我编写了C＃代码，使用openpop.net库从我的gmail帐户读取电子邮件，并将其保存到数据库中。一切正常，但是加载电子邮件的速度太慢了。我尝试了parallel.for循环，但出现了错误：
写方法在其他写方法运行时无法开始
在这种情况下是否可以使用并行处理？
这是我的已读电子邮件功能：
public void Read_Emails()
{
Pop3Client pop3Client;
if (Session["Pop3Client"] == null)
{
pop3Client = new Pop3Client();
pop3Client.Connect("pop.gmail.com", 995, true);
pop3Client.Authenticate(usermail, pwd, AuthenticationMethod.UsernameAndPassword);
Session["Pop3Client"] = pop3Client;
}
else
{
pop3Client = (Pop3Client)Session["Pop3Client"];
}
int count = pop3Client.GetMessageCount();
for (int i = count; i >= 1; i--)
{
Message message = pop3Client.GetMessage(i);
FFromAdress = message.Headers.From.Address;
ddate = message.Headers.DateSent;
MMessageNO = i; //message.Headers.MessageId;
List<MessagePart> attachments = message.FindAllAttachments();
DataTable dt = get_Health_Institutions();
DataTable dt1 = get_INTERIOR_Institutions();
foreach (DataRow row in dt.Rows){health_result = FFromAdress.Equals(row["mail"]);}
foreach (DataRow row in dt1.Rows){interior_result = FFromAdress.Equals(row["mail"]);}
bool result = FFromAdress.Equals("sersersetrerttrtail.com");
if (health_result == true) //|| interior_result == true)
{ SSubject = message.Headers.Subject.Split(':')[1];
MessagePart body = message.FindFirstHtmlVersion();
body = message.FindFirstPlainTextVersion();
if (body != null)
{
string BBody1 = body.GetBodyAsText();
BBody = BBody1.Replace(' ', '\n');
}
if (attachments.Count == 0)
{
atta_count = 0;
AAtachments_Path = SSubject;
if (CHKsubjectexist_Health_Date(SSubject) == 0)
{ insertmail_health_date(FFromAdress, SSubject, ddate, BBody, AAtachments_Path, MMessageNO, atta_count); }
}
else
{ for (int m = 0; m < attachments.Count; m++)
{
atta_count = attachments.Count;
if (health_result == true & interior_result == false)
{ imagename = "healthRESULT_answer" + m+".jpg"; }
Foldername = SSubject.Trim();
AAtachments_Path = Foldername;
byte[] bdata = attachments[m].Body;
string folderpathh = "d:\\asdf\\" + Foldername;
System.IO.Directory.CreateDirectory(folderpathh);
string pathh = folderpathh + "\\" + imagename;
System.IO.File.WriteAllBytes(pathh, bdata);
////write image
String st = Server.MapPath(imagename);
FileStream fs = new FileStream(st, FileMode.Create, FileAccess.Write);
fs.Write(bdata, 0, bdata.Length);
fs.Close();
}
if (CHKsubjectexist_Health_final(SSubject) == 0)
{ insertmail_Health_Final(FFromAdress, SSubject, ddate, BBody, AAtachments_Path, MMessageNO, atta_count); }
}
}
else if (interior_result == true)
{
SSubject = message.Headers.Subject.Split(':')[1];
MessagePart body = message.FindFirstHtmlVersion();
body = message.FindFirstPlainTextVersion();
if (body != null)
{
string BBody1 = body.GetBodyAsText();
BBody = BBody1.Replace(' ', '\n');
}
if (attachments.Count == 0)
{
atta_count = 0;
AAtachments_Path = SSubject;
}
else
{
for (int m = 0; m < attachments.Count; m++)
{
atta_count = attachments.Count;
imagename = "Interior_answer" + m+".jpg";
Foldername = SSubject.Trim();
AAtachments_Path = Foldername;
byte[] bdata = attachments[m].Body;
string folderpathh = "d:\\asdf\\" + Foldername;
// System.IO.Directory.CreateDirectory(folderpathh);
string pathh = folderpathh + "\\" + imagename;
System.IO.File.WriteAllBytes(pathh, bdata);
////write image
String st = Server.MapPath(imagename);
FileStream fs = new FileStream(st, FileMode.Create, FileAccess.Write);
fs.Write(bdata, 0, bdata.Length);
fs.Close();
}
}
if (CHKsubjectexist_Interior(SSubject) == 0)
{ insertmail_interior(FFromAdress, SSubject, ddate, BBody, AAtachments_Path, MMessageNO, atta_count); }
}
else if (result == true)
{
SSubject = message.Headers.Subject;
if (CHKsubjectexist(SSubject) == 0)
{
MessagePart body = message.FindFirstHtmlVersion();
if (body != null)
{
BBody = body.GetBodyAsText();
}
else
{
body = message.FindFirstPlainTextVersion();
if (body != null)
{
BBody = body.GetBodyAsText();
}
}
if (attachments.Count == 0)
{
AAtachments_Path = " ";
}
else
{
foreach (MessagePart attachment in attachments)
{
atta_count = attachments.Count;
string filenameee = attachment.FileName;
imagename = filenameee.Split('/', '/')[3];
Foldername = SSubject;
AAtachments_Path = Foldername;
byte[] bdata = attachment.Body;
string folderpathh = "d:\\asdf\\" + Foldername;
System.IO.Directory.CreateDirectory(folderpathh);
string pathh = folderpathh + "\\" + imagename;
System.IO.File.WriteAllBytes(pathh, bdata);
////write image
String st = Server.MapPath(imagename);
FileStream fs = new FileStream(st, FileMode.Create, FileAccess.Write);
fs.Write(bdata, 0, bdata.Length);
fs.Close();
}
}
if (CHKsubjectexist(SSubject) == 0)
{ insertmail(FFromAdress, SSubject, ddate, BBody, AAtachments_Path, MMessageNO, atta_count); }
}
}
}
}