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C# | BitConverter.ToUInt32 Method
  • Last Updated : 01 Feb, 2019

This method is used to return a 32-bit unsigned integer converted from four bytes at a specified position in a byte array.

Syntax:

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

Parameters:

value: It is an array of bytes.
startIndex: It is the starting position within value.

Return Value: This method returns a 32-bit unsigned integer formed by four bytes beginning at startIndex.



Exceptions:

  • ArgumentException: If the 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: If the value is null.
  • ArgumentOutOfRangeException: If the startIndex is less than zero or greater than the length of value minus 1.

Below programs illustrate the use of BitConverter.ToUInt32 Method:

Example 1:




// C# program to demonstrate
// BitConverter.ToUInt32()
// Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        try {
  
            // Define an array of byte values.
            byte[] bytes = {32, 0, 0, 42, 0, 65,
                            0, 125, 0, 197, 0,
                            168, 3, 41, 4, 125,
                            32};
  
            // Display the values of the myArr.
            Console.Write("Initial Array: ");
  
            // calling the PrintIndexAndValues()
            // method to print
            PrintIndexAndValues(bytes);
  
            // print char value
            Console.WriteLine("index     byte Array"+             
                            "           uint value");
              
            for (int index = 0; index < bytes.Length - 1;
                                    index = index + 4) {
  
                uint values = BitConverter.ToUInt32(bytes, index);
  
                Console.WriteLine("{0}     {1}         {2}",
                       index, BitConverter.ToString(bytes,
                                        index, 4),values);
            }
        }
        catch (ArgumentNullException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
  
    // Defining the method
    // PrintIndexAndValues
    public static void PrintIndexAndValues(byte[] myArr)
    {
        for (int i = 0; i < myArr.Length; i++) {
  
            Console.Write("{0} ", myArr[i]);
        }
  
        Console.WriteLine();
        Console.WriteLine();
    }
}
Output:
Initial Array: 32 0 0 42 0 65 0 125 0 197 0 168 3 41 4 125 32 

index     byte Array           uint value
0     20-00-00-2A         704643104
4     00-41-00-7D         2097168640
8     00-C5-00-A8         2818622720
12     03-29-04-7D         2097424643

Example 2: For ArgumentException




// C# program to demonstrate
// BitConverter.ToUInt32(Byte[], Int32);
// Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        try {
  
            // Define an array of byte values.
            byte[] bytes = {32, 0, 0, 42, 0, 65,
                              0, 125, 0, 197, 0,
                            168, 3, 41, 4, 125};
  
            // Display the values of the myArr.
            Console.Write("Initial Array: ");
  
            // calling the PrintIndexAndValues()
            // method to print
            PrintIndexAndValues(bytes);
  
            // print char value
            Console.WriteLine("index     byte Array"+             
                            "           uint value");
                              
            for (int index = 1; index < bytes.Length - 2;
                                    index = index + 4) {
  
                if (index == bytes.Length - 3) {
  
                    Console.WriteLine();
                    Console.WriteLine("startindex is {0} which is equals to "
                                     + "the length of Array minus 3.",index);
  
                    uint values = BitConverter.ToUInt32(bytes, index);
  
                    Console.WriteLine(" {0}     {1}         {2}",
                           index, BitConverter.ToString(bytes,
                                            index, 4),values);
                }
                  
                else {
                    uint values = BitConverter.ToUInt32(bytes, index);
                    Console.WriteLine(" {0}     {1}         {2}",
                           index, BitConverter.ToString(bytes,
                                           index, 4), values);
                }
            }
        }
        catch (ArgumentNullException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
  
    // Defining the method
    // PrintIndexAndValues
    public static void PrintIndexAndValues(byte[] myArr)
    {
        for (int i = 0; i < myArr.Length; i++) {
  
            Console.Write("{0} ", myArr[i]);
        }
  
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine("intial Array in string: {0} ",
                              BitConverter.ToString(myArr));
        Console.WriteLine();
    }
}
Output:
Initial Array: 32 0 0 42 0 65 0 125 0 197 0 168 3 41 4 125 

intial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D 

index     byte Array           uint value
 1     00-00-2A-00         2752512
 5     41-00-7D-00         8192065
 9     C5-00-A8-03         61341893

startindex is 13 which is equals to the length of Array minus 3.
Exception Thrown: System.ArgumentException

Example 3: For ArgumentOutOfRangeException




// C# program to demonstrate
// BitConverter.ToUInt32(Byte[], Int32);
// Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        try {
  
            // Define an array of byte values.
            byte[] bytes = {32, 0, 0, 42, 0, 
                         65, 0, 125, 0, 197, 
                     0, 168, 3, 41, 4, 125};
  
            // Display the values of the myArr.
            Console.Write("Initial Array: ");
  
            // calling the PrintIndexAndValues()
            // method to print
            PrintIndexAndValues(bytes);
  
             // print value
            Console.WriteLine("index     byte Array"+            
                            "           uint value");
                              
            for (int index = 0; index < bytes.Length + 1;
                                    index = index + 4) {
  
                if (index == bytes.Length) {
  
                    Console.WriteLine();
                    Console.WriteLine("startindex is {0} which is greater than "
                                       + "the length of Array minus 1.", index);
  
                    uint values = BitConverter.ToUInt16(bytes, index);
                      
                    Console.WriteLine(" {0}     {1}         {2}",
                           index, BitConverter.ToString(bytes,
                                           index, 4), values);
                }
  
                else {
                    ushort values = BitConverter.ToUInt16(bytes, index);
                    Console.WriteLine(" {0}     {1}         {2}",
                           index, BitConverter.ToString(bytes,
                                            index, 4), values);
                }
            }
        }
        catch (ArgumentNullException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
  
    // Defining the method
    // PrintIndexAndValues
    public static void PrintIndexAndValues(byte[] myArr)
    {
        for (int i = 0; i < myArr.Length; i++) {
  
            Console.Write("{0} ", myArr[i]);
        }
  
        Console.WriteLine();
        Console.WriteLine();
        Console.WriteLine("intial Array in string: {0} ",
                           BitConverter.ToString(myArr));
        Console.WriteLine();
    }
}
Output:
Initial Array: 32 0 0 42 0 65 0 125 0 197 0 168 3 41 4 125 

intial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D 

index     byte Array           uint value
 0     20-00-00-2A         32
 4     00-41-00-7D         16640
 8     00-C5-00-A8         50432
 12     03-29-04-7D         10499

startindex is 16 which is greater than the length of Array minus 1.
Exception Thrown: System.ArgumentOutOfRangeException

Example 4: For ArgumentNullException




// C# program to demonstrate
// BitConverter.ToUInt32(Byte[], Int32);
// Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        try {
  
            // Define an array of byte values.
            byte[] bytes = null;
  
            // get the uint value
  
            uint values = BitConverter.ToUInt32(bytes, 0);
            Console.Write("{0}", values);
        }
        catch (ArgumentNullException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentException e) {
  
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}
Output:
Exception Thrown: System.ArgumentNullException

Reference:

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