How to convert it to string back? [closed]

by

It’s not possible unless you are 100% sure all characters in txt are in the range 0-9, 10-99, 100-999, etc. (that is: the string representation of the integer value of each character has a fixed length)

Since you are not separating them, the results are ambiguous

Update

As per the comments, you want to do some encryption and decryption. This is a very weak encryption method and I don’t really recommend you to do this, but adding a delimiter could help you do this:

  public static string Encode(string txt)
  {
      string result = string.Empty;
      foreach (char ch in txt)
      {
          // "tku" will be our delimiter
          result += Convert.ToString((int)ch, 10) + "tku";;
      }
      result = result.Replace("0", "dos");
      result = result.Replace("1", "vso");
      result = result.Replace("2", "otw");
      result = result.Replace("3", "foa");
      result = result.Replace("4", "bae");
      result = result.Replace("5", "xgd");
      result = result.Replace("6", "ymt");
      result = result.Replace("7", "ksx");
      result = result.Replace("8", "wte");
      result = result.Replace("9", "rom");
      Console.WriteLine(result);
      return result;
    }

    public static string Decode(string txt)
    {
        string result = txt;
        result = result.Replace("dos", "0");
        result = result.Replace("vso", "1");
        result = result.Replace("otw", "2");
        result = result.Replace("foa", "3");
        result = result.Replace("bae", "4");
        result = result.Replace("xgd", "5");
        result = result.Replace("ymt", "6");
        result = result.Replace("ksx", "7");
        result = result.Replace("wte", "8");
        result = result.Replace("rom", "9");
        // "tku" will be converted to spaces
        result = result.Replace("tku", " ");
        string result2 = string.Empty;
        // and we split over them
        foreach(var res in result.Split(' '))
        {
          if(!String.IsNullOrWhiteSpace(res))
          {
            result2 += ((char)Int32.Parse(res)).ToString();
          }
        }           
        return result2;
    }

I’ve made a fiddle here: https://dotnetfiddle.net/zV9zYw

Again, I strongly recommend against this, just put it to let you know how it works. I’ve not optimized the code or tried to make it any better than yours.

This encryption is extremely weak, and there are good two way encription engines built in the .NET framework.

PS: for readers, the code comes from OP’s comments, pasted here

More Related Contents:

  1. Split and cut string in C# [closed]
  2. Is there a difference between “throw” and “throw ex”?
  3. C# DLL config file
  4. How can I read a file even when getting an “in use by another process” exception?
  5. Can’t get Czech characters while generating a PDF
  6. Most accurate timer in .NET?
  7. How to check a input IP fall in a specific IP range
  8. DataContractSerializer doesn’t call my constructor?
  9. The entity type ‘Microsoft.AspNet.Identity.EntityFramework.IdentityUserLogin’ requires a key to be defined
  10. WCF change endpoint address at runtime
  11. How can a C++ windows dll be merged into a C# application exe?
  12. Aggregate $lookup with C#
  13. Count regex replaces (C#)
  14. C# Iterate through Class properties
  15. OpenFileDialog can’t load CSV files but can load xls/xlsx Excel files [duplicate]
  16. Is there a complete IEquatable implementation reference?
  17. Trim last character from a string
  18. C#: Dynamic runtime cast
  19. ComboBox SelectedItem vs SelectedValue
  20. Set background color of WPF Textbox in C# code
  21. Share Session between two web sites using asp.net and state server
  22. Duplicate key exception from Entity Framework?
  23. Providing subcommands to a command (sudo/su) executed with SSH.NET SshClient.CreateShellStream
  24. How do I specify that a property should generate a TEXT column rather than an nvarchar(4000)
  25. How do I get the Controller and Action names from the Referrer Uri?
  26. JSON.Net Xml Serialization misunderstands arrays
  27. Changing font in a Console window in .NET
  28. How to get a null terminated string from a C# string?
  29. Can somebody explain this odd behavior when working with ThreadPool?
  30. Using Serializable attribute on Model in WebAPI

Leave a Comment