听'说'——VB报表

拖了好久，终于有机会写上这篇博客了——折腾我许久的VB报表问题。实际上，在十一假期之前基本上都做完了，后来因为自考的关系，才一直没有时间来完善（自己给自己的借口！）那时候作出的报表，只能返回周结账单中所有记录，而不能返回指定日期的记录。上次头脑风暴的时候，偶然间听说了一个属性，这才完完整整的解决这个问题：返回任意指定日期的结账记录！

第一步：下载Grid Report ，然后安装。（这是下载地址：Grid Report 下载地址）

第二步：添加引用和部件（部件：和引用：）
第三步：在VB窗体上添加 GrdisplayViewer控件

第四步：编写代码：第一次犯错时的代码：（其中错误是不能解决指定日期的记录检索不出来）

Option Explicit
    Dim Report As grproLibCtl.GridppReport
    Dim Reportheader As IGRReportHeader
    Dim StaticBox As IGRStaticBox

Private Sub Rshow()

    Dim strsql As String
    Dim strMsg As String

    strsql = "select * from checkday_info where date>='" & Format$(cmbBeginDate.Text,"yyyy-mm-dd") & "' and date<='" & Format$(cmbEndDate.Text,"yyyy-mm-dd") & "'"

    Set Report = New grproLibCtl.GridppReport
    Report.LoadFromFile (App.Path & "\checkWeek.grf")   '加载模版
    Report.DetailGrid.Recordset.ConnectionString = "filedsn=charge.dsn;UID=sa;PWD=123456"    '数据源
    Report.DetailGrid.Recordset.Querysql = strsql               '通过SELECT查询创建记录集

    '=================报表中自定义控件================

    Set Reportheader = Report.InsertReportHeader

    '插入一个静态文本框,显示需要显示的文字
    Set StaticBox = Reportheader.Controls.Add(grctStaticBox).AsstaticBox
    StaticBox.Text = cmbBeginDate.Text & "   至   " & cmbEndDate.Text
    StaticBox.Width = 500
    '============================

    GrdisplayViewer1.Report = Report
    GrdisplayViewer1.Start
End Sub

Private Sub cmdcmdPrintRefresh_Click()
    StaticBox.Text = cmbBeginDate.Text & "   至   " & cmbEndDate.Text
    GrdisplayViewer1.Refresh     '刷新
End Sub

Private Sub cmdPrint_Click()
    Report.[Print] (True)        '打印
End Sub

Private Sub cmdViewPrint_Click()
    Report.PrintPreview (True)     '打印预览
End Sub

Private Sub cmbBeginDate_DropDown()
    MonthView1.Visible = True
End Sub


Private Sub cmbEndDate_DropDown()
    MonthView2.Visible = True
End Sub

Private Sub MonthView1_DateClick(ByVal DateClicked As Date)
    cmbBeginDate.Text = MonthView1.Year & "-" & MonthView1.Month & "-" & MonthView1.Day
    MonthView1.Visible = False
    
End Sub


Private Sub MonthView2_DateClick(ByVal DateClicked As Date)
    cmbEndDate.Text = MonthView2.Year & "-" & MonthView2.Month & "-" & MonthView2.Day
    MonthView2.Visible = False

End Sub
Private Sub Form_Load()

    MonthView1.Visible = False
    MonthView2.Visible = False
'    cmbBeginDate.Text = Format$("2012-08-08","YYYY-MM-DD")
'    cmbEndDate.Text = Format$(Date,"YYYY-MM-DD")
    Me.Width = 15000
    Me.Height = 13000
     
    Call Rshow
    
End Sub

第二次，是在听同学说了一个stop 属性的时候，自己重新试了一下，结果相对满意，能够实现返回指定日期的源码：

Option Explicit
Dim Report As grproLibCtl.GridppReport
Dim Reportheader As IGRReportHeader
Dim StaticBox As IGRStaticBox

Private Sub Rshow()

    Dim strsql As String
    Dim strMsg As String

    strsql = "select * from checkday_info where date>='" & Format$(cmbBeginDate.Text,显示需要显示的文字
    Set StaticBox = Reportheader.Controls.Add(grctStaticBox).AsstaticBox
    StaticBox.Text = cmbBeginDate.Text & "   至   " & cmbEndDate.Text
    StaticBox.Width = 500
    '============================

    GrdisplayViewer1.Report = Report
    GrdisplayViewer1.Start
End Sub


Private Sub cmdcmdPrintRefresh_Click()
    GrdisplayViewer1.Stop
    StaticBox.Text = cmbBeginDate.Text & "   至   " & cmbEndDate.Text
    Call Rshow

End Sub

Private Sub cmdPrint_Click()
    Report.[Print] (True)        '打印
End Sub

Private Sub cmdViewPrint_Click()
    Report.PrintPreview (True)     '打印预览
End Sub

Private Sub cmbBeginDate_DropDown()
    MonthView1.Visible = True
End Sub


Private Sub cmbEndDate_DropDown()
    MonthView2.Visible = True
End Sub


Private Sub MonthView1_DateClick(ByVal DateClicked As Date)
    cmbBeginDate.Text = MonthView1.Year & "-" & MonthView1.Month & "-" & MonthView1.Day
    MonthView1.Visible = False
    
End Sub


Private Sub MonthView2_DateClick(ByVal DateClicked As Date)
    cmbEndDate.Text = MonthView2.Year & "-" & MonthView2.Month & "-" & MonthView2.Day
    MonthView2.Visible = False

End Sub

Private Sub Form_Load()

    MonthView1.Visible = False
    MonthView2.Visible = False
        cmbBeginDate.Text = Format$("2012-08-08","YYYY-MM-DD")
        cmbEndDate.Text = Format$(Date,"YYYY-MM-DD")
    Me.Width = 15000
    Me.Height = 13000

        Call Rshow

End Sub

可以对比出来，那个区别是在 cmdcmdPrintRefresh_Click()事件下，先将报表给停止，然后重新调用声明的子过程。

如果不停止的话，就会报错：

总结一下：偶然听别人说的方法，自己可以试一下！还有就是，有了思路就要及时的写，不然就会导致再想写的时候，思维的短路，我写这篇博客就是又看了好久我前面的代码才写出来的！

原文地址：https://www.jb51.cc/vb/259446.html

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