1.C#编程学习——关于try和catch使用

1.C#编程学习——关于try和catch使用

源代码

如下：

//-----------------------------------------------
// CsDateProperties.cs ?2001 byCharles Petzold
//-----------------------------------------------
usingSystem;
 
classCsDateProperties
{
   
publicstaticvoid Main()
    {
       
Date mydate =
newDate();
 
       
try
        {
            mydate.Month = 8;
            mydate.Day = 29;
            mydate.Year = 2001;
 
           
Console.WriteLine("Day of year = {0}", mydate.DayOfYear);
        }
       
catch (Exceptionexc)
        {
           
Console.WriteLine(exc);
        }
    }
}
classDate
{
   
// Fields
   
int year;
   
int month;
   
int day;
   
staticint[] MonthDays =
newint[]{   0, 31,  59,  90, 120, 151,
                                          181, 212, 243, 273, 304, 334 };
 
   
// Properties
   
publicint Year
    {
       
set
        {
           
if (value < 1600)
               
thrownewArgumentOutOfRangeException("Year");
           
else
                year =
value;
        }
       
get
        {
           
return year;
        }
    }
   
publicint Month
    {
       
set
        {
           
if (value < 1 ||
value > 12)
               
thrownewArgumentOutOfRangeException("Month");
           
else
                month =
value;
        }
       
get
        {
           
return month;
        }
    }
   
publicint Day
    {
       
set
        {
           
if (value < 1 ||
value > 31)
               
thrownewArgumentOutOfRangeException("Day");
           else
                day =
value;
        }
       
get
        {
           
return day;
        }
    }
   
publicint DayOfYear
    {
       
get
        {
           
return MonthDays[month - 1] + day +
                                (month > 2&& IsLeapYear(year) ? 1 : 0);
        }
    }
   
// Method
   
publicstaticbool IsLeapYear(int
year)
    {
       
return (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0));
    }
}

其中代码中使用

Date mydate =
newDate();来构造Date对象。