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BitVector32.CreateSection Method (Int16)

Creates the first BitVector32.Section in a series of sections that contain small integers.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)

public static BitVector32.Section CreateSection(
	short maxValue
)

Parameters

maxValue
Type: System.Int16

A 16-bit signed integer that specifies the maximum value for the new BitVector32.Section.

Return Value

Type: System.Collections.Specialized.BitVector32.Section
A BitVector32.Section that can hold a number from zero to maxValue.

ExceptionCondition
ArgumentException

maxValue is less than 1.

A BitVector32.Section is a window into the BitVector32 and is composed of the smallest number of consecutive bits that can contain the maximum value specified in CreateSection. For example, a section with a maximum value of 1 is composed of only one bit, whereas a section with a maximum value of 5 is composed of three bits. You can create a BitVector32.Section with a maximum value of 1 to serve as a Boolean, thereby allowing you to store integers and Booleans in the same BitVector32.

If sections already exist in the BitVector32, those sections are still accessible; however, overlapping sections might cause unexpected results.

This method is an O(1) operation.

The following code example uses a BitVector32 as a collection of sections.

using System;
using System.Collections.Specialized;


public class SamplesBitVector32  {

   public static void Main()  {

      // Creates and initializes a BitVector32.
      BitVector32 myBV = new BitVector32( 0 );

      // Creates four sections in the BitVector32 with maximum values 6, 3, 1, and 15. 
      // mySect3, which uses exactly one bit, can also be used as a bit flag.
      BitVector32.Section mySect1 = BitVector32.CreateSection( 6 );
      BitVector32.Section mySect2 = BitVector32.CreateSection( 3, mySect1 );
      BitVector32.Section mySect3 = BitVector32.CreateSection( 1, mySect2 );
      BitVector32.Section mySect4 = BitVector32.CreateSection( 15, mySect3 );

      // Displays the values of the sections.
      Console.WriteLine( "Initial values:" );
      Console.WriteLine( "\tmySect1: {0}", myBV[mySect1] );
      Console.WriteLine( "\tmySect2: {0}", myBV[mySect2] );
      Console.WriteLine( "\tmySect3: {0}", myBV[mySect3] );
      Console.WriteLine( "\tmySect4: {0}", myBV[mySect4] );

      // Sets each section to a new value and displays the value of the BitVector32 at each step.
      Console.WriteLine( "Changing the values of each section:" );
      Console.WriteLine( "\tInitial:    \t{0}", myBV.ToString() );
      myBV[mySect1] = 5;
      Console.WriteLine( "\tmySect1 = 5:\t{0}", myBV.ToString() );
      myBV[mySect2] = 3;
      Console.WriteLine( "\tmySect2 = 3:\t{0}", myBV.ToString() );
      myBV[mySect3] = 1;
      Console.WriteLine( "\tmySect3 = 1:\t{0}", myBV.ToString() );
      myBV[mySect4] = 9;
      Console.WriteLine( "\tmySect4 = 9:\t{0}", myBV.ToString() );

      // Displays the values of the sections.
      Console.WriteLine( "New values:" );
      Console.WriteLine( "\tmySect1: {0}", myBV[mySect1] );
      Console.WriteLine( "\tmySect2: {0}", myBV[mySect2] );
      Console.WriteLine( "\tmySect3: {0}", myBV[mySect3] );
      Console.WriteLine( "\tmySect4: {0}", myBV[mySect4] );

   }

}

/*
This code produces the following output.

Initial values:
        mySect1: 0
        mySect2: 0
        mySect3: 0
        mySect4: 0
Changing the values of each section:
        Initial:        BitVector32{00000000000000000000000000000000}
        mySect1 = 5:    BitVector32{00000000000000000000000000000101}
        mySect2 = 3:    BitVector32{00000000000000000000000000011101}
        mySect3 = 1:    BitVector32{00000000000000000000000000111101}
        mySect4 = 9:    BitVector32{00000000000000000000001001111101}
New values:
        mySect1: 5
        mySect2: 3
        mySect3: 1
        mySect4: 9

*/

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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