Insert variable values in the middle of a string

Question

In C   If I want to create a message like this   Hi We have these flights for you  Flight A B C D  Which one do you want   where just the section in bold is dynamic and I pass its value at run time  but its left and right parts are fixed  I can create something like LeftMessage   those variables   RightMessage  to create this  But I was wondering if there is a way of doing it all at once without the need to create two separate left and right messages   For translation purposes I am putting those left and right messages inside string resources so now I have two separate string resources  Is there a way to do it all at once

User · Answer

I would use a StringBuilder class for doing string manipulation as it will more efficient  being mutable   string flights    Flight A  B C D   StringBuilder message   new StringBuilder    message Append  Hi We have these flights for you      message Append flights   message Append     Which one do you want

User · Answer

You can use string Format  string template    quot Hi We have these flights for you   0   Which one do you want quot   string data    quot A  B  C  D quot   string message   string Format template  data    You should load template from your resource file and data is your runtime values  Be careful if you re translating to multiple languages  though  in some cases  you ll need different tokens  the  0   in different languages

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Use String Format  Pre C  6 0  string data    FlightA  B C D   var str   String Format  Hi We have these flights for you   0   Which one do you want    data     C  6 0 -- String Interpolation  string data    FlightA  B C D   var str     Hi We have these flights for you   data   Which one do you want      http   www informit com articles article aspx p 2422807

User · Answer

String Format  Hi We have these flights for you   0   Which one do you want                                 flights     EDIT  you can even save the  template  string separately  for instance you could store it in a configuration file and retrieve it from there   like this   string flights    Flight A  B C D    string template     Hi We have these flights for you   0   Which one do you want   Console WriteLine String Format template  flights      EDIT2  whoops  sorry I see that  DanPuzey had already suggested something very similar to my EDIT  but somewhat better

User · Answer

There s now  C  6  a more succinct way to do it  string interpolation  From another question s answer   In C  6 you can use string interpolation  string name    quot John quot   string result     quot Hello  name  quot    The syntax highlighting for this in Visual Studio makes it highly readable and all of the tokens are checked

User · Answer

1 You can use  string Replace method  var sample    testtesttesttest replace testtesttest   var result   sample Replace   replace    yourValue     2 You can also use string Format  var result   string Format  your right part  0  Your left Part   yourValue     3 You can use Regex class

[c#] Insert variable values in the middle of a string

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