FileExists Method

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.

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

Public Function FileExists ( _
	path As String _
) As Boolean


Type: System.String
The path and file name to test.

Return Value

Type: System.Boolean
true if path refers to an existing file in the isolated store and is not Nothing; otherwise, false.


The isolated store has been removed.


Isolated storage is disabled.


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.
Dim filePath As String = Path.Combine(subdirectory1, "MyApp1A.txt")

If store.FileExists(filePath) Then
        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
    End Try
    sb.AppendLine((filePath + "does not exist"))
End If

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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