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Helper V
Helper V

Canvas form not showing error text / missing field details - Dataverse table

I have an edit form linked to a dataverse table in a Canvas App.

I have setup the submit button with the following 'On Select'
If(mainform.Valid, SubmitForm(mainform))

 

It works, by not doing anything if the form is not valid which is great, however I cannot seem to figure out why the error text is not displaying underneath fields...I have all set to mandatory in the DV table..

form.png

TLDR, Errors are not displaying to let the user know what they have missed.
Is there another step I need to follow for this to display?

Thank you

1 ACCEPTED SOLUTION

Accepted Solutions

I see, you are quite close, you just have to move some stuff around.

 

Just to confirm, you want positionError to say "full" if there is text, and "Empty" if there isn't?

Also, I'm assuming position is a text input here.

 

In this case, try this code, except in the "Text" Property of the label:

 

If(!IsBlank(position.Text), "Full", "Empty")

 

This, inside the text property of the error label, will change the text to be "Empty" when position is empty, and "Full" when it's not

 

Just for future reference, one key thing to remember when trying to update labels and other controls automatically - it generally can't be done outside of the controls defining property, without the use of variables or some other fiddling around. 

View solution in original post

8 REPLIES 8
madlad
Super User
Super User

For the errors to display, the form has to attempt to submit - since you've bypassed this, the form never actually throws any errors.

You could either remove the if function, and always attempt to submit the form(throwing the appropriate errors) or you could use some combination of checking these within the if statement, and perhaps variables to manually display these messages.

 

For this, you could check each data card's validity, and for each of them, set variables, something along the lines of:

Set(DataCard1Valid, *ThisDataCard*.Valid)

 with a unique variable being set for each datacard, and the error message being that data card's variable.

 

If you've any questions about specifics implementing these, I'm happy to provide more details  🙂

 

You can also see more details on error handling with these docs, which may be handy:

Powerapps OnError property 

Powerapps Error functions 

 

Hope this helps!

Champ thank you

I just had a thought, can it be done by setting the Text of the error message field to "My Message"

Then set the Displaymode of the error field to If (IsBlank(fieldname),DisplayMode=DisplayMode.Edit, DisplayMode.Disabled). 
Then I gotta figure out how to get it to update when a user clicks off the field...

It  can be done like that - and using IsBlank should stay updated live!

 

It is worth noting that using this, the message will display always until it's got text.

Also, in my opinion, it might be nicer to change the visibility as opposed to the display mode - all you'd need is something along the lines of this in the message's visible property:

IsBlank(*FieldName*.*Value*)

 

If you wanted it to display only when the submit button is pressed(more akin to a true 'Error Message'), you could set a true false variable when the button is pressed with

Set(ButtonPressed, true)

and then combine both of these, something like:

IsBlank(*FieldName*.*Value*) && ButtonPressed

 

Just as a side note, if these have solved your issue, if you could mark as solution so others can find these answers as well. 🙂

Thank you, Almost there 🙂
Trying to use the Visible property of the error text field.

I wasn't sure what the 'Value' in 

IsBlank(*FieldName*.*Value*)

should be.

Be nice if I could toggle directly like Displaymode.Edit,Display,mode.Disabled
Is there something like this?

If (IsBlank(Inputfield),Visible.true,Visible.false)

 

Thanks again

What I meant by this, is the inputted control's value - for example, if you had a text input(named TextInput) to input data with on a card, you could use 

 

 

IsBlank(TextInput.Text)

 

 

likewise a card with a dropdown could use DropdownName.Selected - every input control has a property which returns the value stored in it currently.

Putting this in the "Visible" property of the error message will toggle the error's visibility almost instantly - no external formula will impact it really, all you need is a function which returns true or false here.

 

Let me know if you need any more details about this! 🙂

Thanks again,
So close, I can feel it.

close.png

I cut off the main input field name 'position'
The code is in the positionError Visible property.
At the moment, nothing is displayed regardless of the position input field being empty of containing text.

I see, you are quite close, you just have to move some stuff around.

 

Just to confirm, you want positionError to say "full" if there is text, and "Empty" if there isn't?

Also, I'm assuming position is a text input here.

 

In this case, try this code, except in the "Text" Property of the label:

 

If(!IsBlank(position.Text), "Full", "Empty")

 

This, inside the text property of the error label, will change the text to be "Empty" when position is empty, and "Full" when it's not

 

Just for future reference, one key thing to remember when trying to update labels and other controls automatically - it generally can't be done outside of the controls defining property, without the use of variables or some other fiddling around. 

Champion, that's got it.

 

Thank you so much!

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