In our first MediaPlayer example, we just opened and automatically started playing a file, without giving the user a chance to control the playback Instead, you can use the MediaOpened and MediaFailed events to act when things go The Open() and Play() methods actually doesn't throw any exceptions. Please also notice that no exception handling is done for this example, as usual to keep the example as compact as possible, but in this case also because The object is not prematurely garbage collected because it goes out of scope once the event handler is done, which would result in the playback stopping. Notice that the MediaPlayer object is created outside of the event handler. Once that is done, it will use the alreadyĬreated MediaPlayer instance to open and play this file. In this example, we just have a single button, which will show an OpenFileDialog and let you select an MP3 file. MediaPlayer.Open(new Uri(openFileDialog.FileName)) OpenFileDialog openFileDialog = new OpenFileDialog() Private void btnOpenAudioFile_Click(object sender, RoutedEventArgs e) Private MediaPlayer mediaPlayer = new MediaPlayer() Public partial class MediaPlayerAudioSample : Window Playing an MP3 file with the MediaPlayer class is very simple, as we'll see in this next example: We'll be using it for playing just audio, and then focus on video in the next article. The MediaPlayer class uses Windows Media Player technology to play both audio and video in several modern formats, e.g. In that case, it's a good thing that yourĪpplication will respect the user's choice of silence. Same way that Windows does, it makes it extremely easy to produce a sound for warnings, questions etc. On the other hand, if you only want to use these sounds the Have disabled them in Windows, in which case the expected sound will be replaced with silence. First of all, you only get access to these five sounds, and second of all, the user may There are of course several limitations to using this approach. Private void btnQuestion_Click(object sender, RoutedEventArgs e) Private void btnHand_Click(object sender, RoutedEventArgs e) Private void btnExclamation_Click(object sender, RoutedEventArgs e) Private void btnBeep_Click(object sender, RoutedEventArgs e) Private void btnAsterisk_Click(object sender, RoutedEventArgs e) Public partial class SystemSoundsSample : Window Namespace WpfTutorialSamples.Audio_and_Video Here's a complete example, where we use all of the currently available sounds: You can piggyback on these sounds and settings and play them with a single line of code: () The SystemSounds class offers several different sounds, which corresponds to the sound defined for this event by the user in Windows, like Exclamation and WPF application - the SystemSounds class. Instead, we'll be focusing on the MediaPlayer and MediaElement classes, which allows the playback of MP3 files, but first, let's have a look at the simplest way of playing a sound in your So while the SoundPlayer class is simple to use, it's not terribly useful. Today, mainly because it's uncompressed and therefore takes up a LOT of space. WPF has a class called SoundPlayer, which will play audio content based on the WAV format for you. in the MP3 format, but first, let's have a look at couple of simplerĪpproaches. In this particular article, we'llīe discussing the ability to play audio, coming from actual audio files, e.g. Then edit the second action - sending an e-mail - by selecting c:\script\query.txt as an attachment to the letter.WPF comes with excellent built-in audio and video support, as you'll see in the next couple of chapters of this tutorial. Then you need to change the order of the actions, move it to the top of the list using arrow buttons on the right. In Actions tab, add a new action - start script query.cmd. Now you only have to open the settings of the trigger created earlier in Task Scheduler. Wevtutil qe Security /q:"*]" /f:text /rd:true /c:1 > c:\script\query.txt ![]() Make a script (query.cmd) consisting of two lines: the first one deletes the last log file, and the second gets the last event from the log and saves it to the log file: Wevtutil qe Security /q:"*]" /f:text /rd:true /c:1 So, to get information about the last 4740 event from Security log, you have to run the following: ![]() A utility wevtutil can be used to obtain information about any event from Windows logs. Let’s try to attach the data from the event log to the e-mail. ![]() This notification is not very informative, and to view an event details you have to open Event Viewer.
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