Este método se usa para indicar si el objeto Char en la posición especificada en una string es un sustituto bajo o no.
Sintaxis:
public static bool IsLowSurrogate (string s, int index);
Parámetros:
s : es una string.
index : Es la posición del carácter a evaluar en s .
Valor devuelto: este método devuelve verdadero si el valor numérico del carácter especificado en el parámetro sU+DC00 va desde hasta , de U+DFFFlo contrario, devuelve falso .
Excepciones:
- ArgumentNullException: si la s es nula.
- ArgumentOutOfRangeException: si el índice no es una posición dentro de s .
Los siguientes programas ilustran el uso del método Char.IsLowSurrogate(String, Int32) :
Ejemplo 1:
// C# program to demonstrate
// Char.IsLowSurrogate(String,
// Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling check() Method
check("1234", 3);
check("Tsunami", 3);
check("psyc0lo", 4);
// declaring and initializing string s1
string s1 = new String(new char[] {'a',
'\uD800', '\uDC00', 'z' });
check(s1, 2);
}
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);
}
}
// Defining check() method
public static void check(string s, int i)
{
// checking condition
// using IsLowSurrogate() Method
bool val = Char.IsLowSurrogate(s, i);
// checking
if (val)
Console.WriteLine("String '{0}' contains Low "
+ "Surrogate value at index {1} ", s, i);
else
Console.WriteLine("String '{0}' does't contain any Low"
+ "Surrogate value at index {1}", s, i);
}
}
Producción:
String '1234' does't contain any LowSurrogate value at index 3 String 'Tsunami' does't contain any LowSurrogate value at index 3 String 'psyc0lo' does't contain any LowSurrogate value at index 4 String 'að??z' contains Low Surrogate value at index 2
Ejemplo 2: para ArgumentNullException
// C# program to demonstrate
// Char.IsLowSurrogate(String,
// Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling check() Method
check("1234", 3);
check("Tsunami", 3);
check("psyc0lo", 4);
// declaring and initializing string s1
string s1 = new String(new char[] {'a',
'\uD800', '\uDC00', 'z' });
check(s1, 2);
Console.WriteLine("");
Console.WriteLine("s is null");
check(null, 4);
}
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);
}
}
// Defining check() method
public static void check(string s, int i)
{
// checking condition
// using IsLowSurrogate() Method
bool val = Char.IsLowSurrogate(s, i);
// checking
if (val)
Console.WriteLine("String '{0}' contains Low "
+ "Surrogate value at index {1} ",s, i);
else
Console.WriteLine("String '{0}' does't contain any Low"
+ "Surrogate value at index {1}",s, i);
}
}
Producción:
String '1234' does't contain any LowSurrogate value at index 3 String 'Tsunami' does't contain any LowSurrogate value at index 3 String 'psyc0lo' does't contain any LowSurrogate value at index 4 String 'að??z' contains Low Surrogate value at index 2 s is null Exception Thrown: System.ArgumentNullException
Ejemplo 3: para ArgumentOutOfRangeException
// C# program to demonstrate
// Char.IsLowSurrogate(String,
// Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling check() Method
check("1234", 3);
check("Tsunami", 3);
check("psyc0lo", 4);
// declaring and initializing string s1
string s1 = new String(new char[] {'a',
'\uD800', '\uDC00', 'z' });
check(s1, 2);
Console.WriteLine("");
Console.WriteLine("index is less than zero");
check("null", -4);
}
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);
}
}
// Defining check() method
public static void check(string s, int i)
{
// checking condition
// using IsLowSurrogate() Method
bool val = Char.IsLowSurrogate(s, i);
// checking
if (val)
Console.WriteLine("String '{0}' contains Low "
+ "Surrogate value at index {1} ",s, i);
else
Console.WriteLine("String '{0}' does't contain any Low"
+ "Surrogate value at index {1}",s, i);
}
}
Producción:
String '1234' does't contain any LowSurrogate value at index 3 String 'Tsunami' does't contain any LowSurrogate value at index 3 String 'psyc0lo' does't contain any LowSurrogate value at index 4 String 'að??z' contains Low Surrogate value at index 2 index is less than zero Exception Thrown: System.ArgumentOutOfRangeException
Referencia:
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA