Need Help in Solving the Error

Help Studio
, ,
1

Hi
I am using C# and I am facing issue in simple string manipulation.

The below code shows error as:

An expression tree may not contain a call or invocation that uses optional arguments

string msg=“UiPath, RPA, Robotics”
string output=msg.Split(‘,’)

image
image966×292 19 KB

This does not makes sense as the same code works fine when you write the same in any other C# editor.

I know i can simply write any of the below and it will work but why the above is not working? Any suggestions?

string output=msg.Split()
or
string output=msg.Split(‘,’,StringSplitOptions.None)

Thanks

1 Like
2

Hey @Lokesh_Chandra

Split function cannot accept a single character instead a char array or with additional arguments.

Thanks
#nK

3

So going by your suggestion only I ran the my code here: String.Split Method (System) | Microsoft Learn

I get the expected result.

image
image1920×848 67.2 KB

But the same approach does not work in UiPath.

4

give a try at
msg.Split(',');

as ’ is indicating that the split char is to interpret as a char

when the trimmed values are to return:
msg.Split(',').Select(x => x.Trim()).ToArray();

5

Hello,

The variableName.Split method is kind of bugged in some cases.

Instead of using variableName.Split(delimiter), use the following: Split(variableName, delimiter)

This will always work without errors.

6

Hello Laurentiu_Mihai
with VB your solution works but with C# it didn’t work for me (it’s more that method I can’t call it in an assing) so I recommend that if you have a phrase that you want to separate by a string you have to use yes or yes StringSplitOptions.RemoveEmptyEntries option in such a way that when using this formula it will remove the empty entries and it will work without problem using “,” as String.
If you don’t have to transform the separator to type char.
Main.xaml (8.7 KB)
project.json (1.5 KB)

7

we crosschecked within the immediate panel and it was working:
grafik

we checked within assign which also was working:

grafik
grafik874×452 68.7 KB

Any differences in your end-specific modeling?

8

Still the same problem.

image
image1449×789 61.6 KB

1 Like
9

can you share your XAML with us, if possible

Also let us know:

  • UiPath Studio Version
  • Selected Targetframework
  • Version Of UiPath.System.Activities Package

Thanks

Also give a try at this variation:
YourStringVar.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

3 Likes
10

You have to put the option settings like StringSplitOptions.RemoveEmptyEntries

1 Like
11

Thank you so much , it helped me .

1 Like
13

Could you give me more information?

14

@Manchu you have to close the question before and open a new case with the floating robot.
Thank you