我在实体框架中使用存储库模式和工作单元，在尝试插入数据列表时遇到性能问题。
这是我的代码
var CurrentVersion = GlobalMethods.GetVersion(dFactory);
var importedData = await GetImportData();
_uow.BeginTransaction();
try
{
foreach (var item in importedData)
{
Account accountData = new Account()
{
AccountSiebelCode = item.account_code,
AccountName = item.account_name,
AccountZip = "",
CountryID = 1,
AccountRegistration = "",//null allowed
AccountDisabled = item.account_status != "active" ? true : false,
TMID = 0, //Trademark Id
AccountAreaNr = "",
Audit_User = User.Identity.Name,
VersionDataID = CurrentVersion.Item2,
VersionAction = "",//Set at Business
TokenKey = GlobalMethods.GetTokenAsync().Result
};
//string contactUserName = "";
string contactUserName = item.last_name.Replace(" ", "").Count() > 4 ? item.last_name.Replace(" ", "").Substring(0, 4) : item.last_name.Replace(" ", "");
contactUserName += item.first_name.Substring(0, 1).ToString();
Microsoft.AspNet.Identity.PasswordHasher haspwd= new Microsoft.AspNet.Identity.PasswordHasher();
Contact contactData = new Contact()
{
ContactSiebelCode = item.account_code,
AccountID = 0, //Account Id
ContactFirstName = item.first_name,
ContactLastName = item.last_name,
ContactTitle = "",
ContactType = "",
ContactDOB = DateTime.Now, // Dob
ContactEmail = item.email,
ContactMobile = "",
ContactPhone = item.phonenumber,
ContactDisabled = false, //contact disabled
ContactAppEnabled = true, //contact app enabled
UserName = contactUserName, //username
//PasswordHash = BCryptEncryption.Encrypt("Gr@fi0ffshore"), //password
//PasswordHash = haspwd.HashPassword("Gr@fi0ffshore"), //password
PasswordHash ="R1-"+ System.Web.Security.Membership.GeneratePassword(6,1), //password
PinCode = "1234", //picode
LockOutEnabled = false, //lockout
AccessFailedCount = 0, //accessfailedcount
Audit_User = User.Identity.Name,
VersionDataID = CurrentVersion.Item2,
VersionAction = "",//Set at Business
TokenKey = GlobalMethods.GetTokenAsync().Result
};
TradeMarketer tradeMarketerData = new TradeMarketer()
{
TMSiebelCode = item.account_code,
TMFirstName = item.trade_marketeer_firstname,
TMLastName = item.trade_marketeer_lastname,
TMEmail = "",
TMAreaNr = item.region,
CountryID = 1, //country id
Audit_User = User.Identity.Name,
VersionDataId = CurrentVersion.Item2,
VersionAction = "",//Set at Business
TokeyKey = GlobalMethods.GetTokenAsync().Result
};
_biznessTradeMarketer.Save(tradeMarketerData);
_uow.SaveChanges();
accountData.TMID = tradeMarketerData.TMID;
_biznessAccount.Save(accountData);
_uow.SaveChanges();
contactData.AccountID = accountData.AccountID;
_biznessContact.Save(contactData);
_uow.SaveChanges();
}
_uow.Commit();
}
catch (Exception ex)
{
_uow.Rollback();
ModelState.AddModelError("", ex.InnerException);
}
在上面的情况下，为了在importedData对象中插入或更新450行，似乎需要40到50秒。如果我不执行savechanges（）等数据库操作，操作将在几秒钟内完成。如何在这种情况下提高性能。感谢
答案 0 :(得分：3)
尝试不在_uow.SaveChanges();循环内调用foreach。在_uow.Commit();之前做到。
var CurrentVersion = GlobalMethods.GetVersion(dFactory);
var importedData = await GetImportData();
_uow.BeginTransaction();
try
{
foreach (var item in importedData)
{
Account accountData = new Account()
{
AccountSiebelCode = item.account_code,
AccountName = item.account_name,
AccountZip = "",
CountryID = 1,
AccountRegistration = "",//null allowed
AccountDisabled = item.account_status != "active" ? true : false,
TMID = 0, //Trademark Id
AccountAreaNr = "",
Audit_User = User.Identity.Name,
VersionDataID = CurrentVersion.Item2,
VersionAction = "",//Set at Business
TokenKey = GlobalMethods.GetTokenAsync().Result
};
//string contactUserName = "";
string contactUserName = item.last_name.Replace(" ", "").Count() > 4 ? item.last_name.Replace(" ", "").Substring(0, 4) : item.last_name.Replace(" ", "");
contactUserName += item.first_name.Substring(0, 1).ToString();
Microsoft.AspNet.Identity.PasswordHasher haspwd= new Microsoft.AspNet.Identity.PasswordHasher();
Contact contactData = new Contact()
{
ContactSiebelCode = item.account_code,
AccountID = 0, //Account Id
ContactFirstName = item.first_name,
ContactLastName = item.last_name,
ContactTitle = "",
ContactType = "",
ContactDOB = DateTime.Now, // Dob
ContactEmail = item.email,
ContactMobile = "",
ContactPhone = item.phonenumber,
ContactDisabled = false, //contact disabled
ContactAppEnabled = true, //contact app enabled
UserName = contactUserName, //username
//PasswordHash = BCryptEncryption.Encrypt("Gr@fi0ffshore"), //password
//PasswordHash = haspwd.HashPassword("Gr@fi0ffshore"), //password
PasswordHash ="R1-"+ System.Web.Security.Membership.GeneratePassword(6,1), //password
PinCode = "1234", //picode
LockOutEnabled = false, //lockout
AccessFailedCount = 0, //accessfailedcount
Audit_User = User.Identity.Name,
VersionDataID = CurrentVersion.Item2,
VersionAction = "",//Set at Business
TokenKey = GlobalMethods.GetTokenAsync().Result
};
TradeMarketer tradeMarketerData = new TradeMarketer()
{
TMSiebelCode = item.account_code,
TMFirstName = item.trade_marketeer_firstname,
TMLastName = item.trade_marketeer_lastname,
TMEmail = "",
TMAreaNr = item.region,
CountryID = 1, //country id
Audit_User = User.Identity.Name,
VersionDataId = CurrentVersion.Item2,
VersionAction = "",//Set at Business
TokeyKey = GlobalMethods.GetTokenAsync().Result
};
_biznessTradeMarketer.Save(tradeMarketerData);
accountData.TMID = tradeMarketerData.TMID;
_biznessAccount.Save(accountData);
contactData.AccountID = accountData.AccountID;
_biznessContact.Save(contactData);
}
_uow.SaveChanges();
_uow.Commit();
}
catch (Exception ex)
{
_uow.Rollback();
ModelState.AddModelError("", ex.InnerException);
}