SortedSet类按排序顺序表示对象的集合。此类位于System.Collections.Generic命名空间下。
特征：
- 在C＃中，SortedSet类可用于存储，删除或查看元素。
- 它保持升序，并且不存储重复的元素。
- 如果必须存储唯一元素并保持升序，建议使用SortedSet类。
建设者
| Constructor | Description |
|---|---|
| SortedSet() | Initializes a new instance of the SortedSet class. |
| SortedSet(IComparer) | Initializes a new instance of the SortedSet class that uses a specified comparer. |
| SortedSet(IEnumerable) | Initializes a new instance of the SortedSet class that contains elements copied from a specified enumerable collection. |
| SortedSet(IEnumerable, IComparer) | Initializes a new instance of the SortedSet class that contains elements copied from a specified enumerable collection and that uses a specified comparer. |
| SortedSet(SerializationInfo, StreamingContext) | Initializes a new instance of the SortedSet class that contains serialized data. |
例子：
// C# code to create a SortedSet
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a SortedSet of integers
SortedSet mySortedSet = new SortedSet();
// Adding elements in mySortedSet
for (int i = 1; i <= 6; i++) {
mySortedSet.Add(2 * i + 1);
}
// Displaying elements in mySortedSet
Console.WriteLine("The elements in mySortedSet are : ");
// Displaying the element in mySortedSet
foreach(int i in mySortedSet)
{
Console.WriteLine(i);
}
}
}
输出：
The elements in mySortedSet are :
3
5
7
9
11
13
特性
| Property | Description |
|---|---|
| Comparer | Gets the IComparer object that is used to order the values in the SortedSet. |
| Count | Gets the number of elements in the SortedSet. |
| Max | Gets the maximum value in the SortedSet, as defined by the comparer. |
| Min | Gets the minimum value in the SortedSet, as defined by the comparer. |
例子：
// C# code to illustrate the properties
// of SortedSet Class
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a SortedSet of integers
SortedSet mySortedSet = new SortedSet();
// adding elements in mySortedSet
mySortedSet.Add(1);
mySortedSet.Add(2);
mySortedSet.Add(3);
mySortedSet.Add(4);
mySortedSet.Add(5);
// ------ Count property ----------
// Displaying the number of elements in
// the SortedSet using "Count" property
Console.WriteLine("The number of elements in mySortedSet are: "
+ mySortedSet.Count);
// ---------- Min property ----------
// Displaying the minimum value in the SortedSet
Console.WriteLine("The minimum element in SortedSet is : "
+ mySortedSet.Min);
}
}
输出：
The number of elements in mySortedSet are: 5
The minimum element in SortedSet is : 1
方法
| Method | Description |
|---|---|
| Add(T) | Adds an element to the set and returns a value that indicates if it was successfully added. |
| Clear() | Removes all elements from the set. |
| Contains(T) | Determines whether the set contains a specific element. |
| CopyTo() | Copies a portion or all of a SortedSet |
| CreateSetComparer() | Returns an IEqualityComparer object that can be used to create a collection that contains individual sets. |
| CreateSetComparer(IEqualityComparer) | Returns an IEqualityComparer object, according to a specified comparer, that can be used to create a collection that contains individual sets. |
| Equals(Object) | Determines whether the specified object is equal to the current object. |
| ExceptWith(IEnumerable) | Removes all elements that are in a specified collection from the current SortedSet object. |
| GetEnumerator() | Returns an enumerator that iterates through the SortedSet. |
| GetHashCode() | Serves as the default hash function. |
| GetObjectData(SerializationInfo, StreamingContext) | Implements the ISerializable interface and returns the data that you must have to serialize a SortedSet object. |
| GetType() | Gets the Type of the current instance. |
| GetViewBetween(T, T) | Returns a view of a subset in a SortedSet. |
| IntersectWith(IEnumerable) | Modifies the current SortedSet object so that it contains only elements that are also in a specified collection. |
| IsProperSubsetOf(IEnumerable) | Determines whether a SortedSet object is a proper subset of the specified collection. |
| IsProperSupersetOf(IEnumerable) | Determines whether a SortedSet object is a proper superset of the specified collection. |
| IsSubsetOf(IEnumerable) | Determines whether a SortedSet object is a subset of the specified collection. |
| IsSupersetOf(IEnumerable) | Determines whether a SortedSet object is a superset of the specified collection. |
| MemberwiseClone() | Creates a shallow copy of the current Object. |
| OnDeserialization(Object) | Implements the ISerializable interface, and raises the deserialization event when the deserialization is completed. |
| Overlaps(IEnumerable) | Determines whether the current SortedSet object and a specified collection share common elements. |
| Remove(T) | Removes a specified item from the SortedSet. |
| RemoveWhere(Predicate) | Removes all elements that match the conditions defined by the specified predicate from a SortedSet. |
| Reverse() | Returns an IEnumerable that iterates over the SortedSet in reverse order. |
| SetEquals(IEnumerable) | Determines whether the current SortedSet object and the specified collection contain the same elements. |
| SymmetricExceptWith(IEnumerable) | Modifies the current SortedSet object so that it contains only elements that are present either in the current object or in the specified collection, but not both. |
| ToString() | Returns a string that represents the current object. |
| TryGetValue(T, T) | Searches the set for a given value and returns the equal value it finds, if any. |
| UnionWith(IEnumerable) | Modifies the current SortedSet object so that it contains all elements that are present in either the current object or the specified collection. |
例子：
// C# code to illustrate the methods
// of SortedSet Class
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a SortedSet of integers
SortedSet mySortedSet = new SortedSet();
// adding elements in mySortedSet
mySortedSet.Add(2);
mySortedSet.Add(4);
mySortedSet.Add(6);
mySortedSet.Add(8);
mySortedSet.Add(10);
//-------- Remove Method --------
// Removing element "4" if found
mySortedSet.Remove(4);
// Displaying the elements in mySortedSet
foreach(int i in mySortedSet)
{
Console.WriteLine(i);
}
Console.WriteLine("After Using Method");
// Removing element "14" if found
mySortedSet.Remove(14);
// Displaying the element in mySortedSet
foreach(int i in mySortedSet)
{
Console.WriteLine(i);
}
// -------- IsSubsetOf Method --------
// Creating a SortedSet of integers
SortedSet mySet2 = new SortedSet();
// Inserting elements in SortedSet
mySet2.Add(3);
mySet2.Add(4);
mySet2.Add(5);
mySet2.Add(6);
// Check if a SortedSet is a subset
// of the specified collection
// It should return false as SortedSet mySet2
// is not a subset of SortedSet mySet1
Console.WriteLine(mySet2.IsSubsetOf(mySortedSet));
}
}
输出：
2
6
8
10
After Using Method
2
6
8
10
False
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.collections.generic.sortedset-1?view=netframework-4.7.2