c# - 我应该如何处理两个类之间的异常？

Question

请参阅代码注释中的问题。

我有两个类。

这是主要类(class)(第 1 课):

//this class contains controls on the form.
Class MyApp
{
    private void btnProcessImages_Click(object sender, EventArgs e)
    {
        /* if an error occurs in the method below, I want to: 
               1. Show the error message, and
               2. Based on fail or success do different actions.
        */
        Calculate.DevideNumbers(2, 0);
    }

    /* 
       if the above is successful, I want to do 1 thing, 
       if not, i want to do something else (with controls on THIS form).
    */ 

}

这是第二类:

Class Calculate
{
     public double void DivideNumbers(int num1, int num2)
     {
           double result = 0.00;

           try
           {
                result = num1/num2;
                return result;
           }
           catch (Exception)
           {
                throw;
           }  
     }
}

我的问题是:
DivideNumbers() 向调用方法报告错误的最佳方式是什么？

调用者需要知道是否有错误以及错误消息是什么。我将如何发送这两条信息的调用方法？

Answer 1

删除 DivideNumbers 中的 try catch让异常冒泡。

然后将调用转至 Calculate.DevideNumbers(2, 0);在 try catch block 中。

//this class contains controls on the form.
Class MyApp
{
    private void btnProcessImages_Click(object sender, EventArgs e)
    {
      try
      {
          Calculate.DevideNumbers(2, 0);
      }
      catch (Exception e)
      {
           DoStuff();
           Return();
      }
    }
}