C# System.InvalidOperationException错误
我正在尝试制作一个带有录音功能的音板应用程序,但我遇到了一个System.InvalidOperationException,当我单击“录音”时,由于某种原因,我的声音无法播放 Animals.xaml:C# System.InvalidOperationException错误,c#,wpf,xaml,windows-phone-8,C#,Wpf,Xaml,Windows Phone 8,我正在尝试制作一个带有录音功能的音板应用程序,但我遇到了一个System.InvalidOperationException,当我单击“录音”时,由于某种原因,我的声音无法播放 Animals.xaml: <phone:PhoneApplicationPage x:Class="SoundBoard.Animals" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="
<phone:PhoneApplicationPage
x:Class="SoundBoard.Animals"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DataContext="{d:DesignData SampleData/SampleData.xaml}"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">
<phone:PhoneApplicationPage.Resources>
<Storyboard x:Name="RotateCirlce" RepeatBehavior="Forever">
<DoubleAnimation
Duration="0:0:4"
To="360"
Storyboard.TargetProperty="(UIElement.RenderTransfrom).(CompositeTransform.Rotation)"
Storyboard.TargetName="ReelGrid"
d:IsOptimized="True" />
</Storyboard>
</phone:PhoneApplicationPage.Resources>
<!--LayoutRoot contains the root grid where all other page content is placed-->
<Grid x:Name="LayoutRoot">
<phone:Panorama Title="{Binding Path=LocalizedResources.ApplicationTitle,
Source={StaticResource LocalizedStrings}}">
<!--Panorama item one-->
<phone:PanoramaItem Header="Animals">
<Grid>
<Image HorizontalAlignment="Left" Height="463" Margin="10,10,0,0" VerticalAlignment="Top" Width="400" Source="/Assets/cat.jpg"/>
</Grid>
</phone:PanoramaItem>
<!--Panorama item two-->
<phone:PanoramaItem Header="Sounds">
<phone:LongListSelector
Margin="0,0,-12,0"
ItemsSource="{Binding Animals.Items}"
LayoutMode="Grid"
GridCellSize="150,150"
>
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<Grid Background="{StaticResource PhoneAccentBrush}">
<Grid VerticalAlignment="Top" HorizontalAlignment="Right"
Width="40" Height="40" Margin="0,6,6,0">
<Ellipse Stroke="{StaticResource PhoneForegroundBrush}"
StrokeThickness="3" />
<Image Source="Assets/AppBar/Play.png" />
</Grid>
<StackPanel VerticalAlignment="Bottom">
<TextBlock Text="{Binding Title}"
Margin="6,0,0,6"/>
</StackPanel>
</Grid>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
</phone:PanoramaItem>
<!--Panorama item three-->
<phone:PanoramaItem Header="Record">
<Grid>
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<MediaElement x:Name="AudioPlayer" AutoPlay="False" />
<StackPanel>
<ToggleButton Content="Record"
Checked="RecordAudioChecked"
Unchecked="RecordAudioUnchecked"/>
<Grid Width="200"
Height="200"
Name="ReelGrid"
RenderTransformOrigin=".5,.5">
<Grid.RenderTransform>
<CompositeTransform />
</Grid.RenderTransform>
<Ellipse Fill="{StaticResource PhoneAccentBrush}" />
<Ellipse Height="20"
Width="20"
Fill="{StaticResource PhoneForegroundBrush}" />
<Rectangle Height="20"
Width="20"
Margin="0,20,0,20"
VerticalAlignment="Top"
Fill="{StaticResource PhoneForegroundBrush}" />
<Rectangle Height="20"
Width="20"
Margin="0,20,0,20"
VerticalAlignment="Bottom"
Fill="{StaticResource PhoneForegroundBrush}" />
<Rectangle Height="20"
Width="20"
Margin="0,0,20,0"
HorizontalAlignment="Right"
Fill="{StaticResource PhoneForegroundBrush}" />
<Rectangle Height="20"
Width="20"
Margin="20,0,0,0"
HorizontalAlignment="Left"
Fill="{StaticResource PhoneForegroundBrush}" />
</Grid>
<Button Name="PlayAudio" Content="Play" Click="PlayAudioClick" />
</StackPanel>
</Grid>
</Grid>
</phone:PanoramaItem>
</phone:Panorama>
</Grid>
</phone:PhoneApplicationPage>
和anists.xaml.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Navigation;
using System.Windows.Resources;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using SoundBoard.Resources;
using Coding4Fun.Toolkit.Audio;
using Coding4Fun.Toolkit.Audio.Helpers;
using System.IO;
using System.IO.IsolatedStorage;
using Coding4Fun.Toolkit.Controls;
using SoundBoard.ViewModels;
using Newtonsoft.Json;
using System.Windows.Media.Animation;
namespace SoundBoard
{
public partial class Animals : PhoneApplicationPage
{
private MicrophoneRecorder _recorder = new MicrophoneRecorder();
private IsolatedStorageFileStream _audioStream;
private string _tempFileName = "tempWav.wav";
public Animals()
{
InitializeComponent();
DataContext = App.ViewModel;
BuildLocalizedApplicationBar();
}
// Load data for the ViewModel Items
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (!App.ViewModel.IsDataLoaded)
{
App.ViewModel.LoadData();
}
}
private void LongListSelector_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
LongListSelector selector = sender as LongListSelector;
// verifying our sender is actually a LongListSelector
if (selector == null)
return;
SoundData data = selector.SelectedItem as SoundData;
// verifying our sender is actually SoundData
if (data == null)
return;
if (File.Exists(data.FilePath))
{
AudioPlayer.Source = new Uri(data.FilePath, UriKind.RelativeOrAbsolute);
}
else
{
using (var storageFolder = IsolatedStorageFile.GetUserStoreForApplication())
{
using (var stream = new IsolatedStorageFileStream(data.FilePath, FileMode.Open, storageFolder))
{
AudioPlayer.SetSource(stream);
}
}
}
selector.SelectedItem = null;
}
private void BuildLocalizedApplicationBar()
{
ApplicationBar = new ApplicationBar();
ApplicationBarIconButton recordAudioAppBar =
new ApplicationBarIconButton();
recordAudioAppBar.IconUri = new Uri("/Assets/AppBar/Save.png", UriKind.Relative);
recordAudioAppBar.Text = AppResources.AppBarSave;
recordAudioAppBar.Click += recordAudioAppBar_Click;
ApplicationBar.Buttons.Add(recordAudioAppBar);
ApplicationBar.IsVisible = false;
}
void recordAudioAppBar_Click(object sender, EventArgs e)
{
InputPrompt fileName = new InputPrompt();
fileName.Message = "What should we call the sound?";
fileName.Completed += FileNameCompleted;
fileName.Show();
}
private void FileNameCompleted(object sender, PopUpEventArgs<string, PopUpResult> e)
{
if (e.PopUpResult == PopUpResult.Ok)
{
// Create a sound data object
SoundData soundData = new SoundData();
soundData.FilePath = string.Format("/customAudio/{0}.wav", DateTime.Now.ToFileTime());
soundData.Title = e.Result;
// Save the wav file into the DIR /customAudio/
using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
if (!isoStore.DirectoryExists("/customAudio/"))
isoStore.CreateDirectory("/customAudio/");
isoStore.MoveFile(_tempFileName, soundData.FilePath);
}
// Add the SoundData to App.ViewModel.CustomSounds
App.ViewModel.CustomSounds.Items.Add(soundData);
// Save the list of CustomSounds to isolatedStorage.ApplicationSettings
var data = JsonConvert.SerializeObject(App.ViewModel.CustomSounds);
IsolatedStorageSettings.ApplicationSettings[SoundModel.CustomSoundKey] = data;
IsolatedStorageSettings.ApplicationSettings.Save();
// We'll need to modify sound model to retrieve CustomSounds
//from isolatedStorage.ApplicationSettings
NavigationService.Navigate(new Uri("", UriKind.RelativeOrAbsolute));
}
}
private void RecordAudioChecked(object sender, RoutedEventArgs e)
{
PlayAudio.IsEnabled = false;
ApplicationBar.IsVisible = false;
RotateCirlce.Begin();
_recorder.Start();
}
private void RecordAudioUnchecked(object sender, RoutedEventArgs e)
{
_recorder.Stop();
SaveTempAudio(_recorder.Buffer);
RotateCirlce.Stop();
PlayAudio.IsEnabled = true;
ApplicationBar.IsVisible = true;
}
private void SaveTempAudio(MemoryStream buffer)
{
//defensive...
if (buffer == null)
throw new ArgumentNullException("Attempting a save on empty sound buffer.");
//Clean out hold on audioStream
if (_audioStream != null)
{
AudioPlayer.Stop();
AudioPlayer.Source = null;
_audioStream.Dispose();
}
var bytes = buffer.GetWavAsByteArray(_recorder.SampleRate);
using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
if (isoStore.FileExists(_tempFileName))
isoStore.DeleteFile(_tempFileName);
_tempFileName = string.Format("{0}.wav", DateTime.Now.ToFileTime());
_audioStream = isoStore.CreateFile(_tempFileName);
_audioStream.Write(bytes, 0, bytes.Length);
//Play ... SetSource of a mediaElement
AudioPlayer.SetSource(_audioStream);
}
}
private void PlayAudioClick(object sender, RoutedEventArgs e)
{
AudioPlayer.Play();
}
}
}
使用系统;
使用System.Collections.Generic;
使用System.Linq;
Net系统;
使用System.Windows;
使用System.Windows.Controls;
使用System.Windows.Media;
使用System.Windows.Navigation;
使用System.Windows.Resources;
使用Microsoft.Phone.Controls;
使用Microsoft.Phone.Shell;
使用音板资源;
使用Coding4Fun.Toolkit.Audio;
使用Coding4Fun.Toolkit.Audio.Helpers;
使用System.IO;
使用System.IO.IsolatedStorage;
使用Coding4Fun.Toolkit.Controls;
使用SoundBoard.ViewModels;
使用Newtonsoft.Json;
使用System.Windows.Media.Animation;
名称空间音板
{
公共部分类动物:PhoneApplicationPage
{
专用麦克风记事本_recorder=新麦克风记事本();
私有隔离存储文件流(audioStream);
私有字符串_tempFileName=“tempWav.wav”;
公共动物()
{
初始化组件();
DataContext=App.ViewModel;
BuildLocalizedApplicationBar();
}
//加载ViewModel项的数据
受保护的覆盖无效OnNavigatedTo(NavigationEventArgs e)
{
如果(!App.ViewModel.IsDataLoaded)
{
App.ViewModel.LoadData();
}
}
私有void LongListSelector_SelectionChanged(对象发送方,SelectionChangedEventArgs e)
{
LongListSelector=发送方作为LongListSelector;
//验证我们的发件人实际上是一个长列表选择器
if(选择器==null)
返回;
SoundData data=selector.SelectedItem作为SoundData;
//验证我们的发送者实际上是可靠的数据
如果(数据==null)
返回;
if(File.Exists(data.FilePath))
{
AudioPlayer.Source=新Uri(data.FilePath,UriKind.RelativeOrAbsolute);
}
其他的
{
使用(var storageFolder=IsolatedStorageFile.GetUserStoreForApplication())
{
使用(var stream=new-IsolatedStorageFileStream(data.FilePath,FileMode.Open,storageFolder))
{
AudioPlayer.SetSource(流);
}
}
}
selector.SelectedItem=null;
}
私有void BuildLocalizedApplicationBar()
{
ApplicationBar=新的ApplicationBar();
ApplicationBarIconButton录制音频应用程序栏=
新应用程序BariconButton();
recordAudioAppBar.IconUri=新Uri(“/Assets/AppBar/Save.png”,UriKind.Relative);
recordAudioAppBar.Text=AppResources.AppBarSave;
recordAudioAppBar.单击+=recordAudioAppBar\u单击;
ApplicationBar.Buttons.Add(recordAudioAppBar);
ApplicationBar.IsVisible=false;
}
void recordAudioAppBar_单击(对象发送者,事件参数e)
{
InputPrompt文件名=新的InputPrompt();
fileName.Message=“我们应该如何称呼声音?”;
fileName.Completed+=FileNameCompleted;
fileName.Show();
}
私有无效文件名已完成(对象发送方,PopUpEventArgs e)
{
如果(e.PopUpResult==PopUpResult.Ok)
{
//创建声音数据对象
SoundData SoundData=新的SoundData();
soundData.FilePath=string.Format(“/customAudio/{0}.wav”,DateTime.Now.ToFileTime());
soundData.Title=e.结果;
//将wav文件保存到DIR/customAudio中/
使用(IsolatedStorageFile isoStore=IsolatedStorageFile.GetUserStoreForApplication())
{
如果(!isoStore.directory存在(“/customAudio/”)
创建目录(“/customAudio/”);
isoStore.MoveFile(_tempFileName,soundData.FilePath);
}
//将声音数据添加到App.ViewModel.CustomSounds
App.ViewModel.CustomSounds.Items.Add(soundData);
//将CustomSounds列表保存到isolatedStorage.ApplicationSettings
var data=JsonConvert.SerializeObject(App.ViewModel.CustomSounds);
IsolatedStorageSettings.ApplicationSettings[SoundModel.CustomSoundKey]=数据;
IsolatedStorageSettings.ApplicationSettings.Save();