如何确定歌曲使用winmm.dll多长时间? [英] How to determine how long a song is using winmm.dll?

问题描述

我 P/从WinMM.dll调用了mciSendString方法 :

[DllImport("winmm.dll")]
private static extern long mciSendString(string strCommand, StringBuilder strReturn,
                                         int iReturnLength, IntPtr hwndCallback);

我可以播放，暂停和停止歌曲(我也可以打开/关闭CD驱动器，但这并不重要).现在，我希望用户能够跳到歌曲中的某个部分(例如1:21).我看过搜索功能文档除了我不知道一首歌有多长以外，这似乎很简单.在WinMM中是否存在执行此操作的命令/方法?

I can play, pause, and stop songs (I can also open/close the CD drive, but that's not important). Now I want my user to be able to skip to a certain part in a song (e.g. 1:21). I've looked at the seek functions documentation and it seems pretty staightforward except that I can't figure out how long a song is. Does a command/method exist to do this in WinMM?

推荐答案

可能是这样的:

StringBuilder sb = new StringBuilder(128);
mciSendString("status mediafile length", sb, 128, IntPtr.Zero);
long songlength = Convert.ToUInt64(sb.ToString());

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