frmuserinsert.vb

教务管理系统：学生成绩管理

Imports System.Data.SqlClient
Imports System.IO

Public Class FrmUserInsert
    Inherits System.Windows.Forms.Form
    Dim Usertype As Int16
    Dim UserPwd As String
#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 TxtUserID As System.Windows.Forms.TextBox
    Friend WithEvents LblUserID As System.Windows.Forms.Label
    Friend WithEvents LblUserPwd As System.Windows.Forms.Label
    Friend WithEvents TxtUserPwd As System.Windows.Forms.TextBox
    Friend WithEvents LblUserType As System.Windows.Forms.Label
    Friend WithEvents BtnOK As System.Windows.Forms.Button
    Friend WithEvents CmbUserType As System.Windows.Forms.ComboBox
    Friend WithEvents BtnCancel As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.TxtUserID = New System.Windows.Forms.TextBox
        Me.LblUserID = New System.Windows.Forms.Label
        Me.LblUserPwd = New System.Windows.Forms.Label
        Me.TxtUserPwd = New System.Windows.Forms.TextBox
        Me.LblUserType = New System.Windows.Forms.Label
        Me.BtnOK = New System.Windows.Forms.Button
        Me.BtnCancel = New System.Windows.Forms.Button
        Me.CmbUserType = New System.Windows.Forms.ComboBox
        Me.SuspendLayout()
        '
        'TxtUserID
        '
        Me.TxtUserID.Location = New System.Drawing.Point(96, 8)
        Me.TxtUserID.Name = "TxtUserID"
        Me.TxtUserID.Size = New System.Drawing.Size(96, 21)
        Me.TxtUserID.TabIndex = 0
        Me.TxtUserID.Text = ""
        '
        'LblUserID
        '
        Me.LblUserID.Location = New System.Drawing.Point(16, 16)
        Me.LblUserID.Name = "LblUserID"
        Me.LblUserID.Size = New System.Drawing.Size(72, 16)
        Me.LblUserID.TabIndex = 1
        Me.LblUserID.Text = "用户名："
        Me.LblUserID.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'LblUserPwd
        '
        Me.LblUserPwd.Location = New System.Drawing.Point(16, 48)
        Me.LblUserPwd.Name = "LblUserPwd"
        Me.LblUserPwd.Size = New System.Drawing.Size(72, 16)
        Me.LblUserPwd.TabIndex = 3
        Me.LblUserPwd.Text = "密码："
        Me.LblUserPwd.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'TxtUserPwd
        '
        Me.TxtUserPwd.Location = New System.Drawing.Point(96, 40)
        Me.TxtUserPwd.Name = "TxtUserPwd"
        Me.TxtUserPwd.Size = New System.Drawing.Size(96, 21)
        Me.TxtUserPwd.TabIndex = 2
        Me.TxtUserPwd.Text = ""
        '
        'LblUserType
        '
        Me.LblUserType.Location = New System.Drawing.Point(16, 72)
        Me.LblUserType.Name = "LblUserType"
        Me.LblUserType.Size = New System.Drawing.Size(72, 16)
        Me.LblUserType.TabIndex = 5
        Me.LblUserType.Text = "用户权限："
        Me.LblUserType.TextAlign = System.Drawing.ContentAlignment.MiddleRight
        '
        'BtnOK
        '
        Me.BtnOK.DialogResult = System.Windows.Forms.DialogResult.OK
        Me.BtnOK.Location = New System.Drawing.Point(24, 112)
        Me.BtnOK.Name = "BtnOK"
        Me.BtnOK.Size = New System.Drawing.Size(80, 24)
        Me.BtnOK.TabIndex = 6
        Me.BtnOK.Text = "确定"
        '
        'BtnCancel
        '
        Me.BtnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.BtnCancel.Location = New System.Drawing.Point(120, 112)
        Me.BtnCancel.Name = "BtnCancel"
        Me.BtnCancel.Size = New System.Drawing.Size(80, 24)
        Me.BtnCancel.TabIndex = 7
        Me.BtnCancel.Text = "取消"
        '
        'CmbUserType
        '
        Me.CmbUserType.Location = New System.Drawing.Point(96, 72)
        Me.CmbUserType.Name = "CmbUserType"
        Me.CmbUserType.Size = New System.Drawing.Size(104, 20)
        Me.CmbUserType.TabIndex = 8
        '
        'FrmUserInsert
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(232, 149)
        Me.Controls.Add(Me.CmbUserType)
        Me.Controls.Add(Me.BtnCancel)
        Me.Controls.Add(Me.BtnOK)
        Me.Controls.Add(Me.LblUserType)
        Me.Controls.Add(Me.LblUserPwd)
        Me.Controls.Add(Me.TxtUserPwd)
        Me.Controls.Add(Me.LblUserID)
        Me.Controls.Add(Me.TxtUserID)
        Me.Name = "FrmUserInsert"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub BtnOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnOK.Click
        UserFlag = False
        If Me.TxtUserID.Text.Trim() = String.Empty Then
            MessageBox.Show("用户名不能为空")
            Me.TxtUserID.Focus()
        ElseIf Me.TxtUserPwd.Text.Trim() = String.Empty Then
            MessageBox.Show("密码不能为空")
            Me.TxtUserPwd.Focus()
        ElseIf Me.CmbUserType.Text.Trim() = String.Empty Then
            MessageBox.Show("权限级别不能为空")
            Me.CmbUserType.Focus()
        ElseIf Me.Text = "用户添加" And JudgeKeyExist("USERINFO", "USERID", TxtUserID.Text.Trim) Then
            MessageBox.Show("该用户名已存在")
            Me.TxtUserID.Text = ""
            Me.TxtUserID.Focus()
        ElseIf Me.Text = "用户修改" And Not JudgeKeyExist("USERINFO", "USERID", TxtUserID.Text.Trim) Then
            MessageBox.Show("要修改的纪录不存在")
            Me.TxtUserID.Text = ""
            Me.TxtUserID.Focus()
        Else
            User = TxtUserID.Text.Trim
            UserPwd = TxtUserPwd.Text.Trim
            Usertype = CmbUserType.SelectedIndex
            If Me.Text = "用户添加" Then
                InsertData()
            ElseIf Me.Text = "用户修改" Then
                UpdateData()
            End If
        End If

    End Sub


    Private Sub FrmUserInsert_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        CmbUserType.Items.Add("系统管理员")
        CmbUserType.Items.Add("信息管理员")
        CmbUserType.Items.Add("信息使用员")
        If User = "" Then
            Usertype = -1
            UserPwd = ""
        Else
            Try
                Dim sql As String = "select userid ,userpwd ,usertype  from userinfo where userid='" + User + "'"
                Dim dt As DataTable = GetDataTable(sql)
                User = dt.Rows(0)("userid")
                UserPwd = dt.Rows(0)("userpwd")
                Usertype = dt.Rows(0)("usertype")
            Catch ex As Exception
                WriteErr(ex)
            End Try
        End If


        If Usertype = -1 Then
            CmbUserType.Text = ""
        Else
            CmbUserType.SelectedIndex = Usertype
        End If
        TxtUserID.Text = User
        TxtUserPwd.Text = UserPwd


    End Sub

    Private Sub InsertData()


        Dim value As String = "'" + User + "','" + UserPwd + "'," + Usertype.ToString

        Dim sql As String = "INSERT INTO USERINFO (USERID, USERPWD,USERTYPE) VALUES(" + value + ")"

        Dim sqlCmd As New SqlCommand
        sqlCmd.Connection = SqlCon
        sqlCmd.CommandText = sql

        Try
            SqlCon.Open()
            sqlCmd.ExecuteNonQuery()
            MessageBox.Show("添加记录成功")
            UserFlag = True
        Catch ex As Exception
            MessageBox.Show("添加记录失败")
            WriteErr(ex)
        Finally
            SqlCon.Close()

        End Try
    End Sub

    Private Sub UpdateData()

        Dim sql As String = "UPDATE USERINFO SET USERPWD='" + UserPwd + "',USERTYPE=" + Usertype.ToString + " WHERE USERID= '" + User + "'"

        Dim sqlCmd As New SqlCommand
        sqlCmd.Connection = SqlCon
        sqlCmd.CommandText = sql

        Try
            SqlCon.Open()
            sqlCmd.ExecuteNonQuery()
            MessageBox.Show("修改记录成功")
            UserFlag = True
        Catch ex As Exception
            MessageBox.Show("修改记录失败")
            WriteErr(ex)
        Finally
            SqlCon.Close()

        End Try
    End Sub

    Private Sub FrmUserInsert_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
        If Not UserFlag Then
            e.Cancel = True
        Else
            e.Cancel = False
        End If
        UserFlag = True
    End Sub

End Class