[SalesForce] Preview Email template within Visualforce page, some throw an error

I have a custom page to preview and render Email templates,
now i came across that some (not many) templates will exceed the view state of the page ( max 137kb)
As I need the function to replace text within the template the displayed variable (transient) needs to be at some point be reassigned with a new value, but as soon i do that in the code (touching the value of that var again by assigning a new string the page drops out with the view state exceeded error (already on loading the page after selecting the template) if I don't "touch" the variable all is fine
here is how i show the preview.

<apex:pageBlockSection title="Preview" columns="1"> 
            <apex:outputText value="{!theTempl}" escape="false" />
</apex:pageBlockSection>

some other templates on the other hand work fine but one of them throws an error
STRING_TOO_LONG, HTML Body: data value too large:
As soon it goes to be assembled in a complete email
But I could not find any limits for the EmailTemplate htmlValue

1) Does anyone got an idea how to avoid this view state thing, as this is only on some templates
2) How can I avoid this String too Long error, when all other actions ( string replace) went fine and only next stop is to send out the email

Thanks

Best Answer

I would refer you to the following docs/posts related to view state to help you troubleshoot the problems you're having with your templates. In some case, its a matter of needing to define your variables as transient to reduce the view state. It can also be one of needing to reduce the number of forms on the page, accessing too many objects at once, or simply needing to optimize your queries so you return only the info that's needed. Here's a list of docs and posts I think you'll find the most helpful to you:

Related Solutions

[SalesForce] Dynamically displaying, adding, and deleting attachments from email template before sending email

Update one more time : The code below can send email, add attachements, delete attachments on the fly and reload the same page to send more emails. Page:

<apex:page standardController="contact" extensions="custom_button_controller" id="ThePage">
<apex:includeScript value="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.js"/>
<apex:includeScript value="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/jquery-ui.js"/>
    <apex:form id="theForm">
        <apex:pageBlock id="theBlock" mode="inlineEdit">
                <apex:outputLabel value="To  "/>
                <apex:outputField value="{!Contact.name}"/>
                <br/>
                <br/>
                <apex:outputLabel value="Cc  "/>
                <apex:inputtext value="{!Cc}"/>
                <br/>
                <br/>
                <apex:outputLabel value="Subject  "/>
                <apex:outputField value="{!emailTemp.subject}"/>
                <br/>
                <br/>
                <p> Body </p>
                <apex:inputTextarea value="{!emailTemp.HtmlValue}" richText="true" rows="25" cols="100"/>
                <br/>
                <br/>
                <apex:commandButton action="{!sendEmail}" value="Send Email" id="theButton"/>
        </apex:pageBlock>




    <apex:pageblock title="Attachments">
    <apex:commandButton value="New Attachment" action="{!attach_new}"/>
    <apex:commandButton value="delete" action="{!getSelected}" />
        <apex:pageblocktable value="{!Selectedattachments}" var="a">
            <apex:column headerValue="Select to Delete ">
            <apex:inputCheckbox value="{!a.selected}" id="checkedone">
            
            </apex:inputCheckbox>
            </apex:column>
           <apex:column headerValue="Attachment Id"   value="{!a.acc.id}"/>
           <apex:column headervalue="Attachment Name" value="{!a.acc.name}"/>
        </apex:pageblocktable>
        
    </apex:pageblock>
    </apex:form>
  
</apex:page>

Controller :

 public class custom_button_controller {

            string contact_id{get;set;}
            public EmailTemplate emailTemp{get;set;}
            public string cc{get;set;}
            List<attachwrapper> attach= new List<attachwrapper>();
            list<attachment> selectedAttach = new list<attachment>();
            List<attachment> attach_criteria = new List<attachment>();

            public string Attach_to_delete_Id{get;set;}
            contact c;

            public List<string> cc_addresses{get;set;}
            public custom_button_controller(ApexPages.StandardController controller) {

                   contact_id = apexpages.currentpage().getparameters().get('id');
                   c = [Select FirstName from contact where id=: contact_id];
                   emailTemp  = [select Subject, Name, Id, HtmlValue From EmailTemplate limit 1];  
                   cc_addresses = new List<string>();  
            }

                public List<attachwrapper> getattach()
                {           
                     attach.clear();
                     if(selectedattach.size() > 0){
                        attach_criteria =  [select id,name from attachment where Id NOT IN: selectedattach and parentId =: '00X50000001XtXB'];
                     }
                     else{
                     attach_criteria = [select id,name from attachment where ParentId =: '00X50000001XtXB'];
                     }

                    for(Attachment a :  attach_criteria ){          
                    attach.add(new attachwrapper(a));}       
                    return attach ;
                }
                public PageReference getSelected()
                {

                    selectedattach.clear();
                    for(attachwrapper awrapper : attach){
                    if(awrapper.selected == true){                 
                    selectedattach.add(awrapper.acc);}   
                    }
                    return null;
                }
                public List<attachwrapper> GetSelectedattachments()
                {
                    if(selectedattach.size()>0){                     
                    return getattach();                    
                    }
                    return getattach();
                }   

                public pagereference sendEmail(){
                    if(cc.length() >0 && cc != null){
                        List<string> split_cc = new List<string>();
                        split_cc = cc.split(';');                        
                        for(string s: split_cc){
                            cc_addresses .add(s);
                        }

                    }
                    Messaging.SingleEmailMessage message = new Messaging.SingleEmailMessage();
                    //message.setTemplateId('00X50000001XtXB');
                    message.setTargetObjectId(contact_id);
                    List<Messaging.Emailfileattachment> fileAttachments = new List<Messaging.Emailfileattachment>();

                    for (Attachment a : [select id,name,body from attachment where id IN: attach_criteria])
                    {
                      Messaging.Emailfileattachment efa = new Messaging.Emailfileattachment();
                      efa.setFileName(a.Name);
                      efa.setBody(a.Body);
                      fileAttachments.add(efa);
                    }
                    message.setCcAddresses(cc_addresses );
                    emailTemp.HtmlValue = emailTemp.HtmlValue.replace('{!Contact.FirstName}',c.FirstName);
                    message.setHtmlBody(emailTemp.HtmlValue);
                    message.setFileAttachments(fileAttachments);
                    Messaging.sendEmail(new Messaging.SingleEmailMessage[]{message});
                    return null;
                }

                public pagereference attach_new(){
                pagereference pag = new pagereference('/apex/addattachments');
                pag.getParameters().put('contact_id', contact_id);
                return pag;
                }

            public class attachwrapper{
                public attachment acc{get; set;}
                public Boolean selected {get; set;}
                public attachwrapper(attachment a){
                    acc = a;
                    selected = false;
                }
            } 
}

Page for adding new attachment

Page:

<apex:page controller="AttachmentUploadController">
  <apex:sectionHeader title="Visualforce Example" subtitle="Attachment Upload Example"/>

  <apex:form enctype="multipart/form-data">
    <apex:pageMessages />
    <apex:pageBlock title="Upload a Attachment">

      <apex:pageBlockButtons >
        <apex:commandButton action="{!upload}" value="Save"/>
      </apex:pageBlockButtons>

      <apex:pageBlockSection showHeader="false" columns="2" id="block1">

        <apex:pageBlockSectionItem >
          <apex:outputLabel value="File Name" for="fileName"/>
          <apex:inputText value="{!attachment.name}" id="fileName"/>
        </apex:pageBlockSectionItem>

        <apex:pageBlockSectionItem >
          <apex:outputLabel value="File" for="file"/>
          <apex:inputFile value="{!attachment.body}" filename="{!attachment.name}" id="file"/>
        </apex:pageBlockSectionItem>

        <apex:pageBlockSectionItem >
          <apex:outputLabel value="Description" for="description"/>
          <apex:inputTextarea value="{!attachment.description}" id="description"/>
        </apex:pageBlockSectionItem>

      </apex:pageBlockSection>

    </apex:pageBlock>
  </apex:form>
</apex:page>

Controller:

public with sharing class AttachmentUploadController {
public string contact_Id{get;set;}
  public Attachment attachment {
  get {
      if (attachment == null)
        attachment = new Attachment();
      return attachment;
    }
  set;
  }

  public PageReference upload() {
    contact_Id = apexpages.currentpage().getparameters().get('contact_id');
    attachment.OwnerId = UserInfo.getUserId();
    attachment.ParentId = contact_Id; // the record the file is attached to
    attachment.IsPrivate = true;

    try {
      insert attachment;
    } catch (DMLException e) {
      ApexPages.addMessage(new ApexPages.message(ApexPages.severity.ERROR,'Error uploading attachment'));
      return null;
    } finally {
      attachment = new Attachment(); 
    }

    pagereference pag = new pagereference('apex/testing_emailK?id='+contact_id);
    pag.setredirect(true);
    return pag;
  }

}

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[SalesForce] How to reference angularjs template files within a visualforce page

I do alot of salesforce angular work.

I take it you're using a Router of some sort, be it the built in $router or Ui-Router.

Regardless of which one you use, when you're given a choice to include a template via url do this:

{
  templateURL: '/apex/NameOfTemplateVFPage'
}

In your template partial, make sure to turn the sidebar, headers, and standard css OFF. And set the doctype to html-5.0

Lastly, if you're utilizing ngForce (shameless plug) when the lawyers get done pissing at each other, there will be an update that enables you to strip off the excess JS that Salesforce inserts into all vf pages when you're loading partials.

Best Answer

Related Solutions

[SalesForce] Dynamically displaying, adding, and deleting attachments from email template before sending email

[SalesForce] How to reference angularjs template files within a visualforce page

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