Csharp的音乐播放类.doc

MP3 类一using System;using System.Collections.Generic;using System.Text;using System.Runtime.InteropServices;namespace KJJclass API public const int WM_SYSCOMMAND = 0x112; public const int SC_MOVE = 0xF010; public const int HTCAPTION = 0x2; DllImportAttribute(user32.dll) public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam); DllImportAttribute(user32.dll) public static extern bool ReleaseCapture(); 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);MP3 类二 class Form32 public static void OpenAndPlay(string strFileName, bool flagRepeat) string strCommand = ; string buf = ; strCommand = open + strFileName + alias music; buf = buf.PadLeft(128, ); API.mciSendString(strCommand, buf, buf.Length, 0); if (flagRepeat) strCommand = play music repeat; else strCommand = play music; API.mciSendString(strCommand, buf, buf.Length, 0); public static void Play(bool flagRepeat) string strCommand = ; if (flagRepeat) strCommand = play music repeat; else strCommand = play music; API.mciSendString(strCommand, , 0, 0); public static bool SetProcess(int nPosition) bool success = false; string strCommand = string.Format(seek music to 0, nPosition); if (API.mciSendString(strCommand, , 0, 0) = 0) success = true; return success; public static void StepN(int nStep) API.mciSendString(step music by + nStep.ToString(), , 0, 0); public static void Stop() /暂停播放 API.mciSendString(stop music, , 0, 0); public static void Pause()/暂停 API.mciSendString(pause music, , 0, 0); public static void Resume()/继续播放 API.mciSendString(resume music, , 0, 0); public static int GetCurrentPosition() /获得当前播放位置 string buf = ; buf = buf.PadLeft(128, ); API.mciSendString(status music position, buf, buf.Length, 0); buf = buf.Trim().Replace(0, ); if (string.IsNullOrEmpty(buf) return 0; else return (int)(Convert.ToDouble(buf) / 1000; public static void Forward()/快进 int x = Form32.GetCurrentPosition(); int y = 1000 * x + 2000; Form32.SetProcess(y); public static void Backward() /后退 int x = Form32.GetCurrentPosition(); int y = 1000 * x - 2000; Form32.SetProcess(y); public static bool SetVolume(int Valume) /设置音量大小 bool success = false; string strCommand = string.Format(setaudio music volume to 0, Valume); if (API.mciSendString(strCommand, , 0, 0) = 0) success = true; return success; public static int GetVolume() /获得当前音量 string strVolume = ; strVolume = strVolume.PadLeft(128, ); API.mciSendString(status music volume, strVolume, strVolume.Length, 0); int nVolume = 0; strVolume = strVolume.Trim().Replace(0, ); if (string.IsNullOrEmpty(strVolume) nVolume = 0; else nVolume = Convert.ToInt32(strVolume); return nVolume; public static void increase_voice()/加大音量 SetVolume(GetVolume() + 250); public static void decrease_voice()/减少音量 SetVolume(GetVolume() - 250); MP3总代码namespace KJJ public partial class Form3 : Form public Form3() InitializeComponent(); private void b1_Click(object sender, EventArgs e) OpenFileDialog x = new OpenFileDialog(); DialogResult y = x.ShowDialog(); if (y = DialogResult.OK) t1.Text = x.FileName; private void b2_Click(object sender, EventArgs e) Form32.OpenAndPlay(t1.Text, true); private void b3_Click(object sender, EventArgs e) if (b3.Text = 暂停) Form32.Pause(); b3.Text = 继续播放; else Form32.Resume(); b3.Text = 暂停; private void b4_Click(object sender, EventArgs e) Form32.Stop(); private void b5_Click(object sender, EventArgs e) Form32.Forward(); Form32.OpenAndPlay(t1.Text, true); private void b6_Click(object sender, EventArgs e) Form32.Backward(); Form32.OpenAndPlay(t1.Text, true); private void b7_Click(object sender, EventArgs e) Form32.increase_voice(); private void b8_Click(object sender, EventArgs e) Form32.decrease_voice(); 视频代码button1代码 DialogResult dr = openFileDialog1.ShowDialog(); if (dr = DialogResult.OK) textBox1.Text = openFileDialog1.FileName; button2代码 string strFile = textBox1.Text; axWindowsMediaPlayer1.URL = strFile; axWindowsMediaPlayer1.Ctlcontrols.play();光标测试t1_KeyDown代码 if (e.KeyValue = 13) t4.Focus(); else if (e.KeyValue = 40) t4.Focus(); else if (e.KeyValue = 39) t2.Focus(); else if (e.KeyValue = 38) t7.Focus(); else if (e.KeyValue = 37) t9.Focus(); t2_KeyDown代码 if (e.KeyValue = 13) t4.Focus(); else if (e.KeyValue = 40) t5.Focus(); else if (e.KeyValue = 39) t3.Focus(); else if (e.KeyValue = 38) t8.Focus(); else if (e.KeyValue = 37) t1.Focus(); t3_KeyDown代码 if (e.KeyValue = 13) t4.Focus(); else if (e.KeyValue = 40) t6.Focus(); else if (e.KeyValue = 39) t4.Focus(); else if (e.KeyValue = 38) t9.Focus(); else if (e.KeyValue = 37) t2.Focus(); t4_KeyDown代码 if (e.KeyValue = 13) t7.Focus(); else if (e.KeyValue = 40) t7.Focus(); else if (e.KeyValue = 39) t5.Focus(); else if (e.KeyValue = 38) t1.Focus(); else if (e.KeyValue = 37) t3.Focus(); t5_KeyDown代码 if (e.KeyValue = 13) t7.Focus(); else if (e.KeyValue = 40) t8.Focus(); else if (e.KeyValue = 39) t6.Focus(); else if (e.KeyValue = 38) t2.Focus(); else if (e.KeyValue = 37) t4.Focus(); t6_KeyDown代码 if (e.KeyValue = 13) t7.Focus(); else if (e.KeyValue = 40) t9.Focus(); else if (e.KeyValue = 39) t7.Focus(); else if (e.KeyValue = 38) t3.Focus(); else if (e.KeyValue = 37) t5.Focus(); t7_KeyDown代码 if (e.KeyValue = 13) t1.Focus(); else if (e.KeyValue = 40) t1.Focus(); else if (e.KeyValue = 39) t8.Focus(); else if (e.KeyValue = 38) t4.Focus(); else if (e.KeyValue = 37) t6.Focus(); t8_KeyDown代码 if (e.KeyValue = 13) t1.Focus(); else if (e.KeyValue = 40) t2.Focus(); else if (e.KeyValue = 39) t9.Focus(); else if (e.KeyValue = 38) t5.Focus(); else if (e.KeyValue = 37) t7.Focus(); t9_KeyDown代码 if (e.KeyValue = 13) t1.Focus(); else if (e.KeyValue = 40) t3.Focus(); else if (e.KeyValue = 39) t1.Focus(); else if (e.KeyValue = 38) t6.Focus(); else if (e.KeyValue = 37) t8.Focus(); button1_Click代码 StringBuilder str = new StringBuilder(); str.AppendFormat(第一个输入值是： + t1.Text); str.AppendFormat(n第二个输入值是： + t2.Text); str.AppendFormat(n第三个输入值是： + t3.Text); str.AppendFormat(n第四个输入值是： + t4.Text); str.AppendFormat(n第五个输入值是： + t5.Text); str.AppendFormat(n第六个输入值是： + t6.Text); str.AppendFormat(n第七个输入值是： + t7.Text); str.AppendFormat(n第八个输入值是： + t8.Text); str.AppendFormat(n第九个输入值是： + t9.Text); MessageBox.Show(str.ToString(); button2_Click代码 this.Close(); add代码using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.OleDb;namespace KJJ public partial class add : Form public add() InitializeComponent(); OleDbConnection conn = new OleDbConnection(); OleDbCommand comm = new OleDbCommand(); DialogResult result; private void button1_Click(object sender, EventArgs e) StringBuilder sql = new StringBuilder(); sql.AppendFormat(insert into 学生基本信息 values(0,1,2,3,4,5,6) , t1.Text, t2.Text, comboBox1.SelectedItem.ToString(), t4.Text, t5.Text, t6.Text, t7.Text ); try conn.ConnectionString = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Student.mdb; conn.Open(); comm.Connection = conn; comm.CommandType = CommandType.Text; comm.CommandText = sql.ToString(); int x = comm.ExecuteNonQuery(); if (x = 1) result = DialogResult.OK; this.DialogResult = result; MessageBox.Show(插入新记录成功); this.Close(); catch (Exception x) MessageBox.Show(x.Message); finally conn.Close(); update代码using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.OleDb;namespace KJJ public partial class update : Form public update() InitializeComponent(); public static String data; OleDbConnection conn = new OleDbConnection(); OleDbCommand comm = new OleDbCommand(); OleDbDataAdapter adapt = new OleDbDataAdapter(); DataTable dt = new DataTable(); DataRow dr; DialogResult result; private void update_Load(object sender, EventArgs e) try conn.ConnectionString = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Student.mdb; conn.Open(); comm.Connection = conn; comm.CommandType = CommandType.Text; comm.CommandText = select * from 学生基本信息 where 学号= + data + ; adapt.SelectCommand = comm; adapt.Fill(dt); dr = dt.Rows0; t1.Text = dr0.ToString(); t2.Text = dr1.ToString(); comboBox1.SelectedItem = dr2.ToString(); t4.Text = dr3.ToString(); t5.Text = dr4.ToString(); t6.Text = dr5.ToString(); t7.Text = dr6.ToString(); catch (Exception x) MessageBox.Show(x.Message); finally conn.Close(); private void button1_Click(object sender, EventArgs e) StringBuilder sql = new StringBuilder(); sql.AppendFormat(update 学生基本信息 set 姓名=1,性别=2,年级=3,班级=4,电话=5,年龄=6where 学号=0 , t1.Text, t2.Text, comboBox1.SelectedItem.ToString(), t4.Text, t5.Text, t6.Text, t7.Text); try conn.ConnectionString = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Student.mdb; conn.Open(); comm.Connection = conn; comm.CommandType = CommandType.Text; comm.CommandText = sql.ToString(); int x = comm.ExecuteNonQuery(); if (x = 1) result = DialogResult.OK; this.DialogResult = result; MessageBox.Show(修改记录成功); this.Close(); catch (Exception x) MessageBox.Show(x.Message); finally conn.Close(); 数据库代码using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.OleDb;namespace KJJ public partial class Form4 : Form public Form4() InitializeComponent(); OleDbCommand comm = new OleDbCommand(); OleDbConnection conn = new OleDbConnection(); OleDbDataAdapter adapt = new OleDbDataAdapter(); DataTable dt = new DataTable(); /按条件查询并更新视图 private void button1_Click(object sender, EventArgs e) select(); public void select() String temp = 1=1; if (textBox1.Text.Trim() != ) temp += and 学号= + textBox1.Text.Trim() + ; if (textBox2.Text.Trim() != ) temp += and 姓名= + textBox2.Text.Trim() + ; if (comboBox1.Text.Trim() != ) temp += and 性别= + comboBox1.Text.Trim() + ; if (textBox4.Text.Trim() != ) temp += and 年级= + textBox4.Text.Trim() + ; String sql = Select * from 学生基本信息 where + temp; try conn.ConnectionString = Provider=Microsoft.Jet.OLEDB.4.0;Data source= + Application.StartupPath + Student.mdb; conn.Open(); comm.Connection = conn; comm.CommandTy