I have two XPaths:
[FindsBy(How = How.XPath, Using = "//a[contains(#href, '/PenSide')|//span[contains(text(), 'Side')]]")]
[FindsBy(How = How.XPath, Using = "//a[contains(#id,'PenSide')]")]
both these are tied to property SideIcon (public IPageModelProperty SideIcon{ get; set; })
I would like to use Priority attribute on these two XPaths. However it's not currently working.
[FindsBy(How = How.XPath, Using = "//a[contains(#href, '/PenSide')|//span[contains(text(), 'Side')]]", Priority = 1)]
[FindsBy(How = How.XPath, Using = "//a[contains(#id,'PenSide')]", Priority = 2)]
public IPageModelProperty SideIcon{ get; set; }
Related
I am looking forward to get a linq query for populating list of teachers and their respective divisons.
Here I have 2 classes Teacher and Division which are related by DivisionGroupID - GroupID
public class Teacher
{
public int ID { get; set; }
public string Name { get; set; }
public List<Division> lstDivison {get;set;}
public int DivisionGroupID { get; set; }
}
public class Division
{
public int GroupID { get; set; }
public string Name { get; set; }
public string Description { get; set; }
}
In main method List of both Teacher and Division will be populated
static void Main(string[] args)
{
Teacher obj = new Teacher { ID = 1, DivisionGroupID = 11, Name = "abcd" };
Teacher obj1 = new Teacher { ID = 2, DivisionGroupID = 12, Name = "efgh" };
List<Teacher> objList = new List<Teacher>();
objList.Add(obj);
objList.Add(obj1);
Division dv = new Division { GroupID = 11 ,Name="Division1",Description="first" };
Division dv1 = new Division { GroupID = 11, Name = "Division2", Description = "second" };
Division dv2 = new Division { GroupID = 11, Name = "Division3", Description = "third" };
Division dv3 = new Division { GroupID = 12, Name = "Division4", Description = "fourth" };
Division dv4 = new Division { GroupID = 12, Name = "Division5", Description = "fifth" };
Division dv5 = new Division { GroupID = 12, Name = "Division6", Description = "sixth" };
List<Division> lstDiv = new List<Division>();
lstDiv.Add(dv);
lstDiv.Add(dv1);
lstDiv.Add(dv2);
lstDiv.Add(dv3);
lstDiv.Add(dv4);
lstDiv.Add(dv5);
}
The requirement here is to get the list of teachers and populate the sublist of divisions each teachers holding. I got the solution based on 2 approaches.
Using sub query approach :
var upd = from teacher in objList
select new Teacher
{
ID = teacher.ID,
Name = teacher.Name,
lstDivison = (from div in lstDiv
where div.GroupID == teacher.DivisionGroupID
select new Division
{
Name = div.Name,
Description = div.Description
}).ToList()
};
Using Foeach loop through Teacher collection(objList) and updating the lstDivision
objList.ForEach(x => x.lstDivison = lstDiv
.Where(y => y.GroupID == x.DivisionGroupID)
.Select(p => new Division { Name = p.Name, Description = p.Description })
.ToList());
Both of these approaches will give me the result. But i am looking forward a better approach in as part of my project requirement which has to improve the query performance. Could you please suggest which is the best approach to handle this situation?
use yours teacher object to populate list of divisions under it. as my understanding that how it was designed class structure.
//populate property in object
objList.ForEach(x => {
x.lstDivison = lstDiv.Where(w=> w.GroupID == x.DivisionGroupID).ToList();
});
objList.Dump();
LINQ Query not populating
Model extract is as follows
public class ServiceBulletin
{
[Key]
public int Id { get; set; }
public virtual ICollection<ServiceBulletinProducts> ApplicableProducts { get; set; }
}
public class ServiceBulletinProducts
{
[Key]
public int Id { get; set; }
public int ServiceBulletinId { get; set; }
public virtual Product Product{ get; set; }
}
I'm using the following code at the moment to populate a collection
var x = from m in _dc.ServiceBulletins.Include(p => p.ApplicableProducts)
.Include(m => m.Manufacturer)
where m.DeleteStatus == DeleteStatus.Active
select m;
var x1 = new List<ServiceBulletin>();
foreach (var item in x)
{
var p = from m1 in _dc.ServiceBulletinsProducts.Include(p2=>p2.Product)
where m1.Product.DeleteStatus == DeleteStatus.Active &&
m1.ServiceBulletinId == item.Id
select m1;
var p99 = p.ToList();
item.ApplicableProducts = p99;
x1.Add(item);
};
So this is intended to have a Parent Child relationship and I’m trying to do a query which populates a collection of ServiceBulletins with a ApplicableProducts item with a fully populated collection of ServiceBulletinProducts for the ServiceBulletin with the values of the Product populated
The collection is populated but the ServiceBulletinProducts are always set to null and I can’t seem to add an Include such as .Include(p => p.ApplicableProducts.Products) to try and populate the product details – which is resulting in me iterating around the collection to populate the items.
Am I missing something to enable the population on the 1st query for the Include statement or do I need to do the query in a different way ?
Figured out the following should do the trick.
var x = from m in _dc.ServiceBulletins.Include(p => p.ApplicableProducts.Select(p2=>p2.Product))
.Include(m => m.Manufacturer)
where m.DeleteStatus == DeleteStatus.Active
select m;
I want to concatenate DateTime field and string field in MVC application.
I want Linq to Entities query to solve this. Here is my SQL query which I want in Linq.
Select accountid,TourID, ' ('+ convert(nvarchar(20), fromdate ,105) +')' + purpose as TourDetails
from Tour
where AccountID=#AccID;
As shown in above query I want to concat fromdate and purpose. I want to pass result of this query as JSON result.
Something like this:
public class Tour
{
public int accountid { get; set; }
public int TourID { get; set; }
public DateTime date { get; set; }
public string purpose { get; set; }
}
var t = new List<Tour>
{
new Tour
{
accountid = 1,
TourID = 2,
date = DateTime.Now,
purpose = "Testing"
}
};
var output = t.Where(c => c.accountid == accId).Select(k => new
{
accountid = k.accountid,
TourID = k.TourID,
TourDetails = k.date.ToString() + k.purpose
}).ToList();
var o = JsonConvert.SerializeObject(output);
You can use something like this if you're in a MVC Controller requiring an ActionResult as output :
//here 'context' is your DbContext implementation and Tours is your DbSet.
var TourDetails= context.Tours.Where(t=>t.AccountID==_AccID)
.Select(s=>new {
AccountID = s.accountid,
TourID = s.TourID,
//s.fromdate.ToString("yyyyMMddHHmmss") use this to format your date if needed
TourDetails = s.fromdate.ToString() + s.purpose
})
.ToList();
//JsonRequestBehavior.AllowGet only if your not using POST method
return Json(TourDetails, JsonRequestBehavior.AllowGet);
This is my query, an it almost works. I need to add to this query " where(k.IdUser == d.UserDoc.
The problem appears when I add this. Wherever I put this it stops working. Join isn't option here.
var documents = (from d in DocumentDAO.GetDocument()
from k in UserDAO.GetUsers()
where (DateTime.Now <= d.ExpirationDate)
select new DocumentUI
{
Title = d.Title,
Description = d.Description,
DateOfAdd = d.DateOfAdd,
ExpirationDate = d.ExpirationDate,
UserDoc = d.UserDoc,
User = new UserUI {
FirstName = k.FirstName,
LastName = k.LastName}
}).ToList();
My app gets the data from database and show this data in window. If I start my app with this query ( I have only one documents in db) it shows me the same document but with all Users, and I want to my application shows me only this user who Id is as foreign key in documents (UserDoc).
I tried somethig like this:
var documents = (from d in DocumentDAO.GetDocument()
from k in UserDAO.GetUsers()
where ((DateTime.Now <= d.ExpirationDate) && (d.UserDoc == k.IdUser))
select new DocumentUI
{
Title = d.Title,
Description = d.Description,
DateOfAdd = d.DateOfAdd,
ExpirationDate = d.ExpirationDate,
UserDoc = d.UserDoc,
User = new UserUI {
FirstName = k.FirstName,
LastName = k.LastName}
}).ToList();
And:
var documents = (from d in DocumentDAO.GetDocument()
from k in UserDAO.GetUsers().Where(k => k.IdUser == d.UserDoc)
where (DateTime.Now <= d.ExpirationDate)
select new DocumentUI
{
Title = d.Title,
Description = d.Description,
DateOfAdd = d.DateOfAdd,
ExpirationDate = d.ExpirationDate,
UserDoc = d.UserDoc,
User = new UserUI {
FirstName = k.FirstName,
LastName = k.LastName}
}).ToList();
and in both case my app shows me nothing
this it class DocumentUI:
public class DocumentUI
{
public string Title { get; set; }
public string Description { get; set; }
public DateTime DateOfAdd { get; set; }
public DateTime ExpirationDate { get; set; }
public int UserDoc { get; set; }
public UserUI User { get; set; }
}
The below query (Same as your first Query) should return List<DocumentUI> provided you have proper data which satisfy ((DateTime.Now <= d.ExpirationDate) && (d.UserDoc == k.IdUser))
var documents = (from d in DocumentDAO.GetDocument()
join k in UserDAO.GetUsers()
on d.UserDoc equals k.IdUser
where (d.ExpirationDate >= DateTime.Now)
select new DocumentUI
{
Title = d.Title,
Description = d.Description,
DateOfAdd = d.DateOfAdd,
ExpirationDate = d.ExpirationDate,
UserDoc = d.UserDoc,
User = new UserUI {
FirstName = k.FirstName,
LastName = k.LastName}
}).ToList();
Still, If you are not getting result verify the values in Var documents = DocumentDAO.GetDocument(), var users = UserDAO.GetUsers().
I have a LINQ query with more than 2 where conditions, but it doesn't seem to evaluate with more than 2 conditions. Is there a way to add more conditions to the where clause?
var query =
from f in XElement.Load(MapPath("flightdata3.xml")).Elements("flight")
where (string)f.Element("departurelocation") == From &&
(string)f.Element("destinationlocation") == DestCity &&
(string)f.Element("airline") == Airline
// && (string)f.Element("departuredate") == DepartDate &&
// (string)f.Element("departuretime")==DepartTime
//&& (string)f.Element("returndate")==ReturnDate &&
//(string)f.Element("returntime")==ReturnTime
orderby Convert.ToInt32(f.Element("price").Value)
select new
{
FlightNumber = (Int32)f.Element("flightnumber"),
Airline = (string)f.Element("airline"),
Departure = (string)f.Element("departureairportsymbol"),
DepartTime = (string)f.Element("departuretime"),
Destination = (string)f.Element("destinationairportsymbol"),
ArrivalTime = (string)f.Element("arrivaltime"),
Stops = (int)f.Element("numberofstops"),
Duration = (string)f.Element("duration"),
Cabin = (string)f.Element("cabin"),
Price = "$" + (Int32)f.Element("price"),
ImagePath = (string)f.Element("airlineimageurl").Value
};
LINQ absolutely allows more than two WHERE conditions. Have you tried separating the query into more manageable pieces? LINQ uses deferred execution anyway so you won't see a performance penalty in doing so.
You should also consider making a class to hold the information you're stuffing into the result.
public class FlightDetail
{
public Int32 FlightNumber { get; set; }
public String Airline { get; set; }
public String Departure { get; set; }
public String DepartureTime { get; set; }
public String Destination { get; set; }
public String ArrivalTime { get; set; }
public Int32 Stops { get; set; }
public String Duration { get; set; }
public String Cabin { get; set; }
public Int32 Price { get; set; }
public String ImagePath { get; set; }
}
Then something like this which is more readable but should also help you find whatever bug is popping up.
var flights =
from f in XElement.Load(MapPath("flightdata3.xml")).Elements("flight")
select new FlightDetail
{
FlightNumber = (Int32)f.Element("flightnumber"),
Airline = (string)f.Element("airline"),
Departure = (string)f.Element("departureairportsymbol"),
DepartTime = (string)f.Element("departuretime"),
Destination = (string)f.Element("destinationairportsymbol"),
ArrivalTime = (string)f.Element("arrivaltime"),
Stops = (int)f.Element("numberofstops"),
Duration = (string)f.Element("duration"),
Cabin = (string)f.Element("cabin"),
Price = "$" + (Int32)f.Element("price"),
ImagePath = (string)f.Element("airlineimageurl").Value
};
var flightsByLocation =
flights.
where (string)f.Element("departurelocation") == From &&
(string)f.Element("destinationlocation") == DestCity
select new FlightDetail
{
FlightNumber = (Int32)f.Element("flightnumber"),
Airline = (string)f.Element("airline"),
Departure = (string)f.Element("departureairportsymbol"),
DepartTime = (string)f.Element("departuretime"),
Destination = (string)f.Element("destinationairportsymbol"),
ArrivalTime = (string)f.Element("arrivaltime"),
Stops = (int)f.Element("numberofstops"),
Duration = (string)f.Element("duration"),
Cabin = (string)f.Element("cabin"),
Price = "$" + (Int32)f.Element("price"),
ImagePath = (string)f.Element("airlineimageurl").Value
};
There shouldn't be an issue with having more then one condition. For example, you could have something like this from an Order table.
var orderDetails = (from o in context.OrderDetails
where o.OrderID == orderID
where o.OrderName == orderName
select o).ToList();