Lets say I have two lists of the same class.
public class emailfilter
{
public string from {get;set;}
public string to {get;set;}
public string cc {get;set;}
public string subj {get;set;}
public string body {get;set;}
public string emailid {get;set;}
}
//there are two lists of type emailfilter. 1 list is formed dynamically from the config file
List<emailfilter> configfilterlist = //mock sudo code//
{
efilter tempobj = new efilter();
tempobj.from = config.from or "" if no value
tempobj.to = config.to or "" if no value
tempobj.cc = config.cc or "" if no value
tempobj.subj = config.subj or "" if no value
tempobj.body = config.body or "" if no value
configfilterlist.add(tempobj);
}
//List1 will never have an emailID
//List2 is formed from email items pulled from exchange and made into efilter objects and those do have an emailid.
//List2 will typically have all object fields populated. List1, the object fields are optional
So I want to compare/intersect list1 of filter items against list2 of email items to a combined list without duplicates that includes only the items that have all filter criteria of list1 and includes the mailid of list2.
If there's no value for a value on List1, I want to ignore that and just match on the config values provided skipping over any "" blank strings. I'm hoping there's a way to do this with lambda and linq, but I haven't seen any examples with comparison on multiple values and ignoring others like in this case emailID.
UPDATE: Thank you #wertzui for providing the answer I needed to solve this. The final solution was just slightly different so updating the post/question with essentially the final solution in case it helps another lost soul.
public class emailfilter: IEquatable<emailfilter>
{
public string from { get; set; }
public string to { get; set; }
public string cc { get; set; }
public string subj { get; set; }
public string body { get; set; }
public string emailid { get; set; }
public override int GetHashCode()
{
return System.HashCode.Combine(from, to, cc, subj, body);
}
public override bool Equals(object? obj) => Equals(obj as emailfilter);
public bool Equals(emailfilter? other)
{
return
other != null &&
(from.Contains(other.from) || other.from == "") &&
(to.Contains(other.sentto) || other.to == "") &&
(cc.Contains(other.cc) || other.cc == "") &&
(subj.Contains(other.subj) || other.subj == "") &&
(body.Contains(other.body) || other.body == "");
}
}
//emailsasfilters is List2 = all exchange emails as filter objects
var combinedSet = new HashSet<emailfilter>();
foreach (var filter in configfilterlist) //configfilterlist is List1 = filters from Config
{
if (emailsasfilters.Contains(filter))
combinedSet.Add(emailsasfilters.ElementAt(emailsasfilters.IndexOf(filter)));
}
combinedSet.Dump();
Since .Net 6, there is a new UnionBy method which you can use.
var combined = configfilterlist
.UnionBy(
exchangefilterlist,
e => new { e.from, e.to, e.cc, e.subj, e.body })
.ToList();
Another method which works with older Framework versions is, to use a HashSet<T> and implement GetHashCode and Equals
public class emailfilter: IEquatable<emailfilter>
{
public string from { get; set; }
public string to { get; set; }
public string cc { get; set; }
public string subj { get; set; }
public string body { get; set; }
public string emailid { get; set; }
public override int GetHashCode()
{
return System.HashCode.Combine(from, to, cc, subj, body);
}
public override bool Equals(object? obj) => Equals(obj as emailfilter);
public bool Equals(emailfilter? other)
{
return
other != null &&
from == other.from &&
to == other.to &&
cc == other.cc &&
subj == other.subj &&
body == other.body;
}
}
var combinedSet = new HashSet<emailfilter>(configfilterlist);
foreach (var email in exchangefilterlist)
{
combinedSet.Add(email);
}
combinedSet.Dump();
Related
I have DataTable
public static DataTable SubProjects = new DataTable();
public static DataTable GetSubProjects
{
get { return SubProjects; }
}
it comes from database so columns are as follows
select ProjectN,ProjectSubN,ProjectM
and list:
public class SubProjectsList
{
public string ProjectNumber { get; set; }
public string SubProjectNumber { get; set; }
public string SubProjectName { get; set; }
public string ProjectManager { get; set; }
public int ObjectID { get; set; }
public SubProjectsList(string ProjectNumber, string SubProjectNumber, string SubProjectName, string ProjectManager, int ObjectID)
{
this.ProjectNumber = ProjectNumber;
this.SubProjectNumber = SubProjectNumber;
this.SubProjectName = SubProjectName;
this.ProjectManager = ProjectManager;
this.SubProjectNumber = SubProjectNumber;
this.ObjectID = ObjectID;
}
}
public static List<SubProjectsList> DeliverySubProjectList = new List<SubProjectsList>();
Ultimately I would like to get all results to new List where
ProjectN + ProjectSubN (DataTable) = ProjectNumber + SubProjectNumber (List) &&
ProjectM (DataTable) != ProjectManager (List)
As an output I need to get ProjectNumber, SubProjectNumber, ProjectM, ProjectManager. Basically I need to catch ProjectM and ProjectManager that does not match for one sub-project. I could have done it this way
var SubProjectResult = SubProjects.AsEnumerable()
.Where(x => DeliverySubProjectList.Any(y =>
y.ProjectNumber.Trim() + y.SubProjectNumber == x.Field<string>("ProjectN").Trim() + x.Field<string>("ProjectSubN").Trim() &&
!string.Equals(y.ProjectManager.Trim(), x.Field<string>("ProjectM").Trim(), StringComparison.CurrentCultureIgnoreCase)))
.Select(x => new
{
ProjectN = x.Field<string>("ProjectN"),
ProjectN = x.Field<string>("ProjectSubN"),
ProjectM = x.Field<string>("ProjectM"),
ProjectM = x.ProjectManager // This is not possible
})
.OrderBy(o => o.ProjectN).ToList();
but
ProjectM = x.ProjectManager // This is not possible
is wrong and does not compile. So I can't get ProjectManager from List where ProjectN + ProjectSubN (DataTable) = ProjectNumber + SubProjectNumber (List) match but ProjectManager does not match. Do I need to Concat DataTable and List together first? I have tried this
var myList1 = SubProjects.AsEnumerable().Concat(DeliverySubProjectList).ToList();
but getting an error
Severity Code Description Project File Line Suppression State
Error CS1929 'EnumerableRowCollection' does not contain a
definition for 'Concat' and the best extension method overload
'Queryable.Concat(IQueryable,
IEnumerable)' requires a receiver of type
'IQueryable'
I think this should give you what you are looking for. You might need to add extra null checks and I am also not very sure about that's how you want to add string values from the list and the data table:
public class ResultModel
{
public string ProjectNumber { get; set; }
public string SubProjectNumber { get; set; }
public string ProjectM { get; set; }
public string ProjectManager { get; set; }
}
...
...
static void Main(string[] args)
{
List<SubProjectsList> DeliverySubProjectList = // populate list
DataTable SubProjects = // populate datatable
List<ResultModel> results = GetResults(DeliverySubProjectList, SubProjects).ToList();
}
private static IEnumerable<ResultModel> GetResults(List<SubProjectsList> DeliverySubProjectList, DataTable SubProjects)
{
return SubProjects.AsEnumerable().Select(row =>
{
var listItem = DeliverySubProjectList.FirstOrDefault(item =>
{
return item.ProjectNumber + item.SubProjectNumber == row["ProjectN"].ToString() + row["ProjectSubN "].ToString()
&& !item.ProjectManager.Equals(row["ProjectM"].ToString());
});
if (listItem != null)
{
return new ResultModel
{
ProjectNumber = row["ProjectN"].ToString(),
SubProjectNumber = listItem.SubProjectNumber,
ProjectM = row["ProjectM"].ToString(),
ProjectManager = listItem.ProjectManager
};
}
else
{
return null;
}
})
.Where(res => res != null);
}
Following situation:
Table of users
Table of addresses
The user has a single optional reference to the address table (=left join)
The query to fetch the data is:
IQueryable<User> query =
from u in _dbContext.Users
join a in _dbContext.Address on u.AddressId equals a.Id into address
from addresses in address.DefaultIfEmpty()
select new User(u, a);
Now I want to do a sorting on the query based on the municipality of the address
query = query.OrderBy(u => u.Address.Municipality);
The problem is that the Address can be a null value (as the address is optional) and for that reason it is throwing following exception.
NullReferenceException: Object reference not set to an instance of an object.
Is there a way to order on the municipality knowing that it can be null?
Already tried following things with same outcome:
query = query.OrderBy(u => u.Address.Municipality ?? "");
query = query.OrderBy(u => u.Address == null).ThenBy(u => u.Address.Municipality);
You can use
query = query.OrderBy(u => u.Address.Municipality.HasValue);
You can write your comparer like this:
public class One
{
public int A { get; set; }
}
public class Two
{
public string S { get; set; }
}
public class T
{
public One One { get; set; }
public Two Two { get; set; }
}
public class OrderComparer : IComparer<Two>
{
public int Compare(Two x, Two y)
{
if (((x == null) || (x.S == null)) && ((y == null) || (y.S == null)))
return 0;
if ((x == null) || (x.S == null))
return -1;
if ((y == null) || (y.S == null))
return 1;
return x.S.CompareTo(y.S);
}
}
static void Main(string[] args)
{
var collection = new List<T> {
new T{ One = new One{A=1}, Two = new Two{ S="dd" } },
new T{ One = new One{A=5}, Two = null },
new T{ One = new One{A=0}, Two = new Two{ S=null } },
new T{ One = new One{A=6}, Two = new Two{ S="aa" } },
};
var comparer = new OrderComparer();
collection = collection.OrderBy(e => e.Two, comparer).ToList();
}
But in your case you have to write var collection = query.AsEnumerable().OrderBy(x=>x.Address).
Also there is other method:
var result = query.Where(x=>x.Address==null || x.Address.Municipality==null)
.Union(query.Where(x.Address!=null && x.Address.Municipality!=null).OrderBy(x=>x.Address.Municipality));
I create a simple demo and it works well when I add nullable foreign key to the two tables.
Besides, I do not understabd what is select new User(u, a); in your code.
Below is my sample code:
Models:
public class User
{
public int Id { get; set; }
public string Name { get; set; }
[ForeignKey("Address")]
public int? AddressId { get; set; }
public Address Address { get; set; }
}
public class Address
{
public int Id { get; set; }
public string AddressName { get; set; }
public string Municipality { get; set; }
}
Action:
IQueryable<User> query =
from u in _context.Users
join a in _context.Address on u.AddressId equals a.Id into address
from addresses in address.DefaultIfEmpty()
select new User
{
Id = u.Id,
Name = u.Name,
AddressId = u.AddressId,
Address = addresses
};
query = query.OrderBy(u => u.Address.Municipality);
I am trying to get multiple results into a list to send back to JS to populate a grid. The first query (_mappedQuery) is getting data. I then want to end up putting the values into the _udfList object. I keep getting variances on the error 'cannot convert queryable to class'
I have tried setting as lists, creating query objects, single class objects. All no luck so far
MemberMNCFormsList _udfList = new MemberMNCFormsList();
foreach (var _row in _udfTables) {
System.Diagnostics.Debugger.Break();
System.Diagnostics.Debugger.Launch();
var _mappedQuery = (from res in Query<UdfColumnMapping>().AsNoTracking()
join udf in Query<UserDefinedForms>().AsNoTracking() on res.Func_Area equals udf.Func_Area
join ds in Query<Data_Set>().AsNoTracking() on res.Data_ID equals ds.DATA_ID
join df in Query<DEFITEM>().AsNoTracking() on ds.DEF_ID equals df.DEF_ID
where udf.UserDefinedForms_ID == _row.UserDefinedForms_ID &&
(res.FieldName.ToLower().StartsWith("reviewname") ||
res.FieldName.ToLower().StartsWith("disposition") ||
res.FieldName.ToLower().StartsWith("reviewdate"))
select (new MemberMNCForms {
UserDefinedFormData_ID = _row.UserDefinedFormData_ID,
FormId = udf.UserDefinedForms_ID,
MappedColumnName = res.MappedColumnName,
FieldName = res.FieldName,
MappedTableName = res.MappedTableName,
Reviewed_Name = _row.LAST_NAME.Trim() + ", " + _row.FIRST_NAME.Trim(),
Reviewed_Date = _row.CreateDate.GetShortDateorEmpty().ToString()
}));
var _formRow = _mappedQuery.Select(t => new MemberMNCForms {
UserDefinedFormData_ID = t.UserDefinedFormData_ID,
FormId = t.FormId,
MappedColumnName = t.MappedColumnName,
FieldName = t.FieldName,
MappedTableName = t.MappedTableName,
Reviewed_Name = t.Reviewed_Name,
Reviewed_Date = t.Reviewed_Date
})));
_udfList.list.Add(_formRow);
public sealed class MemberMNCForms {
public Guid? UserDefinedFormData_ID { get; set; }
public int FormId { get; set; }
public string Reviewed_Name { get; set; }
public string MappedColumnName { get; set; }
public string FieldName { get; set; }
public string MappedTableName { get; set; }
public int? MNCDetermination_ID { get; set; }
public string Reviewed_By { get; set; }
public string Reviewed_Date { get; set; }
}
public sealed class MemberMNCFormsList : ErrorInfo
{
public List<MemberMNCForms> list = new List<MemberMNCForms>();
public int Count { get; set; }
}
I am trying to get the _udfList object populated with the values coming from _mappedQuery. The only thing I thought would work was to create a MemberMNCForms object for each record in _mappedQuery to then add to _udfList.list
_formRow is an IEnumerable<MemberMNCForms>
var _formRow = _mappedQuery.Select(t => new MemberMNCForms {
UserDefinedFormData_ID = t.UserDefinedFormData_ID,
FormId = t.FormId,
MappedColumnName = t.MappedColumnName,
FieldName = t.FieldName,
MappedTableName = t.MappedTableName,
Reviewed_Name = t.Reviewed_Name,
Reviewed_Date = t.Reviewed_Date
})));
Here you are trying to add an IEnumerable<MemberMNCForms> to a List<MemberMNCForms>
_udfList.list.Add(_formRow);
You can't do this with .Add. You have to use .AddRange
Try this:
_udfList.list.AddRange(_formRow);
When you use linq like that, even if there is a single item in the list that you are Selecting on, it is just an expression tree until it is iterated on.
I assume that you are expecting a collection of MemberMNCForms back so you would need use AddRange instead of Add
_udfList.list.AddRange(_formRow);
To make sure that it has been executed, you can use ToList
_udfList.list.AddRange(_formRow.ToList());
If you are just expecting a single result, you can use SingleOrDefault.
var result = _formRow.SingleOrDefault();
if (result != null) {
_udfList.list.Add(result);
}
i have table looks like below
ID | Reason | PrID
-----------------
1 abc null
2 dhe null
3 aerc 1
4 dwes 2
5 adfje 1
i have class
public class Reason
{
public int Id { get; set; }
public string Reson{ get; set; }
public List<SecondryReason> SecReason{ get; set; }
public int? PrimaryId { get; set; }
}
public class SecondryReason
{
public int Id { get; set; }
public string Reason { get; set; }
public int PrimaryReasonId { get; set; }
}
I want this to be displayed in hierarchy level
if the prid is Null need to treat this as the parent remaining all child
i am trying Linq and unable to achieve this
Suggest me how to do this in an easy way in linq
So: You have a list/enumerable of type , whereof the SecReason List property is null. Then, using linq you want a list, were the only the "root" reasons remain, but the Sub-reasons got put in the lists, but as type SecondaryReason?
If so, I found this way to do it (linq and foreach):
static IEnumerable<Reason> GetReasonsGrouped(List<Reason> reasons)
{
var result = reasons.Where(x => x.PrimaryId == null);
foreach (var item in result)
{
item.SecReason = reasons.Where(x => x.PrimaryId == item.Id)
.Select(x => new SecondryReason()
{ Id = x.Id,
ReasonName = x.ReasonName,
PrimaryReasonId = item.Id
})
.ToList();
}
return result;
}
Or just linq, but harder to read:
var result = reasons.Where(x => x.PrimaryId == null)
.Select(x =>
{
x.SecReason = reasons.Where(r => x.PrimaryId == x.Id)
.Select(r => new SecondryReason()
{
Id = r.Id,
ReasonName = x.ReasonName,
PrimaryReasonId = x.Id
})
.ToList();
return x;
});
Not sure if linq will be the best solution, here is my proposed changes and method to get an Hierarchy type:
public class Reason
{
public int Id { get; set; }
public string Reson { get; set; }
public List<Reason> SecReason { get; set; }
public int? PrimaryId { get; set; }
//Adds child to this reason object or any of its children/grandchildren/... identified by primaryId
public bool addChild(int primaryId, Reason newChildNode)
{
if (Id.Equals(primaryId))
{
addChild(newChildNode);
return true;
}
else
{
if (SecReason != null)
{
foreach (Reason child in SecReason)
{
if (child.addChild(primaryId, newChildNode))
return true;
}
}
}
return false;
}
public void addChild(Reason child)
{
if (SecReason == null) SecReason = new List<Reason>();
SecReason.Add(child);
}
}
private List<Reason> GetReasonsHierarchy(List<Reason> reasons)
{
List<Reason> reasonsHierarchy = new List<Reason>();
foreach (Reason r in reasons)
{
bool parentFound = false;
if (r.PrimaryId != null)
{
foreach (Reason parent in reasonsHierarchy)
{
parentFound = parent.addChild(r.PrimaryId.Value, r);
if (parentFound) break;
}
}
if (!parentFound) reasonsHierarchy.Add(r);
}
return reasonsHierarchy;
}
Hi I'm a new to elastic nest API and I'm using nest 5.x. I'm currently developing some kind of advanced search page so when user doesn't check a criteria i don't have to include that filter on my query. I'm trying to combine 2 queries under must operator with object initializer approach using nest. How to achieve it? I'm following the example on [https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/bool-queries.html]
var secondSearchResponse = client.Search(new
SearchRequest {
Query = new TermQuery { Field = Field(p => p.Name), Value = "x" } &&
new TermQuery { Field = Field(p => p.Name), Value = "y" } });
But it doesnt work cause Field class doesnt accept type arguments.
I also tried to followed this approach from this topic
[Nest Elastic - Building Dynamic Nested Query
here is my code
public HttpResponseMessage GetSearchResult([FromUri] SearchModels queries)
{
try
{
///
string result = string.Empty;
result += "queryfields + " + queries.queryfields == null ? string.Empty : queries.queryfields;
result += "datefrom + " + queries.datefrom == null ? string.Empty : queries.datefrom;
result += "dateto + " + queries.dateto == null ? string.Empty : queries.dateto;
result += "emitentype + " + queries.emitentype == null ? string.Empty : queries.emitentype;
QueryContainer andQuery = null;
//List<QueryContainer> QueryContainers = new List<QueryContainer>();
IDXNetAnnouncement record = new IDXNetAnnouncement
{
kode_emiten = queries.kodeemiten
};
#region keyword
if (!string.IsNullOrEmpty(queries.queryfields))
{
var val = queries.queryfields;
TermQuery tq = new TermQuery
{
Field = queries.queryfields,
Value = val
};
if (andQuery == null)
andQuery = tq;
else
andQuery &= tq;
//QueryContainers.Add(tq);
}
#endregion keyword
#region kodeemiten
if (!string.IsNullOrEmpty(queries.kodeemiten))
{
var val = queries.kodeemiten;
TermQuery tq = new TermQuery
{
Name = "kode_emiten",
Field = record.kode_emiten,
Value = val
};
if (andQuery == null)
andQuery = tq;
else
andQuery &= tq;
//QueryContainers.Add(tq);
}
#endregion
#region date
if (!string.IsNullOrEmpty(queries.datefrom) && !string.IsNullOrEmpty(queries.dateto))
{
DateRangeQuery dq = new DateRangeQuery();
dq.Name = "tglpengumuman";
dq.LessThanOrEqualTo = DateMath.Anchored(queries.dateto);
dq.GreaterThanOrEqualTo = DateMath.Anchored(queries.datefrom);
dq.Format = "dd/mm/yyyy";
if (andQuery == null)
andQuery = dq;
else
andQuery &= dq;
//QueryContainers.Add(dq);
}
#endregion keyword
var reqs = (ISearchResponse<IDXNetAnnouncement>)null;
if (andQuery != null)
{
reqs = conn.client.Search<IDXNetAnnouncement>(s => s
.AllIndices()
.AllTypes()
.From(queries.indexfrom)
.Size(queries.pagesize)
.Query(q => q.Bool(qb => qb.Must(m => m.MatchAll() && andQuery))));
//var json = conn.client.Serializer.SerializeToString(reqs.ApiCall.ResponseBodyInBytes);
}
else
{
reqs = conn.client.Search<IDXNetAnnouncement>(s => s
.AllIndices()
.AllTypes()
.From(queries.indexfrom)
.Size(queries.pagesize)
.Query(m => m.MatchAll()));
}
//var reqstring = Encoding.UTF8.GetString(conn.client.);
var reslts = this.conn.client.Serializer.SerializeToString(reqs,SerializationFormatting.Indented);
var resp = new HttpResponseMessage()
{
Content = new StringContent(reslts)
};
resp.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return resp;
}
catch (Exception e)
{
var resp = new HttpResponseMessage()
{
Content = new StringContent(e.ToString())
};
resp.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return resp;
}
}
But that returns zero result. How to achieve this? Thx anyway.
EDIT :
This is the params variabel definition. Its apoco model of search keywords
public class SearchModels
{
public string queryfields { get; set; }
public string datefrom { get; set; }
public string dateto { get; set; }
public string emitentype { get; set; }
public string kodeemiten { get; set; }
public string issuercode { get; set; }
public int indexfrom { get; set; }
public int pagesize { get; set; }
}
IDXNetAnnouncement is a poco model of search result. Its actualy a document type which is stored on the elastic server
public class IDXNetAnnouncement
{
public string perihalpengumuman { get; set; }
public string attachments { get; set; }
public string createddate { get; set; }
public bool efekemiten_spei { get; set; }
public string jmsxgroupid { get; set; }
public string tglpengumuman { get; set; }
public object errordescription { get; set; }
public string ESversion { get; set; }
public int oldfinalid { get; set; }
public bool efekemiten_etf { get; set; }
public object errorcode { get; set; }
public string jenisemiten { get; set; }
public int pkid { get; set; }
public string judulpengumuman { get; set; }
public string form_id { get; set; }
public bool efekemiten_eba { get; set; }
public string jenispengumuman { get; set; }
public string nopengumuman { get; set; }
public string kode_emiten { get; set; }
public string divisi { get; set; }
public string EStimestamp { get; set; }
public bool efekemiten_obligasi { get; set; }
public long finalid { get; set; }
public bool efekemiten_saham { get; set; }
public string kodedivisi { get; set; }
public string SearchTerms
{
get
{
return string.Format("{0} {1} {2}", judulpengumuman, kode_emiten, nopengumuman);
}
}
}
But it doesnt work cause Field class doesnt accept type arguments.
You need to ensure that you include a using static directive for Nest.Infer i.e.
using static Nest.Infer;
with the rest of the using directives.
.Query(q => q.Bool(qb => qb.Must(m => m.MatchAll() && andQuery))));
No need to wrap in a Must(), just do
.Query(q => q.MatchAll() && andQuery)
which will wrap both queries in a bool query must clause. You also don't need to null check andQuery because NEST is smart enough to not combine the two queries if either or both are null.
if (!string.IsNullOrEmpty(queries.queryfields))
{
var val = queries.queryfields;
TermQuery tq = new TermQuery
{
Field = queries.queryfields,
Value = val
};
if (andQuery == null)
andQuery = tq;
else
andQuery &= tq;
//QueryContainers.Add(tq);
}
NEST has the concept of conditionless queries so you don't need to check it queries.queryfields is null or empty, simply build the query and add it to andQuery. So it would become
var val = queries.queryfields;
andQuery &= new TermQuery
{
Field = queries.queryfields,
Value = val
};
Aside
All of the NEST documentation is generated from source code; you can trace back to the original source file by clicking on any edit link within the documentation. This will take you to a github page, such as this one for bool queries. From here, the document contains an important note that links back to the original source.