VB.net string split get the first value - vb.net

Question

I am working with a string that will always have "Product 1:"
in it. I want to get the value of what comes after "product 1:". Here are some example of the string
Hello UserName Product 1: Alcatel Product 2: Samsung Truck: Fedex
Ending: Canada
Hello UserName Product 1: NOKIA Truck: Fedex Ending: Canada
Hello UserName Product 1: Alcatel Product 2: Samsung Product 3: NOKIA
Truck: Canada POST Ending: Brazil
Hello UserName Product 1: Alcatel-55 Special Product 2: Samsung
Product 3: NOKIA Truck: Canada POST Ending: Brazil
Hello UserName Product 1: Samsung Galaxy S6-33 Truck: Canada POST
Ending: Brazil
The string I am looking for:
Alcatel
NOKIA
Alcatel
Alcatel-55
Samsung Galaxy S6-33
I was having a little bit of luck with
sMessage.Split("Product 1:")(1).Split(":")(1)
But with above code I still get
Alcatel
NOKIA Truck
Alcatel
Alcatel-55
Samsung Galaxy S6-33 Truck

Answer 1

You could replace the undesired values with:
sMessage.Split("Product 1:")(1).Split(":")(1).Replace(" Truck", "")
You can also match the desired string with regular expressions:
(?<=Product 1: )((.*)(?= Product 2:)|(.*)(?= Truck:))
Example:
Dim regex As Regex = New Regex("(?<=Product 1: )((.*)(?= Product 2:)|(.*)(?= Truck:))")
Dim match As Match = regex.Match("Hello UserName Product 1: NOKIA Truck: Fedex Ending: Canada")
Note that if there are more delimiters than Product x and Truck you want to remove then you need to add those to the regular expression (or replace).
Edit
Updated the regular expression to be more generic in regards of delimiter words:
(?<=Product 1: )((.*)(?= Product 2:)|(.*?)(?= \w+:)|.*)
Now it will match on Product 2: or any other, or no delimiter.
Edit 2
More simplifications:
(?<=Product 1: )((.*?)(?= \w+ ?(\d+)?:)|.*)
This last regular expression also matches correctly if there is a delimiter with multiple digits like Products 123:.

Answer 2

This assumes you want the value between "Product 1:" and whatever the next "tag" happens to be, which in some cases is "Product 2:" and in other cases is "Truck:". Keep in mind that this is based only on the sample you provided - if you have other "tags" which can appear after the "Product 1:", you'll need to adjust.
The following regex will get you almost what you asked for
(?:Product 1:)(?<product>.+?)(?=(\sProduct 2:)|(\sTruck:))
Using that regex, and given your sample text, you will get capture groups named "product" as follows:
Alcatel
NOKIA
Alcatel
Alcatel-55 Special
Samsung Galaxy S6-33