ajax+options is null or not an Object

Home Answers Viewqa Ajax ajax+options is null or not an Object

chinna

ajax+options is null or not an Object
2 Answer(s) a year and 7 months ago
Posted in : Ajax

HI i have developed a simple ajax application contains two drop down lists and and one search button when i seleted a mangername from the popuated dropdwon list its dispalyed all the employee names on selection of the employee name and i kept search it should dispalay me the employee details when i click on search button its saying options is null or not an Obejct..

here im sending my code

select.jsp

<%@page import="java.sql.*"%>
 <html>
      <head>  
      <script language="javascript" type="text/javascript">  
      var xmlHttp  
      var xmlHttp
      function showEmp(str){
      if (typeof XMLHttpRequest != "undefined"){
      xmlHttp= new XMLHttpRequest();
      }
      else if (window.ActiveXObject){
      xmlHttp= new ActiveXObject("Microsoft.XMLHTTP");
      }
      if (xmlHttp==null){
      alert("Browser does not support XMLHTTP Request")
      return;
      } 
      var url="getemp.jsp";
      url +="?managername="+str;
      alert(url);
      xmlHttp.onreadystatechange = stateChange;
      xmlHttp.open("GET", url, true);
      xmlHttp.send(null);
      }

      function stateChange(){   
      if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){   
      document.getElementById("empname").innerHTML=xmlHttp.responseText

      }   
      }


      function searchDetails(){
          var combo = document.getElementsByName("empname");
         //alert(combo.options[combo.selectedIndex].text);
          var str = combo.options[combo.selectedIndex].value;

          alert("val of str is "+str);
          if (typeof XMLHttpRequest != "undefined"){
              xmlHttp= new XMLHttpRequest();
              }
              else if (window.ActiveXObject){
              xmlHttp= new ActiveXObject("Microsoft.XMLHTTP");
              }
              if (xmlHttp==null){
              alert("Browser does not support XMLHTTP Request")
              return;

              } 

          var url="check.jsp";
          url +="?count="+str;
          alert(str);
          xmlHttp.onreadystatechange = stateChange1;
          xmlHttp.open("GET", url, true);
          xmlHttp.send(null);
          }

          function stateChange1(){   
          if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
           document.getElementById("data").innerHTML=xmlHttp.responseText


                          }   
          }

      </script>  
      </head>  
      <body>  
      Select ManagerName:<select name='managername' onchange="showEmp(this.value)">  
       <option value="none">SelectManagername</option>  

    <%
 Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","hr","hr");  
 Statement stmt = con.createStatement();  
 ResultSet rs = stmt.executeQuery("Select * from employee_table1");
 while(rs.next()){
     %>
      <option value="<%=rs.getString(3)%>"><%=rs.getString(3)%></option>  
      <%
 }
     %>
      </select>  

      <br>  
      <div id='empname'>  
      <select name='empname' >  
      <option value='-1'></option>  
      </select> 
           </div>  
       <input  type='button'   value= 'SearchforempDetails' onclick='searchDetails();' >
           <div id='data'>  
      <table name='data' >  
      </table>  
      </div>
      </body>
      </html>

getemp.jsp

<%@page import="java.sql.*"%>
<%
String managername=request.getParameter("managername");  
 String buffer="<select name='empname'><option value='-1'>SelectEmployeeName</option>";  
 try{
 Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","hr","hr");  
 Statement stmt = con.createStatement();  
 ResultSet rs = stmt.executeQuery("Select * from employee_table1 where managername='"+managername+"' ");  
   while(rs.next()){
   buffer=buffer+"<option value='"+rs.getString(2)+"'>"+rs.getString(2)+"</option>";  
   }  
 buffer=buffer+"</select>";  
 response.getWriter().println(buffer); 
 }
 catch(Exception e){
     System.out.println(e);
 }

 %>

check.jsp

<%@page import="java.sql.*"%>
<%
String empname=request.getParameter("count");  
 String buffer="<table name='data'>";  
 try{
 Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","hr","hr");  
 Statement stmt = con.createStatement();  
 ResultSet rs = stmt.executeQuery("Select * from employee_table1 where empname='"+empname+"' ");  
   while(rs.next()){
   buffer=buffer+"<tr><td>"+rs.getString("empcode")+"</td><td>"+rs.getString("org")+"</td></tr>";  
 }  
 buffer=buffer+"</table>";  
 response.getWriter().println(buffer); 
 }
 catch(Exception e){
     System.out.println(e);
 }
  %>
   <%=empname%>

Database table table name employee_table1;

and empcode, empname, managername, org are columns

Pls help me

Thanks in Adavace

View Answers

November 2, 2011 at 4:03 PM

Please visit the following links:

http://www.roseindia.net/answers/viewqa/JSP-Servlet/14516-By-dropdownlist-retrive-data-from-database--and-show-in-textbox-in-jsp..html

http://www.roseindia.net/jsp/comboSelect.shtml

November 4, 2011 at 12:03 PM

hi Thanks,

I figured out the solution

ajax+options is null or not an Object
ajax+options is null or not an Object HI i have developed a simple ajax application contains two drop down lists and and one search button when i... dispalay me the employee details when i click on search button its saying options

check null exception java
when we call or perform some action on the object or value when it null... if the object is null or assigned some value to it before performing action...check null exception java check null exception java - How to check

Httpservletresponse null pointer exception.
Httpservletresponse null pointer exception. What is Httpservletresponse null pointer exception? NullPointerException occurs when we try to implement an application without referencing the object and allocating

Null value when i set interface object in form controller - Spring
Null value when i set interface object in form controller Hi all, i am very new about spring and hibernate. i got null value when i set interface object in form Controller. public void setOHBillManager(OHBillManager

Null Pointer Exception
Null Pointer Exception whis is the Null Pointer Exception in java? or define Null Pointer Exception with exp? NullPointerException occurs, when you try to implement an application without referencing the object

mysql query for null value
mysql query for null value What mysql query for null value i need... { //echo message } To check if the object contain any value or not ..just compare it with zero. If the value for object is greater than zero display

Java null pointer exception
Java null pointer exception Hi I've made an array of Book objects... and a short summary. A Book object also contains the appropriate constructor...]!=null){ if(strfield.contains(param)){ result+=library[counter

The null keyword
The null keyword The null keyword in java programming language is a reserved word that is used... how to declare and define null values in java programming language

Java null pointer exception handling
: java.lang.NullPointerException occurs when it tries to invoke a null object, at the time...Java null pointer exception handling What... program? Is this extends from exception class of Java? Java null

Null pointer exception in hibernate - Hibernate
Null pointer exception in hibernate Hi i am getting null pointer... is compiled successfully but while running the program i am getting null ponter exception. SessionFactory object is not creating pls give me the solution

SPEL-Wiring Null
: ------------------------------------- Person Object in MyClass: null...SpEL: Wiring Null Spring 3 provides powerful Expression Language which can be used to wire a property to null . Lets take an example to demonstrate how

Vector object[]
= (Object[])value; // cast to array of Object if (splitVal != null...Vector object[] I want to create payslip in java public Vector...(); Object[] value = new Object[] {"Employee Name",f.ename.getSelectedItem

Null Pointer Exception
. Usually in the case of object references, it is null. Object references..., while in a Java object reference refers to an object of known type, or be null... be wrong, y refers to a different object or the reference of object y is null

null pointer
null pointer dear sir , what is mean by null pointer in c

object 2 string - Java Beginners
object 2 string hi sir,how to convert object to string and how 2 compare object with null value to string with null value plz provide a program 4 this sir,plzzzzzzzzz

java.lang.NumberFormatException: null
java.lang.NumberFormatException: null I get org.apache.jasper.JasperException: java.lang.NumberFormatException: null exception when i submit the form plz help me regarding

null interface
null interface what is the null interface and what is the use of it in real java project ? Hi Friend, A null interface is an interface without any methods.Is also known as Marker interface. Null interfaces are used

object
object is it possible to create object in the same class..?. Yes, you can. class CreateObject { CreateObject(){ System.out.println("I have an object."); } public static void main(String[] args

Problem in request object
;center> <% try { String hello = null; String aplication=null; String region=null; String description=null; String path1=null; out.println(request); path1... con = null; out.println(aplication +" "+region+" "+description+""+path1

Request Object In JSP
Request Object In JSP This section illustrates more about the JSP implicit object called Request object. This object retrieves values whatever client passes

removeAttribute() Method Of The Request Object
removeAttribute() Method Of The Request Object... for the method removeAttribute() of the request object. This method removes..., you will get the null value. In this section, you will see more about

getAttribute() Method Of The Request Object
getAttribute() Method Of The Request Object... for the illustration of the getAttribute() method of the request object in JSP... that is set through the setAttribute() method of the request object. The getAttribute

Bussiness Object API - JSP-Servlet
Bussiness Object API I m feteching the reports from CMS server... bw = new BufferedWriter(pw); CrystalReportViewer viewer = null; IEnterpriseSession enterpriseSession = null; if (enterpriseSession == null

getQueryString() Method Of The Request Object
getQueryString() Method Of The Request Object... the getQueryString() method of the request object. Here, you will learn more... of the request object is used for getting the query string which is the values

Persist a List Object in Hibernate - Hibernate
Persist a List Object in Hibernate Hi All, I have a query on hibernate. How to persist a List object in Hibernate ? Can you give me...) { // TODO Auto-generated method stub Session sess = null; try

Creating JDBC Statement object
; } Creating JDBC Statement Object JDBC Statement is an interface of java.sql.... object. This result set object contains the result of the query. Statement... object you first need to create Connection object because statement object

Data Access Object
Creating Data Access Object (DAO) Design Pattern The Data Access Object.... It provides a technique to separate the object persistence and data access logic... = null; List users = new ArrayList<User>(); try { transaction

JSP implicit object "application"
JSP IMPLICIT OBJECT application In this section, we will discuss about JSP implicit object 'application' and it's uses with an example. Using "application" object you can share data with all pages

JSP implicit object "request"
JSP implicit object "request" In this section, we will discuss about the implicit object "request" and its uses with an example. The 'request' object takes the value from the web browser and pass

getAttributeNames() Method Of The Request Object
getAttributeNames() Method Of The Request Object... object in JSP. Here, you will learn why this is used and how it is used... that gets the request and response object sent by the RequestDispatcher

JSP implicit object "pagecontext"
JSP IMPLICIT OBJECT pagecontext A PageContext instance provides access... and pageContext are implicit JSP Objects. The page object represents... is, and consequently do not normally make use of this object or its methods

PDO Fetch Object
PDO Fetch Object: This is another way to access the data of a table, accessing fields as object. By using this method we get the result set as anonymous object and this object represents the field names of the table as object

JDBC Insert Null
JDBC Insert Null ... in understanding JDBC Insert Null. The program include a class JDBC Insert Null.... The DriverManager.getConnection ( )return you a connection object

javascript null mean
javascript null mean What does javascript null mean

setAttribute() Method Of The Request Object
setAttribute() Method Of The Request Object... the best illustration about the setAttribute() method of the request object in JSP... the request object through the dispatcher method. The set value of the attribute

null pointer exception in java
null pointer exception in java What is null pointer exception in Java and when it occurs? Show it with an example.Thanks! Java Null Pointer Exception

disallow NULL values in a table.
disallow NULL values in a table. How do I disallow NULL values in a table

array_merge null - PHP
array_merge null i am using the array_merge and getting the unusual null error...any help

Maximum Solutions - Specialists in Object Orientation
[] with the String object. If you changed the StringBuffer after calling toString...) { if (instance == null) { instance = new Singleton2...-initialised object to the caller of getInstance(). So I would not write

Limit the Class Object Creation
Limit the Class Object Creation In this section you will learn about how a class object creation can be a restricted to a fix number of times... to restrict the object creation of a class. This is a simple code in Java where I have

What is NOT NULL Constraint?
What is NOT NULL Constraint? What is NOT NULL Constraint? Hi, The NOT NULL constraint enforces a column to NOT accept NULL values.The NOT NULL constraint enforces a field to always contain a value. This means

if variable is null php
if variable is null php How to check if submitted variable is null in PHP? Thanks! Check if Variable is NULL in PHP You can use isset($var) to check if the variable is not defined or null in PHP. and after setting

Creating Data Access Object (DAO) Design Pattern
Creating Data Access Object (DAO) Design Pattern Data Access Object... to separating the object persistence and data access logic. All the basic data access... connectionFactory = null; private ConnectionFactory() { try { Class.forName

comparison with null - Framework
comparison with null String value = txtfld.getText(); if (value == null) ----- failing step----control goes to else part { // some code... friend, if (value == null) works properly for comparision For any more

Output of null value
main(String [] args){ String str=null; System.out.println(str); } } Output value Null Description:- In the given example... a String variable and initialized it with null value

Stumped with NOT NULL AUTO_INCREMENT
Stumped with NOT NULL AUTO_INCREMENT I've almost made it through my... to create a new table with the ID column being NOT NULL AUTO_INCREMENT. The table will create if I do not have NOT NULL AUTO_INCREMENT, but it WILL NOT create

comparison with null - Framework
comparison with null I am having one textfield, from which I am getting text using getText() method. Now I want to compare this value with null (i.e. to check whether the entered value is null or not) How should I check

array_merge null - PHP
array_merge null i am using the array_merge and getting the unusual null error...any help? Hi Friend, Please visit the following links: http://www.roseindia.net/tutorial/php/phpbasics/PHP-Array-Merge

Server_Gives_Null_Response
Server_Gives_Null_Response I have one InternetServer.java which starts a server at port 10000. In same class i have started a server at different...) to client class it always sends null and it shows NULL value only when i stop

More than 1 preparedStatement object - Java Beginners
one prepared Statement object using batch update.. Explain with a code using... Statement object in the java class.Try the following code: import java.sql....(String args[]) { Connection con = null; PreparedStatement

Latest
Frameworks
Category