Question

您好请你给我一些允许我读取存储在数据库中的file.wav（“alarme.wav”）的代码，我试过以下代码：

private void button1_Click (object sender, EventArgs e)
{

OdbcConnection cn = new OdbcConnection ("DSN = cp1");
cn.Open ();
OdbcCommand cmd1 = new OdbcCommand ("select path from WHERE Code Alarm alarm = 32 ",     cn);
cmd1.Connection = cn;
fileName = cmd1.ToString ();
WaveOut wave = new ();
wave.DeviceNumber = 0;
playSound (0);

但他给了我以下错误： “无法找到文件'C：\ Users \ wafa \ Documents \ Visual Studio 2010 \ Projects \ ALARMED \ ALARMED \ bin \ Debug \ System.Data.Odbc.OdbcCommand'。” 在线： “waveReader = new NAudio.Wave.WaveFileReader（fileName）;”在我的“playSound”功能中：

public void PlaySound (int deviceNumber)
{
disposeWave ();// stop previous sounds Before Starting
waveReader = new NAudio.Wave.WaveFileReader (fileName);
var waveOut NAudio.Wave.WaveOut = new ();
waveOut.DeviceNumber = deviceNumber;
var output = waveOut;
output.Init (waveReader);
output.Play ();
}

提前谢谢你。美好的一天：）

Answer 1

我相信你通过

完成了这项工作

System.Media.SoundPlayer Player = new System.Media.SoundPlayer(fileName)
Player.Play();

Answer 2

虽然我不能给你一个“Ready To Go”解决方案，但我建议你在错误行上设置一个断点，并检查“fileName”的值。如果它是正确的路径，那么您使用该路径的方式是错误的。如果路径错误，则需要在尝试播放波形之前修复路径提取方式。

编辑1＆amp; 2合并：

public partial class MyForm : Form
{
    #region Fields & Properties
    Dictionary<int, string> _soundFilepaths;
    #endregion

    #region Constructor & Destructor
    public MyForm()
    {
        InitializeComponent();
        this.EnableSounds();
    }
    #endregion

    #region Events
    private void playSound1_Click(object sender, EventArgs e)
    {
        this.PlaySound(0, 1);
    }

    private void playSound2_Click(object sender, EventArgs e)
    {
        this.PlaySound(0, 2);
    }
    #endregion

    #region Methods
    private void EnableSounds()
    {
        Dictionary<int, string> soundPaths = new Dictionary<int, string>();
        string commandString = "select code_alarme, chemin from alarme";

        using (OdbcConnection conn = new OdbcConnection("DSN=cp1"))
        {
            using (OdbcCommand cmd = new OdbcCommand(commandString, conn))
            {
                cmd.CommandTimeout = 60;
                conn.Open();

                using (OdbcDataReader dr = cmd.ExecuteReader())
                {
                    while (dr.Read())
                    {
                        soundPaths.Add(int.Parse(dr[0].ToString()), dr[1].ToString());
                    }
                }
            }
        }

        this._soundFilepaths = soundPaths;
    }

    private void PlaySound(int deviceID, int soundID)
    {
        // I don't have the NAudio library so I can't check if it works or no though.
        disposeWave();
        NAudio.Wave.WaveFileReader waveReader = new NAudio.Wave.WaveFileReader(this._soundFilepaths[soundID]);
        var waveOut = new NAudio.Wave.WaveOut();
        waveOut.DeviceNumber = deviceNumber;
        var output = waveOut;
        output.Init(waveReader);
        output.Play();
    }
    #endregion
}

Answer 3

cmd1.ToString ();

这看起来很错误。 IDBCommand公开了ExecuteRead()或ExecuteScalar()等方法。

ToString()的默认实现是输出类型名称。除非你的工作目录中有一个名为“ System.Data.OdbcCommand ”的文件，否则你不会听到太多，我恐怕......

如何播放存储在数据库Access中的声音文件

3 个答案: