Este método se usa para devolver un entero con signo de 64 bits convertido a partir de ocho bytes en una posición específica en una array de bytes.
Sintaxis:
public static long ToInt64 (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 con signo de 64 bits formado por dos bytes que comienzan en startIndex .
Excepciones:
- ArgumentException: si startIndex es mayor o igual que la longitud del valor menos 7 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.ToInt64(Byte[], Int32) Método:
Ejemplo 1:
CSHARP
// C# program to demonstrate
// BitConverter.ToInt64(Byte[], Int32);
// Method
using System;
public 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"+
" long value");
for (int index = 0; index < bytes.Length - 7;
index = index + 8) {
long values = BitConverter.ToInt64(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes,
index, 8), 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 long value 0 20-00-00-2A-00-41-00-7D 9007270723701440544 8 00-C5-00-A8-03-29-04-7D 9008370250328098048
Ejemplo 2: para ArgumentException
CSHARP
// C# program to demonstrate
// BitConverter.ToInt64(Byte[], Int32);
// Method
using System;
public 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"+
" float value");
for (int index = 1; index < bytes.Length - 6;
index = index + 8) {
if (index == bytes.Length - 7) {
Console.WriteLine();
Console.WriteLine("startindex is {0} which is equals"+
" to the length of Array minus 7.", index);
long values = BitConverter.ToInt64(bytes, index);
Console.WriteLine(" {0} {1} {2}", index,
BitConverter.ToString(bytes,
index, 8), values);
}
else {
long values = BitConverter.ToInt64(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes,
index, 8), 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 float value 1 00-00-2A-00-41-00-7D-00 35184651264458752 startindex is 9 which is equals to the length of Array minus 7. Exception Thrown: System.ArgumentException
Ejemplo 3: para ArgumentOutOfRangeException
CSHARP
// C# program to demonstrate
// BitConverter.ToInt64(Byte[], Int32);
// Method
using System;
public 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"+
" float value");
for (int index = 0; index < bytes.Length + 1;
index = index + 8) {
if (index == bytes.Length) {
Console.WriteLine();
Console.WriteLine("startindex is {0} which is greater"+
" than the Length of array minus 1", index);
long values = BitConverter.ToInt64(bytes, index);
Console.WriteLine(" {0} {1} {2}", index,
BitConverter.ToString(bytes,
index, 8), values);
}
else {
long values = BitConverter.ToInt64(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes,
index, 8), 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 float value 0 20-00-00-2A-00-41-00-7D 9007270723701440544 8 00-C5-00-A8-03-29-04-7D 9008370250328098048 startindex is 16 which is greater than the Length of array minus 1 Exception Thrown: System.ArgumentOutOfRangeException
Ejemplo 4: Para ArgumentNullException
CSHARP
// C# program to demonstrate
// BitConverter.ToInt64(Byte[], Int32);
// Method
using System;
public class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = null;
// get the long value
long values = BitConverter.ToInt64(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