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Guid.TryParseExact Method

Converts the string representation of a GUID to the equivalent Guid structure, provided that the string is in the specified format.

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

public static bool TryParseExact(
	string input,
	string format,
	out Guid result
)

Parameters

input
Type: System.String

The GUID to convert.

format
Type: System.String

One of the following specifiers that indicates the exact format to use when interpreting input: "N", "D", "B", "P", or "X".

result
Type: System.Guid

The structure that will contain the parsed value. If the method returns true, result contains a valid Guid. If the method returns false, result equals Guid.Empty.

Return Value

Type: System.Boolean
true if the parse operation was successful; otherwise, false.

This method requires the string to convert to be exactly in the format specified by the format parameter, after leading and trailing white-space characters are removed. It returns false if input is null or is not in the format specified by format, and doesn't throw an exception.

The following table shows the accepted format specifiers for the format parameter. "0" represents a digit; hyphens ("-"), braces ("{", "}"), and parentheses ("(", ")") appear as shown.

Specifier

Format of the input parameter

N

32 digits:

00000000000000000000000000000000

D

32 digits separated by hyphens:

00000000-0000-0000-0000-000000000000

B

32 digits separated by hyphens, enclosed in braces:

{00000000-0000-0000-0000-000000000000}

P

32 digits separated by hyphens, enclosed in parentheses:

(00000000-0000-0000-0000-000000000000)

X

Four hexadecimal values enclosed in braces, where the fourth value is a subset of eight hexadecimal values that is also enclosed in braces:

{0x00000000,0x0000,0x0000,{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}}

The following example calls the ToString(String) method with each of the supported format specifiers to generate an array of strings that represent a single GUID. These are then passed to the TryParseExact method, which successfully parses the string that conforms to the "B" format specifier.

using System;

public class Example
{
   public static void Main()
   {
      // Define an array of all format specifiers. 
      string[] formats = { "N", "D", "B", "P", "X" };
      Guid guid = Guid.NewGuid();
      // Create an array of valid Guid string representations. 
      string[] stringGuids = new string[formats.Length];
      for (int ctr = 0; ctr < formats.Length; ctr++)
         stringGuids[ctr] = guid.ToString(formats[ctr]);

      // Parse the strings in the array using the "B" format specifier.
      foreach (var stringGuid in stringGuids) {
         Guid newGuid;
         if (Guid.TryParseExact(stringGuid, "B", out newGuid))
            Console.WriteLine("Successfully parsed {0}", stringGuid);
         else 
            Console.WriteLine("Unable to parse '{0}'", stringGuid);
      }     
   }
}
// The example displays the following output: 
//    Unable to parse 'c0fb150f6bf344df984a3a0611ae5e4a' 
//    Unable to parse 'c0fb150f-6bf3-44df-984a-3a0611ae5e4a' 
//    Successfully parsed {c0fb150f-6bf3-44df-984a-3a0611ae5e4a} 
//    Unable to parse '(c0fb150f-6bf3-44df-984a-3a0611ae5e4a)' 
//    Unable to parse '{0xc0fb150f,0x6bf3,0x44df,{0x98,0x4a,0x3a,0x06,0x11,0xae,0x5e,0x4a}}'

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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