String Interpolation With Variable Content in C#

by

I guess that these strings will have always the same number of parameters, even if they can change. For example, today template is "Hi {name}", and tomorrow could be "Hello {name}".

Short answer: No, you cannot do what you have proposed.

Alternative 1: use the string.Format method.

You can store in your database something like this:

"Hi {0}"

Then, when you retrieve the string template from the db, you can write:

var template = "Hi {0}"; //retrieved from db
var name = "Joe";
var result = string.Format(template, name);
//now result is "Hi Joe"

With 2 parameters:

var name2a = "Mike";
var name2b = "John";
var template2 = "Hi {0} and {1}!"; //retrieved from db
var result2 = string.Format(template2, name2a, name2b);
//now result2 is "Hi Mike and John!"

Alternative 2: use a placeholder.

You can store in your database something like this:

"Hi {name}"

Then, when you retrieve the string template from the db, you can write:

var template = "Hi {name}"; //retrieved from db
var name = "Joe";
var result = template.Replace("{name}", name);
//now result is "Hi Joe"

With 3 parameters:

var name2a = "Mike";
var name2b = "John";
var template2 = "Hi {name2a} and {name2b}!"; //retrieved from db
var result2 = template2
    .Replace("{name2a}", name2a)
    .Replace("{name2b}", name2b);
//now result2 is "Hi Mike and John!"

Pay attention at which token you choose for your placeholders. Here I used surrounding curly brackets {}. You should find something that is unlikely to cause collisions with the rest of your text. And that depends entirely on your context.

More Related Contents:

  1. What is the difference between String and string in C#?
  2. save data from 2 forms and show it in a 3rd form c# [closed]
  3. Do event handlers stop garbage collection from occurring?
  4. How do I pass a value from a child back to the parent form?
  5. Finding the default application for opening a particular file type on Windows
  6. ServiceStack Request DTO design
  7. .NET Out Of Memory Exception – Used 1.3GB but have 16GB installed
  8. format date in c#
  9. Splitting a string / number every Nth Character / Number?
  10. With block equivalent in C#?
  11. Is String.Contains() faster than String.IndexOf()?
  12. How can I read user input from the console?
  13. Entity Framework/Linq EXpression converting from string to int
  14. Handling exceptions, is this a good way?
  15. what is relation between GC, Finalize() and Dispose?
  16. In C# what is the difference between ToUpper() and ToUpperInvariant()?
  17. What is the use for Task.FromResult in C#
  18. How to set conditional breakpoints in Visual Studio?
  19. Difference between Lookup() and Dictionary(Of list())
  20. How to convert an expression tree to a partial SQL query?
  21. .NET DefaultValue attribute
  22. Can I check if an email address exists using .net?
  23. Size of A Class (object) in .NET
  24. How do I resolve “Please make sure that the file is accessible and that it is a valid assembly or COM component”?
  25. BindingList.Sort() to behave like a List.Sort()
  26. How to use c# Dll in vc++?
  27. Does FileStream.Dispose close the file immediately?
  28. How can I use escape characters with string interpolation in C# 6?
  29. Process.Start(url) fails
  30. How to debug “Could not load file or assembly” runtime errors?

Leave a Comment