Force number of characters in argument

Help Studio
,
1

Is there a way to force the number of characters that an argument of a custom activity will accept?

When we try to send an argument value that’s the wrong type to an activity, we’re informed of it right away (for example, a string when the argument is set up as an integer) - Studio won’t even let us make that mistake. Is there a way to force number of characters too?

Sure, I can create error catching within the activity that will throw an error if a wrong number of characters is sent but I was wondering if there’s a way to prevent that before it even gets there.

2

so, we assume it is talked about coding in Visual Studio

We would recommend to check the option if Validations can be defined by using Annotations

like:

[Required]
[StringLength(4, ErrorMessage = "PCode value cannot exceed 4 characters. ")] 
public string PCode { get; set; }
3

But still we should keep in mind that validation also requires action. Also not every value is hardcoded and therefore the validation can in such a case only work on runtime and check

4

I meant custom activities saved within a custom library.
When referencing those activities outside of the library, we can see what arguments are required. I can set up a tooltip as help, but that’s about it.

For example, there’s one argument that no matter what, it has to be a four characters long. I was wondering if I could warn the user that they entered an invalid argument into that activity before they even run the process - to stop the compiler and give them a system-generated red exclamation mark as soon as they enter it - much in the same way that Studio warns us if we input a string where it wants an integer.

5

we adressed with:

with the info:

No, such validations are not available

we also refer to docu:

6

That’s a good point.

I was just wondering if it was an existing feature that would save time - force you to debug before you even run it.

For example, this variable is Int32. I try to send a string to it and immediately get notified that I’m doing an oopsie.

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It would be cool if we could set up the same type of immediate validation for number of characters (or for even more interesting parsing - imagine the possibilities).

7

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