Este método se usa para devolver un carácter Unicode convertido a partir de dos bytes en una posición específica en una array de bytes.
Sintaxis:
public static char ToChar (byte[] value, int startIndex);
Parámetros:
valor: Es una array.
startIndex: es la posición inicial dentro del valor.
Valor de retorno: este método devuelve un carácter formado por dos bytes que comienzan en startIndex .
Excepciones:
ArgumentException: si startIndex es igual a la longitud del valor menos 1.
ArgumentNullException: si el valor es nulo.
ArgumentOutOfRangeException: si startIndex es menor que cero o mayor que la longitud del valor menos 1.
Los siguientes programas ilustran el uso de BitConverter.ToChar(Byte[], Int32) Método:
Ejemplo 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();
}
}
Producción:
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 ?
Ejemplo 2: para 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();
}
}
Producción:
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
Ejemplo 3: para 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();
}
}
Producción:
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
Ejemplo 4: Para 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);
}
}
}
Producción:
Exception Thrown: System.ArgumentNullException
Referencia:
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA