C#中Append()用法

Append()用法

Class Preson

{

private string firstName;

private string middletName;

private string lastName;        //定义3个私有变量 firstName middleName lastName

Public Preson(string fn,string mn,string ln)  //构造函数

{

firstName=fn;

middleName=mn;

lastName=ln;

}

public void displayFull Name()         //定义一个方法名

{

StringBuilder FullName =new StringBuilder();                  //实例化FullName

FullName.Append(firstName);      //FullName =FullName+firstName Full为空 所有只显示FirstName

FullName.Append(" ");              //FullName =FullName +"空格" FullName 已经包含firstName的值

if(middleName[0]!="")        //如果中间名的第一数组里字符非空则向下运行 否则跳出此IF语句

 {

FullName.Append(".");        //满足条件则继续FullName = FullName +"."

FullName.Append(lastname);     //FullName= FullName + lastName的值

Console.WriteLine(FullName);    //输出FullName

}

}

public static void Main()

{

Person me =new Person("Bradley","Lee","Jones");     //实例化

me.displayFullName();                                                 //调用该函数

}

输出结果:Bradley L.Jones

解释:FullName->Bradley  先赋值

        FullName->Bradley_ 加一个空格("_"代表空格 不是下划线)

        FullName->Bradley_L

        FullName->Bradley_L.

        FullName->Bradley_L.Jones

最后FullName= Bradley L.Jones