C# Single TryParse(String, NumberStyles, IFormatProvider, Single)

Description

Single TryParse(String, NumberStyles, IFormatProvider, Single)converts the string representation of a number in a specified style and culture-specific format to its single-precision floating-point number equivalent. A return value indicates whether the conversion succeeded or failed.

Syntax

Single.TryParse(String, NumberStyles, IFormatProvider, Single) has the following syntax.


public static bool TryParse(
  string s,/*from  ww  w  .jav  a  2  s. c om*/
  NumberStyles style,
  IFormatProvider provider,
  out float result
)

Parameters

Single.TryParse(String, NumberStyles, IFormatProvider, Single) has the following parameters.

s - A string representing a number to convert.
style - A bitwise combination of enumeration values that indicates the permitted format of s. A typical value to specify is NumberStyles.Float combined with NumberStyles.AllowThousands.
provider - An object that supplies culture-specific formatting information about s.
result - When this method returns, contains the single-precision floating-point number equivalent to the numeric value or symbol contained in s, if the conversion succeeded, or zero if the conversion failed. The conversion fails if the s parameter is null or String.Empty, is not in a format compliant with style, represents a number less than Single.MinValue or greater than Single.MaxValue, or if style is not a valid combination of NumberStyles enumerated constants. This parameter is passed uninitialized.

Returns

Single.TryParse(String, NumberStyles, IFormatProvider, Single) method returns true if s was converted successfully; otherwise, false.

Example

The following example demonstrates the use of the Single.TryParse(String, NumberStyles, IFormatProvider, Single) method to parse the string representation of numbers that have a particular style and are formatted using the conventions of a particular culture.


/*from   ww  w .ja v a2 s  .c o  m*/
using System;
public class MainClass{
  public static void Main(String[] argv){  
    string value;
    System.Globalization.NumberStyles style;
    System.Globalization.CultureInfo culture;
    float number;
    
    // Parse currency value using en-GB culture. 
    value = "12,345.67";
    style = System.Globalization.NumberStyles.Number | 
            System.Globalization.NumberStyles.AllowCurrencySymbol;
    culture = System.Globalization.CultureInfo.CreateSpecificCulture("en-GB");
    if (Single.TryParse(value, style, culture, out number))
       Console.WriteLine("Converted '{0}' to {1}.", value, number);
    else
       Console.WriteLine("Unable to convert '{0}'.", value);
    
    value = "1234,567";
    style = System.Globalization.NumberStyles.AllowDecimalPoint;
    culture = System.Globalization.CultureInfo.CreateSpecificCulture("fr-FR");
    if (Single.TryParse(value, style, culture, out number))
       Console.WriteLine("Converted '{0}' to {1}.", value, number);
    else
       Console.WriteLine("Unable to convert '{0}'.", value);
    
    value = "1.234,567";
    style = System.Globalization.NumberStyles.AllowDecimalPoint | 
            System.Globalization.NumberStyles.AllowThousands;
    culture = System.Globalization.CultureInfo.CreateSpecificCulture("es-ES");
    if (Single.TryParse(value, style, culture, out number))
       Console.WriteLine("Converted '{0}' to {1}.", value, number);
    else
       Console.WriteLine("Unable to convert '{0}'.", value);
    
    value = "1 234,567";
    if (Single.TryParse(value, style, culture, out number))
       Console.WriteLine("Converted '{0}' to {1}.", value, number);
    else
       Console.WriteLine("Unable to convert '{0}'.", value);

  }
}

The code above generates the following result.