I can't seem to find any solutions to my problem anywhere.
I am trying to use SpeechSynthesizer in my application but anything that I try (including code from the Microsoft documentation) but nothing seems to work. The code that I am using is:
using (SpeechSynthesizer synth = new SpeechSynthesizer())
{
// Configure the audio output.
synth.SetOutputToDefaultAudioDevice();
// Speak a string synchronously.
synth.Speak("test");
}
I am using the following namespaces
using System;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Threading;
using Process = System.Diagnostics.Process;
using System.Speech.Recognition;
using System.Media;
using System.IO;
using System.Speech.Synthesis;
I got the code from the Microsoft .NET documentation here: LINK
The code throws a System.NullReferenceException at synth.SetOutputToDefaultAudioDevice();
and when I comment the line out it throws it here too synth.Speak("test");
The stack trace says that it is from the System.Speech dll or at least I think it is anyway; I'm not sure. A link to the stack trace is:
at System.Speech.Internal.ObjectTokens.RegistryDataKey.HKEYfromRegKey(RegistryKey regKey)
at System.Speech.Internal.ObjectTokens.RegistryDataKey.RootHKEYFromRegPath(String rootPath)
at System.Speech.Internal.ObjectTokens.RegistryDataKey.Open(String registryPath, Boolean fCreateIfNotExist)
at System.Speech.Internal.ObjectTokens.ObjectTokenCategory.Create(String sCategoryId)
at System.Speech.Internal.ObjectTokens.SAPICategories.DefaultDeviceOut()
at System.Speech.Internal.Synthesis.VoiceSynthesis..ctor(WeakReference speechSynthesizer)
at System.Speech.Synthesis.SpeechSynthesizer.get_VoiceSynthesizer()
at System.Speech.Synthesis.SpeechSynthesizer.get_Voice()
at SampleSynthesis.Program.Main(String[] args) in C:\Users\Sonic\Desktop\test\Program.cs:line 26
There appear to be other questions that are related to this, and so my question does not appear to be a simple duplicate of other NRE related questions. Here are some similar questions that may help provide an answer:
It took a while but I found an answer. I didn't have System.Speech installed in the Manage NuGet Packages section. I just added the DLL from
Add a project reference
but it was not installed so it was throwing the NullReferenceException. For anyone else who has this problem you must install the NuGet package by going toProject > Manage NuGet Packages > Browse
then searchSystem.Speech
in the search bar, click on the package with the .NET icon and press Install.Also thanks for everyone who tried to help :)