VB.Net BitArray
VB.Net 集合BitArray类管理位值的压缩数组，它表示为布尔值，其中true表示该位为（1），false表示位为off（0）。
它用于需要存储位但不提前知道位数。 您可以通过使用从零开始的整数索引来访问BitArray集合中的项目。
BitArray类的属性和方法
下表列出了BitArray类的一些常用属性：
| 属性 | 描述 |
|---|---|
| Count | Gets the number of elements contained in the BitArray. 获取BitArray中包含的元素数。 |
| IsReadOnly | Gets a value indicating whether the BitArray is read-only. 获取一个指示BitArray是否为只读的值。 |
| Item | Gets or sets the value of the bit at a specific position in the BitArray. 获取或设置位在BitArray中特定位置的值。 |
| Length | Gets or sets the number of elements in the BitArray. 获取或设置BitArray中的元素数。 |
| S.N | 方法名称和用途 |
|---|---|
| 1 |
Public Function And (value As BitArray) As BitArray Performs the bitwise AND operation on the elements in the current BitArray against the corresponding elements in the specified BitArray. 对当前BitArray中的元素与指定的BitArray中的相应元素执行按位AND运算。 |
| 2 |
Public Function Get (index As Integer) As Boolean Gets the value of the bit at a specific position in the BitArray. 获取位在BitArray中特定位置的值。 |
| 3 |
Public Function Not As BitArray Inverts all the bit values in the current BitArray, so that elements set to true are changed to false, and elements set to false are changed to true. 反转当前BitArray中的所有位值，以便将设置为true的元素更改为false，将设置为false的元素更改为true。 |
| 4 |
Public Function Or (value As BitArray) As BitArray Performs the bitwise OR operation on the elements in the current BitArray against the corresponding elements in the specified BitArray. 对当前BitArray中的元素与指定的BitArray中的相应元素执行按位或运算。 |
| 5 |
Public Sub Set (index As Integer, value As Boolean ) Sets the bit at a specific position in the BitArray to the specified value. 将BitArray中特定位置的位设置为指定值。 |
| 6 |
Public Sub SetAll (value As Boolean) Sets all bits in the BitArray to the specified value. 将BitArray中的所有位设置为指定的值。 |
| 7 |
Public Function Xor (value As BitArray) As BitArray Performs the bitwise eXclusive OR operation on the elements in the current BitArray against the corresponding elements in the specified BitArray. 对当前BitArray中的元素与指定的BitArray中的相应元素执行逐位异或操作。 |
示例：
Module collections Sub Main() 'creating two bit arrays of size 8 Dim ba1 As BitArray = New BitArray(8) Dim ba2 As BitArray = New BitArray(8) Dim a() As Byte = {60} Dim b() As Byte = {13} 'storing the values 60, and 13 into the bit arrays ba1 = New BitArray(a) ba2 = New BitArray(b) 'content of ba1 Console.WriteLine("Bit array ba1: 60") Dim i As Integer For i = 0 To ba1.Count Console.Write("{0 } ", ba1(i)) Next i Console.WriteLine() 'content of ba2 Console.WriteLine("Bit array ba2: 13") For i = 0 To ba2.Count Console.Write("{0 } ", ba2(i)) Next i Console.WriteLine() Dim ba3 As BitArray = New BitArray(8) ba3 = ba1.And(ba2) 'content of ba3 Console.WriteLine("Bit array ba3 after AND operation: 12") For i = 0 To ba3.Count Console.Write("{0 } ", ba3(i)) Next i Console.WriteLine() ba3 = ba1.Or(ba2) 'content of ba3 Console.WriteLine("Bit array ba3 after OR operation: 61") For i = 0 To ba3.Count Console.Write("{0 } ", ba3(i)) Next i Console.WriteLine() Console.ReadKey() End Sub End Module
Bit array ba1: 60 False False True True True True False False Bit array ba2: 13 True False True True False False False False Bit array ba3 after AND operation: 12 False False True True False False False False Bit array ba3 after OR operation: 61 True False True True False False False False
