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Anonymous
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Change bound field value

Hey Guys!

Maybe i'm just to unexperienced to solve this issue but in the documentation of Manifest schema reference on https://docs.microsoft.com/en-us/powerapps/developer/component-framework/manifest-schema-reference/p... it says that bound properties can be changed. To be precise it says: "an entity attribute that the component can change (bound) or read-only values (input)".

So from my understanding it should be possible and intendened to update the value of a CRM field that has a custom control on top of it.

I created a custom control for a two option set. Instead of the normal Yes/No thing it should show a star image. This star turns yellow for true and white for false.

So far I got everything working BUT my problem is, that even when I execute 

this._context.parameters.<parameterName>.raw = true; the underlying field does not get changed.
I am googling my *** of for two days now but I only find solutions where the creator uses Xrm.Page.getAttribute().setValue() to archieve this but I don't want to use this because Xrm.Page will be deprecated at some point in the near future. I tried to implement the formContext in my script but I dont get the executionContext in my index.ts so it seems this is also not an option.
 
If this is the inteneded behavior for custom controls i find it very weak because from my understanding it should be logical to easily change the value of the underlying field with simply changing the value of the bound parameter.
I could post some code if necessary, but maybe someone already understands my problem and can point me in the right direction.
 
Thanks in advance,
 
greetings from Germany
1 ACCEPTED SOLUTION

Accepted Solutions
RAWilson
Resolver II
Resolver II

Just setting the value of the parameter is not enough to cause the change.  You will see that in the init function there is a notifyOutputChanged function that is passed.  This is what needs to be called when you want to update the underlying field.

 

I recently created a DropDown list for Booleans to overcome a specific issues I was having where setting Booleans to the List option was not populating them as such in Business Process Flow Forms.  This should provide you with a good example of what you are trying to do. https://github.com/rwilson504/PCFControls/tree/master/BooleanOptionset/BooleanOptionset

 

You can see below that I am first creating a private variable to hold the notifyOutputChanged event so that I can later use it in the OnChange event of a DropDown list.  I'm also creating a private variable _value to hold the final value I want to pass to the underlying field for the control.

 

OnChange1.png

 

Next in the OnChange event of the DropDown I am setting my local _value to the final value I want to pass to the field and then calling the nofityOutputChanged event.  This will call the getOutput function which is a base function of PCF functions.  The getOutput function will actually push the value to the underlying field.

 

OnChange2.png

Here is the getOutput function that finally pushes the value to the field.  inputValue is the bound value in my ControlManifest.Input.xml.

 

OnChange3.png

 

 

--Rick

 

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5 REPLIES 5
OOlashyn
Most Valuable Professional
Most Valuable Professional

Hi @Anonymous ,

 

You cannot directly change bound attribute. You need to define method called getOutputs (see official docs) for the system to understand how to retrieve new value for bound attribute. When you want the system to know that you changed the value you need to call method notifyOutputChanged that is passed to you as one of the parameters in the init function. You can check out real life examples for this in a component build by Tanguy Touzard here.

 

 

----------------------------------------------------
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RAWilson
Resolver II
Resolver II

Just setting the value of the parameter is not enough to cause the change.  You will see that in the init function there is a notifyOutputChanged function that is passed.  This is what needs to be called when you want to update the underlying field.

 

I recently created a DropDown list for Booleans to overcome a specific issues I was having where setting Booleans to the List option was not populating them as such in Business Process Flow Forms.  This should provide you with a good example of what you are trying to do. https://github.com/rwilson504/PCFControls/tree/master/BooleanOptionset/BooleanOptionset

 

You can see below that I am first creating a private variable to hold the notifyOutputChanged event so that I can later use it in the OnChange event of a DropDown list.  I'm also creating a private variable _value to hold the final value I want to pass to the underlying field for the control.

 

OnChange1.png

 

Next in the OnChange event of the DropDown I am setting my local _value to the final value I want to pass to the field and then calling the nofityOutputChanged event.  This will call the getOutput function which is a base function of PCF functions.  The getOutput function will actually push the value to the underlying field.

 

OnChange2.png

Here is the getOutput function that finally pushes the value to the field.  inputValue is the bound value in my ControlManifest.Input.xml.

 

OnChange3.png

 

 

--Rick

 

Hi @RAWilson Spot on!!

I can understand the architect but my problem is I have two bound properties..i am written pcf to select multiple contacts and added it as Bound properties but I want to select child contact associatted with the account with the help of PCF. So, defined a new bound properties for account in manifest so that I can get the current ID of account( it's an another field on form and pcf is not registered on this) .Now, I am confused How to add the notifyoutput change for it as it is already added for contact bound in the exactly same manner you defined..so whenever I am changing the contact it is notifying the notifyoutput function..

How Can I append it for Account (id) also so that whenever I change the account ,it triggers it and I get the current ID..

Thanks in advance.

--

It's difficult to understand what your problem is. Can you be a little more clear?

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