Double.TryParse is always returning 0 in the output variable

Help
1

Hi,
I am currently working on the framework demo application and I am facing the below issue.
Double.TryParse(CashIn, dbl_CashIn) provides me the correct output i.e. true/ false but it does not update the dbl_CashIn variable and always return 0. I don’t know why byref is not working.

DoubleTryParse
DoubleTryParse1070×853 80.4 KB

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2

Hi,
The out parameter can not be specified in the assign activity.
In this case we will use the Invoke method.

image
image710×535 20.3 KB

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3

Hi,
I did the above because it was passing the if condition i.e. all the values are double but as the dbl_CashIn was always 0 the second condition was always true i.e. less then 100

DoubleTryParse
DoubleTryParse1920×1045 171 KB

4

hi, ashish
In the assign activity, the value of dbl_CashIn variable is not set in the TryParse method,
so the initial value of 0.0 is applied.
Therefore, it seems that the second condition is always determined to be true.

5

Hi Kawata,

I have added a new sequence activity to convert the value to double using invoke method as you suggested and now its working.
I think this step should be added to the framework walkthrough pdf document.
Another issue which I found out is that application which was provide by uipath does not allow decimal i.e. dot to be inserted inside the textboxes and due to which incorrect values are getting inserted.
Thank you for you earlier reply.

UipathApp
UipathApp612×625 42.5 KB

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6

Hi ashish, can you share the invoke code that you have used here, thanks.

7

hey ashish can you help with this code

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Hi @armamidwar, please find it below:

Invoke%20method%20activity
Invoke%20method%20activity888×653 16.7 KB

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where “parsed” is the Result of InvokeMethod Activity

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Invoke%20method%20activity
Invoke%20method%20activity1454×663 36.6 KB

Screenshot along with Properties window and Input/output arguments.

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Why would we need a Invoke method activity? Can we assign dbl_CashIn with Convert.ToDouble and use the variable? Any drawbacks in doing so??

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Hi @haravallabhan

This should work without an issue. There are always multiple approaches :slight_smile:

1 Like
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Hi Guys I am not from Java or VB background hence do not know what does “Double.TryParse” do? I faced the same issue using double try parse and hence used invoke method as suggested in the above messages, even then i am able to get the converted dbl variables for CashIn and OnUsCheck but it doesnt convert the “NotOnUsCheck” …what could be the issue can someone help.

So basically i am seeking for two answeres -

  1. what does double try parse do exactly
  2. why NotOnUsCheck is not converted to double

Thanks.

14

Similar to @haravallabhan 's question, how does one tell when you need to use invokeMethod for something e.g. would it be …
it is ok to get the boolean result from TryParse without invokeMethod as that is the output of the function, but if the function has a variable as an argument, you must always use invokeMethod if you want the result to be put in that variable? (is it that simple, hopefully :blush:?)

15

Hi Ashish
I am also working on this same automation for practice and facing a few issues with argument import and variable, can you please share the JSON file so that I can have a look at it…
thanks