VB.Net - SortedList
排序列表是数组和散列表的组合。 它包含可以使用键或索引访问的项目列表。 如果您使用索引访问项目,它是一个ArrayList,如果您使用键访问项目,它是一个Hashtable。 项目的集合始终按键值排序。
SortedList类的属性和方法
属性 | 描述 |
---|---|
Capacity | Gets or sets the capacity of the SortedList. 获取或设置SortedList的容量。 |
Count | Gets the number of elements contained in the SortedList. 获取SortedList中包含的元素数。 |
IsFixedSize | Gets a value indicating whether the SortedList has a fixed size. 获取指示SortedList是否具有固定大小的值。 |
IsReadOnly | Gets a value indicating whether the SortedList is read-only. 获取指示SortedList是否为只读的值。 |
Item | Gets and sets the value associated with a specific key in the SortedList. 获取并设置与SortedList中的特定键相关联的值。 |
Keys | Gets the keys in the SortedList. 获取SortedList中的键。 |
Values | Gets the values in the SortedList. 获取SortedList中的值。 |
S.N | 方法名称和用途 |
---|---|
1 | Public Overridable Sub Add (key As Object, value As Object) Adds an element with the specified key and value into the SortedList. 将带有指定的键和值的元素添加到可排序列表。 |
2 | Public Overridable Sub Clear Removes all elements from the SortedList.、 从SortedList中删除所有元素。 |
3 | Public Overridable Function ContainsKey (key As Object) As Boolean Determines whether the SortedList contains a specific key. 确定SortedList是否包含特定键。 |
4 | Public Overridable Function ContainsValue (value As Object) As Boolean Determines whether the SortedList contains a specific value. 确定SortedList是否包含特定值。 |
5 | Public Overridable Function GetByIndex (index As Integer) As Object Gets the value at the specified index of the SortedList. 获取SortedList的指定索引处的值。 |
6 | Public Overridable Function GetKey (index As Integer) As Object Gets the key at the specified index of the SortedList. 获取SortedList的指定索引处的键。 |
7 | Public Overridable Function GetKeyList As IList Gets the keys in the SortedList. 获取SortedList中的键。 |
8 | Public Overridable Function GetValueList As IList Gets the values in the SortedList. 获取SortedList中的值。 |
9 | Public Overridable Function IndexOfKey (key As Object) As Integer Returns the zero-based index of the specified key in the SortedList. 返回SortedList中指定键的从零开始的索引。 |
10 | Public Overridable Function IndexOfValue (value As Object ) As Integer Returns the zero-based index of the first occurrence of the specified value in the SortedList. 返回SortedList中指定值的第一次出现的从零开始的索引。 |
11 | Public Overridable Sub Remove (key As Object) Removes the element with the specified key from the SortedList. 从SortedList中删除具有指定键的元素。 |
12 | Public Overridable Sub RemoveAt (index As Integer) Removes the element at the specified index of SortedList. 删除SortedList的指定索引处的元素。 |
13 | Public Overridable Sub TrimToSize Sets the capacity to the actual number of elements in the SortedList. 将容量设置为SortedList中的实际元素数。 |
示例:
Module collections Sub Main() Dim sl As SortedList = New SortedList() sl.Add("001", "Zara Ali") sl.Add("002", "Abida Rehman") sl.Add("003", "Joe Holzner") sl.Add("004", "Mausam Benazir Nur") sl.Add("005", "M. Amlan") sl.Add("006", "M. Arif") sl.Add("007", "Ritesh Saikia") If (sl.ContainsValue("Nuha Ali")) Then Console.WriteLine("This student name is already in the list") Else sl.Add("008", "Nuha Ali") End If ' Get a collection of the keys. Dim key As ICollection = sl.Keys Dim k As String For Each k In key Console.WriteLine(" {0} : {1}", k, sl(k)) Next k Console.ReadKey() End Sub End Module
001: Zara Ali 002: Abida Rehman 003: Joe Holzner 004: Mausam Banazir Nur 005: M. Amlan 006: M. Arif 007: Ritesh Saikia 008: Nuha Ali
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