Simple Loader image for Visualforce Page.

Hello guys,

I am gonna show you simple way to pop up loader image i.e status image for loading purpose using CSS and javascript function.

Using simple html div and Javascript you can create your status loader.

Below i am gonna show you simple html tag for it. you can call javascript function on onclick method to show loader and hide it on oncomplete.

ADD BELOW STYLE TO YOUR VF PAGE

#filter{ 
      display:none;
      background-image: url({!URLFOR($Resource.Static_Resource_Main,'Static_Resource_Main/loading32.gif')});
      z-index:10000;
      position:fixed;
      top:0%;left:0%;
      width:100%;
      height:100%;
      background-repeat:no-repeat;
      background-position:center;
      background-color: #ffffff;
      opacity:0.6;
      filter:alpha(opacity=50);
} 

Call startProces method when you call action( Controller function or any function after which you want to show loading image).

 

function startProcess()
{
      $('#filter').show();
}

function endProcess ()
{
      $('#filter').hide();
}   

Add below Div tag at the start of body tag or form.

<center>
    <div id="filter"></div>
</center>                        

startProcess will add display: block css to div.
endProcess  will hide the div.

Its just awsomeness of css.

Hope you will like it.
Enjoy coding....

How to know how many records where sucess and failed in batch class?

Lets say you want to send an email to some user on end of batch class that how many records where successfully executed and how many were failed to be executing.

Its very simply to do if you know the Object used to store data related to Async jobs.

There is called Standard object named AsyncApexJob which store information of jobs runs.

You can query on AsyncApexJob object to get record of currently run batch by its Batch id in finish method.

Fields to be Used:

JobItemsProcessed: Number of job items processed. Label is Batches Processed.

NumberOfErrors: Total number of batches with a failure. A batch is considered transactional, so any unhandled exceptions constitute an entire failure of the batch. Label is Failures.

global void finish(Database.BatchableContext BC) {
 
 
//Below code will fetch the job Id

 AsyncApexJob a = [Select a.TotalJobItems, a.Status, a.NumberOfErrors, a.JobType, a.JobItemsProcessed, a.ExtendedStatus, a.CreatedById, a.CompletedDate From AsyncApexJob a WHERE id = :BC.getJobId()];             

}
                            

you can use above code to send mail with details of job.

Hope you will find it useful.

For more details of Object visit: Here