I am trying to implement simple membership in my application. My problem is that I want to be able to display the data in the userprofile table for the current user but I dont know how to select it from the DB
I have tried this but I am getting an error:
UserProfile UserP = new UserProfile();
ViewBag.Message = User.Identity.Name;
return View();
UserP = (from r in up.UserName
where up.UserName == User.Identity.Name.ToString()
select r).ToList().FirstOrDefault();
return View(UserP);
Here is the error:
Error 1 Cannot implicitly convert type 'char' to 'MvcApplication5.Models.UserProfile' C:\Users\user\Desktop\MvcApplication5\MvcApplication5\Controllers\HomeController.cs 31 32 MvcApplication5
If I got you right (your code is little bit broken, it has two returns, so I assume there is just two pieces of code), try this:
UserP = (from r in up
where up.UserName == User.Identity.Name.ToString()
select r).FirstOrDefault();
Just get rid of up.UserName in your query. ToList() is also not needed.
P.S. For the future:
I also suggest you adding another column called LoweredUserName and perform checking in the following way:
where up.LoweredUserName == User.Identity.Name.ToString().ToLower()
Here is how you can access the UserProfile.
var context = new UsersContext();
var username = User.Identity.Name;
var user = context.UserProfiles.SingleOrDefault(u => u.UserName == username);
return View(user);
For more on customizing the UserProfile and accessing it read this article.
Related
I have a nopcommerce website. I find a problem. Please see below code
// My account / Order details page
[HttpsRequirement(SslRequirement.Yes)]
public virtual IActionResult Details(int orderId)
{
var order = _orderService.GetOrderById(orderId);
if (order == null || order.Deleted || _workContext.CurrentCustomer.Id != order.CustomerId)
return Challenge();
var orderTotal = order.OrderTotal;
order = _orderService.GetOrderById(orderId);
var orderTotal2 = order.OrderTotal;
var model = _orderModelFactory.PrepareOrderDetailsModel(order);
return View(model);
}
When I put a breakpoint on
var orderTotal = order.OrderTotal;
I get the value (100) of orderTotal from table Order. Then I changed the value of orderTotal from 100 to 200 in the database, and continue to execute the code.
order = _orderService.GetOrderById(orderId);
var orderTotal2 = order.OrderTotal;
This code should get the new value (200) of orderTotal from the table Order, however, it still returns a value of 100 for orderTotal2.
I want to get the refreshed data in function in the controller. Could you help me solve this problem?
Because the GetOrderById Method retrieves the cached order in the memory using 'ToCachedGetById', you can use GetOrderByGuid method instead to get the order directly from DB and skip the caching order
I did raw SQL query below to select only certain fields from a table.
{
List<CustEmpVM> CustomerVMlist = new List<CustEmpVM>();
var cid = db.Customers.SqlQuery("select SchedDate from Customer where CustID = '#id'").ToList<Customer>();
}
But i keep getting the error of:
System.Data.Entity.Core.EntityCommandExecutionException occurred in EntityFramework.SqlServer.dll but was not handled in user code
Additional information: The data reader is incompatible with the specified ALFHomeMovers.Customer. A member of the type, CustID, does not have a corresponding column in the data reader with the same name.
The exception message is pretty straightforward: the query expected to return full entity of Customer table but only SchedDate column returned, hence EF cannot done mapping other omitted columns including CustID.
Assuming Customers is a DbSet<Customer>, try return all fields from Customer instead:
// don't forget to include SqlParameter
var cid = db.Customers.SqlQuery("SELECT * FROM Customer WHERE CustID = #id",
new SqlParameter("id", "[customer_id]")).ToList();
If you want just returning SchedDate column, materialize query results and use Select afterwards:
var cid = db.Customers.SqlQuery("SELECT * FROM Customer WHERE CustID = #id",
new SqlParameter("id", "[customer_id]"))
.AsEnumerable().Select(x => x.SchedDate).ToList();
NB: I think you can construct LINQ based from the SELECT query above:
var cid = (from c in db.Customers
where c.CustID == "[customer_id]"
select c.SchedDate).ToList();
Similar issue:
The data reader is incompatible with the specified Entity Framework
Use below query instead of raw query:
{
List<CustEmpVM> CustomerVMlist = new List<CustEmpVM>();
var cid = db.Customers.Where(w=>w.Id == YOURCUSTOMERID).Select(s=>new Customer{SchedDate = s.SchedDate }).ToList();
}
It will give compile time error rather than run time error.
I am trying to extract the [key] value from a table.
This is for a logging method which looks like this:
private List<Log> GetAuditRecordsForChange(DbEntityEntry dbEntry, string userId)
{
List<Log> result = new List<Log>();
DateTime changeTime = DateTime.Now;
// Get the Table() attribute, if one exists
TableAttribute tableAttr = dbEntry.Entity.GetType().GetCustomAttributes(typeof(TableAttribute), false).SingleOrDefault() as TableAttribute;
// Get table name (if it has a Table attribute, use that, otherwise get the pluralized name)
string tableName = tableAttr != null ? tableAttr.Name : dbEntry.Entity.GetType().Name;
// Get primary key value
string keyName = dbEntry.Entity.GetType().GetProperties().Single(p => p.GetCustomAttributes(typeof(KeyAttribute), false).Count() > 0).Name;
if (dbEntry.State == EntityState.Added)
{
result.Add(new Log()
{
LogID = Guid.NewGuid(),
EventType = "A", // Added
TableName = tableName,
RecordID = dbEntry.CurrentValues.GetValue<object>(keyName).ToString(),
ColumnName = "*ALL",
NewValue = (dbEntry.CurrentValues.ToObject() is IDescribableEntity) ? (dbEntry.CurrentValues.ToObject() as IDescribableEntity).Describe() : dbEntry.CurrentValues.ToObject().ToString(),
Created_by = userId,
Created_date = changeTime
}
);
}
The problem is to get the RecordID when a Record is added, when it get deleted or modified it works. (The code to get it is the same)
When I debug I also see that it has the KeyAttribute in the CustomAttributes base but not sure why it always shows up as 0.
I can debug more if needed
After savechanges you can fetch the newly created key. (Guess the key is generated automatically inserting a new record).
for me you have several solutions.
first solution:
enlist added entity from the context
SaveChanges
enumerate the enlisted entities to add log
SaveChanges
the problem (or not) here is that the business and the logging are not in the same transaction.
antother problem, depending on the implementation, is to prevent loging of log of log of log... This can be donne by filtering entities by typeName for example.
other solution:
add and ICollection<Log> to your entities.
the problem here is to unify the logs:
inheritance of entity, or
several log tables + a view
...
other solution
use trigger at database level
other solution
..., use cdc if you have Sql Server Enterprise Edition
Few days back I put a question regarding mapping two classes Message and MessageStatusHistory using EF. The mapping is going fine but I am facing some problems with the navigation property StatusHistory in class Message that relates it to MessageStatusHistory objects. I am loading the messages for one user only and want to the statuses pertaining to that user only. Like I would want to show if the user has marked message as read/not-read and when. If I use default loading mechanism like following it loads all the history related to the message irrespective of the user:
IDbSet<Message> dbs = _repo.DbSet;
dbs.Include("StatusHistory").Where(x=>x.MessageIdentifier == msgIdentifier);
To filter history for one user only I tried following trick:
IDbSet<Message> dbs = _repo.DbSet;
var q = from m in dbs.Include("StatusHistory")
where m.MessageIdentifier == msgIdentifier
select new Message
{
MessageIdentifier = m.MessageIdentifier,
/*OTHER PROPERTIES*/
StatusHistory = m.StatusHistory
.Where(x => x.UserId == userId).ToList()
};
return q.ToList();//THROWING ERROR ON THIS LINE
I am getting the error:
The entity or complex type 'MyLib.Biz.Message' cannot be constructed in a LINQ
to Entities query.
I have tried by commenting StatusHistory = m.StatusHistory.Where(x => x.UserId == userId).ToList() also but it has not helped.
Please help me in getting Messages with filtered StatusHistory.
EDIT:- above is resolved with this code:
var q = from m in _repository.DBSet.Include("Histories")
where m.MessageIdentifier == id
select new {
m.Id,/*OTHER PROPERTIES*/
Histories = m.Histories.Where(x =>
x.SenderId == userId).ToList()
};
var lst = q.ToList();
return lst.Select(m => new Message{
Id = m.Id, MessageIdentifier = m.MessageIdentifier,
MessageText = m.MessageText, Replies = m.Replies,
ReplyTo = m.ReplyTo, Histories = m.Histories, SenderId =
m.SenderId, SenderName = m.SenderName, CreatedOn = m.CreatedOn
}).ToList();
But if I try to include replies to the message with:
from m in _repository.DBSet.Include("Replies").Include("Histories")
I am getting error on converting query to List with q.ToList() for Histories = m.Histories.Where(x=> x.SenderId == userId).ToList().
About your EDIT part: You cannot use ToList() in a projection, just leave it an IEnumerable<T> and convert to a List<T> when you construct the Message. You also don't need to create two list objects, you can switch from the LINQ to Entities query to LINQ to Objects (the second Select) by using AsEnumerable():
var list = (from m in _repository.DBSet
where m.MessageIdentifier == id
select new {
// ...
Histories = m.Histories.Where(x => x.SenderId == userId)
})
.AsEnumerable() // database query is executed here
.Select(m => new Message {
// ...
Histories = m.Histories.ToList(),
// ...
}).ToList();
return list;
Be aware that Include has no effect when you use a projection with select. You need to make the properties that you want to include part of the projection - as you already did with select new { Histories.....
I'm trying to do something similar to this post where I don't pull back all columns from a particular entity, however my framework makes use of inheritence and I lose scope of the entity type after it's been cast to an anonymous type.
The structure of my Entity Framework has a base entity called Action. From here I've created two inherited entities called Event and Activity. I want to pull back the last X Actions and pass them to my strongly typed view which accepts an Action and from there determines if its an Activity or Event and renders the correct partial view.
if(Model.GetType() == typeof(Event))
{
//render Event view
}
else if(Model.GetType() == typeof(Activity))
{
//render Activity view
}
I can pull the last 10 as an anonymous type and then cast:
var result = from a in new DataContext().Actions
where a.UserId == someGuidValue
select new { a.CreatedOn, a.Summary };
List<Action> list = result.AsEnumerable()
.Select(o => new Action {
CreatedOn = o.CreatedOn,
Summary = o.Summary
}).ToList();
However, once I pass the new List of Actions to my strongly typed view it loses scope of whether it's an Activity or an Event since it's been cast as an Action. My question is, without exposing the discriminator column, is there any way to cast each item to the proper type or am I going about this the wrong way?
A bit kludgy, but will work:
var result = from a in new DataContext().Actions
where a.UserId == someGuidValue
let IsEvent = a as Event != null
select new { a.CreatedOn, IsEvent, a.Summary };
List<Action> list = result.AsEnumerable()
.Select(o => o.IsEvent ?
(Action) new Event {
CreatedOn = o.CreatedOn,
Summary = o.Summary
}
: (Action) new Activity {
CreatedOn = o.CreatedOn,
Summary = o.Summary
}
}).ToList();
Example with type-specific columns, presuming that e.EventSpecific is of a nullable type.
var result = from a in new DataContext().Actions
where a.UserId == someGuidValue
let ev = a as Event
let IsEvent = ev != null
select new { a.CreatedOn, IsEvent, a.Summary, ev.EventSpecific };
List<Action> list = result.AsEnumerable()
.Select(o => o.IsEvent ?
(Action) new Event {
CreatedOn = o.CreatedOn,
Summary = o.Summary,
EventSpecific = o.EventSpecific
}
: (Action) new Activity {
CreatedOn = o.CreatedOn,
Summary = o.Summary,
EventSpecific = o.EventSpecific // will be null, but using o.EventSpecific saves casting
}
}).ToList();
If o.EventSpecific is of a non-nullable type, then you must convert it to a nullable type in the L2E query.
You are probably on the wrong way. At first I would assume that Action should be an abstract class and you should not be able to create instances of it at all. If you then only fetch a subset of the properties and the subset does no longer allow to discriminate between events and activities, it is probably the wrong way to try making events and activities out of them.
So it actually seems not to be a technical problem - it should be quite easy to include some discrimination information in the anonymous type - but a design problem. I suggest to rethink if it is required to discriminate the query result and if so if it is really a good idea to discriminate the result in absence of an discriminator.