Articolo
11/18/2011

FileAccess Enumeration

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

Defines constants for read, write, or read/write access to a file.

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

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

Syntax

'Declaration
<FlagsAttribute> _
<ComVisibleAttribute(True)> _
Public Enumeration FileAccess

[FlagsAttribute]
[ComVisibleAttribute(true)]
public enum FileAccess

Members

	Member name	Description
	Read	Read access to the file. Data can be read from the file. Combine with Write for read/write access.
	Write	Write access to the file. Data can be written to the file. Combine with Read for read/write access.
	ReadWrite	Read and write access to the file. Data can be written to and read from the file.

Remarks

Specify a FileAccess parameter in IsolatedStorageFileStream constructors.

Examples

The following example accesses a file for writing. This code example is part of a larger example provided for the IsolatedStorageFile class.

' Write to an existing file: MyApp1\SubDir1\MyApp1A.txt

' Determine if the file exists before writing to it.
Dim filePath As String = Path.Combine(subdirectory1, "MyApp1A.txt")

If store.FileExists(filePath) Then
    Try
        Using sw As StreamWriter = _
            New StreamWriter(store.OpenFile(filePath, FileMode.Open, FileAccess.Write))

            sw.WriteLine("To do list:")
            sw.WriteLine("1. Buy supplies.")
        End Using

    Catch ex As IsolatedStorageException
        sb.AppendLine(ex.Message)
    End Try
Else
    sb.AppendLine((filePath + "does not exist"))
End If

// Write to an existing file: MyApp1\SubDir1\MyApp1A.txt

// Determine if the file exists before writing to it.
string filePath = Path.Combine(subdirectory1, "MyApp1A.txt");

if (store.FileExists(filePath))
{
    try
    {
        using (StreamWriter sw =
            new StreamWriter(store.OpenFile(filePath,
                FileMode.Open, FileAccess.Write)))
        {
            sw.WriteLine("To do list:");
            sw.WriteLine("1. Buy supplies.");
        }
    }
    catch (IsolatedStorageException ex)
    {

        sb.AppendLine(ex.Message);
    }
}

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.

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