Determines the number of Chinese characters in the input string and the number of Chinese characters in the string.

Determines the number of Chinese characters in the input string and the number of Chinese characters in the string.

1 using System; 2 using System. collections. generic; 3 using System. componentModel; 4 using System. data; 5 using System. drawing; 6 using System. text; 7 using System. windows. forms; 8 using System. text. regularExpressions; 9 using System. collections; 10 11 namespace Test1912 {13 public partial class Form1: Form14 {15 public Form1 () 16 {17 InitializeComponent (); // initialize the Form 18} 19 private void button#click (ob Ject sender, EventArgs e) // click event 20 {21 ArrayList itemList = new ArrayList (); // defines an empty array 22 CharEnumerator CEnumerator = textBox1.Text. getEnumerator (); // give the string in textBox1 Text to CEnumerator23 Regex regex = new Regex ("^ [\ u4e00-\ u9fa5] {0,} $ "); // define a regular expression. Here, only Chinese characters can be entered. 24 while (CEnumerator. MoveNext () // incrementing index, pointing to the next character. If there is no next character, the loop is stopped. 25 {26 if (regex. isMatch (CEnumerator. current. toString (), 0) // if the current character of CEnumerator complies with the regex rule, insert this character into itemlist. 27 itemList. Add (CEnumerator. Current. ToString (); 28 textBox2.Text = itemList. Count. ToString (); // display the number of itemList items in textBox2. 29} 30} 31} 32}