Modfying Part of a String

Modfying Part of a String

• steveharper

  you don't have to change your app to VB. Everything you can acheive using VB you can do it in C# but it might take more lines of code. PS the function you just used was added to VB.Net just for compatibility with VB6.0.

• shivaraj

  It's just a variation of the earlier reply:

  sal = sal.Substring(0, 2) + "s" + sal.Substring(2);

  David Anton
  www.tangiblesoftwaresolutions.com
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• MaTT_17

  Hawkeye7,

  Your second line of code equates to:

      "l" = "s";
  

  which causes the error you got because you attempted to assign a value to a literal.

  Arnie's answer works well, but it adds a slight amount of overhead. You should consider using System.Text.StringBuilder if your application manipulates many strings. Here's how it works in your example:

      string sal = "Hello";
      StringBuilder sb = new StringBuilder(sal);
      sb.Replace('l', 's', 2, 1);
  
      sal = sb.ToString();
  

  Strings in .Net are immutable—once you create one, you can't change it. Adding strings as in "Hello" + " there" doesn't put the two strings side-by-side in memory. Instead, it creates a third string, and this bit of overhead multiplies in code that manipulates many strings—especially in loops.

  I hope this helps.

  grybyx

  
  

• Fairy

  sal = sal.Substring(0, 2) + "s" + sal.Substring(3, 2);

  Not sophisticated, but it works.

  Arnie

  
  

• photek

  ok. Then how would you achieve

  Mid(String, 3, 1) = "s"

  in C#

  
  

• Dmitry Vasilevsky MSFT

  I just moved the app to VB and did

  Mid(String, 3, 1) = "s"

  which worked

  The actual string is 1200 characters long and I needed this functionality. I guess there are some things that you cannot do in C#

  thanks for your help

  
  

• DanielHillier

  thanks,

  sal = sal.Remove(2, 1).Insert(2, "s");

  does what I needed.

  
  

• GJCreme

  Alternatively, the following slightly more concise version is produced by our Instant C# VB to C# converter:

  sal = sal.Remove(2, 1).Insert(2, "s");

  David Anton
  www.tangiblesoftwaresolutions.com
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• Modfying Part of a String