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---- 代码导入excel数据存在逻辑列数据时会报错 (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=157107)
-- 发布时间：2020/10/3 8:38:00
-- 代码导入excel数据存在逻辑列数据时会报错
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
-- 发布时间：2020/10/6 9:04:00
--
代码看不出什么问题，请上传实例测试
-- 发布时间：2020/10/7 3:04:00
--
第一个问题：把excel里对应逻辑列里的FALSE 或TRUE删除重新输入一遍就可以导入不报错了。
第二个问题：还是只会新增，不会更新，当有项目编号存在时就会报错。
此主题相关图片如下：11.png
-- 发布时间：2020/10/7 3:07:00
--
自定义函数代码如下
Dim str,drl,sheetname As String
Dim dt As DataTable
Select Case args.Length
Case 0
MessageBox.Show("参数不全“)
Return Nothing
Case 1
If CStr(args(0)) = "?" Then
Return Nothing
Else
MessageBox.Show("参数不全,至少需要输入目标表名,对应列名两个参数!","警告")
Return Nothing
End If
Case 2
dt = DataTables(args(0))
drl = args(1)
Case 3
dt = DataTables(args(0))
drl = args(1)
sheetname = args(2)
Case Else
MessageBox.Show("参数过多!","提示")
Return Nothing
End Select
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
If args.length = 2 Then Ws = Wb.WorkSheets(1)
If args.length > 2 Then Ws = Wb.WorkSheets(sheetname)
wb.saved = True
Dim Rg As MSExcel.Range = Ws.UsedRange
Dim ary = rg.value
dt.ResumeRedraw()
dt.StopRedraw()
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(drl))
If sfzhm = "" Then Continue For
Dim dr As DataRow = dt.Find("\'" & drl & "\' =\'" & sfzhm & "\'")
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(drl))
If sfzhm = "" Then Continue For
Dim dr As DataRow = dt.Find("\'" & drl & "\' =\'" & 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
n1+= 1
Else
ndr = dic(l)
n2+= 1
End If
Next
app.quit
catch ex As exception
msgbox(ex.message)
app.quit
End try
End If
End If
-- 发布时间：2020/10/7 8:50:00
--
上面代码没看到有3楼这个提示文字，是表事件datacolchanging的吧，导入的时候屏蔽一下事件：http://www.foxtable.com/webhelp/topics/2218.htm
-- 发布时间：2020/10/7 10:09:00
--
哦，明白，万分感谢！datacolchanging我设置了不允许重复编号，忘记了。
-- 发布时间：2020/10/7 21:51:00
--
老师，以下自定义函数还存在问题:当导入的bm已经存在时,不是更新,还是会增加一行.
Dim str,drl,sheetname As String
Dim dt As DataTable
Dim Sheet As XLS.Sheet
Select Case args.Length
Case 2
dt = DataTables(args(0))
drl = args(1)
Case 3
dt = DataTables(args(0))
drl = args(1)
sheetname = args(2)
Case Else
Return Nothing
End Select
Dim Result As DialogResult
Result = MessageBox.Show("要导入excel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
systemready = False
try
For Each fl As String In dlg.FileNames
Dim Book As New XLS.Book(fl)
If args.length = 2 Then Sheet = Book.Sheets(0)
If args.length > 2 Then Sheet = Book.Sheets(sheetname)
dt.ResumeRedraw()
dt.StopRedraw()
Dim nms As New Dictionary(Of String, Integer)
Dim dic As new Dictionary(Of DataRow, Integer)
Dim ls As new List(Of Integer)
For c As Integer = 0 To sheet.Cols.Count - 1
If dt.DataCols.Contains(sheet(0,c).Text.replace(" ", "")) Then
nms.Add(sheet(0,c).Text.replace(" ", ""), c)
End If
Next
For n As Integer = 1 To Sheet.Rows.Count -1
Dim bm As String = sheet(n,nms(drl)).Text
If bm = "" Then Continue For
Dim dr As DataRow = dt.Find("\'" & drl & "\' = \'" & bm & "\'")
If dr Is Nothing Then
ls.add(n)
Else
dic.Add(dr, n)
End If
Next
For Each key As DataRow In dic.Keys
For Each m As String In nms.keys
If dt.DataCols(m).IsBoolean Then
If Sheet(dic(key),nms(m)).Text = "" OrElse Sheet(dic(key),nms(m)).Text = "False" OrElse Sheet(dic(key),nms(m)).Value = 0 Then
key(m) = False
Else
key(m) = True
End If
Else If dt.DataCols(m).Expression > "" Then
\'表达式列
Else If dt.DataCols(m).IsNumeric Then
key(m) = val(Sheet(dic(key),nms(m)).Value)
Else If dt.DataCols(m).IsDate Then
Dim d As Date
If Date.TryParse(Sheet(dic(key),nms(m)).Value, d)
key(m) = d
End If
Else
key(m) = Sheet(dic(key),nms(m)).Value
End If
Next
Next
For Each l As Integer In ls
Dim ndr As DataRow = dt.AddNew
For Each m As String In nms.keys
If dt.DataCols(m).IsBoolean Then
If Sheet(l,nms(m)).Text = "" OrElse Sheet(l,nms(m)).Text = "False" OrElse Sheet(l,nms(m)).Value = 0 Then
ndr (m) = False
Else
ndr (m) = True
End If
Else If dt.DataCols(m).Expression > "" Then
Else If dt.DataCols(m).IsNumeric Then
ndr (m) = val(Sheet(l,nms(m)).Value)
Else If dt.DataCols(m).IsDate Then
Dim d As Date
If Date.TryParse(Sheet(l,nms(m)).Value, d)
ndr (m) = d
End If
Else
ndr (m) = Sheet(l,nms(m)).Value
End If
Next
Next
dt.ResumeRedraw()
Next
Catch ex As Exception
MessageBox.Show("导入失败")
End Try
SystemReady = True
End If
End If
-- 发布时间：2020/10/8 8:51:00
--
Dim dr As DataRow = dt.Find(drl & " = \'" & bm & "\'")