Guid.TryParseExact Guid.TryParseExact Guid.TryParseExact Guid.TryParseExact Method

Definition

Overloads

TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid) TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid) TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid) TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid)

Converts span of characters representing the GUID to the equivalent Guid structure, provided that the string is in the specified format.

TryParseExact(String, String, Guid) TryParseExact(String, String, Guid) TryParseExact(String, String, Guid) TryParseExact(String, String, Guid)

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

TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid) TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid) TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid) TryParseExact(ReadOnlySpan<Char>, ReadOnlySpan<Char>, Guid)

Converts span of characters representing the GUID to the equivalent Guid structure, provided that the string is in the specified format.

public:
 static bool TryParseExact(ReadOnlySpan<char> input, ReadOnlySpan<char> format, [Runtime::InteropServices::Out] Guid % result);
public static bool TryParseExact (ReadOnlySpan<char> input, ReadOnlySpan<char> format, out Guid result);
static member TryParseExact : ReadOnlySpan<char> * ReadOnlySpan<char> * Guid -> bool
Public Shared Function TryParseExact (input As ReadOnlySpan(Of Char), format As ReadOnlySpan(Of Char), ByRef result As Guid) As Boolean

Parameters

input
ReadOnlySpan<Char>

A read-only span containing the characters representing the GUID to convert.

format
ReadOnlySpan<Char>

A read-only span containing a character representing one of the following specifiers that indicates the exact format to use when interpreting input: "N", "D", "B", "P", or "X".

result
Guid Guid Guid Guid

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

Returns

true if the parse operation was successful; otherwise, false.

TryParseExact(String, String, Guid) TryParseExact(String, String, Guid) TryParseExact(String, String, Guid) TryParseExact(String, String, Guid)

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

public:
 static bool TryParseExact(System::String ^ input, System::String ^ format, [Runtime::InteropServices::Out] Guid % result);
public static bool TryParseExact (string input, string format, out Guid result);
static member TryParseExact : string * string * Guid -> bool
Public Shared Function TryParseExact (input As String, format As String, ByRef result As Guid) As Boolean

Parameters

input
String String String String

The GUID to convert.

format
String String String String

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

result
Guid Guid Guid 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 Empty.

Returns

true if the parse operation was successful; otherwise, false.

Examples

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}}'
Module Example
   Public Sub Main()
      ' Define an array of all format specifiers.
      Dim formats() As String = { "N", "D", "B", "P", "X" }
      Dim guid As Guid = Guid.NewGuid()
      ' Create an array of valid Guid string representations.
      Dim stringGuids(formats.Length - 1) As String
      For ctr As Integer = 0 To formats.Length - 1
         stringGuids(ctr) = guid.ToString(formats(ctr))
      Next

      ' Try to parse the strings in the array using the "B" format specifier.
      For Each stringGuid In stringGuids
         Dim newGuid As Guid
         If Guid.TryParseExact(stringGuid, "B", newGuid) Then
            Console.WriteLine("Successfully parsed {0}", stringGuid)
         Else
            Console.WriteLine("Unable to parse '{0}'", stringGuid)
         End If   
      Next      
   End Sub
End Module
' 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}}'

Remarks

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}}
See also

Applies to