C# 文字转语音/C# 使用user32.dll控制音量

C# 文字转语音/C# 使用user32.dll控制音量

文字转语音

1、使用nuget安装：System.Speech，代码如下：

using System.Speech.Synthesis;

SpeechSynthesizer synth = new SpeechSynthesizer();

 //开始朗读
private void speakParagh(string text)
{
	synth.Speak(text);
}

//朗读结束后释放资源 
private void Completed(IAsyncResult result)
{
	synth.SpeakAsyncCancelAll();
}

//调用
public void GetMessage()
{
	MyDelegate myDelegate = new MyDelegate(speakParagh); //异步调用委托
	string content = 有1条公告消息未读，请及时查阅！";
	myDelegate.BeginInvoke(content, new AsyncCallback(Completed), null); //在启动异步线程后
}

2、C#控制音量：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace 
{
    public class SetsysVolume
    {
        private const byte VK_VOLUME_MUTE = 0xAD;
        private const byte VK_VOLUME_DOWN = 0xAE;
        private const byte VK_VOLUME_UP = 0xAF;
        private const UInt32 KEYEVENTF_EXTENDEDKEY = 0x0001;
        private const UInt32 KEYEVENTF_KEYUP = 0x0002;
        [DllImport("user32.dll")]
        static extern void keybd_event(byte bVk, byte bScan, UInt32 dwFlags, UInt32 dwExtraInfo);
        [DllImport("user32.dll")]
        static extern Byte MapVirtualKey(UInt32 uCode, UInt32 uMapType);
        //加音量,每次加2
        public static void VolumeUp()
        {
            keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY, 0);
            keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
        }
        //减音量，每次减2
        public static void VolumeDown()
        {
            keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY, 0);
            keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
        }
        //使系统静音
        public static void Mute()
        {
            keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY, 0);
            keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
        }
        //设置音量，参数为音量大小
        public void SetVolunme(int volume)
        {
            int half_volume = volume / 2;
            for (int i = 0; i <= 50; i++)
            {
                VolumeDown();
            }
            for (int i = 0; i <= half_volume; i++)
            {
                VolumeUp();
            }
        }
    }
}