I have a text file from which I need to extract a block of text after the last instance of a specific string. To better ilustrate what is needed:
SpecificString#1:
TextBlock#1
SpecificString#2:
TextBlock#2
...
SpecificString#5:
TextBlock#5
All specific strings are identical, and the number of instances can vary. So far I am able to extract all TextBlocks after the first instance of the specific string with the following code:
const string separator = "SpecificString";
var separatorIndex = myTextFileString.IndexOf(separator, StringComparison.CurrentCultureIgnoreCase);
var requiredTextBlock = myTextFileString.Substring(separatorIndex + separator.Length);
However I would like to grab only the last block of text (TextBlock#5 in this case). How can I achieve this?
You can get the last index of the separator in C# by using String.LastIndexOf() method. Please take a look at https://docs.microsoft.com/en-us/dotnet/api/system.string.lastindexof?view=netframework-4.8.
Once you know the last index, you can follow the same step as you have mentioned above to extract the text block after it.
Thanks, worked like a charm!