.NET compound control input drop-down control

Use System;
Use System.Collections.Generic;
Use System.ComponentModel;
Use System.Text;
Use System.Web;
Use System.Web.UI program;
Use System.Web.UI.WebControls; Used in
System.Collections;

namespace QC_Control
{
  ///

  ///Customized input drop-down box class
  ///

 [ToolboxData("< ;{0}:CustomInputDropdownControl RUNAT=Server> DropDownList(); // Dropdown box
Private TextBox TxtBox = new TextBox();
_values ​​of private Hashtable = new Hashtable(); //The value used to bind the drop-down box

          ///

                                       Value reference variable setting/getting encapsulated method ///

Items that expose Hashtable ViewState of {

                                                                 Value"] = new Hashtable();

                                                                                                                                                             . ”] = value; }
}


                                                                                                                                                                   
                     Public CustomInputDropdownControl ()
                                                                                                                                                                 
               ///Rewrite the control class Rendering method body
         ///  
                                                                                                                                                                                                                                                             . ID = "DDL" + base.ID;
        TxtBox.ID = "TXT"                                                                               using use with use with use using           using using       through using    ‐           ‐ ‐                                                                                                                            --- in print, in, " ='0'> ");
//The reason why clientID is used here is because when in the card option, the .NET program will automatically name the base.ID
        ddlListItem.Attributes.Add ("onChange", getFocusValue (TxtBox.ID, ddlListItem.ID) ; Height: 15px; Border: 0pt;");
                                                                                                                                                                                                    . Keys key)
                                                     ListItem item = new ListItem();
                                                                                                                       ListItem         ); Output); t OUTPUT.WRITE ("& lt;/ span & gt; & lt; span style = 'location is: absolute; border top: solid is 1pt # c1C1C1C1; It is 1pt # C1C1C1; width: 170 pixels, height: 19px; "& gt;");
txtbox.RenderControl ;; "/ +"CRIPT:"+" document.getElementById('"+TxtId +"').value = document.getElementById('"+ddlId +"') available options [document.getElementById('"+ddlId +"').selectedIndex] .value;"ToString();