Convert.ToDateTime(String, IFormatProvider) Method in C#

The Convert.ToDateTime(String, IFormatProvider) method in C# converts a string representation of a date and time to an equivalent DateTime object, using the specified culture-specific formatting information.

This method is particularly useful when working with date strings from different cultures or regions, as it allows you to specify how the date should be interpreted based on cultural formatting conventions.

Syntax

Following is the syntax −

public static DateTime ToDateTime(string value, IFormatProvider provider);

Parameters

• value − A string that contains a date and time to convert.

• provider − An object that implements IFormatProvider and supplies culture-specific formatting information. Typically a CultureInfo object.

Return Value

Returns a DateTime object that represents the date and time specified by the value parameter, interpreted according to the culture information provided by the provider parameter.

Using Convert.ToDateTime with US Culture

Example

using System;
using System.Globalization;

public class Demo {
   public static void Main() {
      CultureInfo cultures = new CultureInfo("en-US");
      String val = "11/11/2019";
      Console.WriteLine("Converted DateTime value...");
      DateTime res = Convert.ToDateTime(val, cultures);
      Console.Write("{0}", res);
   }
}

The output of the above code is −

Converted DateTime value...
11/11/2019 12:00:00 AM

Using Convert.ToDateTime with Different Cultures

Example

using System;
using System.Globalization;

public class CultureDemo {
   public static void Main() {
      string dateString = "15/03/2023";
      
      // Parse with UK culture (dd/MM/yyyy format)
      CultureInfo ukCulture = new CultureInfo("en-GB");
      DateTime ukDate = Convert.ToDateTime(dateString, ukCulture);
      Console.WriteLine("UK format: " + ukDate.ToString("dd/MM/yyyy"));
      
      // Parse with French culture
      CultureInfo frCulture = new CultureInfo("fr-FR");
      DateTime frDate = Convert.ToDateTime(dateString, frCulture);
      Console.WriteLine("French format: " + frDate.ToString("dd/MM/yyyy"));
      
      // Using invariant culture for ISO format
      string isoDate = "2023-03-15";
      DateTime isoDateTime = Convert.ToDateTime(isoDate, CultureInfo.InvariantCulture);
      Console.WriteLine("ISO format: " + isoDateTime.ToString("yyyy-MM-dd"));
   }
}

The output of the above code is −

UK format: 15/03/2023
French format: 15/03/2023
ISO format: 2023-03-15

Common Culture Formats

Conclusion

The Convert.ToDateTime(String, IFormatProvider) method enables culture-aware parsing of date strings, ensuring correct interpretation based on regional formatting conventions. This method is essential when working with internationalized applications or processing date data from different cultural contexts.