【发布时间】：2013-05-12 18:37:13
【问题描述】：
我有以下错误：
The process cannot access the file because it is being used by another process.
试图保存一个文件然后阅读它，你能帮我修复代码吗？
protected void Button1_Click(object sender, EventArgs e)
{
string path = "\\\\nasouts01\\CodiceDiRete\\temp\\";
if (FileUpload1.HasFile)
{
string fileExt =
System.IO.Path.GetExtension(FileUpload1.FileName);
if (fileExt == ".csv")
{
try
{
FileUpload1.SaveAs(path + FileUpload1.FileName);
}
catch (Exception ex)
{
Label1.Text = "ERROR: " + ex.Message.ToString();
}
finally
{
FileUpload1.PostedFile.InputStream.Flush();
FileUpload1.PostedFile.InputStream.Close();
FileUpload1.FileContent.Dispose();
//Release File from Memory after uploading
}
}
else
{
Label1.Text = "Selezionare soltanto file .csv";
gwreportpub.Visible = false;
ButtonConferma.Visible = false;
ButtonAnnulla.Visible = false;
ButtonPulisci.Visible = false;
return;
}
}
else
{
Label1.Text = "Inserire un file ";
gwreportpub.Visible = false;
ButtonConferma.Visible = false;
ButtonAnnulla.Visible = false;
ButtonPulisci.Visible = false;
return;
}
/*
Validazione nel file , dopo visualizzazione dei dati nella tabella
*/
int count = 0;
string line;
// Read the file and display it line by line.
using (System.IO.StreamReader file =
new System.IO.StreamReader(path+FileUpload1.FileName))
{
while((line = file.ReadLine()) != null)
{
count = line.Split(',').Length;
if(count != 12){
Label1.Text = "Il file non contiene il numero esatto di campi che servono al caricamento";
gwreportpub.Visible = false;
ButtonConferma.Visible = false;
ButtonAnnulla.Visible = false;
ButtonPulisci.Visible = false;
return;
}
}
file.Close();
}
/*
Prendo il valore della sequence
*/
OracleCommand sequenceCmd = new OracleCommand("select ls_seq_batchrequest.nextval from dual",connection);
OracleDataReader reader = sequenceCmd.ExecuteReader();
int sequenceVal=0;
while (reader.Read())
{
//dropdownlist1.Items.Insert(0, new ListItem(reader.GetString(0), reader.GetString(0)));
sequenceVal = reader.GetInt32(0);
}
reader.Close();
Session["sequenceVal"] = sequenceVal;
/*
Faccio l'inserimento a db dei dati e visualizzo la tabella
*/
OracleTransaction myTrans = null;
OracleCommand cmd = new OracleCommand("INSERT INTO ZTMP_SAM_TB_ELAB_PDR(facilityid,taxid,plantcode,ca_pdr, fullmeterkey_m1, corrmeterid_m1, " +
"stopreading_m1, corrstopreading_m1,fullmeterkey_m2, corrmeterid_m2, " +
"stopreading_m2, corrstopreading_m2, stopreadtime_m1,stopreadtime_m2,uidbatchrequest) " +
" VALUES (:1,:2,:3,:4,:5,:6,:7,:8,:9,:10,:11,:12,:13,:14,:15)", connection);
//myTrans = connection.BeginTransaction();
//cmd.Transaction = myTrans;
/*
( :facilityid,:taxid,
:plantcode,:capdr,:fullmetkeym2,
:corrmetidm2,:stopreadingm2,
:corrstopreadm2,:fullmetkeym1,
:corrmetidm1,:stopreadingm1,:corrstopreadm1,
:stopreadtimem2,:stopreadtimem1)
*/
using (System.IO.StreamReader file2 =
new System.IO.StreamReader(path+FileUpload1.FileName))
{
//System.IO.StreamReader file2 = new System.IO.StreamReader(path+FileUpload1.FileName);
try
{
while((line = file2.ReadLine()) != null)
{
string[] split = line.Split(',');
cmd.Parameters.Add("1", OracleType.VarChar, 64).Value = split[0];
cmd.Parameters.Add("2", OracleType.VarChar, 64).Value = "";
cmd.Parameters.Add("3", OracleType.VarChar, 64).Value = "";
cmd.Parameters.Add("4", OracleType.Number).Value = Convert.ToInt32(split[1]);
cmd.Parameters.Add("5", OracleType.VarChar, 64).Value = split[6];
cmd.Parameters.Add("6", OracleType.VarChar, 64).Value = split[7];
cmd.Parameters.Add("7", OracleType.Number).Value = Convert.ToInt32(split[8]);
cmd.Parameters.Add("8", OracleType.Number).Value = Convert.ToInt32(split[9]);
cmd.Parameters.Add("9", OracleType.VarChar, 80).Value = split[2];
cmd.Parameters.Add("10", OracleType.VarChar, 80).Value = split[3];
cmd.Parameters.Add("11", OracleType.Number).Value = Convert.ToInt32(split[4]);
cmd.Parameters.Add("12", OracleType.Number).Value = Convert.ToInt32(split[5]);
DateTime date1,date2;
DateTime.TryParseExact(split[10], "dd/MM/yyyy", null, System.Globalization.DateTimeStyles.None, out date1);
DateTime.TryParseExact(split[11], "dd/MM/yyyy", null, System.Globalization.DateTimeStyles.None, out date2);
cmd.Parameters.Add("13", OracleType.DateTime).Value = date1;
cmd.Parameters.Add("14", OracleType.DateTime).Value = date2;
cmd.Parameters.Add("15", OracleType.Number).Value = sequenceVal;
cmd.ExecuteNonQuery();
/*Per ogni elemento esegui l'insert*/
}
//myTrans.Commit();
}
catch(Exception ex){
//myTrans.Rollback();
Label1.Text = ex.Message;
return;
//"Si e' verificato un errore nell'inserimento dei dati nella tabella ZTMP_SAM_TB_ELAB_PDR";
}
file2.Close();
}
}
【问题讨论】：
-
这是一个很大的方法，我建议你把这个过程分解成一些较小的方法，从那里调试起来会更容易
-
只是与您当前问题无关的提示：在 c# 中使用字符串文字来消除转义路径的需要。例如：
string path = @"\\nasouts01\CodiceDiRete\temp\";msdn.microsoft.com/en-us/library/aa691090(v=vs.71).aspx -
您是否尝试过更改路径另存为本地磁盘而不是保存到网络共享路径？到目前为止，当我尝试将其保存到本地磁盘时，它在我身边运行良好。我怀疑您的问题取决于您的环境。
-
您可以使用下面的工具来检查哪个应用程序锁定了您的文件：technet.microsoft.com/en-us/sysinternals/bb896653.aspx 或 dr-hoiby.com/WhoLockMe
-
在我看来，您需要检查您上传文件的文件服务器。它应该关闭任何扫描进程（病毒、清理程序）以确保没有其他进程访问您的文件。或者您应该上传到临时本地驱动器以确保不会发生此问题。