C # IO reads the specified number of rows

1. Using the file class to return an array of string[] with each row, it is highly recommended to use

 Public Partialform1:form{string[] lines;  PublicForm1 () {InitializeComponent (); }           Private voidForm1_Load (Objectsender, System.EventArgs e) {Lines= File.ReadAllLines ("TextFile1.txt"); //The first line is displayed in the TextBox1            if(lines. Length >0) {TextBox1.Text= lines[0]; }            //the second line is displayed in the TextBox2            if(lines. Length >1) {TextBox2.Text= lines[1]; }     }}

2. c#2.0 before, FileStream, not recommended

usingSystem.IO Public Partialform1:form{List<string>lines;  PublicForm1 () {InitializeComponent (); //hold a collection of all rowsLines =Newlist<string>(); }           Private voidForm1_Load (Objectsender, System.EventArgs e) {FileStream FS=NewFileStream ("TextFile1.txt", FileMode.Open); StreamReader Rd=NewStreamReader (FS); strings; //reads all the lines of the file into the List<string> collection             while(S= Rd. ReadLine ())! =NULL) {lines.            ADD (s); } Rd.            Close (); Fs.            Close (); //The first line is displayed in the TextBox1            if(lines. Count >0) {TextBox1.Text= lines[0]; }            //the second line is displayed in the TextBox2            if(lines. Count >1) {TextBox2.Text= lines[1]; }     }}

C # IO reads the specified number of rows