我很困惑它是服务器问题还是编码问题。我强烈猜测它可能是服务器问题，因为它在我的本地系统上工作正常。
我已将Asp.net 1.1网站升级到4.0。在应用程序中，文件由用户在表单上输入的值创建。该文件保存在应用程序的附件文件夹中。创建文件后，将电子邮件发送给管理员，并将该文件作为附件附加。
在我的本地系统上，电子邮件发送得很好。由于应用程序是在1.1中构建的，CDO正用于发送电子邮件。当我在服务器上发布应用程序时，附件失败并显示以下错误
The process cannot access the file 'E:\HostingSpaces\testuser\testapplication.mydomain.com\wwwroot\eTest\Attachment\4orsysil3dulr1iv1thvpade\ef_Comp.exp' because it is being used by another process.
我已经给了附件文件夹的读，写，删除权限。如果代码中存在问题，那么它也应该影响本地系统上的应用程序。我已经检查过所有StreamWriter在任何地方都被关闭了。
如果这是服务器错误，那可能是什么原因？
编辑： 代码是很久以前写的很老，它工作得很好。我所做的是更改了电子邮件发送代码并指定了SSL和用于发送SMS的新端口。除此之外它之前没有给出错误。
以下是用户在提交表单时生成文件的功能。每个表单都会生成多个文件。
private bool GenerateFile()
{
string strSupportDocFile=string.Empty;
string strBespokeFile=string.Empty;
EFormDetails objEFormDetails=new EFormDetails();
DataRow drEForm=objEFormDetails.ResultRow;
string strDirPath = Server.MapPath(@"Attachment/" + Session.SessionID);
try
{
if (!Directory.Exists(strDirPath))
{
Directory.CreateDirectory(strDirPath);
}
StreamWriter ef_File;
StringBuilder strFile=new StringBuilder();
ef_File = new StreamWriter(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EF_COMP_FILENAME));
if(objEFormDetails._EF_COMP != string.Empty)
{
strFile.Append(objEFormDetails._EF_COMP);
ef_File.WriteLine(strFile.ToString());
ef_File.Close();
sbOnFloppyComp=strFile;
}
ef_File = null;
strFile=null;
StringBuilder ef_Cost=new StringBuilder();
strFile=new StringBuilder();
ef_File = new StreamWriter(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EF_COST_FILENAME));
if(objEFormDetails._EF_COST != string.Empty)
{
strFile.Append(objEFormDetails._EF_COST);
ef_File.WriteLine(strFile.ToString());
ef_File.Close();
sbOnFloppyCost=strFile;
}
GetMemberData();
GetOtherDirectorsData();
if(base.IsGuestUser())
{
string strEmailBody;
strEmailBody=GenerateBody();
string strpackage = strEmailBody;
GetPackageDetails(strpackage);
}
return true;
}
catch(Exception ex)
{
lblError.Text=ex.Message.ToString();
return false;
}
}
GetMemberData（）函数：
private void GetMemberData()
{
EFormDetails objEFormDetails = new EFormDetails();
DataRow drEForm = objEFormDetails.ResultRow;
if (drEForm != null)
{
string strDirPath = Server.MapPath(@"Attachment/" + Session.SessionID);
eFormation.Business.EFDIR efdir = new eFormation.Business.EFDIR();
eFormationResult objResult;
objResult = efdir.LoadEFDIRData(Convert.ToInt64(drEForm[EFORMData.ID_FIELD]), Convert.ToString(drEForm[EFORMData.COMPANYNAME_FIELD]));// + " " + Convert.ToString(drEForm[EFORMData.LIMITED_FIELD])==DBNull.Value ? string.Empty : drEForm[EFORMData.LIMITED_FIELD])));//give efromid adn comapany name
if (!Directory.Exists(strDirPath))
{
Directory.CreateDirectory(strDirPath);
}
StreamWriter swMember;
StringBuilder sb = new StringBuilder();
swMember = new StreamWriter(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EFDIR_MEMBER_FILENAME));
for (int i = 0; i < objResult.ResultData.Tables[0].Rows.Count; i++)
{
sb.Append(objResult.ResultTable.Rows[i][0].ToString());
sb.Append(Environment.NewLine);
}
sbOnFloppyMember = sb;
swMember.WriteLine(sb.ToString());
swMember.Close();
sb = null;
swMember = null;
}
}
GetOtherDirectorsData（）函数：
private void GetOtherDirectorsData()
{
EFormDetails objEFormDetails = new EFormDetails();
DataRow drEForm = objEFormDetails.ResultRow;
if (drEForm != null)
{
string strDirPath = Server.MapPath(@"Attachment/" + Session.SessionID);
eFormationResult objResult;
eFormation.Business.EFODIR objefodir = new eFormation.Business.EFODIR();
objResult = objefodir.LoadEFODIRData(Convert.ToInt64(drEForm[EFORMData.ID_FIELD]));//change
if (!Directory.Exists(strDirPath))
{
Directory.CreateDirectory(strDirPath);
}
StreamWriter swMember;
StringBuilder sb = new StringBuilder();
swMember = new StreamWriter(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EFODIR_OTHERDIRECTOR_FILENAME));
for (int i = 0; i < objResult.ResultData.Tables[0].Rows.Count; i++)
{
sb.Append(objResult.ResultTable.Rows[i][0].ToString());
sb.Append(Environment.NewLine);
}
sbOnFloppyOtherDirectors = sb;
swMember.WriteLine(sb.ToString());
swMember.Close();
sb = null;
swMember = null;
}
}
GetPackageDetails（）函数：
private void GetPackageDetails(String strBodyContent)
{
StreamWriter ef_File;
StringBuilder strFile = new StringBuilder();
ef_File = new StreamWriter(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EF_PACKAGE_FILENAME));
ef_File.WriteLine(strBodyContent);
ef_File.Close();
sbOnFloppyComp = strFile;
}
现在所有上述方法都用于创建文件。 现在，所有这些创建的文件都作为附件添加到
中MailAttachment attachment = new MailAttachment(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EF_COMP_FILENAME));
mEmailMessage.Attachments.Add(attachment);
MailAttachment attachment = new MailAttachment(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EFDIR_MEMBER_FILENAME));
mEmailMessage.Attachments.Add(attachment);
MailAttachment attachment = new MailAttachment(Server.MapPath(@"Attachment/" + Session.SessionID + @"/" + ConstantsData.EF_COST_FILENAME));
mEmailMessage.Attachments.Add(attachment);
看到任何错误？
我刚刚添加了这两行，因为电子邮件服务器现在已更改为Office 365。
mEmailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", System.Configuration.ConfigurationSettings.AppSettings["SmtpPort"]);
mEmailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", true);
答案 0 :(得分：1)
确保丢弃附件和邮件。否则锁定可能会延迟。
mail.Attachments.Dispose()
mail.Dispose()