Compartir a través de

  • Artículo

StreamReader Constructor (String)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

When it is called by trusted applications, initializes a new instance of the StreamReader class for the specified file name.

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

Syntax

'Declaration
Public Sub New ( _
    path As String _
)

public StreamReader(
    string path
)

Parameters

Exceptions

Exception Condition
ArgumentException

path is an empty string ("").
ArgumentNullException

path is nulla null reference (Nothing in Visual Basic).
FileNotFoundException

The file cannot be found.
DirectoryNotFoundException

The specified path is invalid; for example, it might refer to an unmapped drive.
IOException

path includes an incorrect or invalid syntax for file name, directory name, or volume label.

Remarks

The complete file path is specified by the path parameter. The default character encoding and default buffer size are used.

The path parameter can be a file name, including a file on a Universal Naming Convention (UNC) share.

The path parameter is not required to be a file stored on disk; it can be any part of a system that supports access using streams.

Caution noteCaution:

When you compile a set of characters with a particular cultural setting and retrieve those same characters with a different cultural setting, the characters might not be interpretable, and could cause an exception to be thrown.

Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

 This member has a SecurityCriticalAttribute attribute on Silverlight for Windows Phone, because the attribute was present in Silverlight 3. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.