C# | BitConverter.ToInt32() Method
BitConverter.ToInt32(Byte[], Int32) Method is used to return a 32-bit signed integer converted from four bytes at a specified position in a byte array.
Syntax:
public static int ToInt32 (byte[] value, int startIndex);
Parameters:
value: It is an array of bytes.
startIndex: It is the starting position within the value.
Return Value: This method returns a 32-bit signed integer formed by two 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.ToInt32(Byte[], Int32) Method:
Example 1:
CSHARP
// C# program to demonstrate // BitConverter.ToInt32(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, 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 int value" ); for ( int index = 0; index < bytes.Length - 3; index = index + 4) { int values = BitConverter.ToInt16(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 int value 0 20-00-00-2A 32 4 00-41-00-7D 16640 8 00-C5-00-A8 -15104 12 03-29-04-7D 10499
Example 2: For ArgumentException
CSHARP
// C# program to demonstrate // BitConverter.ToInt32(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 element int value" ); for ( int index = 1; index < bytes.Length - 2; index = index + 4) { if (index == bytes.Length - 3) { Console.WriteLine(); Console.WriteLine( "startIndex equals the " + "length of value minus 3." ); int values = BitConverter.ToInt32(bytes, index); Console.WriteLine( " {0} {1} {2}" , index, BitConverter.ToString(bytes, index, 4), values); } else { int values = BitConverter.ToInt32(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( "initial 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 initial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D index element int value 1 00-00-2A-00 2752512 5 41-00-7D-00 8192065 9 C5-00-A8-03 61341893 startIndex equals the length of value minus 3. Exception Thrown: System.ArgumentException
Example 3: For ArgumentOutOfRangeException
CSHARP
// C# program to demonstrate // BitConverter.ToInt32(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 element int value" ); for ( int index = 0; index < bytes.Length + 1; index = index + 4) { if (index == bytes.Length) { Console.WriteLine(); Console.WriteLine( "startIndex is greater than " + "the length of value minus 1" ); int values = BitConverter.ToInt32(bytes, index); Console.WriteLine( " {0} {1} {2}" , index, BitConverter.ToString(bytes, index, 4), values); } else { int values = BitConverter.ToInt32(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( "initial 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 initial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D index element int value 0 20-00-00-2A 704643104 4 00-41-00-7D 2097168640 8 00-C5-00-A8 -1476344576 12 03-29-04-7D 2097424643 startIndex is greater than the length of value minus 1 Exception Thrown: System.ArgumentOutOfRangeException
Example 4: For ArgumentNullException
CSHARP
// C# program to demonstrate // BitConverter.ToInt32(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 int value int values = BitConverter.ToInt32(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:
- https://docs.microsoft.com/en-us/dotnet/api/system.bitconverter.toint32?view=netframework-4.7.2
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