Guid.TryParseExact Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Converts the string representation of a GUID to the equivalent Guid value, provided that the string is in the specified format.
Assembly: mscorlib (in mscorlib.dll)
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
%
When this method returns, contains the value that is equivalent to the GUID contained in input if the conversion succeeded, or Guid.Empty if the conversion failed.
This method returns false if input is null or not in a recognized format, and does not 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 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 Demo(System.Windows.Controls.TextBlock outputBlock) { // 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)) outputBlock.Text += String.Format("Successfully parsed {0}\n", stringGuid); else outputBlock.Text += String.Format("Unable to parse '{0}'\n", 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}}'