsertCommand = sqlComm
            Try
                sqlComm.ExecuteNonQuery()
                MsgBox("添加成功")

                txtID.Enabled = False
                txtName.Enabled = False
                btnAdd.Enabled = False
                btnUpdate.Enabled = False
                btnDelete.Enabled = False
                btnCancel.Enabled = True
                btnSave.Enabled = False
            Catch ex As Exception
                MsgBox(ex.Message)
                dsData.Tables(0).Rows(dsData.Tables(0).Rows.Count - 1).Delete()
            End Try
        End If

        If flag = 2 Then
            dsData.Tables(0).Rows(dgDate.CurrentCell.RowNumber).Item(0) = txtID.Text
            dsData.Tables(0).Rows(dgDate.CurrentCell.RowNumber).Item(1) = txtName.Text

            sqlComm.CommandText = "update Sduty set SDname = '" & txtName.Text & "' where SDID = '" & txtID.Text & "'"
            daDate.UpdateCommand = sqlComm
            Try
                sqlComm.ExecuteNonQuery()
                MsgBox("更新成功")

                txtID.Enabled = False
                txtName.Enabled = False
                btnAdd.Enabled = False
                btnUpdate.Enabled = False
                btnDelete.Enabled = False
                btnCancel.Enabled = True
                btnSave.Enabled = False
            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
        End If
    End Sub

    Private Sub txtID_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles txtID.KeyUp
        If flag = 3 Then
            strSelect += txtID.Text
            If strSelect = "" Then
                tableNum = 0
                dsData.Tables(0).Clear()
                daDate.Fill(dsData, "Table")
                dgDate.SetDataBinding(dsData, "Table")
            Else
                tableNum = 1
                sqlComm.CommandText = "select SDID 职务编号, SDname 职务名称 from SDuty where SDID like '" & txtID.Text & "%'"
                daDate.SelectCommand = sqlComm
                If dsData.Tables.Count > 1 Then
                    dsData.Tables(1).Clear()
                End If
                daDate.Fill(dsData, "TableSelect")
                dgDate.SetDataBinding(dsData, "TableSelect")
            End If
        End If
    End Sub
End Class