Some data in asp.net is bound.

Using System;
Using System. Collections;
Using System. ComponentModel;
Using System. Data;
Using System. Drawing;
Using System. Web;
Using System. Web. SessionState;
Using System. Web. UI;
Using System. Web. UI. WebControls;
Using System. Web. UI. HtmlControls;
Namespace net2
{
/// <Summary>
/// Summary of WebForm5.
/// </Summary>
Public class WebForm5: System. Web. UI. Page
{// Protected protection type. If you want to access a page of aspx, you must use the private estimation of the protection type or above.
Protected System. Web. UI. WebControls. DropDownList DropDownList1;
Protected System. Web. UI. WebControls. ListBox ListBox1;
Protected System. Web. UI. WebControls. RadioButtonList RadioButtonList1;
Protected System. Web. UI. WebControls. Label Label1;
Protected System. Web. UI. WebControls. Button Button1;
Protected System. Web. UI. WebControls. Label Label2;
Protected System. Web. UI. WebControls. Label Label3;
Protected System. Web. UI. WebControls. Label Label4;
Protected System. Web. UI. WebControls. CheckBoxList CheckBoxList1;

Private void Page_Load (object sender, System. EventArgs e)
{
// Place user code here to initialize the page
// Some WEB controls, if not selected. Then retrieve its value. Then it will go wrong.
If (! IsPostBack)
{
// The first one is an array.
String [] str1 = new string [3] {"*", "**", "***"}; // There is also a method to define an array string [] str1 = new string [3]; str1 [0] = ""; in the initial value
// Do not understand the meaning of array. Chinese characters can also be used here
ArrayList option = new ArrayList ();
Option. Add ("first ");
Option. Add ("second ");
Option. Add ("third ");
Option. Add ("fourth ");
Option. Add ("fifth ");
// Hashtable cannot be sorted!
Hashtable HT = new Hashtable ();
HT. Add ("1", "");
HT. Add ("2", "B ");