Path::GetInvalidPathChars Method

Gets an array containing the characters that are not allowed in path names.

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

public:
static array<wchar_t>^ GetInvalidPathChars()

Return Value

Type: array<System::Char>
An array containing the characters that are not allowed in path names.

The array returned from this method is not guaranteed to contain the complete set of characters that are invalid in file and directory names. The full set of invalid characters can vary by file system. For example, on Windows-based desktop platforms, invalid path characters might include ASCII/Unicode characters 1 through 31, as well as quote ("), less than (<), greater than (>), pipe (|), backspace (\b), null (\0) and tab (\t).

The following code example demonstrates the GetInvalidFileNameChars method and the GetInvalidPathChars method to retrieve invalid characters.

using namespace System;
using namespace System::IO;

namespace PathExample
{
    public ref class GetCharExample
    {
    public:
        static void Main()
        {
            // Get a list of invalid path characters. 
            array<Char>^ invalidPathChars = Path::GetInvalidPathChars();

            Console::WriteLine("The following characters are invalid in a path:");
            ShowChars(invalidPathChars);
            Console::WriteLine();

            // Get a list of invalid file characters. 
            array<Char>^ invalidFileChars = Path::GetInvalidFileNameChars();

            Console::WriteLine("The following characters are invalid in a filename:");
            ShowChars(invalidFileChars);
        }

        static void ShowChars(array<Char>^ charArray)
        {
            Console::WriteLine("Char\tHex Value");
            // Display each invalid character to the console. 
            for each (Char someChar in charArray)
            {
                if (Char::IsWhiteSpace(someChar))
                {
                    Console::WriteLine(",\t{0:X4}", (Int16)someChar);
                }
                else
                {
                    Console::WriteLine("{0:c},\t{1:X4}", someChar, (Int16)someChar);
                }
            }
        }
    };
};

int main()
{
    PathExample::GetCharExample::Main();
}
// Note: Some characters may not be displayable on the console. 
// The output will look something like: 
// 
// The following characters are invalid in a path: 
// Char    Hex Value 
// ",      0022 
// <,      003C 
// >,      003E 
// |,      007C 
// ... 
// 
// The following characters are invalid in a filename: 
// Char    Hex Value 
// ",      0022 
// <,      003C 
// >,      003E 
// |,      007C 
// ...

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

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

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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