class DatabaseException:Exception
{
public DatabaseException(string message,
System.Data.SqlClient.SQLException exception)
: base(message,innerException: exception)
{
}
public DatabaseException(string message,
System.Data.OracleClient.OracleException exception)
:base(message,innerException:exception)
{
}
public DatabaseException()
{
}
public DatabaseException(string message)
:base(message)
{
}
public DatabaseException(
string message,Exception exception)
:base(message, innerException :exception)
{
//
}
public DatabaseException(
SerializationInfo serializationInfo,
StreamingContext context)
: base(serializationInfo, context)
{
//...
}
}
}
namespace System.Data
{
namespace SqlClient
{
class SQLException:Exception
{
}
}
namespace OracleClient
{
class OracleException : Exception
{
}
}
}
指定要调用的基类中innerException:exception此处:的用处和innerException:exception的含义是什么?