This method is used to converts the value of a UTF-16 encoded character or surrogate pair at a specified position in a string into a Unicode code point.
Syntax:
csharp
csharp
csharp
public static int ConvertToUtf32 (string s, int index);Parameters:
s: A string that contains a character or surrogate pair. index: The index position of the character or surrogate pair in s.Return Value: This method returns the 21-bit Unicode code point represented by the character or surrogate pair at the position in the s parameter specified by the index parameter. Exceptions:
- ArgumentNullException: If s is null.
- ArgumentOutOfRangeException: if index is not a position within s.
- Argument Exception: If the index is not a position within s.
- ArgumentException: If the specified index position contains a surrogate pair, and either the first character in the pair is not a valid high surrogate or the second character in the pair is not a valid low surrogate.
// C# program to demonstrate
// Char.ConvertToUtf32(String, Int32)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// declaring and initializing int
// variable with 21 bit unicode
int utf = 0xF42;
// getting the value
// using ConvertFromUtf32()
string value = Char.ConvertFromUtf32(utf);
// getting unicode point
// using ConvertToUtf32() method
int val = Char.ConvertToUtf32(value, 0);
// Display the value
Console.WriteLine("value is 0x{0:X}", val);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
Output:
Example 2: For ArgumentOutOfRangeException
value is 0xF42
// C# program to demonstrate
// Char.ConvertToUtf32(String, Int32)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// declaring and initializing int
// variable with 21 bit unicode
int utf = 0x42F;
// getting the value
// using ConvertFromUtf32()
string value = Char.ConvertFromUtf32(utf);
// getting unicode point
// using ConvertToUtf32() method
Console.WriteLine("index is not a position within s.");
int val = Char.ConvertToUtf32(value, 0xDFFF);
// Display the value
Console.WriteLine("value is 0x{0:X}", val);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
Output:
Example 3: For ArgumentNullException
index is not a position within s. Exception Thrown: System.ArgumentOutOfRangeException
// C# program to demonstrate
// Char.ConvertToUtf32(String, Int32)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// declaring and initializing
// int variablewith 21 bit
// unicode int utf = 0x42F;
// getting the value
// using ConvertFromUtf32()
string value = null;
// getting unicode point
// using ConvertToUtf32() method
Console.WriteLine("string value is null");
int val = Char.ConvertToUtf32(value, 0);
// Display the value
Console.WriteLine("value is 0x{0:X}", val);
}
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:
Reference:
string value is null Exception Thrown: System.ArgumentNullException