c#NAudio 录音功能实现

在网上找了很多类似录音教程效果都不好，或根本不能录音，代码由网上借鉴修改（完整实现录音播放功能）

NAudio

NAudio为.NET平台下的开源库，采用ML-PL协议，开源地址：https://github.com/naudio/NAudio。

NAudio功能强大，且其入门容易。
强大在于：它支持许多音频操作，可实现多种API播放与录制、多种不同音频格式、音频格式转换（重采样、位深、声道等）、音频编码、多通道播放、音频效果处理等等（详细介绍可以看Github readme）。

新建RecordController

首先新建引用类 RecordController

public class RecordController 
{
    public WaveIn mWavIn;
    public WaveFileWriter mWavWriter;
    /// <summary>
    /// 开始录音
    /// </summary>
    /// <param name="filePath"></param>
    public void StartRecord(string filePath) 
    {
        mWavIn = new WaveIn();
        mWavIn.DataAvailable += MWavIn_DataAvailable;
        // mWavIn.RecordingStopped += MWavIn_RecordingStopped; 有冲突
        mWavWriter = new WaveFileWriter(filePath, mWavIn.WaveFormat);
        mWavIn.StartRecording();
    }
    /// <summary>
    /// 停止录音
    /// </summary>
    public void StopRecord() 
    {
        mWavIn?.StopRecording();
        mWavIn?.Dispose();
        mWavIn = null;
        mWavWriter?.Close();
        mWavWriter = null;
    }
    //这个方法在调用关闭时会有冲突
    private void MWavIn_RecordingStopped(object sender, StoppedEventArgs e) 
    {
        //mWavIn?.Dispose();
        //mWavIn = null;
        //mWavWriter?.Close();
        //mWavWriter = null;
    }
    private void MWavIn_DataAvailable(object sender, WaveInEventArgs e) 
    {
        mWavWriter.Write(e.Buffer, 0, e.BytesRecorded);
        int secondsRecorded = (int)mWavWriter.Length / mWavWriter.WaveFormat.AverageBytesPerSecond;
    }
}

使用

在主界面引用 RecordController record = new RecordController();

/// <summary>
/// 耳机sidetone测试
/// </summary>
/// <param name="i"></param>
public void Sidetone(int i) 
{
    string[] row = getlistviewitem(i);
    record.StartRecord("e:\rec.wav");
    if (MessageBox.Show("正在录音，点击是播放录音", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.No) 
    {
        record.StopRecord();
        ErrorFlag = false;
        row[6] = "FAIL";
    } else 
    {
        record.StopRecord();
        string path = "e:\rec.wav";
        //.wav音频文件路径
        System.Media.SoundPlayer player = new System.Media.SoundPlayer(path);
        player.Play();
        if (MessageBox.Show("是否有录音", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.No) 
        {
            ErrorFlag = false;
            row[6] = "FAIL";
        } else 
        {
            ErrorFlag = true;
            row[5] = "OK";
            row[6] = "PASS";
        }
    }
    listupdate(row, i);
}

完成代码后测试是能正常录音