FileStream.CanRead Property
.NET Framework (current version)
Gets a value indicating whether the current stream supports reading.
Assembly: mscorlib (in mscorlib.dll)
Property Value
Type: System.Booleantrue if the stream supports reading; false if the stream is closed or was opened with write-only access.
If a class derived from Stream does not support reading, calls to the Read, ReadByte, and BeginRead methods throw a NotSupportedException.
If the stream is closed, this property returns false.
The following example demonstrates a use of the CanRead property. The output of this code is "MyFile.txt is not writable." To get the output message "MyFile.txt can be both written to and read from.", change the FileAccess parameter to ReadWrite in the FileStream constructor.
Imports System Imports System.IO Class TestRW Public Shared Sub Main() Dim fs As New FileStream("MyFile.txt", FileMode.OpenOrCreate, FileAccess.Read) If fs.CanRead And fs.CanWrite Then Console.WriteLine("MyFile.txt can be both written to and read from.") Else If fs.CanRead Then Console.WriteLine("MyFile.txt is not writable.") End If End If End Sub End Class
Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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