学用 ASP.Net 之 "字符串" (6): StringInfo 类

学完这个类没感到它会有什么用处, 同样的操作都不如在 string 类里方便, 还要 using System.Globalization;

主要成员:

/* 静态方法 */StringInfo.GetNextTextElement();       //获取指定元素, 默认是获取第一个元素StringInfo.GetTextElementEnumerator(); //获取枚举器StringInfo.ParseCombiningCharacters(); //获取由序号组成的 int[]/* 属性 */LengthInTextElements; //元素数; 只读String;               //对象拥有的字符串; 可读写/* 对象方法 */SubstringByTextElements(); //截取字符串

构造函数及属性:

protected void Button1_Click(object sender, EventArgs e){    StringInfo sf = new StringInfo("abcdefg");    int n1 = sf.LengthInTextElements; //7    string s1 = sf.String;            //abcdefg    TextBox1.Text = string.Concat(n1, "\n", s1);}protected void Button2_Click(object sender, EventArgs e){    StringInfo sf = new StringInfo();    int n1 = sf.LengthInTextElements; //0    string s1 = sf.String;            //    sf.String = "abc";    int n2 = sf.LengthInTextElements; //3    string s2 = sf.String;            //abc    TextBox1.Text = string.Concat(n1, "\n", s1, "\n" + n2, "\n", s2);}

SubstringByTextElements() 方法:

protected void Button1_Click(object sender, EventArgs e){    StringInfo sf = new StringInfo("ABCDEFG");    string s1 = sf.SubstringByTextElements(2);    //CDEFG    string s2 = sf.SubstringByTextElements(2, 3); //CDE    TextBox1.Text = s1 + "\n" + s2;}

三个静态方法:

//StringInfo.GetNextTextElement()protected void Button1_Click(object sender, EventArgs e){    string s1 = StringInfo.GetNextTextElement("ABCDEFG");    //A    string s2 = StringInfo.GetNextTextElement("ABCDEFG", 1); //B    TextBox1.Text = s1 + "\n" + s2;}//StringInfo.ParseCombiningCharacters()protected void Button2_Click(object sender, EventArgs e){    int[] nArr = StringInfo.ParseCombiningCharacters("Asp.Net");    TextBox1.Text = string.Join(", ", nArr); //0, 1, 2, 3, 4, 5, 6}//StringInfo.GetTextElementEnumerator(); 使用 IEnumerator 需 using System.Collections;protected void Button3_Click(object sender, EventArgs e){    string str = "ABCDEFG";    string s1, s2;    s1 = s2 = "";    IEnumerator e1 = StringInfo.GetTextElementEnumerator(str);    while (e1.MoveNext())    {        s1 += string.Format("{0} ", e1.Current); //A B C D E F G     }    IEnumerator e2 = StringInfo.GetTextElementEnumerator(str, 2);    while (e2.MoveNext())    {        s2 += string.Format("{0} ", e2.Current); //C D E F G    }    TextBox1.Text = s1 + "\n" + s2;}

学用 ASP.Net 之 "字符串" (6): StringInfo 类

学用 ASP.Net 之 "字符串" (6): StringInfo 类

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