Background
I'm attempting to use ServiceStack.OrmLite to grab some values (so I can cache them to run some processing against them).
I need to grab a combination of three values, and I have a custom SQL statement that will yield them (does the joins, etc.)
Because this will be a large list of combinations, I'd like to pass in some lists of values and use Sql.In to filter to only the results that have those values.
Specifics
I need to check whether an invoice is unique to a firm and another value (called ClaimLawsuitID here).
so have my poco:
public class FirmIDClaimLawsuitIDInvoiceNumberCombination
{
public string FirmID { get; set; }
public string ClaimLawsuitID { get; set; }
public string InvoiceNumber { get; set; }
}
and I have my SQL statement:
select tblDefenseInvoice.FirmID, tblDefInvClaimantDetail.ClaimLawsuitID, tblDefInvClaimantDetail.invoiceNumber
from tblDefenseInvoice
inner join tblDefInvClaimantDetail
on(tblDefenseInvoice.DefenseInvoiceID = tblDefInvClaimantDetail.DefenseInvoiceID)
I would like to run the following:
public List<FirmIDClaimLawsuitIDInvoiceNumberCombination> GetFirmIDClaimLawsuitIDInvoiceNumberCombinationsForExistingItems(IEnumerable<int> firmIds, IEnumerable<long> claimLawsuitIDs, IEnumerable<string> invoiceNumbers)
{
var sql = #"select tblDefenseInvoice.FirmID, tblDefInvClaimantDetail.ClaimLawsuitID, tblDefInvClaimantDetail.invoiceNumber
from tblDefenseInvoice
inner join tblDefInvClaimantDetail
on(tblDefenseInvoice.DefenseInvoiceID = tblDefInvClaimantDetail.DefenseInvoiceID)";
var ev = OrmLiteConfig.DialectProvider.ExpressionVisitor<tblClaimLawsuit>();
var firmFilter = PredicateBuilder.True<tblDefenseInvoice>();
var claimLawsuitFilter = PredicateBuilder.True<tblDefInvClaimantDetail>();
var invoiceNumberFilter = PredicateBuilder.True<tblDefInvClaimantDetail>();
firmFilter = x => Sql.In(x.FirmID, firmIds);
claimLawsuitFilter = x => Sql.In(x.ClaimLawsuitID, claimLawsuitIDs);
invoiceNumberFilter = x => Sql.In(x.InvoiceNumber, invoiceNumbers);
ev.Select(sql);
ev.Where(firmFilter);
ev.Where(claimLawsuitFilter);
ev.Where(invoiceNumberFilter);
return dal.DB.Select<FirmIDClaimLawsuitIDInvoiceNumberCombination>(ev.ToSelectStatement());
}
Question
Is this possible to achieve this way?
Is there some other way of achieving this within ServiceStack's OrmLite that is cleaner and I'm unaware of?
Since I was selecting to a POCO, I simply needed to add the filters based on that POCO.
The following worked just fine:
public List<FirmIDClaimLawsuitIDInvoiceNumberCombination>
GetFirmIDClaimLawsuitIDInvoiceNumberCombinationsForExistingItems(
IEnumerable<long> firmIds,
IEnumerable<long> claimLawsuitIDs)
{
var sql = #"select tblDefenseInvoice.FirmID, tblDefInvClaimantDetail.ClaimLawsuitID, tblDefInvClaimantDetail.invoiceNumber
from tblDefenseInvoice
inner join tblDefInvClaimantDetail
on(tblDefenseInvoice.DefenseInvoiceID = tblDefInvClaimantDetail.DefenseInvoiceID)";
var ev = OrmLiteConfig.DialectProvider.ExpressionVisitor<FirmIDClaimLawsuitIDInvoiceNumberCombination>();
var firmFilter = PredicateBuilder.True<FirmIDClaimLawsuitIDInvoiceNumberCombination>();
var claimLawsuitFilter = PredicateBuilder.True<FirmIDClaimLawsuitIDInvoiceNumberCombination>();
firmFilter = x => Sql.In(x.FirmID, firmIds);
claimLawsuitFilter = x => Sql.In(x.ClaimLawsuitID, claimLawsuitIDs);
ev.Select(sql);
ev.Where(firmFilter);
ev.Where(claimLawsuitFilter);
return dal.DB.Select<FirmIDClaimLawsuitIDInvoiceNumberCombination>(ev.ToSelectStatement());
}
I had a hard time to come up with a title for this :)
I've got a WCF service hooked up to a SQL-server database. I retrieve data from the DB using ADO.NET.
On some simple operations I just retrieve from the DB and then send back a json representation of the EntityObjects i just fetched which works fine. However now I'm doing a more complex fetch with a procedure. The data retrieval works fine but the procdure itself returns more columns than the actual EntityObject (Table) has. Take this for an example:
create table Person
{
Name,
BirthDate
}
// Retrieve Persons from DB with procedure that also calculates each persons actual age!
public List<EntityObject> GetPersons()
{
var personList = new List<EntityObject>();
var dataSet = dbContext.ExceuteProcedure("GET_PERSONS_WITH_AGE", parameters);
var dataTable = dataSet.Tables["result"];
foreach (DataRow row in dataTable.Rows)
{
personList.Add( new PersonEntity
{
Name = (String)row["Name"],
BirthDate = (DateTime)row["BirthDate"],
// Here i want the actual age calculation result, but since the DB-table Person does'nt have this column,
// I can't set it.
}
}
return personList;
}
Do I need to create a CustomPersonClass for this which has this extra variable? Or can I somehow force another column into Table Person in my ADO.NET object?
Please consider that I'm novice about ADO.NET, if you see other code faults in my example (regarding methods of retrival as well) please let me know.
You may consider a DTO here, a data transfer object, this addresses the considerations of the caller/client of getPersons and will be generated as JSON back to the client. Call it PersonDTO or PersonResponse. It lives in the same class as the getPersons() method and is a public class. Change the signature to of getPersons() to List<PersonDTO> getPersons(). I would also captialize GetPersons() as it is a public method.
public class PersonDTO
{
property string Name;
property string BirthDate;
property string Age;
}
// Retrieve Persons from DB with procedure that also calculates each persons actual age!
public List<PersonDTO> getPersons()
{
var personList = new List<PersonDTO>();
var dataSet = dbContext.ExceuteProcedure("GET_PERSONS_WITH_AGE", parameters);
var dataTable = dataSet.Tables["result"];
foreach (DataRow row in dataTable.Rows)
{
personList.Add( new PersonDTO
{
Name = (String)row["Name"],
BirthDate = (DateTime)row["BirthDate"],
// Here i want the actual age calculation result, but since the DB-table Person does'nt have this column,
// I can't set it.
}
}
return personList;
}
It looks like NH gets MAX(ID) only once, at first insert and then stores this value internally, this causes me some problems when other processes inserts data. Then I have not actual ID and duplicate key exception is thrown.
Lets imagine we have table Cats
CREATE TABLE Cats(ID int, Name varchar(25))
Then we have corresponding mapping done with FluentNhibernate
public class CatMap : ClassMap<Cat>
{
public CatMap()
{
Id(m=>m.ID).GeneratedBy.Increment();
Map(m=>.Name);
}
}
All I want to achieve is to insert my Cat records with ID's generated by NHibernate using SELECT MAX(ID) FROM Cats before any insert. Executing Session.Flush after any commit dosnt work. I'v done some investigation using SQL Server profiler, and this sql stetement is executed only once (at first insert) - other inserts doesnt force to retreive actual MAX(ID). I know that other algorithms like HiLo are better, but I cant replace it.
As you found out, the NHibernate Increment id generator was not intended for use in a multi-user environment. You state that using a HiLo generator is not an option so you're left with these options:
use the Native generator and change the id column to use the database supported identity mechanism
use the Assigned generator and write code to determine the next valid id
create a Custom generator where you implement the IIdentifierGenerator interface to do what you need
Below is sample code for a custom generator that uses a generalized proc to get an ID for a given table. The main issue with this approach is that you must wrap the code in something like a Unit of Work pattern to ensure the 'select max(id) ..." and the insert are covered by the same database transaction. The IIdentifierGenerator link has the XML mapping you need to wire up this custom generator.
using System;
using System.Collections.Generic;
using System.Data;
using NHibernate.Dialect;
using NHibernate.Engine;
using NHibernate.Id;
using NHibernate.Persister.Entity;
using NHibernate.Type;
namespace YourCompany.Stuff
{
public class IdGenerator : IIdentifierGenerator, IConfigurable
{
private string _tableName;
// The "select max(id) ..." query will go into this proc:
private const string DefaultProcedureName = "dbo.getId";
public string ProcedureName { get; protected set; }
public string TableNameParameter { get; protected set; }
public string OutputParameter { get; protected set; }
public IdGenerator()
{
ProcedureName = DefaultProcedureName;
TableNameParameter = "#tableName";
OutputParameter = "#newID";
}
public object Generate(ISessionImplementor session, object obj)
{
int newId;
using (var command = session.Connection.CreateCommand())
{
var tableName = GetTableName(session, obj.GetType());
command.CommandType = CommandType.StoredProcedure;
command.CommandText = ProcedureName;
// Set input parameters
var parm = command.CreateParameter();
parm.Value = tableName;
parm.ParameterName = TableNameParameter;
parm.DbType = DbType.String;
command.Parameters.Add(parm);
// Set output parameter
var outputParameter = command.CreateParameter();
outputParameter.Direction = ParameterDirection.Output;
outputParameter.ParameterName = OutputParameter;
outputParameter.DbType = DbType.Int32;
command.Parameters.Add(outputParameter);
// Execute the stored procedure
command.ExecuteNonQuery();
var id = (IDbDataParameter)command.Parameters[OutputParameter];
newId = int.Parse(id.Value.ToString());
if (newId < 1)
throw new InvalidOperationException(
string.Format("Could not retrieve a new ID with proc {0} for table {1}",
ProcedureName,
tableName));
}
return newId;
}
public void Configure(IType type, IDictionary<string, string> parms, Dialect dialect)
{
_tableName = parms["TableName"];
}
private string GetTableName(ISessionImplementor session, Type objectType)
{
if (string.IsNullOrEmpty(_tableName))
{
//Not set by configuration, default to the mapped table of the actual type from runtime object:
var persister = (IJoinable)session.Factory.GetClassMetadata(objectType);
var qualifiedTableName = persister.TableName.Split('.');
_tableName = qualifiedTableName[qualifiedTableName.GetUpperBound(0)]; //Get last string
}
return _tableName;
}
}
}
Here's the table
Users
UserId
UserName
Password
EmailAddress
and the code..
public void ChangePassword(int userId, string password){
//code to update the password..
}
Ladislav's answer updated to use DbContext (introduced in EF 4.1):
public void ChangePassword(int userId, string password)
{
var user = new User() { Id = userId, Password = password };
using (var db = new MyEfContextName())
{
db.Users.Attach(user);
db.Entry(user).Property(x => x.Password).IsModified = true;
db.SaveChanges();
}
}
You can tell entity-framework which properties have to be updated in this way:
public void ChangePassword(int userId, string password)
{
var user = new User { Id = userId, Password = password };
using (var context = new ObjectContext(ConnectionString))
{
var users = context.CreateObjectSet<User>();
users.Attach(user);
context.ObjectStateManager.GetObjectStateEntry(user)
.SetModifiedProperty("Password");
context.SaveChanges();
}
}
In Entity Framework Core, Attach returns the entry, so all you need is:
var user = new User { Id = userId, Password = password };
db.Users.Attach(user).Property(x => x.Password).IsModified = true;
db.SaveChanges();
You have basically two options:
go the EF way all the way, in that case, you would
load the object based on the userId provided - the entire object gets loaded
update the password field
save the object back using the context's .SaveChanges() method
In this case, it's up to EF how to handle this in detail. I just tested this, and in the case I only change a single field of an object, what EF creates is pretty much what you'd create manually, too - something like:
`UPDATE dbo.Users SET Password = #Password WHERE UserId = #UserId`
So EF is smart enough to figure out what columns have indeed changed, and it will create a T-SQL statement to handle just those updates that are in fact necessary.
you define a stored procedure that does exactly what you need, in T-SQL code (just update the Password column for the given UserId and nothing else - basically executes UPDATE dbo.Users SET Password = #Password WHERE UserId = #UserId) and you create a function import for that stored procedure in your EF model and you call this function instead of doing the steps outlined above
i'm using this:
entity:
public class Thing
{
[Key]
public int Id { get; set; }
public string Info { get; set; }
public string OtherStuff { get; set; }
}
dbcontext:
public class MyDataContext : DbContext
{
public DbSet<Thing > Things { get; set; }
}
accessor code:
MyDataContext ctx = new MyDataContext();
// FIRST create a blank object
Thing thing = ctx.Things.Create();
// SECOND set the ID
thing.Id = id;
// THIRD attach the thing (id is not marked as modified)
db.Things.Attach(thing);
// FOURTH set the fields you want updated.
thing.OtherStuff = "only want this field updated.";
// FIFTH save that thing
db.SaveChanges();
While searching for a solution to this problem, I found a variation on GONeale's answer through Patrick Desjardins' blog:
public int Update(T entity, Expression<Func<T, object>>[] properties)
{
DatabaseContext.Entry(entity).State = EntityState.Unchanged;
foreach (var property in properties)
{
var propertyName = ExpressionHelper.GetExpressionText(property);
DatabaseContext.Entry(entity).Property(propertyName).IsModified = true;
}
return DatabaseContext.SaveChangesWithoutValidation();
}
"As you can see, it takes as its second parameter an expression of a
function. This will let use this method by specifying in a Lambda
expression which property to update."
...Update(Model, d=>d.Name);
//or
...Update(Model, d=>d.Name, d=>d.SecondProperty, d=>d.AndSoOn);
( A somewhat similar solution is also given here: https://stackoverflow.com/a/5749469/2115384 )
The method I am currently using in my own code, extended to handle also (Linq) Expressions of type ExpressionType.Convert. This was necessary in my case, for example with Guid and other object properties. Those were 'wrapped' in a Convert() and therefore not handled by System.Web.Mvc.ExpressionHelper.GetExpressionText.
public int Update(T entity, Expression<Func<T, object>>[] properties)
{
DbEntityEntry<T> entry = dataContext.Entry(entity);
entry.State = EntityState.Unchanged;
foreach (var property in properties)
{
string propertyName = "";
Expression bodyExpression = property.Body;
if (bodyExpression.NodeType == ExpressionType.Convert && bodyExpression is UnaryExpression)
{
Expression operand = ((UnaryExpression)property.Body).Operand;
propertyName = ((MemberExpression)operand).Member.Name;
}
else
{
propertyName = System.Web.Mvc.ExpressionHelper.GetExpressionText(property);
}
entry.Property(propertyName).IsModified = true;
}
dataContext.Configuration.ValidateOnSaveEnabled = false;
return dataContext.SaveChanges();
}
New EF Core 7 native feature — ExecuteUpdate:
Finally! After a long wait, EF Core 7.0 now has a natively supported way to run UPDATE (and also DELETE) statements while also allowing you to use arbitrary LINQ queries (.Where(u => ...)), without having to first retrieve the relevant entities from the database: The new built-in method called ExecuteUpdate — see "What's new in EF Core 7.0?".
ExecuteUpdate is precisely meant for these kinds of scenarios, it can operate on any IQueryable instance, and lets you update specific columns on any number of rows, while always issuing a single UPDATE statement behind the scenes, making it as efficient as possible.
Usage:
Let's take OP's example — i.e. updating the password column of a specific user:
dbContext.Users
.Where(u => u.Id == someId)
.ExecuteUpdate(b =>
b.SetProperty(u => u.Password, "NewPassword")
);
As you can see, calling ExecuteUpdate requires you to make calls to the SetProperty method, to specify which property to update, and also what new value to assign to it.
EF Core will translate this into the following UPDATE statement:
UPDATE [u]
SET [u].[Password] = "NewPassword"
FROM [Users] AS [u]
WHERE [u].[Id] = someId
Also, ExecuteDelete for deleting rows:
There's also a counterpart to ExecuteUpdate called ExecuteDelete, which, as the name implies, can be used to delete a single or multiple rows at once without having to first fetch them.
Usage:
// Delete users that haven't been active in 2022:
dbContext.Users
.Where(u => u.LastActiveAt.Year < 2022)
.ExecuteDelete();
Similar to ExecuteUpdate, ExecuteDelete will generate DELETE SQL statements behind the scenes — in this case, the following one:
DELETE FROM [u]
FROM [Users] AS [u]
WHERE DATEPART(year, [u].[LastActiveAt]) < 2022
Other notes:
Keep in mind that both ExecuteUpdate and ExecuteDelete are "terminating", meaning that the update/delete operation will take place as soon as you call the method. You're not supposed to call dbContext.SaveChanges() afterwards.
If you're curious about the SetProperty method, and you're confused as to why ExectueUpdate doesn't instead receive a member initialization expression (e.g. .ExecuteUpdate(new User { Email = "..." }), then refer to this comment (and the surrounding ones) on the GitHub issue for this feature.
Furthermore, if you're curious about the rationale behind the naming, and why the prefix Execute was picked (there were also other candidates), refer to this comment, and the preceding (rather long) conversation.
Both methods also have async equivalents, named ExecuteUpdateAsync, and ExecuteDeleteAsync respectively.
In EntityFramework Core 2.x there is no need for Attach:
// get a tracked entity
var entity = context.User.Find(userId);
entity.someProp = someValue;
// other property changes might come here
context.SaveChanges();
Tried this in SQL Server and profiling it:
exec sp_executesql N'SET NOCOUNT ON;
UPDATE [User] SET [someProp] = #p0
WHERE [UserId] = #p1;
SELECT ##ROWCOUNT;
',N'#p1 int,#p0 bit',#p1=1223424,#p0=1
Find ensures that already loaded entities do not trigger a SELECT and also automatically attaches the entity if needed (from the docs):
Finds an entity with the given primary key values. If an entity with the given primary key values is being tracked by the context, then it is returned immediately without making a request to the database. Otherwise, a query is made to the database for an entity with the given primary key values and this entity, if found, is attached to the context and returned. If no entity is found, then null is returned.
I'm late to the game here, but this is how I am doing it, I spent a while hunting for a solution I was satisified with; this produces an UPDATE statement ONLY for the fields that are changed, as you explicitly define what they are through a "white list" concept which is more secure to prevent web form injection anyway.
An excerpt from my ISession data repository:
public bool Update<T>(T item, params string[] changedPropertyNames) where T
: class, new()
{
_context.Set<T>().Attach(item);
foreach (var propertyName in changedPropertyNames)
{
// If we can't find the property, this line wil throw an exception,
//which is good as we want to know about it
_context.Entry(item).Property(propertyName).IsModified = true;
}
return true;
}
This could be wrapped in a try..catch if you so wished, but I personally like my caller to know about the exceptions in this scenario.
It would be called in something like this fashion (for me, this was via an ASP.NET Web API):
if (!session.Update(franchiseViewModel.Franchise, new[]
{
"Name",
"StartDate"
}))
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
Entity framework tracks your changes on objects that you queried from database via DbContext. For example if you DbContext instance name is dbContext
public void ChangePassword(int userId, string password){
var user = dbContext.Users.FirstOrDefault(u=>u.UserId == userId);
user.password = password;
dbContext.SaveChanges();
}
I know this is an old thread but I was also looking for a similar solution and decided to go with the solution #Doku-so provided. I'm commenting to answer the question asked by #Imran Rizvi , I followed #Doku-so link that shows a similar implementation. #Imran Rizvi's question was that he was getting an error using the provided solution 'Cannot convert Lambda expression to Type 'Expression> [] ' because it is not a delegate type'. I wanted to offer a small modification I made to #Doku-so's solution that fixes this error in case anyone else comes across this post and decides to use #Doku-so's solution.
The issue is the second argument in the Update method,
public int Update(T entity, Expression<Func<T, object>>[] properties).
To call this method using the syntax provided...
Update(Model, d=>d.Name, d=>d.SecondProperty, d=>d.AndSoOn);
You must add the 'params' keyword in front of the second arugment as so.
public int Update(T entity, params Expression<Func<T, object>>[] properties)
or if you don't want to change the method signature then to call the Update method you need to add the 'new' keyword, specify the size of the array, then finally use the collection object initializer syntax for each property to update as seen below.
Update(Model, new Expression<Func<T, object>>[3] { d=>d.Name }, { d=>d.SecondProperty }, { d=>d.AndSoOn });
In #Doku-so's example he is specifying an array of Expressions so you must pass the properties to update in an array, because of the array you must also specify the size of the array. To avoid this you could also change the expression argument to use IEnumerable instead of an array.
Here is my implementation of #Doku-so's solution.
public int Update<TEntity>(LcmsEntities dataContext, DbEntityEntry<TEntity> entityEntry, params Expression<Func<TEntity, object>>[] properties)
where TEntity: class
{
entityEntry.State = System.Data.Entity.EntityState.Unchanged;
properties.ToList()
.ForEach((property) =>
{
var propertyName = string.Empty;
var bodyExpression = property.Body;
if (bodyExpression.NodeType == ExpressionType.Convert
&& bodyExpression is UnaryExpression)
{
Expression operand = ((UnaryExpression)property.Body).Operand;
propertyName = ((MemberExpression)operand).Member.Name;
}
else
{
propertyName = System.Web.Mvc.ExpressionHelper.GetExpressionText(property);
}
entityEntry.Property(propertyName).IsModified = true;
});
dataContext.Configuration.ValidateOnSaveEnabled = false;
return dataContext.SaveChanges();
}
Usage:
this.Update<Contact>(context, context.Entry(modifiedContact), c => c.Active, c => c.ContactTypeId);
#Doku-so provided a cool approach using generic's, I used the concept to solve my issue but you just can't use #Doku-so's solution as is and in both this post and the linked post no one answered the usage error questions.
Combining several suggestions I propose the following:
async Task<bool> UpdateDbEntryAsync<T>(T entity, params Expression<Func<T, object>>[] properties) where T : class
{
try
{
var entry = db.Entry(entity);
db.Set<T>().Attach(entity);
foreach (var property in properties)
entry.Property(property).IsModified = true;
await db.SaveChangesAsync();
return true;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("UpdateDbEntryAsync exception: " + ex.Message);
return false;
}
}
called by
UpdateDbEntryAsync(dbc, d => d.Property1);//, d => d.Property2, d => d.Property3, etc. etc.);
Or by
await UpdateDbEntryAsync(dbc, d => d.Property1);
Or by
bool b = UpdateDbEntryAsync(dbc, d => d.Property1).Result;
I use ValueInjecter nuget to inject Binding Model into database Entity using following:
public async Task<IHttpActionResult> Add(CustomBindingModel model)
{
var entity= await db.MyEntities.FindAsync(model.Id);
if (entity== null) return NotFound();
entity.InjectFrom<NoNullsInjection>(model);
await db.SaveChangesAsync();
return Ok();
}
Notice the usage of custom convention that doesn't update Properties if they're null from server.
ValueInjecter v3+
public class NoNullsInjection : LoopInjection
{
protected override void SetValue(object source, object target, PropertyInfo sp, PropertyInfo tp)
{
if (sp.GetValue(source) == null) return;
base.SetValue(source, target, sp, tp);
}
}
Usage:
target.InjectFrom<NoNullsInjection>(source);
Value Injecter V2
Lookup this answer
Caveat
You won't know whether the property is intentionally cleared to null OR it just didn't have any value it. In other words, the property value can only be replaced with another value but not cleared.
_context.Users.UpdateProperty(p => p.Id, request.UserId, new UpdateWrapper<User>()
{
Expression = p => p.FcmId,Value = request.FcmId
});
await _context.SaveChangesAsync(cancellationToken);
Update Property is an extension method
public static void UpdateProperty<T, T2>(this DbSet<T> set, Expression<Func<T, T2>> idExpression,
T2 idValue,
params UpdateWrapper<T>[] updateValues)
where T : class, new()
{
var entity = new T();
var attach = set.Attach(entity);
attach.Property(idExpression).IsModified = false;
attach.Property(idExpression).OriginalValue = idValue;
foreach (var update in updateValues)
{
attach.Property(update.Expression).IsModified = true;
attach.Property(update.Expression).CurrentValue = update.Value;
}
}
And Update Wrapper is a class
public class UpdateWrapper<T>
{
public Expression<Func<T, object>> Expression { get; set; }
public object Value { get; set; }
}
I was looking for same and finally I found the solution
using (CString conn = new CString())
{
USER user = conn.USERs.Find(CMN.CurrentUser.ID);
user.PASSWORD = txtPass.Text;
conn.SaveChanges();
}
believe me it work for me like a charm.
public async Task<bool> UpdateDbEntryAsync(TEntity entity, params Expression<Func<TEntity, object>>[] properties)
{
try
{
this.Context.Set<TEntity>().Attach(entity);
EntityEntry<TEntity> entry = this.Context.Entry(entity);
entry.State = EntityState.Modified;
foreach (var property in properties)
entry.Property(property).IsModified = true;
await this.Context.SaveChangesAsync();
return true;
}
catch (Exception ex)
{
throw ex;
}
}
public void ChangePassword(int userId, string password)
{
var user = new User{ Id = userId, Password = password };
using (var db = new DbContextName())
{
db.Entry(user).State = EntityState.Added;
db.SaveChanges();
}
}