【C#获取音频文件的播放时间】

[DllImport("Kernel32", CharSet = CharSet.Auto)]

static extern Int32 GetShortPathName(String path, StringBuilder shortPath, Int32 shortPathLength);

[DllImport("winmm.dll")]

public static extern int mciSendString(string m_strCmd, StringBuilder m_strReceive, int m_v1, int m_v2);

private string getasfTime(string filePath)

{

StringBuilder shortpath = new StringBuilder(80);

GetShortPathName(filePath, shortpath, shortpath.Capacity);

string name = shortpath.ToString();

StringBuilder buf = new StringBuilder(80);

mciSendString("close all", buf, buf.Capacity, 0);

mciSendString("open " + name + " alias media", buf, buf.Capacity, 0);

mciSendString("status media length", buf, buf.Capacity, 0);

TimeSpan ts = new TimeSpan(0, 0, 0, 0, (int)Convert.ToDouble(buf.ToString().Trim()));

return ts.ToString();

}

private void button1_Click(object sender, EventArgs e)

{

this.label1.Text = getasfTime("F:\\视频\\游戏视频-贼法竞技场2v2 2200+.avi");

}

注：该程序段能获取的音频或者视频的格式由 [DllImport("winmm.dll")]中的winmm。dll决定。当然可以导入其他dll文件来支持其他格式。但其中函数也随之变化。

添加引用SHELL32.DLL

public static class GetVideoLength

{

public static string GetMediaTimeLen(string path)

{

try

{

Shell32.Shell shell = new Shell32.Shell();

//文件路径

Shell32.Folder folder = shell.NameSpace(path.Substring(0, path.LastIndexOf("\\")));

//文件名称

Shell32.FolderItem folderitem = folder.ParseName(path.Substring(path.LastIndexOf("\\") + 2));

if (Environment.OSVersion.Version.Major >= 6)

{

return folder.GetDetailsOf(folderitem, 27);

}

else

{

return folder.GetDetailsOf(folderitem, 21);

}

}

catch (Exception ex) { return null; }

}

public static int GetMediaTimeLenSecond(string path)

{

try

{

Shell32.Shell shell = new Shell32.Shell();

//文件路径

Shell32.Folder folder = shell.NameSpace(path.Substring(0, path.LastIndexOf("\\")));

//文件名称

Shell32.FolderItem folderitem = folder.ParseName(path.Substring(path.LastIndexOf("\\") + 2));

string len;

if (Environment.OSVersion.Version.Major >= 6)

{

len = folder.GetDetailsOf(folderitem, 27);

}

else

{

len = folder.GetDetailsOf(folderitem, 21);

}

string[] str = len.Split(new char[] { ':' });

int sum = 0;

sum = int.Parse(str[0]) * 60 * 60 + int.Parse(str[1]) * 60 + int.Parse(str[2]);

return sum;

}

catch (Exception ex) { return 0; }

}

}