创建型模式之简单工厂模式

/Base class for geting split names
        public class Namer()
        {
               protected string frName,lName;
                public string getFrname()
              {
                  return frName;
               }
               public string getLname()
               {
                         return lName;
               }

        }
         public class  FirstFirst:Namer
          {
               public  FirstFirst(string name)
               {
                    int i=name.IndexOf(" ");
                    if(i>0)
                    {
                           lName=name.Substring(0,i).Trim();  
                               frName=name.Substring(i+1).Trim();
      
                     }else{
                         lName=name;
                         frName="";
                     }
               }
           public class  LastFirst:Namer
          {
               public  LastFirst(string name)
               {
                    int i=name.IndexOf(",");
                    if(i>0)
                    {
                           lName=name.Substring(0,i).Trim();
                            frName=name.Substring(i+1).Trim();
                     }else{
                               lName=name;
                         frName="";
                      }
               }
          }
          public class Namefactory()
          {
               public Namefactory(){}
               public Namer getName(string name)
               int i=name.IndexOf(",");
               if(i>0)
               {
                     return new LastFirst(name);
               }else
               {
                    return new FirstFirst(name);
               }
          }
          private void btnCompute_Click(object sender,System.Event.args e)
          {
               Namer nm=nameFact.getName(txtName.Text);
               txtFirst.Text = nm.getFrname();
               txtLast.Text = nm.getLname();
          }