dotnet use regex two samples

using System;

using System.Text.RegularExpressions;

using System.IO;

using System.Collections;

   

public class test

{

public static string removeTextQualifier(string text)

{

string pattern = "^\"(?<word>.*)\"$";

Regex rgx = new Regex(pattern);

MatchCollection matches = rgx.Matches(text);

if(matches.Count>0)

return matches[0].Groups[0].Value.Replace("\"\"", "\"");

else

return text;

}

   

public static void regexReplaceDemo(int type)

{

string words = "letter alphabetical missing lack release " +

"penchant slack acryllic laundry cease";

if(type == 2)

words = @"select *from table1 left join table2 on table1.col1=table2.col2

right join t3 on table1.col2=t3.col1 full join t4 on t4.c1=t3.col2 where 1=1

and 2=2 or 3=3";

Console.WriteLine("Original words:");

Console.WriteLine(words);

Console.WriteLine();

Console.WriteLine("First Letter Capital words:");

Console.WriteLine(Regex.Replace(words, @"\w+", (m) => {

//change the first letter to capitalize

if(type == 1)

return m.Value[0].ToString().ToUpper() + m.Value.Substring(1);

else

{

string keywordslist = " select from where and or join left right full on ";

if(keywordslist.IndexOf(" " + m.Value + " ")>-1)

return m.Value.ToUpper();

else

return m.Value;

}

}));

}

   

public static void Main(string[] args)

{

regexReplaceDemo(1);

regexReplaceDemo(2);

}

 

}