Barcode In Salesforce

<apex:page standardController="Product__c" extensions="BarCodeCon" sidebar="false">

<script>

function checkAll(cb)

{

var inputElem = document.getElementsByTagName("input");

for(var i=0; i<inputElem.length; i++)

{

if(inputElem[i].id.indexOf("checkedone")!=-1)

inputElem[i].checked = cb.checked;

}

}   

</script>

  <apex:form >

  <apex:pageBlock >

   <apex:pageBlockSection title="Enter Product Details" >

     <apex:inputField value="{!Obj.name}" />

     <apex:inputField value="{!Obj.price__c}" />

     <apex:inputField value="{!Obj.code__c}" />

    

     <apex:commandButton value="save" action="{!save}"/>

   </apex:pageBlockSection>

  </apex:pageBlock>

   <apex:pageBlock > 

      <apex:pageBlockSection title="Product Details" columns="100">

   

  

  

     <apex:dataTable value="{!rec}" var="m" columns="10" columnsWidth="20px" > 

      

                   <!-- <apex:column >

                        <apex:facet name="header">

                            <apex:inputCheckbox >

                            <apex:actionSupport event="onclick" action="{!selrec}" onsubmit="checkAll(this)" rerender="Selected"/>

                            </apex:inputCheckbox>

                        </apex:facet>

                        <apex:inputCheckbox id="Selected">

                           <apex:actionSupport event="onclick" action="{!selrec}" rerender="Selected"/>

                        </apex:inputCheckbox>

                    </apex:column>-->

                     <apex:column value="{!m.product.name}" />

                     <apex:column value="{!m.product.price__c}" />

                     <apex:column value="{!m.product.Barcode__c}" />

                 

                    

                 

          

             </apex:dataTable>

     </apex:pageBlockSection>

      <apex:pageBlockButtons >

                <!--<apex:commandButton value="Convert" action="{!convert}"/>-->

             </apex:pageBlockButtons>

            

   </apex:pageBlock> 

     

   

  </apex:form>

</apex:page>

public with sharing class BarCodeCon {

 public BarCodeCon(ApexPages.StandardController controller) {}

             

      

    public string Obj{set;}

    Product__c ob;

    public Product__c getObj(){

   

      ob=new Product__c();

      return ob;

    }

   

     public void save(){

     

      insert ob;

   

    }

   

   public string rec{set;}

   List<Product__c> li;

   public List<productwrapper> getrec(){

      productList.clear();

    

     for(product__c p:[select name,price__c,barcode__c from Product__c]){

    

     productList.add(new productWrapper(p));

    return productList;

     }

   

     return productList;

   }

  

    List<SelProduct__c> storeli=new List<SelProduct__c>();

    public void convert(){

        SelProduct__c s;

       for(Product__c p:selectedproducts){

         

          s=new SelProduct__c();

          s.name=p.name;

         // storeli.add(s);

       }

         insert s;

  

    }

   

     List<Product__c > selectedproducts = new List<Product__c >();

  

     List<productWrapper> productList = new List<productWrapper>();

   

     public PageReference selrec() {  //getselected

   

       selectedproducts.clear();

      

        for(productWrapper pwrapper : productList )

        if(pwrapper.selected == true)

        selectedproducts.add(pwrapper.product);

       

      

     return null;

    }

   

   

     

      public class productWrapper{

       

          public Product__c product{get; set;}

        public Boolean selected {get; set;}

   

      

        public productWrapper(Product__c b)

        {

            product= b;

            selected= false;

        }

    }

}