C # Learning Note-stream,win8.1 Development little Note

The stream is used for IO processing

The following classes are available in the System.IO namespace

Binaryreader/writer

Textreader/writer

Stream

Where class stream is an abstract class. Thus there are three derived classes:

MemoryStream: Read and Write memory

BufferedStream: Read/write buffers

FileStream: Performing read and write to files

Textreader/writer is an abstract class. Derived classes from this:

Streamreader/streamwirter

Stringreader/streamwriter

Need to introduce a namespace:

Using System.IO

examples of memory flow and buffering use: MemoryStream memstream=NewMemoryStream (); BufferedStream Bufstream=NewBufferedStream (memstream);byte[] b=New byte[Ten];  for(intI=0;i<Ten; i++) {Bufstream.writebyte (byte) (i); } bufstream.position=0; Bufstream.read (b,0,9);  for(intI=0;i<Ten; i++) {Console.WriteLine ("the Read value is: {0}", B[i]); } Console.WriteLine ("value is: {0}", Bufstream.readbyte ()); Console.ReadLine ();

use of file streamsstrings=Console.ReadLine (); FileStream FileStream=NewFileStream (s,filemode.openorcreate); BinaryWriter Binstream=NewBinaryWriter (fileStream); for(intI=1; i<=Ten; i++) {Binstream.write (int) (i); } binstream.close (); Filestream.close (); FileStream F=NewFileStream (S,filemode.open,fileaccess.read,fileshare.readwrite); BinaryReader buf=NewBinaryReader (f); for(intI=1;i<Ten; i++) {Console.WriteLine ("Output {0}", buf. ReadByte ());//in vs2012, you can't read something like this .Console.WriteLine ("Output {0}", Bur.readint32 ()); only, because int is a 32-bit}

use of text streamsstringfilename,s; FileName=Console.ReadLine (); STREAMWRITER fn=NewStreamWriter (FileName,true);  for(intI=1;i<Ten; i++) {s=console.readline (); FN. WriteLine (s); } fn. Close (); StreamReader FR=NewStreamReader (fileName); for(intI=1;i<Ten; i++) {s=Fr. ReadLine (); Console.WriteLine (s); } fr. Close (); Console.ReadLine ();

C # Development win8.1 program can use Stackpane to realize the alternation of multiple controls in the same position

 Private voidDelete_click (Objectsender, RoutedEventArgs e)            {Database.delete (Mycorrectwindows.affair); Enter. Visibility=visibility.collapsed; Cancel. Visibility=visibility.collapsed; Correct. Visibility=visibility.collapsed; Delete. Visibility=visibility.collapsed; Words. Visibility=visibility.visible; Dragon_image. Visibility=visibility.collapsed; Correct_window.            Children.clear (); Affair_list.            Items.clear (); varItems =database.query (Mydate.year, Mydate.month, Mydate.day); foreach(varIteminchitems) {MyItem myitem=Newmyitem (item); myitem.doubletapped+=Click_listener; Affair_list.            Items.Add (myitem); }        }

Mainly by setting the visibility property, and by querying the database to the control to add

Using LINQ to sort data in a database

 Private voidSort_by_import_click (Objectsender, RoutedEventArgs e) {Sqlite.tablequery<Affair>items; if(Bundle.mode_num = =0) Items=database.query (bundle.date.Year); ElseItems=database.query (Bundle.date.Year, bundle.date.Month); Items= fromXinchItems byx.importanceSelectx; Affair_list.            Items.clear (); foreach(varIteminchitems) {                vartemp =Newmyitem (item); Temp. doubletapped+=Click_to_correct; Affair_list.            Items.Add (temp); }        }

C # Learning Note-stream,win8.1 Development little Note