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IsolatedStorageFile.OpenFile Method (String, FileMode, FileAccess)

July 28, 2014

Opens a file in the specified mode with the specified file access.

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

public IsolatedStorageFileStream OpenFile(
	string path,
	FileMode mode,
	FileAccess access
)

Parameters

path
Type: System.String
The relative path of the file within the isolated store.
mode
Type: System.IO.FileMode
The mode in which to open the file.
access
Type: System.IO.FileAccess
The type of access to open the file with.

Return Value

Type: System.IO.IsolatedStorage.IsolatedStorageFileStream
A file that is opened in the specified mode and access, and is unshared.

ExceptionCondition
IsolatedStorageException

The isolated store has been removed.

-or-

Isolated storage is disabled.

ArgumentException

path is malformed.

ArgumentNullException

path is null.

DirectoryNotFoundException

The directory in path does not exist.

FileNotFoundException

No file was found and the mode is set to Open .

ObjectDisposedException

The isolated store has been disposed.

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


// 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);
    }
}


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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