In your code you're referencing oException and _oException. How this property is defined in the class?

>I few weeks ago I asked a question about using an event to handle exceptions. Here's a follow up.
>
>Assume I have this method in my Data Access class:
>
>

>public int ExecuteNonQuery(string sCommand, ArrayList colParams, CommandType Type)
>{
>    int iRetVal = 0;
>
>    SqlConnection oConn = _GetConnection(true);
>
>    if (oException == null)
>    {
>        SqlCommand oCommand = new SqlCommand();
>        oCommand.CommandText = sCommand;
>        oCommand.Connection = oConn;
>
>        if (colParams != null)
>        {
>            SqlParameter[] aParams = new SqlParameter[colParams.Count];
>            colParams.CopyTo(aParams);
>
>            oCommand.Parameters.Clear();
>            oCommand.Parameters.AddRange(aParams);
>        }
>
>        oCommand.CommandType = Type;
>
>        try
>        {
>            iRetVal = oCommand.ExecuteNonQuery();
>        }
>        catch (SqlException e)
>        {
>            _oException = e;
>        }
>        finally
>        {
>            if (oConn.State == ConnectionState.Open)
>            {
>                oConn.Close();
>            }
>        }
>
>        if (_oException == null)
>        {
>            oCommand.Parameters.Clear();
>        }
>
>    }
>
>    return iRetVal;
>}
>

>
>You can see that this class uses a try/catch blocks to trap exceptions. If an exception is caught it is stored to the oException property. Then in the class that uses this I can check to see of the oException property is no longer null.
>
>What's the right way to do this?