C# UInt64 Parse(String, NumberStyles)

Description

UInt64 Parse(String, NumberStyles) converts the string representation of a number in a specified style to its 64-bit unsigned integer equivalent.

Syntax

UInt64.Parse(String, NumberStyles) has the following syntax.


[CLSCompliantAttribute(false)]/*from   w  w  w  .j  ava2s . c  om*/
public static ulong Parse(
  string s,
  NumberStyles style
)

Parameters

UInt64.Parse(String, NumberStyles) has the following parameters.

s - A string that represents the number to convert. The string is interpreted by using the style specified by the style parameter.
style - A bitwise combination of the enumeration values that specifies the permitted format of s. A typical value to specify is NumberStyles.Integer.

Returns

UInt64.Parse(String, NumberStyles) method returns A 64-bit unsigned integer equivalent to the number specified in s.

Example

The following example tries to parse each element in a string array by using a number of NumberStyles values.


using System;//  w w  w . ja v a 2s . c o m
using System.Globalization;

public class Example
{
   public static void Main()
   {
      string[] values= { " 123459 ", "1,234,234", "(0)", "12341+", " + 22349 ", 
                         " +22349 ", "123423.00", "1e03ff", "23423.0e-2" };
      NumberStyles whitespace =  NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite;
      NumberStyles[] styles= { NumberStyles.None, whitespace, 
                               NumberStyles.AllowLeadingSign | NumberStyles.AllowTrailingSign | whitespace, 
                               NumberStyles.AllowThousands | NumberStyles.AllowCurrencySymbol, 
                               NumberStyles.AllowExponent | NumberStyles.AllowDecimalPoint };

      // Attempt to convert each number using each style combination. 
      foreach (string value in values)
      {
         Console.WriteLine("Attempting to convert '{0}':", value);
         foreach (NumberStyles style in styles)
         {
            try {
               ulong number = UInt64.Parse(value, style);
               Console.WriteLine("   {0}: {1}", style, number);
            }   
            catch (FormatException) {
               Console.WriteLine("   {0}: Bad Format", style);
            }   
            catch (OverflowException)
            {
               Console.WriteLine("   {0}: Overflow", value);         
            }         
         }
         Console.WriteLine();
      }
   }
}

The code above generates the following result.