c# - How a variable can be recognized from button to method? -


i'm trying count number of words , characters in specific text. works fine want tidy code don't have include the see under newsummarymethod() every button, hence why have placed in it's own method. when this, doesn't count words , characters. know reason string copytext = ""; in method, that's because if don't declare string variable, syntax errors in button copytext not declared.

my question how can newsummarymethod know needs communication copytext in first vowels button? have button copytext may behave bit differently think need button communicate method.

 private void newsummarymethod() {      string copytext = "";       /*count number of lines in processed text, line counted -1 brings correct number*/      int numlines = copytext.split('\n').length - 1;       //seperate characters in order find words      char[] seperator = (" " + nl).tochararray();       //number of words, characters , include line breaks variable      int numberofwords = copytext.split(seperator, stringsplitoptions.removeemptyentries).length;      int numberofchar = copytext.length - numlines;       //unprocessed summary      newsummary = nl + "word count: " + numberofwords + nl + "characters count: " + numberofchar;  }   private void btnvowels_click(object sender, eventargs e) {      //strip vowels      string vowels = "aaeeiioouu";      string copytext = richtextbox1.text;      copytext = new string(copytext.where(c => !vowels.contains(c)).toarray());       newsummarymethod();       //write richtextbox2      wholetext = richtextbox1.text + oldsummary + copytext + newsummary;      write(second_file, wholetext);      richtextbox2.text = wholetext;  }   private void btnalpha_click(object sender, eventargs e) {       //remove non alpha characters      string nonalpha = @"[^a-za-z ]+";      string addspace = "";      string copytext = richtextbox1.text;      copytext = regex.replace(copytext, nonalpha, addspace);       newsummarymethod();       //write richtextbox2      wholetext = richtextbox1.text + oldsummary + copytext + nl + newsummary;      write(second_file, wholetext);      richtextbox2.text = wholetext;   }

you can pass data method needs argument

private void newsummarymethod(string copytext) {...}

and call like

newsummarymethod(copytext);

another way declaring variable outside function scope both functions have access it.

string copytext = null;  //added   private void newsummarymethod() {      copytext = ""; //changed       /*count number of lines in processed text, line counted -1 brings correct number*/      int numlines = copytext.split('\n').length - 1;       //seperate characters in order find words      char[] seperator = (" " + nl).tochararray();       //number of words, characters , include line breaks variable      int numberofwords = copytext.split(seperator, stringsplitoptions.removeemptyentries).length;      int numberofchar = copytext.length - numlines;       //unprocessed summary      newsummary = nl + "word count: " + numberofwords + nl + "characters count: " + numberofchar;  }   private void btnvowels_click(object sender, eventargs e) {      //strip vowels      string vowels = "aaeeiioouu";      copytext = richtextbox1.text; //changed      copytext = new string(copytext.where(c => !vowels.contains(c)).toarray());       newsummarymethod();       //write richtextbox2      wholetext = richtextbox1.text + oldsummary + copytext + newsummary;      write(second_file, wholetext);      richtextbox2.text = wholetext;  }   private void btnalpha_click(object sender, eventargs e) {       //remove non alpha characters      string nonalpha = @"[^a-za-z ]+";      string addspace = "";      copytext = richtextbox1.text; //changed      copytext = regex.replace(copytext, nonalpha, addspace);       newsummarymethod();       //write richtextbox2      wholetext = richtextbox1.text + oldsummary + copytext + nl + newsummary;      write(second_file, wholetext);      richtextbox2.text = wholetext;   }

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