El método BitConverter.ToInt32(Byte[], Int32) se usa para devolver un entero con signo de 32 bits convertido a partir de cuatro bytes en una posición específica en una array de bytes.
Sintaxis:
public static int ToInt32 (byte[] value, int startIndex);
Parámetros:
valor: Es una array de bytes.
startIndex: Es la posición inicial dentro del valor.
Valor devuelto: este método devuelve un entero de 32 bits con signo formado por dos bytes que comienzan en startIndex.
Excepciones:
- ArgumentException: si startIndex es mayor o igual que la longitud del valor menos 3 y es menor o igual que 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.ToInt32(Byte[], Int32) Método:
Ejemplo 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();
}
}
Producción:
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
Ejemplo 2: para 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();
}
}
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 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
Ejemplo 3: para 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();
}
}
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 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
Ejemplo 4: Para 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);
}
}
}
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