主题：findrow

Dim xj As WinForm.TextBox = e.Form.Controls("作废收购凭证号")
With Tables("收购")
    Dim rr As Integer
    If rr=.findrow("[收购凭证号] like '" & xj.Text & "'And [作废] = true ") Then
        If rr > 0 Then '如果找到的话
            MessageBox.Show("该收购凭证已作废!")
        End If
    ElseIf rr=.findrow("[收购凭证号] like '" & xj.Text & "' And [作废] = false ") Then
        If rr > 0 Then '如果找到的话
            .Position = rr '定位到找到的行.
            If Functions.Execute("net20sp1") = False Then
                Return
            End If
            Dim Book As New XLS.Book(ProjectPath & "Attachments\作废收购单.xls")
            Dim fl As String = ProjectPath & "Reports\作废收购单.xls"
            Book.Build()
            Book.Save(fl)
            Dim App As New MSExcel.Application
            Dim Wb As MSExcel.WorkBook = App.WorkBooks.Open(fl)
            Dim Ws As MSExcel.WorkSheet = Wb.WorkSheets(1)
            Ws.PrintOut
            App.Quit
            Dim r As Row = Tables("收购").Current
            Dim dr As DataRow = DataTables("收购").addnew
            r("修改") = False
            r("打印") = False
            r("作废") = False
            dr("编号")=r("编号") & "-" & "已作废"
            dr("猪主姓名")=r("猪主姓名")
            dr("重量")=r("重量")
            dr("单价")=r("单价")
            dr("日期")=r("日期")
            dr("年")=r("年")
            dr("月")=r("月")
            dr("日")=r("日")
            dr("修改")=True
            dr("打印")=True
            dr("收购凭证号")=r("收购凭证号")
            dr("字符日期")=r("字符日期")
            dr("作废")=True
            dr("销售已录入")=r("销售已录入")
            r("收购凭证号") = ""
        End If
    End If
End With

上述代码我想效果是：在文本框中的输入作废的收购凭证号，然后点击作废控件（上述代码）并且能同时处理多条符合条件的，但不起作用。

是不是代码：  If rr=.findrow("[收购凭证号] like '" & xj.Text & "'And [作废] = true ") Then  出现问题？