OpenText Method

File.OpenText Method (String)

 

Opens an existing UTF-8 encoded text file for reading.

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

static member OpenText : 
        path:string -> StreamReader

Parameters

path
Type: System.String

The file to be opened for reading.

Return Value

Type: System.IO.StreamReader

A StreamReader on the specified path.

Exception Condition
UnauthorizedAccessException

The caller does not have the required permission.

ArgumentException

path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by InvalidPathChars.

ArgumentNullException

path is null.

PathTooLongException

The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.

DirectoryNotFoundException

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

FileNotFoundException

The file specified in path was not found.

NotSupportedException

path is in an invalid format.

This method is equivalent to the StreamReader(String) constructor overload.

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory. To obtain the current working directory, see GetCurrentDirectory.

For a list of common I/O tasks, see Common I/O Tasks.

The following example opens a text file for reading.

No code example is currently available or this language may not be supported.

FileIOPermission

for reading from the specified file. Associated enumeration: FileIOPermissionAccess.Read

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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