IsolatedStorageFile.FileExists Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Determines whether the specified path refers to an existing file in the isolated store.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- path
- Type: System.String
The path and file name to test.
Return Value
Type: System.Booleantrue if path refers to an existing file in the isolated store and is not null; otherwise, false.
| Exception | Condition |
|---|---|
| IsolatedStorageException | The isolated store has been removed. -or- Isolated storage is disabled. |
| ObjectDisposedException | The isolated store has been disposed. |
The following example determines whether a file exists before writing to it. 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); } }
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