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westerdaled
Continued Contributor
Continued Contributor

How to reset a choice control in a model driven form

 

In a tab / section I have placed a number of choice controls. Each control has a custom option set which is similar to:  Yes/ No but allows for additional options is the future.

 

 

westerdaled_0-1706612760159.png

 

So what if I want ensure each control goes back to an initial state say if the user changes their mind or changes tabs.

 

The intial value is -1 

 

 

 if  (control.getControlType() === "optionset") 
       {
         // Type-cast the control to OptionSetControl
         let optionSetControl = control as Xrm.Controls.OptionSetControl;

         // now get the controls original value
         let resetOptionValue = optionSetControl.getAttribute().getInitialValue();
         
           // convert to type Number | null not NUmber | undefined
         let newValue: number | null = resetOptionValue ;
         // set the original value and fire the on change event
         optionSetControl.getAttribute().setValue(newValue);
         optionSetControl.getAttribute().fireOnChange();
     }

 

 

Unfortunately, my code snippet does not work as as I can't got back an retrospectively set this value: -1   😓   . I have casted correctly?

westerdaled_1-1706613700901.png

 

So is the only option to add to my option set my own "Not Valid Option" ( text and value)?

 

1 ACCEPTED SOLUTION

Accepted Solutions
ivan_apps
Memorable Member
Memorable Member

How do you have your optionset column defined? Do you literally have 'no' set to the value of '-1' and 'yes' to '1'? Normally optionset values are defined for you by your publisher's prefix value and 9 digits long... and can't be negative numbers. You can modify the number to whatever you want, but you can't go negative.

 

A negative number would likely mean a null value / error selection if that's what's coming back. Otherwise you might have a non-optionset value that you're incorrectly trying to get the default value of because .setValue(null) has worked for me for clearing optionsets.

 

ivan_25_0-1706649511687.png

 

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5 REPLIES 5
bscarlavai33
Advocate I
Advocate I

Try just setting it to nothing

optionSetControl.getAttribute().setValue()
westerdaled
Continued Contributor
Continued Contributor

@bscarlavai33

 

Thanks for responding. 

Unfortunately, setValue() needs either a number or null.  I am wrting this code in Typescript which isn't forgiving lol.

      optionSetControl.getAttribute().setValue(null);

This also doesn't work but gives an odd error :

 

      my_form.js:295 Uncaught (in promise) TypeError: Cannot set properties of null (setting 'text')

 

ivan_apps
Memorable Member
Memorable Member

How do you have your optionset column defined? Do you literally have 'no' set to the value of '-1' and 'yes' to '1'? Normally optionset values are defined for you by your publisher's prefix value and 9 digits long... and can't be negative numbers. You can modify the number to whatever you want, but you can't go negative.

 

A negative number would likely mean a null value / error selection if that's what's coming back. Otherwise you might have a non-optionset value that you're incorrectly trying to get the default value of because .setValue(null) has worked for me for clearing optionsets.

 

ivan_25_0-1706649511687.png

 

---------
If I helped you solve your issue, please mark it as a solution or give it a like!
westerdaled
Continued Contributor
Continued Contributor

Hi @ivan_apps 

 

I am not near my laptop atm but I seem to remember I used yes : 1 and No: 0.  What I was hoping to do with the script is reset to the initial unselected value (neither Yes or No) . I will look in the morning and change those values and report back. 

 

Update (31/01/2024):  here is my  current optionset 

westerdaled_0-1706692881456.png

 

So I change this to 

 

westerdaled_1-1706693692563.png

Rerun my resetFunction and I get the same error as shown above : Uncaught (in promise) TypeError: Cannot set properties of null (setting 'text').

 

 Ok, I thought I would change tack and introduce my own non valid option, since MS is definitely not allowing nulls:

westerdaled_2-1706694711158.png

The code below does work, just not that elegant 😑.

 

const UnselectedOptionValue = 3;
optionSetControl.getAttribute().setValue(UnselectedOptionValue);
optionSetControl.getAttribute().fireOnChange();  

 

 

 

 

 

westerdaled
Continued Contributor
Continued Contributor

@ivan_apps 

 

Just to let you know that you are 100% correct - seems my generic iterate all  through tab controls/attributes  does not work 100% . So will just need reset each attribute individually as shown below.  Hmmmmmm 

 

 

   let myOptionSetFieldLogicalName =  "my_field";
   let myOptionSetField = formContext.getAttribute<Xrm.Attributes.OptionSetAttribute> (myOptionSetFieldLogicalName );
   myOptionSetField.setValue(null); // happy days, as no exception and no need to have an "Unselected option.

 

 

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