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The foundation of BitArray can be seen by rookie programming.

The BitArray class manages a compact array of bit values represented by Boolean values, where the true bit is on (1) and the false bit is off (0).

Use a point array when you need to store bits but do not know the number of bits in advance. You can access items from the dot array collection using an integer index, starting from scratch.

Methods and properties of the BitArray class

The following table lists some common properties of the BitArray class:

Attribute description Count gets the number of elements contained in the BitArray. IsReadOnly gets a value indicating whether BitArray is read-only. Item gets or sets the value of the bit at the specified position in the BitArray. Length gets or sets the number of elements in the BitArray.

The following table lists some common methods of the BitArray class:

Serial number method name & description 1public BitArray And (BitArray value)

Performs bitwise and operations on the elements in the current BitArray and the corresponding elements in the specified BitArray. 2public bool Get (int index)

Gets the value of the bit at the specified position in the BitArray. 3public BitArray Not ()

Reverses the bit value in the current BitArray so that the element set to true becomes false and the element set to false becomes true. 4public BitArray Or (BitArray value)

Performs bitwise or operations on elements in the current BitArray and corresponding elements in the specified BitArray. 5public void Set (int index, bool value)

Sets the bit at the specified position in the BitArray to the specified value. 6public void SetAll (bool value)

Sets all bits in BitArray to the specified value. 7public BitArray Xor (BitArray value)

Performs bitwise XOR operations on elements in the current BitArray and corresponding elements in the specified BitArray.

After getting a general idea of BitArray, let's convert BitArray to Int and string.

Transforming BitArray into Int method

/ Point matrix is converted to int/// public static int BitArrayToInt (BitArray bit) {int [] res = new int [1]; for (int I = 0; I < bit.Count; iTunes +) {bit.CopyTo (res, 0);} return res [0];}

Convert BitArray to string method (if there is garbled code, please modify the code yourself)

/ Point matrix is converted to string/// public static string BitArrayToStr (BitArray ba) {byte [] strArr = new byte [ba.Length / 8]; for (int I = 0; I < ba.Length / 8; iTunes +) {for (int index = I * 8, m = 1; index < I * 8 + 8; index++, m * = 2) {strArr [I] + = ba.Get (index)? (byte) m: (byte) 0;}} return Encoding.Default.GetString (strArr);}

Invoke the test on LinqPad (Dump is the output method of LinqPad):

Void Main () {var bi = new BitArray (new bool [] {true, false, true, false, false}); bool [] bs = bi.Cast (). ToArray (); / / directly into the bool array, but this result is meaningless BitArrayToInt (bi) .dump ("point matrix to int:"); / / point matrix to int BitArrayToStr (bi) .dump ("point matrix to string:") / / Point matrix to string / / Test converts the string to point matrix and then back to the string var str = "Tao Shen"; / / Point matrix only supports bool [], byte [], int [], so the string needs to be converted to byte [] byte [] byteArray = System.Text.Encoding.Default.GetBytes (str); var ba = new BitArray (byteArray) / / create a point matrix BitArrayToStr (ba) .dump ("convert point matrix to string:"); / / convert point matrix to string}

Results:

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