ilist

问题 I have a very simple class: People: class People { private string LastName = null; private string FirstName = null; private string Status = null; public string lastName { get { return LastName; } set { LastName = value; } } public string firstName { get { return FirstName; } set { FirstName = value; } } public string status { get { return Status; } set { Status = value; } } public People(string lastName, string firstName, string status) { LastName = lastName; FirstName = firstName; Status =

问题 I have a very simple class: People: class People { private string LastName = null; private string FirstName = null; private string Status = null; public string lastName { get { return LastName; } set { LastName = value; } } public string firstName { get { return FirstName; } set { FirstName = value; } } public string status { get { return Status; } set { Status = value; } } public People(string lastName, string firstName, string status) { LastName = lastName; FirstName = firstName; Status =

问题 This question already has answers here : Why does List<T> implement IList<T>, ICollection<T> and IEnumerable<T>? (4 answers) Closed 4 years ago . Why is IList defined like this? public interface IList<T> : ICollection<T>, IEnumerable<T>, IEnumerable public interface ICollection<T> : IEnumerable<T>, IEnumerable public interface IEnumerable<T> : IEnumerable Couldn't it just be public interface IList<T> : ICollection<T> So, to test I created these interfaces, just to be sure if that works!

问题 This question already has answers here : Why does List<T> implement IList<T>, ICollection<T> and IEnumerable<T>? (4 answers) Closed 4 years ago . Why is IList defined like this? public interface IList<T> : ICollection<T>, IEnumerable<T>, IEnumerable public interface ICollection<T> : IEnumerable<T>, IEnumerable public interface IEnumerable<T> : IEnumerable Couldn't it just be public interface IList<T> : ICollection<T> So, to test I created these interfaces, just to be sure if that works!

问题 This question already has answers here : Why does List<T> implement IList<T>, ICollection<T> and IEnumerable<T>? (4 answers) Closed 4 years ago . Why is IList defined like this? public interface IList<T> : ICollection<T>, IEnumerable<T>, IEnumerable public interface ICollection<T> : IEnumerable<T>, IEnumerable public interface IEnumerable<T> : IEnumerable Couldn't it just be public interface IList<T> : ICollection<T> So, to test I created these interfaces, just to be sure if that works!

问题 Must .NET's IList be finite? Suppose I write a class FibonacciList implementing IList<BigInteger> The property Item[n] returns the nth Fibonacci number. The property IsReadOnly returns true. The methods IndexOf and Contains we can implement easily enough because the Fibonacci sequence is increasing - to test if the number m is Fibonacci, we need only to compute the finite sequence of Fibonacci numbers up to m. The method GetEnumerator() doing the right thing We've now implemented all the

问题 I need to allocate very large arrays of simple structs (1 GB RAM). After a few allocations/deallocations the memory becomes fragmented and an OutOfMemory exception is thrown. This is under 32 bit. I'd rather not use 64 bit due to the performance penalty I get - the same application runs 30% slower in 64 bit mode. Are you aware of some implementations of IList compatible arrays which allocate memory in chunks and not all at once? That would avoid my memory fragmentation problem. 回答1: Josh

问题 I have an IList<string> returning from a function (as variable lst) and I set and then I this.dataGridView1.DataSource = lst; The datagrid adds one column labelled Length and then lists the length of each string. How do I make it just list the strings? 回答1: You really need a list of objects that have a string property. With .NET 3.5 you could cheat: .DataSource = list.Select(x=>new {Value = x}).ToList(); Otherwise create a dummy class and copy the data in manually... 回答2: This is because

问题 What is the difference between IEnumerable and IEnumerable<T> ? I've seen many framework classes implementing both these interfaces, therefore I would like to know what advantages one get by implementing both? Please have a look how they've been defined: public interface IEnumerable { [DispId(-4)] IEnumerator GetEnumerator(); } public interface IEnumerable<T> : IEnumerable { IEnumerator<T> GetEnumerator(); } As we see, IEnumerable<T> derives from IEnumerable , that means whatever IEnumerable

问题 What is the correct syntax for this: IList<string> names = "Tom,Scott,Bob".Split(',').ToList<string>().Reverse(); What am I messing up? What does TSource mean? 回答1: The problem is that you're calling List<T>.Reverse() which returns void . You could either do: List<string> names = "Tom,Scott,Bob".Split(',').ToList<string>(); names.Reverse(); or: IList<string> names = "Tom,Scott,Bob".Split(',').Reverse().ToList<string>(); The latter is more expensive, as reversing an arbitrary IEnumerable<T>