Should we use String.format or String.replace in C#?

Question

we are trying to create a app that shows the user messages. Here are some example messages:

• "You have an offer for {PlayerName} from {Offerclub}. They would pay {Offer}".
• "{Offerclub} would like to buy {Playername} for {Offer}".

We are getting these strings from our database. (Our first attempt was to make a class, with different functions, that gave us back the strings. We used string interpolation. Then we realized that this is no good option, because the users can't create contents/strings by themselves and we have to update our app every time we create a few more strings in this class.)

The options we know:

1. String.format: something like that:

   string result = string.Format("{1} blalbal...- {2}blabla... {3}", value1, value2, value3);

The problem here: We want to use strings with different positions of the input like in our examples. Sometimes the first one is the playername, sometimes it is the clubname...

2. String.replace: We thought about fixed placeholder names and would then use replace to make our changes.
3. String Builder: We thought to simply concenate our strings. We would first read them from the database and use String.split to create an array of the strings.

Questions:

• Are there better options? (We are talking about some messages. Maybe a few hundred messages in the worst case) We would prefer to use String.replace because it sounds like the easiest solution.

Answer 1

You can simply store the string format in the database, the order of the variables doesn't need to be consistent?

SQL Database

"You have an offer for {0} from {1}. They would pay {2}."
"{1} would like to buy {0} for {2}."

You could even leave out arguments if you wanted.

"{1} would like to buy {0}, they would like to discuss pricing."

c#

string format = GetStringFromDatabase(someIdentifier);
string message = String.Format(format, PlayerName, Offerclub, Offer);

Answer 2

There's a better and easy way to make those strings. You can try using this example:

string result = $"{value1} blalbal...- {value2}blabla... {value3}";

This "$" symbol allows you to insert the variables directly.