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DirectoryInfo.GetFileSystemInfos Method (String, SearchOption)

Retrieves an array of FileSystemInfo objects that represent the files and subdirectories matching the specified search criteria.

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

member GetFileSystemInfos : 
        searchPattern:string * 
        searchOption:SearchOption -> FileSystemInfo[] 

Parameters

searchPattern
Type: System.String

The search string to match against the names of directories and filesa. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters (see Remarks), but doesn't support regular expressions. The default pattern is "*", which returns all files.

searchOption
Type: System.IO.SearchOption

One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is TopDirectoryOnly.

Return Value

Type: System.IO.FileSystemInfo[]
An array of file system entries that match the search criteria.

ExceptionCondition
ArgumentException

searchPattern contains one or more invalid characters defined by the GetInvalidPathChars method.

ArgumentNullException

searchPattern is a null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

searchOption is not a valid SearchOption value.

DirectoryNotFoundException

The specified path is invalid (for example, it is on an unmapped drive).

SecurityException

The caller does not have the required permission.

searchPattern can be a combination of literal and wildcard characters, but doesn't support regular expressions. The following wildcard specifiers are permitted in searchPattern.

Wildcard specifier

Matches

* (asterisk)

Zero or more characters in that position.

? (question mark)

Zero or one character in that position.

Characters other than the wildcard are literal characters. For example, the string "*t" searches for all names in ending with the letter "t". ". The searchPattern string "s*" searches for all names in path beginning with the letter "s".

For subdirectories, the FileSystemInfo objects returned by this method can be cast to the derived class DirectoryInfo. Use the FileAttributes value returned by the FileSystemInfo.Attributes property to determine whether the FileSystemInfo represents a file or a directory.

This method pre-populates the values of the following FileSystemInfo properties:

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

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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