C# Windows系统音量调节Demo源码

基于.NET Framework 4.0开发，包含滑块设置音量，键盘F1、F2调节音量。

通过滑块调节系统音量核心代码

 /// <summary>
        /// 滑块设置音量
        /// </summary>
        private void SetVolume_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            if (isVolumeChange)
            {
                return;

            }
            this.Dispatcher.BeginInvoke(new Action(() =>
            {
                VolumeHelper.VolumeHelper.SetVolume((int)SetVolume.Value);
                TextVolume.Text = Volume + ((int)SetVolume.Value).ToString();

                SoundPlayer player = new SoundPlayer();
                player.Stream = Properties.Resources.Volume;
                player.Play();
            }));
        }

通过键盘系统音量核心代码

#region 获取键盘键值
        private void Window_PreviewKeyUp(object sender, System.Windows.Input.KeyEventArgs e)
        {
            switch (e.Key.ToString())
            {
                case "F1":
                    VolumeUP();
                    this.Dispatcher.BeginInvoke(new Action(() =>
                    {
                        SetVolume.Value = SetVolume.Value + 5;
                        SoundPlayer player = new SoundPlayer();
                        player.Stream = Properties.Resources.Volume;
                        player.Play();
                    }));
                    break;
                case "F2":
                    VolumeDown();
                    this.Dispatcher.BeginInvoke(new Action(() =>
                    {
                        SetVolume.Value = SetVolume.Value - 5;
                        SoundPlayer player = new SoundPlayer();
                        player.Stream = Properties.Resources.Volume;
                        player.Play();
                    }));
                    break;
            }
        }
        #endregion
/// <summary>
        /// 加大音量
        /// </summary>
        private void VolumeUP()
        {
            this.Dispatcher.Invoke(new Action(delegate
            {
                WindowInteropHelper wndHelper = new WindowInteropHelper(this);
                for (int i = 0; i < 5; i++)
                {
                    SendMessage(wndHelper.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);

                    SoundPlayer player = new SoundPlayer();
                    player.Stream = Properties.Resources.Volume;
                    player.Play();
                }
            }));
        }

        /// <summary>
        /// 降低音量
        /// </summary>
        private void VolumeDown()
        {
            this.Dispatcher.Invoke(new Action(delegate
            {
                WindowInteropHelper wndHelper = new WindowInteropHelper(this);
                for (int i = 0; i < 5; i++)
                {
                    SendMessage(wndHelper.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);
                    SoundPlayer player = new SoundPlayer();
                    player.Stream = Properties.Resources.Volume;
                    player.Play();
                }
            }));
        }

C# 音量调节Demo源码下载

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