frmaddtime.vb

vb。net 2003数据库设计整套源代码

Public Class FrmAddTime
    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 TxtTime As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TxtIDOrder As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents BtCancel As System.Windows.Forms.Button
    Friend WithEvents BtOK As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.TxtTime = New System.Windows.Forms.TextBox()
        Me.Label4 = New System.Windows.Forms.Label()
        Me.TxtIDOrder = New System.Windows.Forms.TextBox()
        Me.Label3 = New System.Windows.Forms.Label()
        Me.BtCancel = New System.Windows.Forms.Button()
        Me.BtOK = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'TxtTime
        '
        Me.TxtTime.Location = New System.Drawing.Point(136, 88)
        Me.TxtTime.Name = "TxtTime"
        Me.TxtTime.Size = New System.Drawing.Size(120, 21)
        Me.TxtTime.TabIndex = 31
        Me.TxtTime.Text = "0"
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(64, 88)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(48, 24)
        Me.Label4.TabIndex = 30
        Me.Label4.Text = "机时："
        '
        'TxtIDOrder
        '
        Me.TxtIDOrder.Location = New System.Drawing.Point(136, 40)
        Me.TxtIDOrder.Name = "TxtIDOrder"
        Me.TxtIDOrder.Size = New System.Drawing.Size(120, 21)
        Me.TxtIDOrder.TabIndex = 29
        Me.TxtIDOrder.Text = ""
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(64, 40)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(48, 32)
        Me.Label3.TabIndex = 28
        Me.Label3.Text = "编号："
        '
        'BtCancel
        '
        Me.BtCancel.Location = New System.Drawing.Point(176, 144)
        Me.BtCancel.Name = "BtCancel"
        Me.BtCancel.Size = New System.Drawing.Size(80, 32)
        Me.BtCancel.TabIndex = 23
        Me.BtCancel.Text = "取消"
        '
        'BtOK
        '
        Me.BtOK.Location = New System.Drawing.Point(64, 144)
        Me.BtOK.Name = "BtOK"
        Me.BtOK.Size = New System.Drawing.Size(72, 32)
        Me.BtOK.TabIndex = 22
        Me.BtOK.Text = "确定"
        '
        'FrmAddTime
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(296, 206)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.TxtTime, Me.Label4, Me.TxtIDOrder, Me.Label3, Me.BtCancel, Me.BtOK})
        Me.MaximizeBox = False
        Me.Name = "FrmAddTime"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent
        Me.Text = "用户续机时"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub BtCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtCancel.Click
        Me.Close()
    End Sub

    Private Sub BtOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtOK.Click
        If Trim(TxtIDOrder.Text) = "" Then
            MsgBox("输入的编号不能为空！", MsgBoxStyle.Exclamation, Me.Text)
            Exit Sub
        End If
        If Not IsNumeric(TxtTime.Text) Then
            MsgBox("输入的机时只能为数字！", MsgBoxStyle.Exclamation, Me.Text)
            Exit Sub
        End If
        If UserExist() <> True Then
            '判断用户是否存在
            MsgBox("不存在该用户！", MsgBoxStyle.Exclamation, Me.Text)
            TxtIDOrder.Text = ""
            TxtTime.Text = "0"
            TxtIDOrder.Focus()
            Exit Sub
        End If
        Dim currentTime As Double
        currentTime = RemainTime() + Val(TxtTime.Text)
        Dim oleconn As New OleDb.OleDbConnection(CONN)
        Dim cmd As New OleDb.OleDbCommand()
        Dim SQLString As String
        SQLString = "UPDATE tbUser SET RemainTime='" & currentTime & "' WHERE IDOrder='" & Trim(TxtIDOrder.Text) & "'"
        CommandRecord(SQLString) '执行SQL语句，更新记录
        AddLog(ManagerName & "为" & TxtIDOrder.Text & "添加了机时" & TxtTime.Text)
        '写日志
        MsgBox("恭喜你，续机时成功！" & ControlChars.CrLf & "当前可用机时为：" & CStr(currentTime), , Me.Text)
        Me.Close()
    End Sub
    Function RemainTime() As Double
        Dim SQLString As String
        SQLString = "SELECT RemainTime FROM tbUser WHERE IDOrder='" & Trim(TxtIDOrder.Text) & "' "
        Dim ObjectdsDataSet As New DataSet()
        Dim oleconn As New OleDb.OleDbConnection(CONN)
        Dim adapter As New OleDb.OleDbDataAdapter()
        adapter.TableMappings.Add("Table", "User")
        Dim cmd As OleDb.OleDbCommand = New OleDb.OleDbCommand(SQLString, oleconn)
        cmd.CommandType = CommandType.Text
        adapter.SelectCommand = cmd
        If oleconn.State <> ConnectionState.Open Then
            oleconn.Open()
        End If
        cmd.ExecuteNonQuery()
        If oleconn.State <> ConnectionState.Closed Then
            oleconn.Close()
        End If
        adapter.Fill(ObjectdsDataSet)
        Return ObjectdsDataSet.Tables("User").Rows(0)("RemainTime")
    End Function
    Function UserExist() As Boolean
        Dim SQLString As String
        SQLString = "SELECT * FROM tbUser WHERE IDOrder='" & Trim(TxtIDOrder.Text) & "' "
        Dim ObjectdsDataSet As New DataSet()
        Dim oleconn As New OleDb.OleDbConnection(CONN)
        Dim adapter As New OleDb.OleDbDataAdapter()
        adapter.TableMappings.Add("Table", "User")
        Dim cmd As OleDb.OleDbCommand = New OleDb.OleDbCommand(SQLString, oleconn)
        cmd.CommandType = CommandType.Text
        adapter.SelectCommand = cmd
        If oleconn.State <> ConnectionState.Open Then
            oleconn.Open()
        End If
        cmd.ExecuteNonQuery()
        If oleconn.State <> ConnectionState.Closed Then
            oleconn.Close()
        End If
        adapter.Fill(ObjectdsDataSet)
        If ObjectdsDataSet.Tables("User").Rows.Count <> 0 Then
            Return True
        Else
            Return False
        End If
    End Function
End Class