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C# | Convert.ToInt32(String, IFormatProvider) Method

  • Last Updated : 05 Dec, 2019

This method is used to converts the specified string representation of a number to an equivalent 32-bit signed integer, using the specified culture-specific formatting information.

Syntax:

public static int ToInt32 (string value, IFormatProvider provider);

Parameters:

  • value: It is a string that contains the number to convert.
  • provider: An object that supplies culture-specific formatting information.

Return Value: This method returns a 32-bit signed integer that is equivalent to the number in value, or 0 (zero) if value is null.

Exceptions:



  • FormatException: If the value does not consist of an optional sign followed by a sequence of digits (0 through 9).
  • OverflowException: If the value represents a number that is less than MinValue or greater than MaxValue.

Below programs illustrate the use of Convert.ToInt32(String, IFormatProvider) Method:

Example 1:




// C# program to demonstrate the
// Convert.ToInt32() Method
using System;
using System.Globalization;
  
class GFG {
  
// Main Method
public static void Main()
{
    try {
  
        // creating object of CultureInfo
        CultureInfo cultures = new CultureInfo("en-US");
  
        // declaring and initializing String array
        string[] values = {"12345", "+12345",
                                   "-12345"};
  
        // calling get() Method
        Console.Write("Converted int value "
                    + "of specified strings: ");
  
        for (int j = 0; j < values.Length; j++) 
        {
            get(values[j], cultures);
        }
    }
  
    catch (FormatException e) 
    {
  
        Console.WriteLine("\n");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
  
    catch (OverflowException e) 
    {
  
        Console.WriteLine("\n");
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
}
  
// Defining get() method
public static void get(string s,
           CultureInfo cultures)
{
  
    // converting string to specified int
    int val = Convert.ToInt32(s, cultures);
  
    // display the converted char value
    Console.Write(" {0}, ", val);
}
}
Output:
Converted int value of specified strings:  12345,  12345,  -12345,

Example 2: For FormatException




// C# program to demonstrate the
// Convert.ToInt32() Method
using System;
using System.Globalization;
  
class GFG {
  
// Main Method
public static void Main()
{
      
try {
  
    // creating object of CultureInfo
    CultureInfo cultures = new CultureInfo("en-US");
  
    // declaring and initializing String array
    string[] values = {"12345", "+12345",
                              "-12345" };
  
    // calling get() Method
    Console.WriteLine("Converted int value"
              + " of specified strings: ");
  
    for (int j = 0; j < values.Length; j++)
    {
  
        get(values[j], cultures);
    }
  
    Console.WriteLine("\n");
    string s = "123 456, 789";
  
    Console.WriteLine("format of s is invalid ");
  
    // converting string to specified char
    int val = Convert.ToInt32(s, cultures);
  
    // display the converted char value
    Console.Write(" {0}, ", val);
}
  
catch (FormatException e) {
  
    Console.Write("Exception Thrown: ");
    Console.Write("{0}", e.GetType(), e.Message);
}
catch (OverflowException e) {
  
    Console.Write("Exception Thrown: ");
    Console.Write("{0}", e.GetType(), e.Message);
}
}
  
// Defining get() method
public static void get(string s,
           CultureInfo cultures)
{
  
// converting string to
// specified int value
int val = Convert.ToInt32(s, cultures);
  
// display the converted int value
Console.Write(" {0}, ", val);
}
}
Output:
Converted int value of specified strings: 
 12345,  12345,  -12345, 

format of s is invalid 
Exception Thrown: System.FormatException

Example 3: For OverFlowException




// C# program to demonstrate the
// Convert.ToInt32() Method
using System;
using System.Globalization;
  
class GFG {
  
// Main Method
public static void Main()
{
      
    try {
  
        // creating object of CultureInfo
        CultureInfo cultures = new CultureInfo("en-US");
  
        // declaring and initializing String array
        string[] values = {"12345", "+12345",
                                  "-12345" };
  
        // calling get() Method
        Console.WriteLine("Converted int value "
                    + "of specified strings: ");
  
        for (int j = 0; j < values.Length; j++) 
        {
  
            get(values[j], cultures);
        }
  
        Console.WriteLine("\n");
        string s = "-7922816251426433759354395033500000";
  
        Console.WriteLine("s is less than the MinValue");
  
        // converting string to specified char
        int val = Convert.ToInt32(s, cultures);
  
        // display the converted char value
        Console.Write(" {0}, ", val);
    }
      
    catch (FormatException e) 
    {
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
      
    catch (OverflowException e) 
    {
        Console.Write("Exception Thrown: ");
        Console.Write("{0}", e.GetType(), e.Message);
    }
}
  
// Defining get() method
public static void get(string s,
           CultureInfo cultures)
{
  
    // converting string to
    // specified int value
    int val = Convert.ToInt32(s, cultures);
  
    // display the converted int value
    Console.Write(" {0}, ", val);
}
}
Output:
Converted int value of specified strings: 
 12345,  12345,  -12345, 

s is less than the MinValue
Exception Thrown: System.OverflowException

Reference:




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