Microsoft Dynamics CRM 4 field level validation using javascript regular expression on client side handling the onChange event to validate and check the value and text of a CRM 4.0 field

Please note that this post is aimed as showing how to use javascript regular expression field level validation in Microsoft Dynamics CRM. The post does not focus on the many ways of getting a regular expression. The example regular expression below is used for explanation only.

If you want to create validation at field level in Microsoft Dynamics CRM 4 to check the input value and text of a CRM field in an entity form, you can do this using regular expressions written in javascript code that handles the on change (onChange) event of this field at client side.

Below is an example of a regular expression but you might want to use your own regex value or search online for almost unlimited number of regular expressions that do just about anything.

For example, if you want to validate a CRM 4 field so that only a 4 digit year value starting from year 1980 is entered in the field text box, follow the following steps:

– Open the entity customisation form
– select the field you want to validate using javascript regular expression.
– Click on field properties, events tab and then open the onChange event.
– In the onChange event type the following javascript code (script) to handle the event and implement the field level validation:

//Regular expression ensuring a 4 digit year value is input starting from year 1980.
var reDate =/^(([1]{1}[9]{1}[8-9]{1}\d{1})|([2-9]{1}\d{3}))$/
//Check if the input value satisfies the regular expression condition
if (
{//if match failed
alert("Please enter a valid year value. Year value must be four digits starting from the year 1980")
crmForm.all.new_yearfieldname.value = '';

Another way of doing this is as follows;

var regexS = "^(([1]{1}[9]{1}[8-9]{1}\d{1})|([2-9]{1}\d{3}))$"; 
var regex = new RegExp( regexS ); 
var results = regex.exec( crmForm.all.new_yearfieldname.value);
if( results == null )   
{//if match failed
alert("Please enter a valid year value. Year value must be four digits starting from the year 1980")
crmForm.all.new_yearfieldname.value = '';

Hope this helps.

Ajax Update progress screen to block access to form during background server side processes

If you are writing an Ajax based .NET web application or web page, there are situations were you might want to block the whole webpage from being accessed while a background or server side process is taking place. So for example if the user clicks submit, you want to make the web page not accessible until the backend server side event handler function finishes and reloads the page.

To do this, you need to do the following:

In the button click event, call the javascript function showprogress (client side – aspx page code):

<asp:Button ID="ApplyFilterButton" runat="server" OnClick="ApplyFilterButton_Click"
OnClientClick="if(Page_ClientValidate())ShowProgress();" Text="Apply Filter"
CssClass="ms-crm-Button" Style="height: 23px" />

The show progress function should look something like the following:

<script type="text/javascript">
   function ShowProgress() {
document.getElementById('<% Response.Write(PageUpdateProgress.ClientID); %>').style.display = "inline";

 The update progress control should look something like this:

<asp:UpdateProgress ID="PageUpdateProgress" runat="server"
AssociatedUpdatePanelID="PageHiddenPanel" DisplayAfter="50">
     <div id="progressDiv"
     style="background-position: center center;
     background-image: url(../../Images/progress.gif);
     background-repeat: no-repeat; background-attachment: fixed;
     vertical-align: middle; background-color: #000;
     filter: alpha(opacity=50);">
            <script type="text/javascript">
                var targetDiv = document.getElementById("progressDiv");
       = 0;
       = 0;
       = screen.availHeight;
       = screen.availWidth;

 Hope it helps.