扫一扫
分享文章到微信
扫一扫
关注官方公众号
至顶头条
using System; using System.Runtime.InteropServices; using System.Text; using System.IO ; namespace clsMCIPlay { /// <summary> /// clsMci 的摘要说明。 /// </summary> public class clsMCI { public clsMCI() { // // TODO: 在此处添加构造函数逻辑 // } //定义API函数使用的字符串变量 [MarshalAs(UnmanagedType.ByValTStr,SizeConst=260)] private string Name = "" ; [MarshalAs(UnmanagedType.ByValTStr,SizeConst=128)] private string durLength = "" ; [MarshalAs(UnmanagedType.LPTStr,SizeConst=128)] private string TemStr =""; int ilong; //定义播放状态枚举变量 public enum State { mPlaying = 1, mPuase = 2, mStop = 3 }; //结构变量 public struct structMCI { public bool bMut; public int iDur; public int iPos; public int iVol; public int iBal; public string iName; public State state; }; public structMCI mc =new structMCI() ; //取得播放文件属性 public string FileName { get { return mc.iName; } set { //ASCIIEncoding asc = new ASCIIEncoding(); try { TemStr =""; TemStr = TemStr.PadLeft(127,Convert.ToChar(" ")); Name = Name.PadLeft(260,Convert.ToChar(" ")) ; mc.iName = value; ilong = APIClass.GetShortPathName(mc.iName,Name, Name.Length); Name = GetCurrPath(Name); //Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media"; Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media"; ilong = APIClass.mciSendString("close all", TemStr, TemStr.Length , 0); ilong = APIClass.mciSendString( Name, TemStr, TemStr.Length, 0); ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length , 0); mc.state = State.mStop; } catch { MessageBox.Show("出错错误!"); } } } //播放 public void play() { TemStr = ""; TemStr = TemStr.PadLeft(127,Convert.ToChar(" ")); APIClass.mciSendString("play media", TemStr, TemStr.Length , 0); mc.state = State.mPlaying ; } //停止 public void StopT() { TemStr = ""; TemStr = TemStr.PadLeft(128,Convert.ToChar(" ")); ilong = APIClass.mciSendString("close media", TemStr, 128, 0); ilong = APIClass.mciSendString("close all", TemStr, 128, 0); mc.state = State.mStop ; } public void Puase() { TemStr = ""; TemStr = TemStr.PadLeft(128,Convert.ToChar(" ")); ilong = APIClass.mciSendString("pause media", TemStr, TemStr.Length, 0); mc.state = State.mPuase ; } private string GetCurrPath(string name) { if(name.Length <1) return ""; name = name.Trim(); name = name.Substring(0,name.Length-1); return name; } //总时间 public int Duration { get { durLength = ""; durLength = durLength.PadLeft(128,Convert.ToChar(" ")) ; APIClass.mciSendString("status media length", durLength, durLength.Length, 0); durLength = durLength.Trim(); if(durLength == "") return 0; return (int)(Convert.ToDouble(durLength) / 1000f); } } //当前时间 public int CurrentPosition { get { durLength = ""; durLength = durLength.PadLeft(128,Convert.ToChar(" ")) ; APIClass.mciSendString("status media position", durLength, durLength.Length, 0); mc.iPos = (int)(Convert.ToDouble(durLength) / 1000f); return mc.iPos; } } } public class APIClass { [DllImport("kernel32.dll", CharSet = CharSet.Auto)] public static extern int GetShortPathName ( string lpszLongPath, string shortFile, int cchBuffer ); [DllImport("winmm.dll", EntryPoint="mciSendString", CharSet = CharSet.Auto)] public static extern int mciSendString ( string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback ); } } |
如果您非常迫切的想了解IT领域最新产品与技术信息,那么订阅至顶网技术邮件将是您的最佳途径之一。
现场直击|2021世界人工智能大会
直击5G创新地带,就在2021MWC上海
5G已至 转型当时——服务提供商如何把握转型的绝佳时机
寻找自己的Flag
华为开发者大会2020(Cloud)- 科技行者