trying to pass generic id's to class constructor

Question

I have below class LibrarySourceTableInput and having structure like as this

public class LibrarySourceTableInput<T> where T: ISourceOfData
{      
    public LibrarySourceTableInput(List<T> libraries, string mappedLibrarySource)
    {
        this.LibrarySourceRowInputs = libraries?.Select(l => new LibrarySourceRowInput()
            {
                LibrarySourceId = l.Id,
                SourceOfDataId = l.SourceOfData.Id
            }).ToList() ?? new(),
         this.MappedLibrarySource = mappedLibrarySource;
    }
    public List<LibrarySourceRowInput> LibrarySourceRowInputs { get; set; }
    public string MappedLibrarySource { get; set; }
}

and then the interface ISourceOfData structure looks like as this below

public interface ISourceOfData : IIdentity
{
    public new Guid Id { get; set; }
    public CodeStandardGuideline SourceOfData { get; set; }
}

And i am calling above class constructor in other place like as this

var mechanicalData = spaceTypeObject.TargetObject.MechanicalData;                           
 var librarySourceTableInputs = new List<LibrarySourceTableInput<ISourceOfData>>
 {
     new LibrarySourceTableInput<ISourceOfData>(mechanicalData?.Environments, mappedLibrarySource), // I am getting conversion error here 
     new LibrarySourceTableInput<ISourceOfData>(mechanicalData?.AirflowsA621 , mappedLibrarySource)
     .......
     .......
 }

and the structure for mechanicaldata.environments is looks like this

public class MechanicalData
{
    public List<LibraryEnvironment> Environments { get; set; }
    public List<LibraryA621> AirflowsA621 { get; set; }
    .......
}

and then last one libraryEnvironment class is looks like this

 public class LibraryEnvironment : ISourceOfData
 {
    public virtual CodeStandardGuideline SourceOfData { get; set; }
    .....
    ......
    public Guid Id {get; set;}     
 }

I have got the below error at this line new LibrarySourceTableInput<ISourceOfData>(mechanicalData?.Environments, mappedLibrarySource)

and the error is Cannot convert from Generic.List<LibraryEnvironment> to Generic.List<IsourceOfData>

Could any one please let me know or any idea on how to send that generic list to that class constructor, Many thanks in advance.

If you absolutely must work with a generic class, you might want to take a look at this question: [Collection of generic types](https://stackoverflow.com/q/3215402) — greenjaed, Mar 18 '21 at 21:25
never mind i figured out that just need to cast to corresponding interface — Glory Raj, Mar 18 '21 at 22:58

greenjaed · Answer 1 · 2021-03-18T21:01:29.353

0

Instead of specifying the interface ISourceOfData (your class already knows the type will have that interface), specify the actual class:

var librarySourceTableInputs = new List<LibrarySourceTableInput<LibraryEnvironment>>
{
    new LibrarySourceTableInput<LibraryEnvironment>(mechanicalData?.Environments, mappedLibrarySource),
     .......
     .......
}

edited Mar 18 '21 at 21:01

answered Mar 18 '21 at 20:55

greenjaed

589
8
20

I am passing different types to it in that i need to define `IsourceOfData` and i updated my question – Glory Raj Mar 18 '21 at 21:00

trying to pass generic id's to class constructor

1 Answers1