我在用dotnet做一個項目的過程中，遇到了一個listbox的問題：通過在一個listbox中雙擊，把選中的項添加到另一個listbox中，但listbox控件本身并沒有該事件，那么如何實現呢？我就想到了客戶端腳本javascrit,通過查閱相關資料,終于把這個問題解決了，現在寫出來與大家分享，希望能對大家有所幫助。
        這里有三個問題：
        第一：雙擊所要執行的javascript代碼是什么？
                    注意：javascript代碼的語法要正確，即每一行都要以“；”結尾；
                    function change()
                        {
                             var addoption=document.createelement("option");
                             var index1;
                             if(document.form1.listbox1.length==0)return(false);
                              index1=document.form1.listbox1.selectedindex; 
                             if(index1<0)return(false);
                              addoption.text=document.form1.listbox1.options(index1).text;
                              addoption.value=document.form1.listbox1.value;
                             document.form1.listbox2.add(addoption);
                             document.form1.listbox1.remove (index1);
                         }
        第二：如何將 javascript 代碼轉換為c#代碼？
                    public static void listbox_dblclick(page page,system.web.ui.webcontrols.webcontrol webcontrol,string                                 sourcecontrolname,string targetcontrolname)
                     {
                           sourcecontrolname = "document.form1." +  sourcecontrolname;
                           targetcontrolname = "document.form1." +  targetcontrolname;

 string js = "<script language=javascript> function change(sourcecontrolname,targetcontrolname)";
                           js += "{";
                           js +=     "var addoption=document.createelement( option ); /n";
                           js += "  var index1; /n";
                           js += "if(sourcecontrolname.length==0)return(false);/n";
                           js += "  index1=sourcecontrolname.selectedindex; /n ";
                           js += "  if(index1<0)return(false);/n";
                           js += " addoption.text=sourcecontrolname.options(index1).text; /n";
                           js += "addoption.value=sourcecontrolname.value; /n";
                           js += "targetcontrolname.add(addoption); /n";
                           js += "sourcecontrolname.remove (index1) /n";                            js +="}";
                           js += "</script>";
                            //注冊該 javascript ；
                           page.registerstartupscript("",js);
                            //為控件添加雙擊事件；
                           webcontrol.attributes.add("ondblclick","change(" + sourcecontrolname + "," + targetcontrolname +                                 ");");
                      }
           &nbsp;        在該方法中,sourcecontrolname是要綁定雙擊事件的控件，targetcontrolname是接收雙擊事件選定項的控件。    
                    這里有一個問題，如何讓對象作為參數傳給javascript的change函數，我這里采用的是用  sourcecontrolname  ,targetcontrolname 來傳遞兩個listbox的name, 然后與“document.form1.“組合成一個串來傳遞給javascript的change函數，即
                            sourcecontrolname = "document.form1." +  sourcecontrolname;
                           targetcontrolname = "document.form1." +  targetcontrolname;

        第三：如何為控件添加雙擊事件？
                    用controlname.attributes.add(“屬性名稱”，“函數名稱或代碼”);