使用 OleDB 从 Excel 文件导入数据后无法删除该文件,表示该文件正在被另一个进程使用
我正在使用 OleDB 从 ASP.NET 中的 Excel 文件导入数据。完成导入后,我想使用命令 System.IO.File.Delete() 删除文件,但它引发以下异常:
The process cannot access the file '...29.xls' because it is being used by another process.
我使用以下代码打开和关闭文件:
Dim fajl As String
fajl = MapPath("fajlovi/" + Request.QueryString("ID"))
Dim sConnectionStringExcel As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & fajl & ";Extended Properties=Excel 8.0;"
Dim objConnExcel As New OleDbConnection(sConnectionStringExcel)
objConnExcel.Open()
Dim objCmdSelectExcel As New OleDbCommand("SELECT ZavedenKodPov, Ime, Mjesto, Adresa, JMBG, LicniBroj, ZaposlenKod, Nepoznat, Umro, Penzioner, Reon, VoziloProizvodjac, VoziloModel, VoziloRegistracija, Nekretnina, Datum, KontoBroj, NazivKonta, OpisPromjene, Dug, Pot FROM [Sheet1$]", objConnExcel)
Dim objAdapterExcel As New OleDbDataAdapter()
objAdapterExcel.SelectCommand = objCmdSelectExcel
Dim objDatasetExcel As New DataSet()
objAdapterExcel.Fill(objDatasetExcel, "XLData")
Dim tExcel As DataTable
tExcel = objDatasetExcel.Tables(0)
'.
'.
'.
objConnExcel.Close()
System.IO.File.Delete(fajl)
任何想法我在做什么错误的?
I'm importing data from an Excel file in ASP.NET using OleDB. After finishing the import, I want to delete the file using the command System.IO.File.Delete(), but it throws the following exception:
The process cannot access the file '...29.xls' because it is being used by another process.
I used the following code to open and close the file:
Dim fajl As String
fajl = MapPath("fajlovi/" + Request.QueryString("ID"))
Dim sConnectionStringExcel As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & fajl & ";Extended Properties=Excel 8.0;"
Dim objConnExcel As New OleDbConnection(sConnectionStringExcel)
objConnExcel.Open()
Dim objCmdSelectExcel As New OleDbCommand("SELECT ZavedenKodPov, Ime, Mjesto, Adresa, JMBG, LicniBroj, ZaposlenKod, Nepoznat, Umro, Penzioner, Reon, VoziloProizvodjac, VoziloModel, VoziloRegistracija, Nekretnina, Datum, KontoBroj, NazivKonta, OpisPromjene, Dug, Pot FROM [Sheet1$]", objConnExcel)
Dim objAdapterExcel As New OleDbDataAdapter()
objAdapterExcel.SelectCommand = objCmdSelectExcel
Dim objDatasetExcel As New DataSet()
objAdapterExcel.Fill(objDatasetExcel, "XLData")
Dim tExcel As DataTable
tExcel = objDatasetExcel.Tables(0)
'.
'.
'.
objConnExcel.Close()
System.IO.File.Delete(fajl)
Any ideas what I'm doing wrong?
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处理命令和连接,最好包含在 using 语句中。那么你应该能够删除该文件。
dispose of the command and connection, preferably wrapped in a using statement. then you should be able to delete the file.