我正在编写一个可以对多个流进行操作的类。以下是我目前正在做的示例。
Dictionary<int, int> dict = new Dictionary<int, int>(_Streams.Count);
for (int i = 0; i < _Streams.Count; i++)
{
try
{
dict.Add(i, _Streams[i].Read(buffer, offset, count));
}
catch (System.IO.IOException e)
{
throw new System.IO.IOException(String.Format("I/O exception occurred in stream {0}", i), e);
}
catch (System.NotSupportedException e)
{
throw new System.NotSupportedException(String.Format("The reading of the stream {0} is not supported", i), e);
}
catch (System.ObjectDisposedException e)
{
throw new System.ObjectDisposedException(String.Format("Stream {0} is Disposed", i), e);
}
}
int? last = null;
foreach (var i in dict)
{
if (last == null)
last = i.Value;
if (last != i.Value)
throw new ReadStreamsDiffrentExecption(dict);
last = i.Value;
}
return (int)last;
我希望将我的代码简化为
Dictionary<int, int> dict = new Dictionary<int, int>(_Streams.Count);
for (int i = 0; i < _Streams.Count; i++)
{
try
{
dict.Add(i, _Streams[i].Read(buffer, offset, count));
}
catch (Exception e)
{
throw new Exception(String.Format("Exception occurred in stream {0}", i), e);
}
}
int? last = null;
foreach (var i in dict)
{
if (last == null)
last = i.Value;
if (last != i.Value)
throw new ReadStreamsDiffrentExecption(dict);
last = i.Value;
}
return (int)last;
然而,如果有人试图捕获特定的异常,我的包装器将隐藏Read抛出的异常。我该如何保留异常类型、添加额外信息,但不需要为try块中的每种可能情况编写处理程序。