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Ignore case strings

Discussion in 'C#' started by shah123, Apr 10, 2007.

  1. shah123

    shah123 New Member

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    when enter the text to find the string i want to ignore the case how to implement that in a context below
    Code:
     public override void Search()
            {
                
                //file = new FileStream(@"C:\username.txt", FileMode.Open, FileAccess.Read);
                
                Console.WriteLine("Input a string ");
                String data = Console.ReadLine();
                sr = File.OpenText(@"C:\username.txt");
                String st = sr.ReadToEnd();
               // How to implement ignore cases 
                
                    if (st.Contains(data))
                    {
                        Console.WriteLine("Found at position :" + st.IndexOf(data));
                    }
                    else
                    {
                        Console.WriteLine("Not Found");
                    }
    
    Thanks,
     
  2. shabbir

    shabbir Administrator Staff Member

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    Use CompareNoCase
    or convert both of them to Lower/Upper case before using the contains.
     
  3. shah123

    shah123 New Member

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    How to put CompareNoCase in this method?
     
  4. shah123

    shah123 New Member

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    Any help?
     
  5. shabbir

    shabbir Administrator Staff Member

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    I made an error CompareNoCase is for CString of C++ and not for C# but its CompareTo and I guess the best option is to make each of them to the same case.
     
  6. shah123

    shah123 New Member

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    Thanks Shabbir for this but i got one solution on my own but now as Search functionality works i have something same in switch cases


    Code:
    String s;
                    s = Console.ReadLine();
                    
                    
                    switch (s)
                    {
                        case "g":
                            Console.Clear();
                            uname.getUserName();
                            return choices();
                           // break;
    
    
    if i want to enter "G" it doesnt accept how to do that?
     
  7. shabbir

    shabbir Administrator Staff Member

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    2 Options.
    Have a case Fall Through with "G" and g like the one below.
    Code:
    String s;
    s = Console.ReadLine();
    switch (s)
    {
    	case "g":
    	case "G":
    		Console.Clear();
    		uname.getUserName();
    		return choices();
    	   // break;
    
    or convert the s to the lower case with ToLower.
     
  8. shah123

    shah123 New Member

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    Thanks a million, Shabbir. It worked for me. Now i will continue on how to delete a line from the text file. I will do separate thread at some stage.
     

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