ToUInt32 Method

BitConverter.ToUInt32 Method

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

This API is not CLS-compliant. 

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

[CLSCompliantAttribute(false)]
public static uint ToUInt32(
	byte[] value,
	int startIndex
)

Parameters

value
Type: System.Byte[]
An array of bytes.
startIndex
Type: System.Int32
The starting position within value.

Return Value

Type: System.UInt32
A 32-bit unsigned integer formed by four bytes beginning at startIndex.

ExceptionCondition
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.

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


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

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

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

      outputBlock.Text += String.Format(formatter, index,
          BitConverter.ToString(bytes, index, 4), value) + "\n";
   }

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      byte[] byteArray = {
             15,   0,   0,   0,   0,  16,   0, 255,   3,   0, 
              0, 202, 154,  59, 255, 255, 255, 255, 127 };

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

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


Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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