error BC30037: Character is not valid. 这个error 的位置是 Dim strSQL As String = $"SELECT SettingName, SettingValue FROM SI_SETTING Where ApplicationName = 'EDA1085' And SiteCode = '{HttpContext.Current.Application("SiteCode") }' And SettingName in ('ImportLocation','ProcessedFileRoot')" 这段代码有什么问题?
时间: 2024-03-01 19:50:49 浏览: 51
这段代码的问题在于字符串插值符号中使用了美元符号($)而不是井号(#)。这个错误是由于这段代码运行在VB.NET语言环境下,而美元符号是C#语言环境下的字符串插值符号,VB.NET中应该使用井号(#)作为字符串插值符号。可以将代码修改为:
```
Dim strSQL As String = $"SELECT SettingName, SettingValue FROM SI_SETTING Where ApplicationName = 'EDA1085' And SiteCode = '{HttpContext.Current.Application("SiteCode")}' And SettingName in ('ImportLocation','ProcessedFileRoot')"
```
将美元符号($)改为井号(#)即可。
相关问题
帮我优化以下代码,每10000行导出至新EXECL表直至数据记录导完: Dim db As DAO.Database Dim rs As DAO.Recordset Dim strSQL As String Dim strFileName As String Dim i As Long '设置导出文件路径和文件名 strFileName = "C:\Users\icd\Desktop\流水分割" Set db = CurrentDb() strSQL = "SELECT 导出数据.* FROM 导出数据" Set rs = db.OpenRecordset(strSQL, dbOpenSnapshot) '每10000条记录导出到一个新的文件 Do While Not rs.EOF If i Mod 10000 = 0 Then If i <> 0 Then DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "ExportData", strFileName & Format(i, "000000") & ".xlsx", True End If rs.Close Set rs = db.OpenRecordset("导出数据", dbOpenSnapshot) End If i = i + 1 rs.MoveNext Loop '导出最后一份文件 If i Mod 10000 <> 0 Then DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "导出数据", strFileName & Format(i - (i Mod 10000), "000000") & ".xlsx", True End If rs.Close Set rs = Nothing Set db = Nothing
可以尝试使用ADO来优化代码,ADO可以更快地处理大量数据。以下是优化后的代码:
```
Dim adoConn As New ADODB.Connection
Dim adoRS As New ADODB.Recordset
Dim strSQL As String
Dim strFileName As String
Dim i As Long
Dim rowCount As Long
'设置导出文件路径和文件名
strFileName = "C:\Users\icd\Desktop\流水分割\"
'连接数据库
adoConn.Open "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & CurrentDb.Name
'查询数据记录数
strSQL = "SELECT COUNT(*) FROM 导出数据"
Set adoRS = adoConn.Execute(strSQL)
rowCount = adoRS.Fields(0).Value
adoRS.Close
'每10000条记录导出到一个新的文件
i = 0
Do While i < rowCount
strSQL = "SELECT TOP 10000 * FROM 导出数据 WHERE ID > " & i & " ORDER BY ID"
adoRS.Open strSQL, adoConn, adOpenStatic, adLockReadOnly
If Not adoRS.EOF Then
'导出到Excel文件
DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "ExportData", strFileName & Format(i, "000000") & ".xlsx", True
End If
i = i + 10000
adoRS.Close
Loop
'关闭连接
adoConn.Close
Set adoRS = Nothing
Set adoConn = Nothing
```
优化后的代码使用ADO连接到数据库,查询数据记录数,并使用TOP和ORDER BY语句每次查询10000条记录。同时,将rs对象改为adoRS对象,使用ADO特有的方法来操作记录集。这样可以更快地处理大量数据,并且可以避免使用DAO时出现的内存溢出问题。
帮我优化以下代码Private Sub Command9_Click() Dim db As DAO.Database Dim rs As DAO.Recordset Dim strSQL As String Dim strFileName As String Dim i As Long Dim batchSize As Long '每批次导出的记录数 Dim batchCount As Long '批次计数器 Dim exportCount As Long '导出计数器 '设置导出文件路径和文件名 strFileName = "C:\Users\icd\Desktop\流水分割\" batchSize = 10000 '每批次导出的记录数 Set db = CurrentDb() strSQL = "SELECT 导出数据.* FROM 导出数据" Set rs = db.OpenRecordset(strSQL, dbOpenSnapshot) '循环导出数据 Do While Not rs.EOF If exportCount Mod batchSize = 0 Then '每批次导出到一个新的文件 If exportCount <> 0 Then DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "ExportData", strFileName & Format(batchCount, "000000") & ".xlsx", True End If batchCount = batchCount + 1 End If exportCount = exportCount + 1 rs.MoveNext Loop '导出最后一份文件 If exportCount Mod batchSize <> 0 Then DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, "导出数据", strFileName & Format(batchCount, "000000") & ".xlsx", True End If rs.Close Set rs = Nothing Set db = Nothing End Sub
这段代码的主要功能是将Access数据库中的数据按批次导出到Excel文件中。以下是几点建议来优化这段代码:
1. 将变量声明放在代码的开头,以提高代码可读性和可维护性。
2. 考虑使用更具描述性的变量名,以提高代码可读性。
3. 考虑添加一些错误处理代码,以确保程序能够正常运行并提示错误信息。
4. 将DoCmd.TransferSpreadsheet方法的调用封装在一个单独的函数中,这样可以减少重复代码。
改进后的代码如下:
Private Sub Command9_Click()
Dim db As DAO.Database
Dim rs As DAO.Recordset
Dim strSQL As String
Dim strFileName As String
Dim i As Long
Dim batchSize As Long '每批次导出的记录数
Dim batchCount As Long '批次计数器
Dim exportCount As Long '导出计数器
'设置导出文件路径和文件名
strFileName = "C:\Users\icd\Desktop\流水分割\"
batchSize = 10000 '每批次导出的记录数
Set db = CurrentDb()
strSQL = "SELECT 导出数据.* FROM 导出数据"
Set rs = db.OpenRecordset(strSQL, dbOpenSnapshot)
On Error GoTo ErrorHandler
'循环导出数据
Do While Not rs.EOF
If exportCount Mod batchSize = 0 Then
'每批次导出到一个新的文件
If exportCount <> 0 Then
ExportToExcel "ExportData", strFileName & Format(batchCount, "000000") & ".xlsx", True
End If
batchCount = batchCount + 1
End If
exportCount = exportCount + 1
rs.MoveNext
Loop
'导出最后一份文件
If exportCount Mod batchSize <> 0 Then
ExportToExcel "导出数据", strFileName & Format(batchCount, "000000") & ".xlsx", True
End If
rs.Close
Set rs = Nothing
Set db = Nothing
Exit Sub
ErrorHandler:
MsgBox "Error " & Err.Number & ": " & Err.Description, vbCritical, "Error"
Exit Sub
End Sub
Private Sub ExportToExcel(tableName As String, fileName As String, hasHeaderRow As Boolean)
DoCmd.TransferSpreadsheet acExport, acSpreadsheetTypeExcel12Xml, tableName, fileName, hasHeaderRow
End Sub
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