本文整理汇总了C#中System.Collections.Generic.ICollection<T>接口的典型用法代码示例。如果您正苦于以下问题:C# ICollection<T>接口的具体用法?C# ICollection<T>怎么用?C# ICollection<T>使用的例子?那么恭喜您, 这里精选的接口代码示例或许可以为您提供帮助。
ICollection<T>接口属于System.Collections.Generic命名空间,在下文中一共展示了ICollection<T>接口的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System;
using System.Collections;
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
BoxCollection bxList = new BoxCollection();
bxList.Add(new Box(10, 4, 6));
bxList.Add(new Box(4, 6, 10));
bxList.Add(new Box(6, 10, 4));
bxList.Add(new Box(12, 8, 10));
// Same dimensions. Cannot be added:
bxList.Add(new Box(10, 4, 6));
// Test the Remove method.
Display(bxList);
Console.WriteLine("Removing 6x10x4");
bxList.Remove(new Box(6, 10, 4));
Display(bxList);
// Test the Contains method.
Box BoxCheck = new Box(8, 12, 10);
Console.WriteLine("Contains {0}x{1}x{2} by dimensions: {3}",
BoxCheck.Height.ToString(), BoxCheck.Length.ToString(),
BoxCheck.Width.ToString(), bxList.Contains(BoxCheck).ToString());
// Test the Contains method overload with a specified equality comparer.
Console.WriteLine("Contains {0}x{1}x{2} by volume: {3}",
BoxCheck.Height.ToString(), BoxCheck.Length.ToString(),
BoxCheck.Width.ToString(), bxList.Contains(BoxCheck,
new BoxSameVol()).ToString());
}
public static void Display(BoxCollection bxList)
{
Console.WriteLine("\nHeight\tLength\tWidth\tHash Code");
foreach (Box bx in bxList)
{
Console.WriteLine("{0}\t{1}\t{2}\t{3}",
bx.Height.ToString(), bx.Length.ToString(),
bx.Width.ToString(), bx.GetHashCode().ToString());
}
// Results by manipulating the enumerator directly:
//IEnumerator enumerator = bxList.GetEnumerator();
//Console.WriteLine("\nHeight\tLength\tWidth\tHash Code");
//while (enumerator.MoveNext())
//{
// Box b = (Box)enumerator.Current;
// Console.WriteLine("{0}\t{1}\t{2}\t{3}",
// b.Height.ToString(), b.Length.ToString(),
// b.Width.ToString(), b.GetHashCode().ToString());
//}
Console.WriteLine();
}
}
public class Box : IEquatable<Box>
{
public Box(int h, int l, int w)
{
this.Height = h;
this.Length = l;
this.Width = w;
}
public int Height { get; set; }
public int Length { get; set; }
public int Width { get; set; }
// Defines equality using the
// BoxSameDimensions equality comparer.
public bool Equals(Box other)
{
if (new BoxSameDimensions().Equals(this, other))
{
return true;
}
else
{
return false;
}
}
public override bool Equals(object obj)
{
return base.Equals(obj);
}
public override int GetHashCode()
{
return base.GetHashCode();
}
}
public class BoxCollection : ICollection<Box>
{
// The generic enumerator obtained from IEnumerator<Box>
// by GetEnumerator can also be used with the non-generic IEnumerator.
// To avoid a naming conflict, the non-generic IEnumerable method
// is explicitly implemented.
public IEnumerator<Box> GetEnumerator()
{
return new BoxEnumerator(this);
}
IEnumerator IEnumerable.GetEnumerator()
{
return new BoxEnumerator(this);
}
// The inner collection to store objects.
private List<Box> innerCol;
public BoxCollection()
{
innerCol = new List<Box>();
}
// Adds an index to the collection.
public Box this[int index]
{
get { return (Box)innerCol[index]; }
set { innerCol[index] = value; }
}
// Determines if an item is in the collection
// by using the BoxSameDimensions equality comparer.
public bool Contains(Box item)
{
bool found = false;
foreach (Box bx in innerCol)
{
// Equality defined by the Box
// class's implmentation of IEquatable<T>.
if (bx.Equals(item))
{
found = true;
}
}
return found;
}
// Determines if an item is in the
// collection by using a specified equality comparer.
public bool Contains(Box item, EqualityComparer<Box> comp)
{
bool found = false;
foreach (Box bx in innerCol)
{
if (comp.Equals(bx, item))
{
found = true;
}
}
return found;
}
// Adds an item if it is not already in the collection
// as determined by calling the Contains method.
public void Add(Box item)
{
if (!Contains(item))
{
innerCol.Add(item);
}
else
{
Console.WriteLine("A box with {0}x{1}x{2} dimensions was already added to the collection.",
item.Height.ToString(), item.Length.ToString(), item.Width.ToString());
}
}
public void Clear()
{
innerCol.Clear();
}
public void CopyTo(Box[] array, int arrayIndex)
{
if (array == null)
throw new ArgumentNullException("The array cannot be null.");
if (arrayIndex < 0)
throw new ArgumentOutOfRangeException("The starting array index cannot be negative.");
if (Count > array.Length - arrayIndex + 1)
throw new ArgumentException("The destination array has fewer elements than the collection.");
for (int i = 0; i < innerCol.Count; i++) {
array[i + arrayIndex] = innerCol[i];
}
}
public int Count
{
get
{
return innerCol.Count;
}
}
public bool IsReadOnly
{
get { return false; }
}
public bool Remove(Box item)
{
bool result = false;
// Iterate the inner collection to
// find the box to be removed.
for (int i = 0; i < innerCol.Count; i++)
{
Box curBox = (Box)innerCol[i];
if (new BoxSameDimensions().Equals(curBox, item))
{
innerCol.RemoveAt(i);
result = true;
break;
}
}
return result;
}
}
// Defines the enumerator for the Boxes collection.
// (Some prefer this class nested in the collection class.)
public class BoxEnumerator : IEnumerator<Box>
{
private BoxCollection _collection;
private int curIndex;
private Box curBox;
public BoxEnumerator(BoxCollection collection)
{
_collection = collection;
curIndex = -1;
curBox = default(Box);
}
public bool MoveNext()
{
//Avoids going beyond the end of the collection.
if (++curIndex >= _collection.Count)
{
return false;
}
else
{
// Set current box to next item in collection.
curBox = _collection[curIndex];
}
return true;
}
public void Reset() { curIndex = -1; }
void IDisposable.Dispose() { }
public Box Current
{
get { return curBox; }
}
object IEnumerator.Current
{
get { return Current; }
}
}
// Defines two boxes as equal if they have the same dimensions.
public class BoxSameDimensions : EqualityComparer<Box>
{
public override bool Equals(Box b1, Box b2)
{
if (b1.Height == b2.Height && b1.Length == b2.Length
&& b1.Width == b2.Width)
{
return true;
}
else
{
return false;
}
}
public override int GetHashCode(Box bx)
{
int hCode = bx.Height ^ bx.Length ^ bx.Width;
return hCode.GetHashCode();
}
}
// Defines two boxes as equal if they have the same volume.
public class BoxSameVol : EqualityComparer<Box>
{
public override bool Equals(Box b1, Box b2)
{
if ((b1.Height * b1.Length * b1.Width) ==
(b2.Height * b2.Length * b2.Width))
{
return true;
}
else
{
return false;
}
}
public override int GetHashCode(Box bx)
{
int hCode = bx.Height ^ bx.Length ^ bx.Width;
Console.WriteLine("HC: {0}", hCode.GetHashCode());
return hCode.GetHashCode();
}
}
输出:
================================================ A box with 10x4x6 dimensions was already added to the collection. Height Length Width Hash Code 10 4 6 46104728 4 6 10 12289376 6 10 4 43495525 12 8 10 55915408 Removing 6x10x4 Height Length Width Hash Code 10 4 6 46104728 4 6 10 12289376 12 8 10 55915408 Contains 8x12x10 by dimensions: False Contains 8x12x10 by volume: True