这样的枚举类型如何获得？

[ajuni194]

一个下来菜单，返回邮件的优先级别，当为1是是MailPriority.Normal，类推
我写一个方法，返回MailPriority
代码
public MailPriority GetMailPriority() //MailPriority为一个枚举类型
{
int i=int.Parse(DropDownList1.SelectedItem.Value.Trim());
switch(i)
{
case 1:
return MailPriority.Normal;
break;
case 2:
return MailPriority.Low;
break;
case 3:
return MailPriority.High;
break;
default:
return MailPriority.Normal;
break;
}
}
这样的写法有CS0162编译警告，我该怎么办才好？

[ajuni194]

上面的方法都不行啊
错误发生：检测到无法访问的代码！

[listhome]

string emailType;
switch(i)
{
case 1:
emailType=MailPriority.Normal;
break;
case 2:
emailType= MailPriority.Low;
break;
case 3:
emailType= MailPriority.High;
break;
default:
emailType= MailPriority.Normal;
break;
}
retrun emailType;

[WZCNet]

public String GetMailPriority() //MailPriority为一个枚举类型
{
int i=int.Parse(DropDownList1.SelectedItem.Value.Trim());
String s = String.Empty;
switch(i)
{
case 1:
s =MailPriority.Normal.ToString();
break;
case 2:
s = MailPriority.Low.ToString();
break;
case 3:
s = MailPriority.High.ToString();
break;
default:
s = MailPriority.Normal.ToString();
break;
}

return s;
}