C# | BitConverter.ToChar() Method
This method is used to return a Unicode character converted from two bytes at a specified position in a byte array.
Syntax:
public static char ToChar (byte[] value, int startIndex);
Parameters:
value: It is an array.
startIndex: it is the starting position within value.
Return Value: This method returns a character formed by two bytes beginning at startIndex.
Exceptions:
ArgumentException: If the startIndex equals 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.ToChar(Byte[], Int32) Method:
Example 1:
CSHARP
// C# program to demonstrate // BitConverter.ToChar(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 for ( int index = 1; index < bytes.Length - 1; index = index + 2) { char values = BitConverter.ToChar(bytes, index); Console.WriteLine( "index element char" ); Console.WriteLine( " {0} {1} {2}" , index, bytes[index], 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 32 initial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D-20 index element char 1 0 index element char 3 42 * index element char 5 65 A index element char 7 125 } index element char 9 197 ? index element char 11 168 ? index element char 13 41 ? index element char 15 125 ?
Example 2: For ArgumentException
CSHARP
// C# program to demonstrate // BitConverter.ToChar(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 for ( int index = 1; index < bytes.Length; index = index + 2) { if (index == bytes.Length - 1) { Console.WriteLine(); Console.WriteLine( "startIndex equals the " + "length of value minus 1." ); char values = BitConverter.ToChar(bytes, index); } else { char values = BitConverter.ToChar(bytes, index); Console.WriteLine( "index element char" ); Console.WriteLine( " {0} {1} {2}" , index, bytes[index], 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 char 1 0 index element char 3 42 * index element char 5 65 A index element char 7 125 } index element char 9 197 ? index element char 11 168 ? index element char 13 41 ? startIndex equals the length of value minus 1. Exception Thrown: System.ArgumentException
Example 3: For ArgumentOutOfRangeException
CSHARP
// C# program to demonstrate // BitConverter.ToChar(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 for ( int index = 0; index < bytes.Length + 1; index = index + 2) { if (index == bytes.Length) { Console.WriteLine(); Console.WriteLine( "startIndex is greater than " + "the length of value minus 1." ); char values = BitConverter.ToChar(bytes, index); } else { char values = BitConverter.ToChar(bytes, index); Console.WriteLine( "index element char" ); Console.WriteLine( " {0} {1} {2}" , index, bytes[index], 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 char 0 32 index element char 2 0 ? index element char 4 0 ? index element char 6 0 ? index element char 8 0 ? index element char 10 0 ? index element char 12 3 ? index element char 14 4 ? startIndex is greater than the length of value minus 1. Exception Thrown: System.ArgumentOutOfRangeException
Example 4: For ArgumentNullException
CSHARP
// C# program to demonstrate // BitConverter.ToChar(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 char value char values = BitConverter.ToChar(bytes, 0); } 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.tochar?view=netframework-4.7.2
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