The use and difference of FileStream, StreamReader and StreamWriter

• FileStream can manipulate any file.
• FileStream can manipulate large files.
• StreamReader and StreamWriter are only for text files, and text files are simpler to manipulate.

1         Private voidButton1_Click (Objectsender, EventArgs e)2         {3             //FileStream can read and write any file, SteamReader, Steamwriter is only suitable for reading and writing text files4 5             using(FileStream fs =NewFileStream ("Test.txt", FileMode.OpenOrCreate, FileAccess.Read))6             {7                 byte[] buffer =New byte[1024x768*1024x768];//FileStream is required to read and write in byte array form. 8                 stringCT ="";9                  while(true)//large files need to be read several times, so they need to be read in a loopTen                 { One                     intA = fs. Read (Buffer,0, buffer. Length); A                      -CT + =Encoding.Unicode.GetString (buffer); -                     if(A = =0) the                     { -                          Break; -                     } -                 } +TextBox1.Text =CT; -             } +  A  at         } -  -         Private voidButton2_Click (Objectsender, EventArgs e) -         { -              -             //Copy the file test.pdf to Test1.pdf in             using(FileStream fsread =NewFileStream ("test.pdf", FileMode.OpenOrCreate, FileAccess.Read)) -             { to                 using(FileStream Fswriter =NewFileStream ("test1.pdf", FileMode.Create, FileAccess.Write)) +                 { -                     byte[] bytes =New byte[1024x768*1024x768]; the                      while(true) *                     { $                         intA = Fsread. Read (Bytes,0, Bytes. Length);Panax NotoginsengFswriter. Write (Bytes,0, a); -                         if(a==0) the                         { +                          Break ; A                         } the                     } +                 } -             } $MessageBox.Show ("Replication succeeded"); $         } -  -         Private voidButton_sr_click (Objectsender, EventArgs e) the         { -             stringReaders ="";Wuyi             using(StreamReader sr =NewStreamReader ("Test.txt", Encoding.default)) the             { -                 Char[] buffer=New Char[ the* the];//prepare a char array as a container Wu                  while(true)//when the text is too many, not read at once, read all the time -                 { About                     intA = Sr. Read (Buffer,0, buffer. Length); $                     if(a==0) -{ Break ;} -Readers + =New string(buffer);//re-converting a char array to text -                 } A                  +             } theTextBox1.Text =readers; -         } $  the         Private voidButton_sw_click (Objectsender, EventArgs e) the         { the             using(StreamReader sr=NewStreamReader ("Test.txt", Encoding. Default)) the             { -             using(StreamWriter sw=NewStreamWriter ("Test2.txt",false, Encoding. Default)) in             { the                  the                  while(Sr.) Peek () >=0)//use some method to determine whether the end of the file is read, but it seems to lose empty text.  About                 { the                    stringA=Sr. ReadLine (); the  the SW. WriteLine (a); +                 } -                  the             }Bayi  the             } the}

The use and difference of FileStream, StreamReader and StreamWriter