jsf - Dynamic dropdown is not coming -
while selecting dropdown,the second drop down values not coming properly.i attaching code here xhtml file:
<?xml version="1.0" encoding="utf-8"?> <!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html"> <h:head> <f:event listener="#{userdata.handleevent}" type="prerenderview" /> </h:head> <h:body> <f:view> <h:form > <table> <tr> <td> <h:messages showdetail="true" /> </td> </tr> <tr> <td><h:outputtext value="enter name : "/></td> <td><h:inputtext value="#{userdata.clientname}"/></td> </tr> <tr> <td><h:outputtext value="enter id : " /></td> <td><h:inputtext value="#{userdata.id}" /></td> </tr> <tr> <td></td> <td><h:commandbutton value="insert" action="#{userdata.add}"/></td> </tr> <tr> <td></td> <td>#{userdata.data}</td> </tr> <tr> <td><h:selectoneradio value="#{authordata.favcolor1}" id="div2"> <f:selectitem itemvalue="red" itemlabel="color1 - red" /> <f:selectitem itemvalue="green" itemlabel="color1 - green"/> <f:ajax event="click" binding="valbinding" execute="@form" render=":div1" listener="#{authordata.setchangeval}"/> </h:selectoneradio></td> </tr> </table> </h:form> <h:panelgroup id="div1" style="display: #{authordata.valdisplay};"> <span> have selected #{authordata.message} </span> </h:panelgroup> </f:view> <br/> <h:outputlabel value="choose car: * " for="firstdropdwn" /> <h:selectonemenu id="firstdropdwn" value="#{authordata.favoritecar2}"> <f:selectitems value="#{authordata.car4list}" var="d" itemlabel="#{d.carlabel}" itemvalue="#{d.carvalue}"/> <f:ajax event="click" binding="valbinding1" execute="@this firstdropdwn" render=":seconddrpdown" listener="#{authordata.setdropdwnval}"/> </h:selectonemenu> <br/> <h:outputlabel value="choose owner: * " for="seconddrpdown" /> <h:selectonemenu id="seconddrpdown" value=""> <f:selectitems value="#{authordata.car3list}" var="c" itemlabel="#{c.carlabel}" itemvalue="#{c.carvalue}"/> </h:selectonemenu> </h:body> </html> author.java:
import java.io.serializable; import java.sql.connection; import java.sql.drivermanager; import java.sql.preparedstatement; import java.sql.resultset; import java.sql.sqlexception; import java.util.arraylist; import java.util.collection; import java.util.iterator; import java.util.linkedhashmap; import java.util.linkedlist; import java.util.list; import java.util.listiterator; import java.util.map; import javax.faces.bean.managedbean; import javax.faces.bean.sessionscoped; import javax.faces.bean.viewscoped; import javax.faces.component.uicomponent; import javax.faces.event.ajaxbehaviorevent; import javax.faces.event.componentsystemevent; @managedbean(name = "authordata", eager = true) @sessionscoped public class author implements serializable { private static final long serialversionuid = 1l; string clientname; string id; string favcolor1; public string favoritecar2; private uicomponent valbinding; private uicomponent valbinding1; public list<car> car3list; /*public car[] getfavoritecar3value() { car3list = new car[3]; car3list[0] = new car("bmw series 4 - 316", "316"); car3list[1] = new car("bmw series 4 - 318", "318"); car3list[2] = new car("bmw series 4 - 320", "320"); return car3list; } */ public list<car> getcar3list() { return car3list; } public void setcar3list(list<car> car) { this.car3list = car; } public list<car> car4list; public list<car> getcar4list() { car4list = new arraylist<car>(); car4list.add(new car("bmw","116")); car4list.add(new car("audi","118")); car4list.add(new car("mercedes","120")); return car4list; } public uicomponent getvalbinding1() { return valbinding1; } public void setvalbinding1(uicomponent valbinding1) { this.valbinding1 = valbinding1; } private string valdisplay="none"; private string message; public string getfavoritecar2() { return favoritecar2; } public void setfavoritecar2(string favoritecar2) { this.favoritecar2 = favoritecar2; } private static map<string, string> favoritecar2value; static { favoritecar2value = new linkedhashmap<string, string>(); favoritecar2value.put("bmw series 1 - 116", "116"); //label, value favoritecar2value.put("bmw series 1 - 118", "118"); favoritecar2value.put("bmw series 1 - 120", "120"); } public map<string, string> getfavoritecar2value() { return favoritecar2value; } public string getmessage() { return message; } public void setmessage(string message) { this.message = message; } public string getvaldisplay() { return valdisplay; } public void setvaldisplay(string valdisplay) { this.valdisplay = valdisplay; } public uicomponent getvalbinding() { return valbinding; } public void setvalbinding(uicomponent valbinding) { this.valbinding = valbinding; } public string getid() { return id; } public void setid(string id) { this.id = id; } public string getclientname() { return clientname; } public void setclientname(string clientname) { this.clientname = clientname; } public string getfavcolor1() { return favcolor1; } public void setfavcolor1(string favcolor1) { this.favcolor1 = favcolor1; } public void setchangeval(ajaxbehaviorevent e){ this.setvaldisplay("none"); if(this.getfavcolor1().equalsignorecase("red")){ this.setvaldisplay("block"); this.setmessage("red"); }else if(this.getfavcolor1().equalsignorecase("green")){ this.setvaldisplay("block"); this.setmessage("green"); } } public void setdropdwnval(ajaxbehaviorevent e){ if(this.getfavoritecar2().equalsignorecase("116")){ linkedlist<car> ob = new linkedlist<car>(); ob.add(new car("aife","0")); ob.add(new car("anirban","1")); this.setcar3list(ob); }else { linkedlist<car> ob1 = new linkedlist<car>(); ob1.add(new car("saife","0")); ob1.add(new car("abid","1")); this.setcar3list(ob1); } } } car.java:
import java.io.serializable; public class car implements serializable { public string carlabel; public string carvalue; public car(string carlabel, string carvalue) { this.carlabel=carlabel; this.carvalue=carvalue; } public string getcarlabel() { return carlabel; } public void setcarlabel(string carlabel) { this.carlabel = carlabel; } public string getcarvalue() { return carvalue; } public void setcarvalue(string carvalue) { this.carvalue = carvalue; } } the second dropdown down not coming properly.in listener method of first dropdown value first drop down not 116/118/120. ***the dbms portion ignored.i had put implementation.
i able spot several problems.
you closed
h:formafter group of radio buttons, continued put other elements outside form. similarly,f:viewclosed right after panel group, yet other form elements appear after one. move closing tagsh:form,f:viewright after closing tag of lasth:selectonemenu(in order), should fix 1 part of problem.both of
f:ajaxboundclick, changechange, otherwise actions performed when user, example, opens dropdown.both of
f:ajaxhaverenderdefined starting colon - had remove colon, otherwise elements not found.the "choose owner" dropdown's
valuebound empty string, not correct. changevalue="#{authordata.favoritecar2}".the method
author.getcar4list()creates new list each time called. consider keepingreturn car4list;there , moving creation separate method, annotated@postconstructcalled once:@postconstruct private void init() { car4list = new arraylist<car>(); car4list.add(new car("bmw", "116")); car4list.add(new car("audi", "118")); car4list.add(new car("mercedes", "120")); }
i hope these changes made, cannot recall there else needed.
userdata definition not part of code shared here, had replace of these references authordata , remove few of them, should not have impact things mentioned above.
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