IsolatedStorageFile.OpenFile Method (String, FileMode, FileAccess)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Opens a file in the specified mode with the specified file access.
Assembly: mscorlib (in mscorlib.dll)
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.IsolatedStorageFileStreamA file that is opened in the specified mode and access, and is unshared.
| Exception | Condition |
|---|---|
| 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. |
This method is equivalent to using the IsolatedStorageFileStream.IsolatedStorageFileStream(String, FileMode, FileAccess, IsolatedStorageFile) constructor.
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); } }