frmreturn.vb

visual Basic 数据库开发实例导航

Public Class frmReturn
    Inherits 图书管理系统.frmBase

#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 GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents btnSubmit As System.Windows.Forms.Button
    Friend WithEvents Label4 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.btnSubmit = New System.Windows.Forms.Button
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Anchor = CType(((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.GroupBox1.Controls.Add(Me.Label4)
        Me.GroupBox1.Controls.Add(Me.btnSubmit)
        Me.GroupBox1.Location = New System.Drawing.Point(0, 152)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(608, 160)
        Me.GroupBox1.TabIndex = 4
        Me.GroupBox1.TabStop = False
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(232, 39)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(264, 104)
        Me.Label4.TabIndex = 1
        Me.Label4.Text = "说明：这里是 图书借阅、图书信息、读者信息、三张表关联查询的结果，只显示状态为""未还""的记录，选择相应的记录，单击【归还】按钮，先判断选择的记录是否已过期，如果过" & _
        "期提示输入罚款金额，然后调用""sf_图书归还""存储过程，参数是选择记录的借阅编号和超期罚款金额"
        '
        'btnSubmit
        '
        Me.btnSubmit.Location = New System.Drawing.Point(104, 74)
        Me.btnSubmit.Name = "btnSubmit"
        Me.btnSubmit.Size = New System.Drawing.Size(104, 24)
        Me.btnSubmit.TabIndex = 0
        Me.btnSubmit.Text = "归还选择的图书"
        '
        'frmReturn
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(608, 317)
        Me.Controls.Add(Me.GroupBox1)
        Me.Name = "frmReturn"
        Me.Controls.SetChildIndex(Me.GroupBox1, 0)
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
    Public Overrides Sub Prepare()
        Me.Text = "图书归还"
        Me.Label1.Text = "读者编号"
        Me.Label2.Text = "读者条码"
        Me.Label3.Text = "图书编号"
        Me.ToolBar1.Visible = False
    End Sub
    Public Overrides Sub LoadData()
        Dim strFilter As String
        If txbOne.Text.Trim.Length = 0 Then
            If txbTwo.Text.Trim.Length = 0 Then
                If txbThree.Text.Trim.Length = 0 Then
                    strFilter = ""
                Else
                    strFilter = "and 图书编号 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            Else
                strFilter = "where 读者条码 like '"
                strFilter += txbTwo.Text.Trim + "%'"
                If txbThree.Text.Trim.Length <> 0 Then
                    strFilter += " and 图书编号 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            End If
        Else
            strFilter = "and 读者编号 like '"
            strFilter += txbOne.Text.Trim + "%'"
            If txbTwo.Text.Trim.Length <> 0 Then
                strFilter += " and 读者条码 like '"
                strFilter += txbTwo.Text.Trim + "%'"
                If txbThree.Text.Trim.Length <> 0 Then
                    strFilter += " and 图书编号 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            Else
                If txbThree.Text.Trim.Length <> 0 Then
                    strFilter += " and 图书编号 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            End If
        End If
        Dim db As DataBase = New DataBase
        Dim strSQL As String
        strSQL = "select 借阅编号,c.图书编号,书名 as 图书名称 ,"
        strSQL += "借阅时间,应还时间,姓名,c.读者编号,续借次数,"
        strSQL += "c.操作员,状态 from 图书信息 as a, 读者信息 as b,"
        strSQL += "图书借阅 as c where a.编号 = c.图书编号"
        strSQL += " and b.编号 = c.读者编号 "
        strSQL += strFilter + " and 状态='未还'"
        Dim dv As DataView = db.RunSelectSQL(strSQL)
        dtData = dv.Table
    End Sub
    Public Overrides Sub SetDataGrid()
        LoadData()
        '定义一个DataGrid表样式
        Dim ts As New DataGridTableStyle
        Dim aColumnTextColumn As DataGridTextBoxColumn
        Dim numCols As Integer = dtData.Columns.Count
        Dim i As Integer
        For i = 0 To numCols - 1
            aColumnTextColumn = New DataGridTextBoxColumn
            aColumnTextColumn.MappingName = _
            dtData.Columns(i).ColumnName
            aColumnTextColumn.HeaderText = _
            dtData.Columns(i).ColumnName
            aColumnTextColumn.NullText = ""
            aColumnTextColumn.ReadOnly = True
            ts.GridColumnStyles.Add(aColumnTextColumn)
        Next
        ts.AlternatingBackColor = Color.LightGray
        ts.AllowSorting = False
        ts.MappingName = dtData.TableName
        dgdList.TableStyles.Clear()
        dgdList.TableStyles.Add(ts)
        Dim dv As DataView = dtData.DefaultView
        dv.AllowNew = False
        dv.AllowDelete = False
        dv.AllowEdit = False
        '设置数据源
        dgdList.DataSource = dtData.DefaultView
        lblCount.Text = "记录数:" + dtData.Rows.Count.ToString()
    End Sub
    Private Sub btnSubmit_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles btnSubmit.Click
        Dim iRow As Integer = Me.dgdList.CurrentCell.RowNumber
        Dim number As Integer = _
        CInt(dtData.Rows(iRow)("借阅编号").ToString.Trim)
        'Dim money As Double = 

        Dim message, title, defaultValue As String
        Dim money As String = "0"
        message = "归还的图书已过期,请输入罚款金额,取消"
        title = "提示"   ' Set title.
        defaultValue = "0"
        '获取当前行的数据的日期
        Dim tmDate As Date = _
        CType((dtData.Rows(iRow)("应还时间").ToString.Trim), Date)
        '判断是否过期
        If Date.Now > tmDate Then
            '过期,则弹出对话框
            money = InputBox(message, title, defaultValue)
        End If
        If money = "" Then
            money = "0"
        End If
        Dim db As DataBase = New DataBase
        db.RunDelOrInsSQL("exec sf_图书归还 " _
        + number.ToString + ", " + money.Trim)
        LoadData()
        dtData.DefaultView.AllowDelete = False
        dtData.DefaultView.AllowNew = False
        dtData.DefaultView.AllowEdit = False
        dgdList.DataSource = dtData.DefaultView
    End Sub
End Class