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Int16.TryParse Method (String, Int16%)

Silverlight

Converts the string representation of a number to its 16-bit signed integer equivalent. A return value indicates whether the conversion succeeded or failed.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

public static bool TryParse(
	string s,
	out short result
)

Parameters

s: Type: System.String
A string containing a number to convert.

result: Type: System.Int16%
When this method returns, contains the 16-bit signed integer value equivalent to the number contained in s, if the conversion succeeded, or zero if the conversion failed. The conversion fails if the s parameter is null, is not of the correct format, or represents a number less than MinValue or greater than MaxValue. This parameter is passed uninitialized.

Return Value

Type: System.Boolean
true if s was converted successfully; otherwise, false.

Remarks

The Int16.TryParse(String, Int16) method differs from the Int16.Parse(String) method by returning a Boolean value that indicates whether the parse operation succeeded instead of returning the parsed Int16 value. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.

The s parameter should be the string representation of a number in the form:

[ws][sign]digits[ws]

Items in square brackets ([ and ]) are optional. The following table describes each element.

Element	Description
ws	Optional white space.
sign	An optional sign.
digits	A sequence of digits ranging from 0 to 9.

The s parameter is interpreted using the NumberStyles.Integer style. In addition to the byte value's decimal digits, only leading and trailing spaces together with a leading sign are allowed. To explicitly define the style elements together with the culture-specific formatting information that can be present in s, use the Int16.TryParse(String, NumberStyles, IFormatProvider, Int16) method.

The s parameter is parsed using the formatting information in a NumberFormatInfo object that is initialized for the current system culture. For more information, see CurrentInfo.

This overload of the TryParse method interprets all digits in the s parameter as decimal digits. To parse the string representation of a hexadecimal number, call the Int16.TryParse(String, NumberStyles, IFormatProvider, Int16) overload.

Examples

The following example calls the Int16.TryParse(String, Int16)method with a number of different string values.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      TryToParse(outputBlock, null);
      TryToParse(outputBlock, "16051");
      TryToParse(outputBlock, "9432.0");
      TryToParse(outputBlock, "16,667");
      TryToParse(outputBlock, "   -322   ");
      TryToParse(outputBlock, "+4302");
      TryToParse(outputBlock, "(100);");
      TryToParse(outputBlock, "01FA");
   }

   private static void TryToParse(System.Windows.Controls.TextBlock outputBlock, string value)
   {
      short number;
      bool result = Int16.TryParse(value, out number);
      if (result)
      {
         outputBlock.Text += String.Format("Converted '{0}' to {1}.", value, number) + "\n";
      }
      else
      {
         if (value == null) value = "";
         outputBlock.Text += String.Format("Attempted conversion of '{0}' failed.", value) + "\n";
      }
   }
}
// The example displays the following output:
//       Attempted conversion of '' failed.
//       Converted '16051' to 16051.
//       Attempted conversion of '9432.0' failed.
//       Attempted conversion of '16,667' failed.
//       Converted '   -322   ' to -322.
//       Converted '+4302' to 4302.
//       Attempted conversion of '(100)' failed.
//       Attempted conversion of '01FA' failed.