I have a property database and I am trying to get all properties added by an user. The main table is called 'Property' and there are other tables which are 'PropertyPhotos', 'City' etc. A sample database is as follows:
'Property' table
PropertyId| Area| State| UserId | ...
1 | 1 | 1 | AAA | ...
2 | 2 | 3 | BBB | ...
3 | 1 | 1 | AAA | ...
'PropertyPhotos'
PropertyPhotoId| PropertyId| FileName | MainPic
1 | 1 | x1.jpg | 1
2 | 1 | X2.jpg | 0
3 | 2 | x3.jpg | 1
4 | 3 | x4.jpg | 1
5 | 3 | x5.jpg | 0
6 | 3 | x6.jpg | 0
'AreaLookUp'
AreaLookUpId | AreaDescription
1 | London
2 | Birmingham
3 | Manchester
I am trying to write a LINQ query to get information on property added by a particular user. But I am stuck when trying to retrieve the 'FileName' of the MainPic and also get count. See code below with comments.
So, for the data above, this query should return the following for "UserId = AAA"
PropertyId | ... | MainPicSrc | PhotoCount
1 | ... | x1.jpg | 2
3 | ... | xr4jpg | 3
Please help!
public IEnumerable<PropertyExcerptViewModel> GetAddedPropertyVmByUserId(string userId)
{
var addedProperties = from p in db.Property where p.UserId == userId
join pp in db.PropertyPhotos on p.PropertyId equals pp.PropertyId
join a in db.AreaLookUp on p.Area equals a.AreaLookUpId
select new PropertyExcerptViewModel
{
PropertyId = p.PropertyId,
PropertyType = p.PropertyType,
TransactionType = p.TransactionType,
IsPropertyDisabled = p.IsPropertyDisabled,
IsPropertyVerified = p.IsPropertyVerified,
IsPropertyNotified = p.IsPropertyNotified,
MainPicSrc = pp.FileName, // How to put where condition to only get FileName of just the Main Pic
PhotoCount = pp.Count(), // How to get count of all pics with a particular proprtyId
Price = p.Price,
NoOfBedrooms = p.NoOfBedrooms,
Area = a.AreaLookUpDescription,
ShortDescription = (p.Description.Length > 300) ? p.Description.Substring(0,300) : p.Description
};
return addedProperties.ToList();
}
I think where statement might be easier if you care about clear match
var data=(from c in db.Property from v in db.PropertyPhotos from
n in db.AreaLookUpId
where c.PropertyId==v.PropertyId && c.Area==n.AreaLookUpId && c.UserId=="AAA"
// the rest is your select
PhotoCount = v.Where(j=>j. PropertyId==c.PropertyId).Count()
This also works - I ended up doing it this way
var addedProperties = from p in db.Property
join ppic in db.PropertyPhotos on p.PropertyId equals ppic.PropertyId into pp
join a in db.AreaLookUp on p.Area equals a.AreaLookUpId
join cal in db.CalendarEvent on p.PropertyId equals cal.PropertyId into c
where p.UserId == userId
select new PropertyExcerptViewModel
{
PropertyId = p.PropertyId,
PropertyType = p.PropertyType,
PropertyCategoryDescription = pc.PropertyCategoryDescription,
TransactionType = p.TransactionType,
IsPropertyDisabled = p.IsPropertyDisabled,
IsPropertyVerified = p.IsPropertyVerified,
IsPropertyNotified = p.IsPropertyNotified,
MainPicSrc = pp.Where(e => e.MainPic == true).FirstOrDefault().PhotoLocation,
PhotosCount = pp.Count(),
Price = p.Price,
NoOfBedrooms = p.NoOfBedrooms,
Area = a.AreaLookUpDescription,
ShortDescription = (p.Description.Length > 300) ? p.Description.Substring(0, 300) : p.Description,
LatestCalendarEvent = c.OrderByDescending(e => e.DateSaved).FirstOrDefault()
};
return addedProperties.ToList();
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