蓝老师好！

采用下列代码导入大量execl行数据时，有时会直接退出系统，是什么原因？

1、允许选中多个execl文件批量导入，但是只导入一个；

2、退出系统的原因，跟加入的导入过程提示代码（加黑的）有关吗？

谢谢！

 
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\'\'\'
If DataTables.Contains("统计数据表") = False Then
    DataTables.Load("统计数据表")
End If
DataTables("统计数据表").LoadTop = ""
DataTables("统计数据表").Loadpage = 0
DataTables("统计数据表").LoadFilter = ""
DataTables("统计数据表").Load

Dim dt As DataTable = DataTables("统计数据表")
Dim Result As DialogResult
Result = MessageBox.Show("确定要导入吗?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
If Result = DialogResult.Yes Then
    Dim dlg As New OpenFileDialog
    dlg.Filter = "Excel文件|*.xls;*.xlsx"
    dlg.MultiSelect = True \'允许选择多个文件
    If dlg.ShowDialog =DialogResult.OK Then

        Dim stt As Date = Date.Now   \'开始计时
       
        Dim App As New MSExcel.Application
        try
            Dim Wb As MSExcel.WorkBook = App.WorkBooks.Open(dlg.FileName)
            Dim Ws As MSExcel.WorkSheet = Wb.WorkSheets(1)
            wb.saved = True
            Dim Rg As MSExcel.Range = Ws.UsedRange
            Dim ary = rg.value
           
            dt.ResumeRedraw()
            dt.StopRedraw()
            \'systemready = False
            Dim nms As New Dictionary(Of String, Integer)
            Dim dic As new Dictionary(Of Integer,DataRow)
            Dim ls As new List(Of Integer)
           
            For c As Integer = 1 To Rg.Columns.count
                If  dt.DataCols.Contains(ary(1,c).replace(" ", "")) Then
                    nms.Add(ary(1,c).replace(" ", ""), c)
                End If
            Next
           
            Dim flag As Boolean = True
           
            For n As Integer = 2 To Rg.Rows.count
                Dim sfzhm As String = ary(n,nms("案号"))
                If sfzhm = "" Then Continue For
                Dim dr As DataRow = dt.Find("案号 = \'" & sfzhm & "\'")
                \' n +=1
                If dr IsNot Nothing Then
                    Result = MessageBox.Show("有重复案号,是否覆盖导入?"& vbcrlf &"是---覆盖导入(将更新原有案号数据)"& vbcrlf &"否---新增导入(仅增加新案号数据)", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
                    If Result = DialogResult.Yes Then
                        flag = True
                    Else
                        flag = False
                    End If
                    Exit For
                End If
            Next
           
            For n As Integer = 2 To Rg.Rows.count
                Dim sfzhm As String = ary(n,nms("案号"))
                If sfzhm = "" Then Continue For
                Dim dr As DataRow = dt.Find("案号 = \'" & sfzhm & "\'")
                If dr Is Nothing Then
                    dic.Add(n,Nothing)
                ElseIf flag = True
                    dic.Add(n,dr)
                End If
            Next
           
            For Each l As Integer In dic.Keys
                Dim ndr As DataRow
                If dic(l) Is Nothing Then
                    ndr = dt.AddNew
                Else
                    ndr  = dic(l)
                End If
                For Each m As String In nms.keys
                    If dt.DataCols(m).IsBoolean Then
                        If ary(l,nms(m))= "" OrElse ary(l,nms(m))= "False" OrElse ary(l,nms(m))= 0 Then
                            ndr (m) = False
                        Else
                            ndr (m) = True
                        End If
                    Else If dt.DataCols(m).Expression > "" Then
                        \'表达式列
                    Else If dt.DataCols(m).IsNumeric Then
                        ndr (m) = val(ary(l,nms(m)))
                    Else If dt.DataCols(m).IsDate Then
                        Dim d As Date
                        If Date.TryParse(ary(l,nms(m)), d)
                            ndr (m) = d
                        End If
                    Else
                        ndr (m) = ary(l,nms(m))
                    End If
                   
                Next
               
                If Forms("导入提示").opened =False Then
                    Forms("导入提示").open()
                End If
                Forms("导入提示").Controls("TextBox1").text = "数据导入中......"    & vbcrlf &  vbcrlf & "共"  & Rg.Rows.count -1 &  "行" & vbcrlf & vbcrlf & "正在导入第"  & l &  "行：" & ndr("案号")
               
            Next
            dt.ResumeRedraw()
           
            Dim n1,n2 As Integer
            For Each l As Integer In dic.Keys
                Dim ndr As DataRow
                If dic(l) Is Nothing Then
                    \'ndr = dt.AddNew
                    n1+= 1
                Else
                    ndr  = dic(l)
                    n2+= 1
                End If
            Next
           
            Forms("导入提示").Controls("TextBox1").text = "新增：" & n1 & vbcrlf &  vbcrlf &  "更新：" & n2 & vbcrlf & vbcrlf & "耗时：" & (Date.Now - stt).TotalSeconds & "秒"
           
            app.quit
            \'systemready = True
        catch ex As exception
            msgbox(ex.message)
            app.quit
        End try
    End If
End If