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How to add nodes to my Child/Parent object?

I have an object below:
public class SubjectCategory : BaseModel
{
public decimal ParentSubjectCategoryId { get; set; }
public bool IsEnable { get; set; }
public virtual List<Subject>? Subjects { get; set; }
public virtual List<SubjectCategory>? ChildrenCategoris { get; set; }
public virtual SubjectCategory? ParentCategory { get; set; }
}
I get lists of subjectCategories from database (Picture Below).
I wrote a method that it adds ChildrenCategoris inside the categories which their ParentSubjectCategory Id is NULL or 0, but the problem is it is only works for the first level of tree!
public List<SubjectCategory> GetAllSubjectCategories()
{
var res = _subjectCategoryRepository.Select(new SubjectCategory {}).ToList();
List<SubjectCategory> newSubjectCategory = new List<SubjectCategory>();
foreach (var item in res)
{
if(item.ParentSubjectCategoryId != 0)
{
var a = newSubjectCategory.Where(sc => sc.Id ==
item.ParentSubjectCategoryId).FirstOrDefault();
if(a.ChildrenCategoris == null)
{
newSubjectCategory.Where(sc => sc.Id ==
item.ParentSubjectCategoryId).FirstOrDefault().ChildrenCategoris = new List<SubjectCategory>() { item};
}
else
{
newSubjectCategory.Where(sc => sc.Id == item.ParentSubjectCategoryId).FirstOrDefault().ChildrenCategoris.Add(item);
}
}
else
{
newSubjectCategory.Add(item);
}
}
return res;
}
But every child can have many ChildrenCategoris and their children can have many ChildrenCategoris as well and again.
the loop count is unknown.
how can I have a list with multiple children with C# ?

Tree hierarchy setting flag true if child exists C#

I am trying to set issetting flag to true , if child exists for a
parent.
//Class file
public class EopsModule
{
public int ID { get; set; }
public string ModuleCode { get; set; }
public string Description { get; set; }
public bool IsDefaultModule { get; set; }
public int? ParentID { get; set; }
public bool IsSetting { get; set; }
public List<EopsModule> Children { get; set; }
}
public IResponseResult GetApplicationSettingWithModule()
{
IResponseResult responseResult = new ResponseResult();
dynamic dynamic = new ExpandoObject();
try
{
var settingsDetails = _databaseManager.GetMultipleDataByJson(DatabaseStoredProcedures.spGetAllApplicationSetting.ToString()).Result;
var oObjectDeserializeObject = Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(settingsDetails);
//get here all EopsModule in List<EopsModule>
var moduleTreeHierarchy = _eopsModuleManager.GetAllEopsModuleWithHierarchy().Result;
dynamic.settingsDetails = oObjectDeserializeObject;
dynamic.moduleTreeHierarchy = moduleTreeHierarchy;
string oModuleCode = string.Empty;
foreach (var item in oObjectDeserializeObject)
{
oModuleCode = item.moduleCode;
moduleTreeHierarchy.
Where(x => x.ModuleCode == oModuleCode).ToList().ForEach(x =>
{
x.IsSetting = true;
});
}
responseResult = Helper.Response.ResponseModel(dynamic, true, Helper.Constants.ApiSuccess, HttpStatusCode.OK, true);
}
catch (Exception)
{
responseResult = Helper.Response.ResponseModel(null, false, Helper.Constants.ApiFailure, HttpStatusCode.BadRequest, true);
}
return responseResult;
}
The loop i am iterating is working for parent level but , its not updating the value for child values,
wondering if it can be achieved by recursive function.
Please find the output with existing code :

Have you tried something like this? I did not pass it through compiler but you'll get the idea.
public UpdateModuleAndChildren(Module moduleTreeHierarchy) {
if(moduleTreeHierarchy.children != null && moduleTreeHierarchy.children.Count() > 0) {
moduleTreeHierarchy.children.forEach(x => { this.UpdateModuleAndChildren(x) });
module.IsSetting = true;
}
}
Let me know if it helps.
In your code you will just call this.UpdateModuleAndChildren(moduleTreeHierarchy)

Linq query for the Multi list in singe out put

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;
}

Compare collection with objects and copy the differences

I have a Collection:
Collection<DateOfValues> collectionDateOfValues;
...
I get a DateOfValues Instance - lets say dateOfValuesNew and want to iterate over the collection and overwrite only values that are different.
public class DateOfValues
{
{
this.Values = new Collection<SomeValue>();
}
public int id { get; set;}
public DateTime Start { get; set; }
public Collection<SomeValue> Values;
}
public class SomeValue
{
public int Id { get; set; }
public DateOfValues Date { get; set; }
public string Status { get; set; }
publi decimal StatusNumber { get; set; }
}
What I have done:
if (dateOfValuesNew != null)
{
foreach (var dateOfValues in collectionDateOfValues)
{
if (dateOfValues.Id == dateOfValuesNew.Id)
{
// Here Im sure to find the dateOfValues Instance I will work with.
}
}
}
But If I want to compare dateOfValues with dateOfValuesNew with foreach it is ugly and unreadable.
Is there any better way to do it?
The Start of DateOfValues can be changed. It is the easiest part - cause I can simply overwrite it.
The hard part is to compare SomeValue Collection. Every SomeValue can have changed Date and Status - this can be solved with overwriting too.
But SomeValue Collection can become new SomeValue or it can be deleted.
For example dateOfValues has 3 SomeValue in SomeValue Collection and dateOfValuesNew will have 4 or 2.

A bit tricky but this works:
class Program
{
static void Main(string[] args)
{
// Test
DateOfValues dov1 = new DateOfValues { Id = 1, Start = new DateTime(2011, 12, 01) };
dov1.AddSomeValue(1,"OK",2);
dov1.AddSomeValue(2,"Not OK",3);
dov1.AddSomeValue(3,"Not OK",4);
dov1.AddSomeValue(4,"Additional dov1",5);
DateOfValues dov2 = new DateOfValues { Id = 1, Start = new DateTime(2011, 12, 02) };
dov2.AddSomeValue(1, "OK", 2);
dov2.AddSomeValue(2, "Not OK", 4);
dov2.AddSomeValue(3, "OK", 1);
dov2.AddSomeValue(6, "Additional dov2", 15);
foreach (Tuple<SomeValue,SomeValue> difference in dov1.GetDifference(dov2))
{
if (difference.Item1 != null)
{
Console.WriteLine("Item1: Id:{0}; Status:{1}; Status Number:{2}",
difference.Item1.Id, difference.Item1.Status, difference.Item1.StatusNumber);
}
if (difference.Item2 != null)
{
Console.WriteLine("Item2: Id:{0}; Status:{1}; Status Number:{2}",
difference.Item2.Id, difference.Item2.Status, difference.Item2.StatusNumber);
}
Console.WriteLine("-------------------------------------------");
}
}
}
public class DateOfValues
{
public DateOfValues()
{
Values = new Collection<SomeValue>();
}
public int Id { get; set; }
public DateTime Start { get; set; }
public Collection<SomeValue> Values;
public void AddSomeValue(int id, string status, decimal statusNumber)
{
Values.Add(new SomeValue{Date = this,Id = id,Status = status,StatusNumber = statusNumber});
}
public IEnumerable<Tuple<SomeValue, SomeValue>> GetDifference(DateOfValues other)
{
IEnumerable<SomeValue> notMatching = Values.Where(v => !other.Values.Any(o => v.Equals(o)))
.Union(other.Values.Where(v=> !Values.Any(o=> v.Equals(o)))).Distinct();
return notMatching
.GroupBy(x => x.Id)
.Select(x =>
new Tuple<SomeValue, SomeValue>(
x.FirstOrDefault(y => y.Date == this), x.FirstOrDefault(y => y.Date == other)));
}
}
public class SomeValue : IEquatable<SomeValue>
{
public int Id { get; set; }
public DateOfValues Date { get; set; }
public string Status { get; set; }
public decimal StatusNumber { get; set; }
public bool Equals(SomeValue other)
{
return other.Id == Id && other.Status == Status && other.StatusNumber == StatusNumber;
}
}
Output:
Item1: Id:2; Status:Not OK; Status Number:3
Item2: Id:2; Status:Not OK; Status Number:4
-------------------------------------------
Item1: Id:3; Status:Not OK; Status Number:4
Item2: Id:3; Status:OK; Status Number:1
-------------------------------------------
Item1: Id:4; Status:Additional dov1; Status Number:5
-------------------------------------------
Item2: Id:6; Status:Additional dov2; Status Number:15
-------------------------------------------
Edit
Alternative you could use an EqualityComparer:
public class DateOfValues
{
public DateOfValues()
{
Values = new Collection<SomeValue>();
}
public int Id { get; set; }
public DateTime Start { get; set; }
public Collection<SomeValue> Values;
public void AddSomeValue(int id, string status, decimal statusNumber)
{
Values.Add(new SomeValue { Date = this, Id = id, Status = status, StatusNumber = statusNumber });
}
public IEnumerable<Tuple<SomeValue, SomeValue>> GetDifference(DateOfValues other)
{
var notMatching = Values.Except(other.Values, new SomeValueComparer())
.Union(other.Values.Except(Values,new SomeValueComparer()));
return notMatching
.GroupBy(x => x.Id)
.Select(x =>
new Tuple<SomeValue, SomeValue>(
x.FirstOrDefault(y => y.Date == this), x.FirstOrDefault(y => y.Date == other)));
}
}
public class SomeValueComparer : IEqualityComparer<SomeValue>
{
public bool Equals(SomeValue x, SomeValue y)
{
return
x.Id == y.Id &&
x.Status == y.Status &&
x.StatusNumber == y.StatusNumber;
}
public int GetHashCode(SomeValue obj)
{
return obj.GetHashCode();
}
}
public class SomeValue
{
public int Id { get; set; }
public DateOfValues Date { get; set; }
public string Status { get; set; }
public decimal StatusNumber { get; set; }
public override int GetHashCode()
{
return string.Format("{0}{1}{2}",Id,Status,StatusNumber).GetHashCode();
// or a better method to get a hashcode
}
}

Statement is not updating data item

I have this LINQ statement that tries to set the 1st element in the collection of string[]. But it doesn't work.
Below is the LINQ statement.
docSpcItem.Where(x => x.DocID == 2146943)
.FirstOrDefault()
.FinishingOptionsDesc[0] = "new value";
public string[] FinishingOptionsDesc
{
get
{
if (this._FinishingOptionsDesc != null)
{
return (string[])this._FinishingOptionsDesc.ToArray(typeof(string));
}
return null;
}
set { this._FinishingOptionsDesc = new ArrayList(value); }
}
What's wrong with my LINQ statement above?

Couple of things.. There are some problems with your get and set. I would just use auto properties like this..
public class DocSpcItem
{
public string[] FinishingOptionsDesc { get; set; }
public int DocID { get; set; }
}
Next for your linq statement, depending on the presence of an item with an id of 2146943 you might be setting a new version of the object rather than the one you intended. This should work..
[TestMethod]
public void Linq()
{
var items = new List<DocSpcItem>();
//2146943
for (var i = 2146930; i <= 2146950; i++)
{
items.Add(new DocSpcItem()
{ DocID = i
, FinishingOptionsDesc = new string[]
{ i.ToString() }
}
);
}
var item = items.FirstOrDefault(i => i.DocID == 2146943);
if (item != null)
{
item.FinishingOptionsDesc = new string[]{"The New Value"};
}
}
and
public class DocSpcItem
{
public string[] FinishingOptionsDesc { get; set; }
public int DocID { get; set; }
}