Regular expressions Regex class common methods

1, IsMatch () method, the IsMatch () method is actually a return bool worthwhile method, if the test character satisfies the regular expression return true otherwise returns false.

Example:

Match the regular expression, minus @ does not affect the effect of the regex r = new Regex (@ "^[0-9]");//start matching match m = R.match (This.textBox1.Text); while (m.success) {       MessageBox.Show ("The first is the number");       return;}

Detects the value entered in the TextBox1, the first is not a number.

Small bet

1, IsMatch () method; the IsMatch () method is actually a return bool-worthy method, if the test character satisfies the regular expression return true otherwise returns false.

2. The @ symbol is used to output the @ "", and the contents of the middle of the two quotes are output as-is, regardless of the special symbol.

2, replace () method, the Replace () method is actually a replacement method, replacing the matching regular expression matching pattern.

Example:

Using system;using system.collections.generic;using system.linq;using system.text;using System.text.regularexpressions;namespace testregularexpressions{    class program    {        static void Main ( String[] args)       {            string regulartext = "\\w{1,}@\\w{1,}\\.";            String groupemail = "111@126.com";            if (Regex.IsMatch (groupemail,regulartext))            {                Console.WriteLine (Regex.Replace (Groupemail, "@", "= = ="));            }            Else            {                Console.WriteLine ("Not matched successfully! ");            }            Console.readkey ();}}}    

Output:

3, Split () method, Split () method is actually a split method, according to the matching regular expression of the split stored in the string array.

Example:

Using system;using system.collections.generic;using system.linq;using system.text;using System.text.regularexpressions;namespace testregularexpressions{    class program    {        static void Main ( String[] args)        {            string regulartext = ";";            String groupemail = "111@126.com;222@126.com;333@126.com;444@126.com;";            String[] Email;            Email = Regex.Split (Groupemail, regulartext);            foreach (String personemail in Email)            {                Console.WriteLine (personemail);            }            Console.readkey ();}}}    

Output:

Small bet

You can use the String.Split method for the string, which is the same effect. For example, to remove the vsnt in English, the code is as follows:

String[] Au=vsnt.split (', ');

Function specifics: Click to open link

Split function Small Package:

        #region split the string according to pattern///<summary>//        split string by pattern///</summary>//        <param Name= "Input" > string to Split </param>//        <param name= "pattern" > Split identifier </param>///        <returns > Split array </returns>        private string[] splitstring (string input, string pattern)        {            string[] Email;            Email = Regex.Split (input, pattern);            return Email;        }        #endregion

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