// 根据当前需要保存的记录路径，自动准备 Channel
// 尽量利用以前的 Channel，如果 Url 没有变化的话
public static RmsChannel GetChannel(
RmsChannelCollection Channels,
Stop stop,
string strUrl,
RmsChannel cur_channel)
{
RmsChannel old_channel = cur_channel;
// 准备 Channel
if (cur_channel.Url != strUrl)
{
cur_channel.Close();
cur_channel = Channels.CreateTempChannel(strUrl);
if (old_channel != null)
{
stop.OnStop -= (sender1, e1) =>
{
if (old_channel != null)
old_channel.Abort();
};
}
stop.OnStop += (sender1, e1) =>
{
if (cur_channel != null)
cur_channel.Abort();
};
}
return cur_channel;
}