Programmatically register On-change Event handler (for a form) in Dynamics CRM?

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Posted on by Ramakanta

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I have added a script as a Form Library. It contains code(funtion) that needs to be executed on field change event.I don't want to register it manually,all i want to do using Programmatically i.e. by updating the formxml, is any one having the sample code(C#)/link which describes for the same

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Community Member on at

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Hi,

you could simply register it in your Javascript file: msdn.microsoft.com/.../gg334409.aspx

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Ramakanta 2,715 on at

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Thanks Guillaume for quick response,i don't want to register OnLoad event in order to add the OnChange event ,my intention is to register the function on OnChange of my target field

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ashlega 34,477 on at

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If you are ok at least adding that web resource to the form, you can do something like this in your script:

RegisterEvents();

function RegisterEvents()

{

   if(typeof Xrm == 'undefined' || Xrm == null) setTimeout(function(){ RegisterEvents(); }, 200);

   else{

      Xrm.Page.getAttribute(arg).addOnChange(...);

   }

}

If you don't want to even add that web resource to the form manually, you'll have to update form Xml I believe:

https://community.dynamics.com/crm/b/journeyintocrm/archive/2016/01/06/hardcore-crm-using-c-to-modify-an-entity-forms

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Ramakanta 2,715 on at

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Thanks Alex for quick response,My requirement is to Add JS Library into the FORM(which i have already done) and now i am looking to register my function on OnChange Event.Now i will try your suggestion ...

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Ramakanta 2,715 on at

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Hi Alex,

I had added the FormLibrary ,now i am trying to register a function which is present inside the library on OnChange of an attribute,i had followed your suggestion but unfortunately my onchange event is not triggering,i am trying in Lead Form,below is the code that i have used,is there anything i am missing?

function test()
{
debugger;
RegisterEvents();
}
function RegisterEvents()
{
debugger;
if (typeof Xrm == 'undefined' || Xrm == null) setTimeout(function () { RegisterEvents(); }, 200);
else
{
Xrm.Page.getAttribute("subject").addOnChange(test1);
// Xrm.Page.getControl("subject").getAttribute().addOnChange(test1);
}
}
function test1()
{
alert("calling");
}

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RaviKashyap 55,410 Moderator on at

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Hi RK,

Try this code, paste it as-is in your web resource. This is same as Alex suggested above.

===================

function RegisterEvents()

{

debugger;

if (typeof Xrm == 'undefined' || Xrm == null) setTimeout(function () { RegisterEvents(); }, 200);

else

{

Xrm.Page.getAttribute("subject").addOnChange(test1);

// Xrm.Page.getControl("subject").getAttribute().addOnChange(test1);

}

}

function test1()

{

alert("calling");

}

RegisterEvents();

============================

Hope this helps

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Ramakanta 2,715 on at

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Thanks Ravi,It works as expected.I also find out that we can achieve it by using Self-Invoking function.Can you please suggest ,what will be the best option in my scenario

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RaviKashyap 55,410 Moderator on at

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Hi RK,

I am not sure about self invoking functions. From where you got this term?

Are you referring to to attaching the method to field on change directly?

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Ramakanta 2,715 on at

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Here is the link crmdynamicsblog.wordpress.com/.../add-form-library-on-crm-form-using-c-or-javascript

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