how to remove character from strings [Answered]RSS

• • Reply
  

  amit_ask

  Member

  150 Points

  175 Posts

  how to remove character from strings

  Jul 23, 2014 02:11 PM|amit_ask|LINK

  i have two string and one array of string.
  let the str1, str2, strArr
  here

        str1="1";
        strArr elements are {2,5,7}
        str2="1,3,4,5,6,1,3,7,2,1,5,6";
  now i want remove those char from str2 which are present in strArr, and str1
  Note: str1 will always have 1 char, but strArr can have any number of elements.
  
   

  Amit Kumar
• • Reply
  

  MetalAsp.Net

  All-Star

  101929 Points

  20709 Posts

  Moderator

  Re: how to remove character from strings

  Jul 23, 2014 02:21 PM|MetalAsp.Net|LINK

  Add str1 to strArr and then use LINQ Except() on str2 & strArr. Easy and simple. 

  Refer: http://msdn.microsoft.com/en-us/library/vstudio/bb300779(v=vs.100).aspx

  Edit: corrected str1 to strArr.

  C# <--> VB.Net  |  jQuery Widgets
• • Reply
  

  Rion William...

  All-Star

  113090 Points

  18367 Posts

  MVP

  Re: how to remove character from strings

  Jul 23, 2014 02:55 PM|Rion Williams|LINK

  There are quite a few ways to handle this, however you would likely want to use the following :

  1. Merge your str1 and all of the values of your strArr into a single collection
  2. Convert your existing str2 string into a collection of values using the String.Split() method so you can easily access all of the individual values.
  3. Use the LINQ Except() method to remove any characters present in your first collection (str1 and strArr)
  4. Use the String.Join() method to recreate your original string.

  You can see a working example below :

  // Your original values
  string str1="1";
  string[] strArr = new string[]{"2","5","7"};
  string str2= "1,3,4,5,6,1,3,7,2,1,5,6";
  
  // Merge your strArr and str1
  var mergedValues = strArr.Concat(new List<string>(){ str1}); // yields { "1", "2", "5", "7" }
  		
  // Split your str2 string into a collection of values
  var str2Values = str2.Split(new char[]{ ','}, StringSplitOptions.RemoveEmptyEntries); // yields { "1", "3", "4", "6", "1", "3", "7", "2", "1", "5", "6" }
  		
  // Remove all values that are present in your mergedValues collection from str2
  str2Values = str2Values.Except(mergedValues).ToArray(); // yields { "3", "4", "6" }
  		
  // Output your updated string
  var updatedStr2 = String.Join(",",str2Values); // yields "3,4,6"
  

  Blog | Twitter | Stack Overflow | LinkedIn