我有一些代码（在WPF应用程序中），当将某些文本复制到剪贴板时，它将使用SpeechSynthesizer读出文本（我的所有代码都在本文的底部）。
但是以这种方式播放音频不允许我暂停，倒带或播放等。
所以我想我会用SpeechSynthesizer保存一个wav文件。然后使用MediaPlayer类，因为它很容易暂停，播放等。
但是，保存文件后，该文件无法在媒体播放器中播放。该文件很好，并且在我手动运行时可以完美运行。我想使用MediaPlayer，因为已经为它编写了一些代码。
更新
使用示例on this page，我可以播放wav文件。我不知道为什么文件没有在我的代码中运行？在上面的示例中，我知道他们正在使用媒体元素，并尝试在我的代码中没有影响。我不是只播放音频的视频，所以为什么要使用MediaPlayer。
这是我当前的所有代码。据我所知，正在保存文件，但媒体播放器无法播放任何文件，我的计算机上的音量已经很大。
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Interop;
using System.IO;
using System.Speech.Synthesis;
using System.Windows.Controls.Primitives;
using System.Windows.Threading;
namespace CSWPFClipboardViewer
{
/// <summary>
/// Main window of the application, also will be used to get clipboard messages.
/// </summary>
public partial class MainWindow : Window
{
#region Private fields
/// <summary>
/// Next clipboard viewer window
/// </summary>
private IntPtr hWndNextViewer;
/// <summary>
/// The <see cref="HwndSource"/> for this window.
/// </summary>
private HwndSource hWndSource;
private bool isViewing;
private MediaPlayer mePlayer = new MediaPlayer();
#endregion
public MainWindow()
{
InitializeComponent();
}
#region Clipboard viewer related methods
private void InitCBViewer()
{
WindowInteropHelper wih = new WindowInteropHelper(this);
hWndSource = HwndSource.FromHwnd(wih.Handle);
hWndSource.AddHook(this.WinProc); // start processing window messages
hWndNextViewer = Win32.SetClipboardViewer(hWndSource.Handle); // set this window as a viewer
isViewing = true;
}
private void CloseCBViewer()
{
// remove this window from the clipboard viewer chain
Win32.ChangeClipboardChain(hWndSource.Handle, hWndNextViewer);
hWndNextViewer = IntPtr.Zero;
hWndSource.RemoveHook(this.WinProc);
pnlContent.Children.Clear();
isViewing = false;
}
private void DrawContent()
{
pnlContent.Children.Clear();
if (Clipboard.ContainsText())
{
string path = @"C:\Users\MyPath\";
string fileName = "MyFile.wav";
// delete previous file if it exists
if (File.Exists(path + fileName))
File.Delete(path + fileName);
// we have some text in the clipboard.
TextBox tb = new TextBox();
tb.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
tb.FontSize = 24;
tb.Text = Clipboard.GetText();
tb.IsReadOnly = true;
tb.TextWrapping = TextWrapping.Wrap;
pnlContent.Children.Add(tb);
SpeechSynthesizer synthesizer = new SpeechSynthesizer();
synthesizer.Volume = 100; // 0...100
synthesizer.Rate = 3; // -10...10
//Asynchronous
synthesizer.SetOutputToWaveFile(path + fileName);
synthesizer.SpeakCompleted += new EventHandler<SpeakCompletedEventArgs>(synth_SpeakCompleted);
synthesizer.SpeakAsync(Clipboard.GetText());
}
else
{
Label lb = new Label();
lb.Content = "The type of the data in the clipboard is not supported by this sample.";
pnlContent.Children.Add(lb);
}
}
private IntPtr WinProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case Win32.WM_CHANGECBCHAIN:
if (wParam == hWndNextViewer)
{
// clipboard viewer chain changed, need to fix it.
hWndNextViewer = lParam;
}
else if (hWndNextViewer != IntPtr.Zero)
{
// pass the message to the next viewer.
Win32.SendMessage(hWndNextViewer, msg, wParam, lParam);
}
break;
case Win32.WM_DRAWCLIPBOARD:
// clipboard content changed
this.DrawContent();
// pass the message to the next viewer.
Win32.SendMessage(hWndNextViewer, msg, wParam, lParam);
break;
}
return IntPtr.Zero;
}
#endregion
#region Control event handlers
void synth_SpeakCompleted(object sender, SpeakCompletedEventArgs e)
{
string path = @"C:\Users\MyPath\";
string fileName = "MyFile.wav";
mePlayer.Open(new Uri(path + fileName));
mePlayer.Play();
}
private void btnSwitch_Click(object sender, RoutedEventArgs e)
{
// switching between start/stop viewing state
if (!isViewing)
{
this.InitCBViewer();
btnSwitch.Content = "Stop viewer";
}
else
{
this.CloseCBViewer();
btnSwitch.Content = "Start viewer";
}
}
private void btnClose_Click(object sender, RoutedEventArgs e)
{
this.Close();
}
private void Window_Closed(object sender, EventArgs e)
{
this.CloseCBViewer();
}
#endregion
}
}
C＃Win32
using System;
using System.Runtime.InteropServices;
namespace CSWPFClipboardViewer
{
/// <summary>
/// This static class holds the Win32 function declarations and constants needed by
/// this sample application.
/// </summary>
internal static class Win32
{
/// <summary>
/// The WM_DRAWCLIPBOARD message notifies a clipboard viewer window that
/// the content of the clipboard has changed.
/// </summary>
internal const int WM_DRAWCLIPBOARD = 0x0308;
/// <summary>
/// A clipboard viewer window receives the WM_CHANGECBCHAIN message when
/// another window is removing itself from the clipboard viewer chain.
/// </summary>
internal const int WM_CHANGECBCHAIN = 0x030D;
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
internal static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
internal static extern bool ChangeClipboardChain(IntPtr hWndRemove, IntPtr hWndNewNext);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
internal static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
}
}
XAML
<Window x:Class="CSWPFClipboardViewer.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
Title="Clipboard Viewer" Height="500" Width="640" Background="Black" Closed="Window_Closed">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Label Grid.Row="0" Foreground="White" Margin="6,0,6,0">Clipboard content:</Label>
<StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right">
<Button x:Name="btnSwitch" Width="90" Height="25" Content="Start viewer" Padding="3" Margin="6,6,6,6" Click="btnSwitch_Click" />
<Button x:Name="btnClose" Width="90" Height="25" Content="Close" Padding="3" Margin="6,6,6,6" Click="btnClose_Click" />
</StackPanel>
<DockPanel x:Name="pnlContent" Grid.Row="1" Background="White" Margin="6,6,6,6" LastChildFill="True"/>
</Grid>
答案 0 :(得分：6)
默认情况下，synthesizer.SpeakAsync将使用扬声器作为输出。您将输出设置为wave文件。如果现在调用synthesizer.SpeakAsync，则合成器将“说出” wave文件，在这种情况下意味着写入该文件。因此synthesizer.SpeakAsync将不播放任何声音。
有关更多指导，请参见示例here。
一旦创建了wav文件，您就可以使用媒体播放器将其打开。
synthesizer.SpeakAsync("Youre text goes here");
var pathUri = new Uri(path);
player.Open(pathUri.AbsoluteUri);
答案 1 :(得分：2)
当我尝试复制您的问题时，我发现了一些非常有趣的东西。令人惊讶的是，我遇到了同样的问题。为了对其进行调试，我探索了MediaPlayer api，并在代码中添加了MediaFailed事件处理程序。
令我惊讶的是，每次我播放某些内容时，都会调用处理程序并带有以下内部异常：
MILAVERR_INVALIDWMPVERSION (Exception from HRESULT: 0x88980507) 。
更多的谷歌搜索导致this post，该状态指出，由于少数国家/地区的反竞争政府政策，Windows 10缺少常见的媒体应用程序。
要解决此问题，您可以确保已安装WMP 10或更高版本，或者直接使用SoundPlayer。
private SoundPlayer player = new SoundPlayer();
player.SoundLocation = System.IO.Path.Combine(path, fileName);
player.Play();