Stream.CanRead Property
Assembly: mscorlib (in mscorlib.dll)
For an example of creating a file and writing text to a file, see Writing Text to a File. For an example of reading text from a file, see Reading Text from a File. For an example of reading from and writing to a binary file, see Reading and Writing to a Newly Created Data File.
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 is an example of using the CanRead property.
using namespace System; using namespace System::IO; int main( void ) { FileStream^ fs = gcnew FileStream( "MyFile.txt",FileMode::OpenOrCreate,FileAccess::Read ); if ( fs->CanRead && fs->CanWrite ) { Console::WriteLine( "MyFile.txt can be both written to and read from." ); } else { Console::WriteLine( "MyFile.txt is not writable" ); } return 0; }
import System.*;
import System.IO.*;
class TestRW
{
public static void main(String[] args)
{
FileStream fs = new FileStream("MyFile.txt",
FileMode.OpenOrCreate, FileAccess.Read);
if (fs.get_CanRead() && fs.get_CanWrite()) {
Console.WriteLine("MyFile.txt can be both written to "
+ "and read from.");
}
else {
if (fs.get_CanRead()) {
Console.WriteLine("MyFile.txt is not writable.");
}
}
} //main
} //TestRW
import System; import System.IO; class TestRW { public static function Main() : void { var fs : FileStream = new FileStream("MyFile.txt", FileMode.OpenOrCreate, FileAccess.Read); if (fs.CanRead && fs.CanWrite) { Console.WriteLine("MyFile.txt can be both written to and read from."); } else if (fs.CanRead) { Console.WriteLine("MyFile.txt is not writable."); } } } TestRW.Main();
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.