BitConverter.ToUInt32 Method

Definition

Namespace:

System

Assemblies:

netstandard.dll, System.Runtime.dll

Overloads

ToUInt32(ReadOnlySpan<Byte>)	Converts a read-only byte span into a 32-bit unsigned integer.
ToUInt32(Byte[], Int32)	Returns a 32-bit unsigned integer converted from four bytes at a specified position in a byte array.

ToUInt32(ReadOnlySpan<Byte>)

Source:

BitConverter.cs

Important

This API is not CLS-compliant.

Converts a read-only byte span into a 32-bit unsigned integer.

C#

[System.CLSCompliant(false)]
public static uint ToUInt32(ReadOnlySpan<byte> value);

Parameters

value

ReadOnlySpan<Byte>

A read-only span containing the bytes to convert.

Returns

UInt32

A 32-bit unsigned integer representing the converted bytes.

Attributes

CLSCompliantAttribute

Exceptions

ArgumentOutOfRangeException

The length of value is less than 4.

ToUInt32(Byte[], Int32)

Source:

BitConverter.cs

Important

This API is not CLS-compliant.

Returns a 32-bit unsigned integer converted from four bytes at a specified position in a byte array.

C#

[System.CLSCompliant(false)]
public static uint ToUInt32(byte[] value, int startIndex);

Parameters

value

Byte[]

An array of bytes.

startIndex

Int32

The starting position within value.

Returns

UInt32

A 32-bit unsigned integer formed by four bytes beginning at startIndex.

Attributes

CLSCompliantAttribute

Exceptions

ArgumentException

startIndex is greater than or equal to the length of value minus 3, and is less than or equal to the length of value minus 1.

ArgumentNullException

value is null.

ArgumentOutOfRangeException

startIndex is less than zero or greater than the length of value minus 1.

Examples

The following code example converts elements of Byte arrays to UInt32 values with the ToUInt32 method.

C#

// Example of the BitConverter.ToUInt32 method.
using System;

class BytesToUInt32Demo
{
    const string formatter = "{0,5}{1,17}{2,15}";

    // Convert four byte array elements to a uint and display it.
    public static void BAToUInt32( byte[ ] bytes, int index )
    {
        uint value = BitConverter.ToUInt32( bytes, index );

        Console.WriteLine( formatter, index,
            BitConverter.ToString( bytes, index, 4 ), value );
    }

    public static void Main( )
    {
        byte[ ] byteArray = {
             15,   0,   0,   0,   0,  16,   0, 255,   3,   0,
              0, 202, 154,  59, 255, 255, 255, 255, 127 };

        Console.WriteLine(
            "This example of the BitConverter.ToUInt32( byte[ ], " +
            "int ) \nmethod generates the following output. It " +
            "converts elements \nof a byte array to uint values.\n" );
        Console.WriteLine( "initial byte array" );
        Console.WriteLine( "------------------" );
        Console.WriteLine( BitConverter.ToString( byteArray ) );
        Console.WriteLine( );
        Console.WriteLine( formatter, "index", "array elements",
            "uint" );
        Console.WriteLine( formatter, "-----", "--------------",
            "----" );

        // Convert byte array elements to uint values.
        BAToUInt32( byteArray, 1 );
        BAToUInt32( byteArray, 0 );
        BAToUInt32( byteArray, 7 );
        BAToUInt32( byteArray, 3 );
        BAToUInt32( byteArray, 10 );
        BAToUInt32( byteArray, 15 );
        BAToUInt32( byteArray, 14 );
    }
}

/*
This example of the BitConverter.ToUInt32( byte[ ], int )
method generates the following output. It converts elements
of a byte array to uint values.

initial byte array
------------------
0F-00-00-00-00-10-00-FF-03-00-00-CA-9A-3B-FF-FF-FF-FF-7F

index   array elements           uint
-----   --------------           ----
    1      00-00-00-00              0
    0      0F-00-00-00             15
    7      FF-03-00-00           1023
    3      00-00-10-00        1048576
   10      00-CA-9A-3B     1000000000
   15      FF-FF-FF-7F     2147483647
   14      FF-FF-FF-FF     4294967295
*/

Remarks

The ToUInt32 method converts the bytes from index startIndex to startIndex + 3 to a UInt32 value. The order of bytes in the array must reflect the endianness of the computer system's architecture. For more information, see the Remarks section of the BitConverter class topic.

See also

• GetBytes(UInt32)