Version.TryParse Method

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Overloads

TryParse(String, Version)	Tries to convert the string representation of a version number to an equivalent Version object, and returns a value that indicates whether the conversion succeeded.
TryParse(ReadOnlySpan<Char>, Version)	Tries to convert the specified read-only span of characters representing a version number to an equivalent Version object, and returns a value that indicates whether the conversion succeeded.

TryParse(String, Version)

Source:

Version.cs

Tries to convert the string representation of a version number to an equivalent Version object, and returns a value that indicates whether the conversion succeeded.

public:
 static bool TryParse(System::String ^ input, [Runtime::InteropServices::Out] Version ^ % result);

public static bool TryParse (string? input, out Version? result);

static member TryParse : string * Version -> bool

Public Shared Function TryParse (input As String, ByRef result As Version) As Boolean

Parameters

input

String

A string that contains a version number to convert.

result

Version

When this method returns, contains the Version equivalent of the number that is contained in input, if the conversion succeeded. If input is null, Empty, or if the conversion fails, result is null when the method returns.

Returns

Boolean

true if the input parameter was converted successfully; otherwise, false.

Examples

The following example uses the TryParse method to parse a number of strings that contain version information.

using System;

public class Example
{
   public static void Main()
   {
      string input = "4.0";
      ParseVersion(input);
      
      input = "4.0.";
      ParseVersion(input);
      
      input = "1.1.2";
      ParseVersion(input);
      
      input = "1.1.2.01702";
      ParseVersion(input);
      
      input = "1.1.2.0702.119";
      ParseVersion(input);
      
      input =  "1.3.5.2150000000";
      ParseVersion(input);
   }
   
   private static void ParseVersion(string input)
   {
      Version ver = null;
      if (Version.TryParse(input, out ver))
         Console.WriteLine("Converted '{0} to {1}.", input, ver);
      else
         Console.WriteLine("Unable to determine the version from '{0}'.",
                           input);
   }
}
// The example displays the following output:
//       Converted '4.0 to 4.0.
//       Unable to determine the version from '4.0.'.
//       Converted '1.1.2 to 1.1.2.
//       Converted '1.1.2.01702 to 1.1.2.1702.
//       Unable to determine the version from '1.1.2.0702.119'.
//       Unable to determine the version from '1.3.5.2150000000'.

open System

let parseVersion (input: string) =
    match Version.TryParse input with
    | true, ver ->
        printfn $"Converted '{input} to {ver}."
    | _ ->
        printfn $"Unable to determine the version from '{input}'."

[<EntryPoint>]
let main _ =
    let input = "4.0"
    parseVersion input

    let input = "4.0."
    parseVersion input

    let input = "1.1.2"
    parseVersion input

    let input = "1.1.2.01702"
    parseVersion input

    let input = "1.1.2.0702.119"
    parseVersion input

    let input =  "1.3.5.2150000000"
    parseVersion input
    0
// The example displays the following output:
//       Converted '4.0 to 4.0.
//       Unable to determine the version from '4.0.'.
//       Converted '1.1.2 to 1.1.2.
//       Converted '1.1.2.01702 to 1.1.2.1702.
//       Unable to determine the version from '1.1.2.0702.119'.
//       Unable to determine the version from '1.3.5.2150000000'.

Module Example
   Public Sub Main()
      Dim input As String = "4.0"
      ParseVersion(input)
      
      input = "4.0."
      ParseVersion(input)
      
      input = "1.1.2"
      ParseVersion(input)
      
      input = "1.1.2.01702"
      ParseVersion(input)
      
      input = "1.1.2.0702.119"
      ParseVersion(input)
      
      input =  "1.3.5.2150000000"
      ParseVersion(input)
   End Sub
   
   Private Sub ParseVersion(input As String)
      Dim ver As Version = Nothing
      If Version.TryParse(input, ver) Then
         Console.WriteLine("Converted '{0} to {1}.", input, ver)
      Else
         Console.WriteLine("Unable to determine the version from '{0}'.",
                           input)
      End If
   End Sub
End Module
' The example displays the following output:
'       Converted '4.0 to 4.0.
'       Unable to determine the version from '4.0.'.
'       Converted '1.1.2 to 1.1.2.
'       Converted '1.1.2.01702 to 1.1.2.1702.
'       Unable to determine the version from '1.1.2.0702.119'.
'       Unable to determine the version from '1.3.5.2150000000'.

Remarks

The TryParse method is similar to the Parse method, except that it doesn't throw an exception if the conversion fails. Instead, it returns false if input is null, has fewer than two or more than four components, has at least one component that is not an integer, has at least one component that is less than zero, or has at least one component that is greater than Int32.MaxValue.

For the parse operation to succeed, the input parameter must be in the following format:

major.minor[.build[.revision]]

where major, minor, build, and revision are the string representations of the version number's four components: major version number, minor version number, build number, and revision number, respectively. Optional components are shown in square brackets ([ and ]). The components must appear in order and must be separated by periods.

See also

• Parse(String)
• ToString

TryParse(ReadOnlySpan<Char>, Version)

Source:

Version.cs

Tries to convert the specified read-only span of characters representing a version number to an equivalent Version object, and returns a value that indicates whether the conversion succeeded.

public:
 static bool TryParse(ReadOnlySpan<char> input, [Runtime::InteropServices::Out] Version ^ % result);

public static bool TryParse (ReadOnlySpan<char> input, out Version? result);

static member TryParse : ReadOnlySpan<char> * Version -> bool

Public Shared Function TryParse (input As ReadOnlySpan(Of Char), ByRef result As Version) As Boolean

Parameters

input

ReadOnlySpan<Char>

A read-only span of characters that contains a version number to convert.

result

Version

When this method returns, contains the Version equivalent of the number that is contained in input, if the conversion succeeded. If input is null, Empty, or if the conversion fails, result is null when the method returns.

Returns

Boolean

true if the input parameter was converted successfully; otherwise, false.

Remarks

The TryParse method is similar to the Parse method, except that it doesn't throw an exception if the conversion fails. Instead, it returns false if input is null, has fewer than two or more than four components, has at least one component that is not an integer, has at least one component that is less than zero, or has at least one component that is greater than Int32.MaxValue.

For the parse operation to succeed, the input parameter must be in the following format:

major.minor[.build[.revision]]

where major, minor, build, and revision are the string representations of the version number's four components: major version number, minor version number, build number, and revision number, respectively. Optional components are shown in square brackets ([ and ]). The components must appear in order and must be separated by periods.