Event Handler - Reset Field

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Posted on by mykedeabreu

Hi All,

I am a couple weeks old in Model Driven apps using the CDS/Dataverse but learning quickly. I have a "Country" field and a "State/Province" field. I am trying to reset the "Province/State" field if the country field is changed.

I know this should be an "OnChange" event I am just not sure how this works and do not have any JS coding background. Can anyone direct me on how I can do this now and with future fields please?

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mykedeabreu 99 on at

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RE: Event Handler - Reset Field

Hi Mehdi,

This is working great for me thanks. Just one question - Can I add multiple fields? I tried adding multiple fields using comma but doesnt seem to work.
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meelamri 13,212 User Group Leader on at

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RE: Event Handler - Reset Field

Hi mykedeabreu,

Yes, you need to create your library. Generally, it is better to create one library per entity. Could you share screenshots for each of the steps you described in your last post.A screenshot of the error will help you to solve the problem.

Please note that you should always use the technical fields names when developing your JavaScript code.

resetField function will clear the field address1_stateorprovince

I'll be happy to help you implement your JS code to the end
mykedeabreu 99 on at

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RE: Event Handler - Reset Field

I have my "State" field visible set to false if Country is not populated. When I disable this business rule your method works. If I enable the business rule I cannot see the State field at all.
mykedeabreu 99 on at

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RE: Event Handler - Reset Field

Does it make a difference if the field I am resetting is a lookup field?

I get:

This is my Library Code:

This is my Handler properties:
mykedeabreu 99 on at

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RE: Event Handler - Reset Field

Hi Mehdi - Thank you for your help on this. I just want to clarify if I did this right as it is giving me an error now on the form.

Open Events Tab on Country Field

Do I create a New Library or is this something that will already exist?

I did not find it so I did create my own library using the exact code you provided and made no changes.

Add OnChange Event Handler Function: resetField

Check "Pass execution context as first parameter"

"State" as that is my column name.
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meelamri 13,212 User Group Leader on at

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RE: Event Handler - Reset Field

Hi,

Please refer to the code below:

function resetField(executionContext, fieldName){ var formContext = executionContext.getFormContext(); formContext.getAttribute(fieldName).setValue(null); }

Event Handler:

Handler Properties

Feel free to ask questions about my code. It works without any problem.