有两个问题请教：
1）下面的代码导入excel数据，当excel逻辑列有数据时，无论是什么数据都会提示转换错误。
2）下面的代码改成自定义函数时，当存在相同项目编号的数据时不会更新，会提示存在相同的项目编号让修改。只能导入不存在的新编号数据。
请大神帮忙。
Dim dt As DataTable = DataTables("项目信息")
Dim Result As DialogResult
Result = MessageBox.Show("确定要导入excel数据吗?", "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 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("项目编号"))
If sfzhm = "" Then Continue For
Dim dr As DataRow = dt.Find("项目编号 ='" & sfzhm & "'")
' n +=1
If dr IsNot Nothing Then
Result = MessageBox.Show("有重复项目编号存在,是否覆盖导入?"& vbcrlf &"是---覆盖导入(将更新原有编号项目数据)"& vbcrlf &"否---新增导入(仅增加新项目编号数据)", "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("项目编号"))
If sfzhm = "" Then Continue For
Dim dr As DataRow = dt.Find("项目编号 ='" & 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
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
app.quit
'systemready = True
catch ex As exception
msgbox(ex.message)
app.quit
End try
End If
End If
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Post By：2020/10/3 8:38:00 [只看该作者]
