Unanswered

multiple expressions and variable condition in Canvas App

(0) Share

Report

Posted on by bravoss

I have a chain of expressions on a button click event where I keep updating the context variable errorMsg and at the end check to see if the variable is empty(IsEmpty/IsBlank) to do one thing or do another. For some reason it always appears to be finding variable errorMsg to be empty. I am assuming that this is probably due to this being evaluated before the previous expressions are executed. Is this understanding correct ? And how do I overcome this.

Categories:

Building Power Apps

I have the same question (0)

All responses (4)

Answers (0)

Sort by

eka24 20,925 on at

Like (0)

Report
Copy link

Link copied!

Please can you show your expression.
Check out difference in IsEmpty/Isblank
https://powerusers.microsoft.com/t5/Building-Power-Apps/IsBlank-IsEmpty-or-quot-quot/td-p/180395

If you like this reply, please give kudos. And if this solves your problem, please accept this reply as the solution

Was this reply helpful? Yes No
bravoss 26 on at

Like (0)

Report
Copy link

Link copied!

Here is a snippet of the expression that I use
UpdateContext({
varErrorMsg:
If(IsBlank(DataCardValue2.Selected.Value),Concatenate(varErrorMsg,"Error: 1"),Concatenate(varErrorMsg,""))
});
UpdateContext({
varErrorMsg:
If(!IsBlank(DataCardValue12)&&IsBlank(DataCardValue15),Concatenate(varErrorMsg,Char(13),"Error: 2."),Concatenate(varErrorMsg,""))
});
UpdateContext({
varErrorMsg:
If(DateDiff(DateTimeValue(Text([@ModelDrivenFormIntegration].Item.'End Date',DateTimeFormat.ShortDate) ),(DataCardValue12.SelectedDate))>0,Concatenate(varErrorMsg,Char(13),"Error: 3."),Concatenate(varErrorMsg,""))
});
SubmitForm(Form1);
If ((IsEmpty(varErrorMsg)) ,
Navigate(SCR_1) ,
Navigate(SCR_2)
);

Note: IsEmpty/IsBlank have both been tried by me.

Was this reply helpful? Yes No
WarrenBelz 155,565 Most Valuable Professional on at

Like (0)

Report
Copy link

Link copied!

Hi @bravoperss ,
Can you please use Format Text on this code and post in a box (</> icon at end of first row above) and I will have a look at it for you.

Was this reply helpful? Yes No
bravoss 26 on at

Like (0)

Report
Copy link

Link copied!

Thanks for the reply. The above now appears to be working for me. I am not sure what resolved it if it was an issue with the expression or clearing of variables, but it now works fine.

Was this reply helpful? Yes No