C# | Convert.ToDecimal(String, IFormatProvider) Method
Last Updated :
11 Jul, 2025
This method is used to convert the specified string representation of a number to an equivalent decimal number, using the specified culture-specific formatting information.
Syntax:
public static decimal ToDecimal (string value, IFormatProvider provider);
Parameters:
- value: It is a string that contains a number to convert.
- provider: It is an object that supplies culture-specific formatting information.
Return Value: This method returns a decimal number that is equivalent to the number in value, or 0 (zero) if value is null.
Exceptions:
- FormatException: If the value is not a number in a valid format.
- OverflowException: If the value represents a number that is less than MinValue or greater than MaxValue.
Below programs illustrate the use of Convert.ToDecimal(String, IFormatProvider) Method:
Example 1:
csharp
// C# program to demonstrate the
// Convert.ToDecimal() 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 = {"123456789", "12345.6789",
"123,456,789.0123"};
// calling get() Method
Console.WriteLine("Converted decimal 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 char
decimal val = Convert.ToDecimal(s, cultures);
// display the converted char value
Console.Write(" {0}, ", val);
}
}
Output: Converted decimal value of specified strings:
123456789, 12345.6789, 123456789.0123,
Example 2: For FormatException
csharp
// C# program to demonstrate the
// Convert.ToDecimal() 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 = {"123456789", "12345.6789",
"123,456,789.0123"};
// calling get() Method
Console.WriteLine("Converted decimal 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
decimal val = Convert.ToDecimal(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 decimal value
decimal val = Convert.ToDecimal(s, cultures);
// display the converted decimal value
Console.Write(" {0}, ", val);
}
}
Output: Converted decimal value of specified strings:
123456789, 12345.6789, 123456789.0123,
format of s is invalid
Exception Thrown: System.FormatException
Example 3: For OverflowException
csharp
// C# program to demonstrate the
// Convert.ToDecimal() 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 = {"123456789", "12345.6789",
"123,456,789.0123"};
// calling get() Method
Console.WriteLine("Converted decimal 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
decimal val = Convert.ToDecimal(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 decimal value
decimal val = Convert.ToDecimal(s, cultures);
// display the converted decimal value
Console.Write(" {0}, ", val);
}
}
Output: Converted decimal value of specified strings:
123456789, 12345.6789, 123456789.0123,
s is less than the MinValue
Exception Thrown: System.OverflowException
Reference:
