Initializing an Array of Structs in C#

by

Firstly, do you really have to have a mutable struct? They’re almost always a bad idea. Likewise public fields. There are some very occasional contexts in which they’re reasonable (usually both parts together, as with ValueTuple) but they’re pretty rare in my experience.

Other than that, I’d just create a constructor taking the two bits of data:

class SomeClass
{

    struct MyStruct
    {
        private readonly string label;
        private readonly int id;

        public MyStruct (string label, int id)
        {
            this.label = label;
            this.id = id;
        }

        public string Label { get { return label; } }
        public string Id { get { return id; } }

    }

    static readonly IList<MyStruct> MyArray = new ReadOnlyCollection<MyStruct>
        (new[] {
             new MyStruct ("a", 1),
             new MyStruct ("b", 5),
             new MyStruct ("q", 29)
        });
}

Note the use of ReadOnlyCollection instead of exposing the array itself – this will make it immutable, avoiding the problem exposing arrays directly. (The code show does initialize an array of structs – it then just passes the reference to the constructor of ReadOnlyCollection<>.)

More Related Contents:

  1. Difference between List and array when initiating [closed]
  2. can’t extract data from a structure array c++ [closed]
  3. How to convert a structure to a byte array in C#?
  4. Using C# to check if string contains a string in string array
  5. Is there a performance impact when calling ToList()?
  6. “error: assignment to expression with array type error” when I assign a struct field (C)
  7. Convert json to a C# array?
  8. How do I sort a two-dimensional (rectangular) array in C#?
  9. How do you make an array of structs in C?
  10. How to sum up an array of integers in C#
  11. Two dimensional array slice in C#
  12. Redim Preserve in C#?
  13. Conversion from List to array T[]
  14. finding closest value in an array
  15. Does foreach evaluate the array at every iteration?
  16. Read binary file into a struct
  17. Sorting an array of folder names like Windows Explorer (Numerically and Alphabetically) – VB.NET
  18. The limitation on the size of .Net array
  19. Why is 16 byte the recommended size for struct in C#?
  20. List array duplicates with count
  21. How to get the most common value in an Int array? (C#)
  22. How to get all subsets of an array?
  23. Why does struct alignment depend on whether a field type is primitive or user-defined?
  24. Casting a byte array to a managed structure
  25. C# params object[] strange behavior
  26. Array of size 0 at the end of struct [duplicate]
  27. How to delete a chosen element in array?
  28. Passing array to a SQL Server Stored Procedure
  29. Unable to change array size in Inspector variable in Unity?
  30. When to use ArrayList over array[] in c#?

Leave a Comment