问题
I am reading a text from an application using BluePrism. The text has the following structure (the number varies from case to case): "Please take note of your order reference: 525". I need to be able to extract the number from the text. Looking at the calculation stage, there is a replace function: replace(text, pattern, new-text). I want to use this function to replace all alphabetic characters in my text with an empty string to return only whatever is numeric. How can I input that in the pattern? So I want something like this:
Replace([Order confirmation text ], /^[A-z]+$/, " ")
Also, I tried to look for a proper documentation for the VBOs that are shipped with blueprism, but couldn't find any. Does anyone know where we can get documentations for blueprism functions?
回答1:
The Replace() function in calculate stage is the simplest possible one. It's not a regex one!
So, if the stirng is always in that format, then you can use:
Replace([Text],"Please take note of your order reference:","")
If the text is not always that standard, then you should rather use a regular expressions. To do that, you need to use an object, that will invoke a regex code.
In the standard blueprism objects, you can find:
Object: Utility - Strings C#
Action: Extract Regex Values
I think there is no Regex Replace action, by default, so if you'd like to, then you have to implement it. Below you can find a code that I am using:
Dim R as New Regex(Regex_Pattern, RegexOptions.SingleLine)
Dim M as Match = R.Match(Text)
replacement_result = R.Replace(Text,Regex_Pattern,replacement_string)
回答2:
Quick Answer if the pre text is constant use a Mid statement then this will take out the issue the other guy had with the right. i.e.
Mid("Please take note of your order reference: 525",42,6)
If you aim for a maximum number length it will stop at the end anyway.
回答3:
A few things here:
-Your pattern isn't matching because it's looking for a constant string of letters from start to finish (^ anchors to the beginning of the string and $ anchors to the end).
-You're replacing the pattern with a space, not an empty string, so you'll end up with a bunch of spaces in your result even if you correct the pattern.
-You said you only want to replace alphabetic characters, but it looks like you also want to get rid of spaces and colons.
Try replacing [A-Za-z :]+ with "".
回答4:
Your goal is to retrieve number from string then use Right():
Right("Please take note of your order reference: 525", 3)
This will return only numeric.
Regards Vimal
来源：https://stackoverflow.com/questions/47336549/blueprism-how-to-use-the-replace-function-in-a-calculation-stage