if (!$this->Page->IsPostBack && !$this->Page->IsCallBack)
{
// do it here
}

That is why when I submitted another TDropDownList on the page it fired the function described above, which lead to a page reload. Silly …

Ok perhaps you are wondering why the title of the post is about page state – I just want to express my opinion on the page state idea which was reminded o me by this problem. I really find it helpful in programming, it is borrowed from ASP.NET and yes it has some problems when it has to hold a lot of that – mainly performance. But on the other hand it can save a lot of database queries – as the situation above – a db query to fill the dropdown after postback. Another very good usage is holding private variables on which the programmer can rely on that cannot be modified by the end user and this is due to its encryption.

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Here is the code:

$doc = new TXmlDocument();
$doc->loadFromString('
  <module id="db1">
  <database ConnectionString="mysql:host=localhost;dbname=dbdb" Username="dbdb" Password="dbdb" />
  </module>
');
Prado::using('System.Data.TDataSourceConfig');
$db = new TDataSourceConfig();
$this->Application->setModule('db1',$db);
$db->init($doc);

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<?php
/**
 * MTHtmlArea class file.
 *
 * @author Georgi Budinov <georgi[at]budinov[dot]com>
 * @link http://georgi.budinov.com/
 *
 * MTHtmlArea class
 *
 * Enables the embed and object tag in order post embeded videos from YouTube for example still using the safe text property
 */

//Includes THtmlArea class
Prado::using('System.Web.UI.WebControls.THtmlArea');
class MTHtmlArea extends THtmlArea
{
 public function __construct()
 {
   parent::__construct();

   $ind = array_search('object', $this->SafeTextParser->deleteTags);
   if($ind >= 0)
   {
     unset($this->SafeTextParser->deleteTags[$ind]);
   }

   // remove the embed tag from the list if it is there
   $ind = array_search('embed', $this->SafeTextParser->deleteTags);
   if($ind >= 0)
   {
     unset($this->SafeTextParser->deleteTags[$ind]);
   }

   //reset the indexes
   $this->SafeTextParser->deleteTags = array_values($this->SafeTextParser->deleteTags);
 }
}
?>

You can use this class as the following example shows:

<com:MTHtmlArea ID="Test">
 <prop:Options>
   extended_valid_elements: "object[width|height],param[name|value],embed[src|type|allowscriptaccess|allowfullscreen|width|height]"
 </prop:Options>
</com:MTHtmlArea>

You have to add the extended_valid_elements option in order to allow the tinymce to accept these tags.
If you use one of the earlier versions of Prado it is not required.
Enjoy!

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So here is the problem: I had a long form full of controls and validators, but for one of the fields I needed to make  a javascript call to the confirm function. The reason was that we needed to ask the user if he/she wants to go ahead and leave a field blank or no. Ok that is fine but when having other fields and validators for them the confirm function should be called after all of them are validated ok on the client side. The onclick javascript event is called before the validation. That’s the problem. How did I solve it? Well  don’t like the solution but it seems to be the only one that I could figure out. Here it is:

• I put this on the top of tha page as javascript code:

var hasError = false;

function emailCheckValidator(sender, parameter)
{
  if(!hasError && $('<%= $this->Email->ClientID %>').getValue().toString().length==0 && !confirm('<%=LABEL_SURE_CONTINUE%>'))
  {
    return false;
  }
  else
  {
    return true;
  }
}

• On each validator I set up a client side validation error like this:

<prop:ClientSide.OnValidationError>
  hasError = true;
</prop:ClientSide.OnValidationError>

• Just before the link button I put the following:

<com:TTextBox
  ID="controlField"
  CssClass="text-field"
  Style="display: none;" />
<com:TCustomValidator
  ControlToValidate="controlField"
  ValidationGroup="SubmitGroup"
  ClientValidationFunction="emailCheckValidator"
  OnServerValidate="validateControlField"
  Text=""
  Display="Dynamic"
  FocusOnError="true" />

• On the TLinkButton added the onclick client cide event:

<com:TLinkButton
  ID="SubmitButton"
  ValidationGroup="SubmitGroup"
  OnClick="submitButtonClicked"
  Text="<%=LABEL_SAVE%>"
  Attributes.OnClick="hasError = false;" />

• And the last step set up the php custom validator function that is always returning true:

public function validateControlField($sender, $param)
{
  $param->IsValid = true;
}

That’s it. Prado is one very good framework. But I hate when i must write stuff like this. Have you a beter way to do it? Share it, please!

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