Getting Started with Blazor SpeechToText in a Blazor WASM App
24 Dec 20257 minutes to read
This section explains how to add the Blazor SpeechToText component to a Blazor WebAssembly application using Visual Studio, Visual Studio Code, and the .NET CLI.
Prerequisites
Create a new Blazor App in Visual Studio
Create a Blazor WebAssembly App using Visual Studio via Microsoft Templates or the Syncfusion® Blazor Extension. For detailed instructions, refer to the Blazor WASM App Getting Started documentation.
Install Syncfusion® Blazor Inputs NuGet in the App
To add the Blazor SpeechToText component to the app, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), then search and install Syncfusion.Blazor.Inputs. Alternatively, run the following commands in the Package Manager Console to achieve the same.
Install-Package Syncfusion.Blazor.Inputs -Version 32.1.19NOTE
Syncfusion® Blazor components are available in nuget.org. Refer to the NuGet packages topic for the available NuGet packages list with component details.
Prerequisites
Create a new Blazor App in Visual Studio Code
Create a Blazor WebAssembly App using Visual Studio Code via Microsoft Templates or the Syncfusion® Blazor Extension. For detailed instructions, refer to the Blazor WASM App Getting Started documentation.
Alternatively, create a WebAssembly application by using the following command in the integrated terminal(Ctrl+`).
dotnet new blazorwasm -o BlazorApp
cd BlazorAppInstall Syncfusion® Blazor Inputs NuGet in the App
- Press Ctrl+` to open the integrated terminal in Visual Studio Code.
- Ensure in the project root directory where the
.csprojfile is located. - Run the following command to install the Syncfusion.Blazor.Inputs NuGet package and ensure all dependencies are installed.
dotnet add package Syncfusion.Blazor.Inputs -v 32.1.19
dotnet restoreNOTE
Syncfusion® Blazor components are available in nuget.org. Refer to the NuGet packages topic for the available NuGet packages list with component details.
Prerequisites
Install the latest version of .NET SDK. If the .NET SDK is already installed, determine the installed version by running the following command in a command prompt (Windows), terminal (macOS), or command shell (Linux).
dotnet --versionCreate a Blazor WebAssembly App using .NET CLI
Run the following command to create a new Blazor WebAssembly App in a command prompt (Windows) or terminal (macOS) or command shell (Linux). For detailed instructions, refer to this Blazor WASM App Getting Started documentation.
dotnet new blazorwasm -o BlazorApp
cd BlazorAppInstall Syncfusion® Blazor Inputs and Themes NuGet in the App
To add the Blazor SpeechToText component to the application, run the following commands in a command prompt (Windows), command shell (Linux), or terminal (macOS) to install the Syncfusion.Blazor.Inputs and Syncfusion.Blazor.Themes NuGet packages. See Install and manage packages using the dotnet CLI for more details.
dotnet add package Syncfusion.Blazor.Inputs -Version 32.1.19
dotnet add package Syncfusion.Blazor.Themes -Version 32.1.19
dotnet restoreNOTE
Syncfusion® Blazor components are available in nuget.org. Refer to the NuGet packages topic for the available NuGet packages list with component details.
Add Import Namespaces
Open the ~/_Imports.razor file and import the Syncfusion.Blazor and Syncfusion.Blazor.Inputs namespaces.
@using Syncfusion.Blazor
@using Syncfusion.Blazor.InputsRegister Syncfusion® Blazor Service
Register the Syncfusion® Blazor Service in the ~/Program.cs file of the Blazor WebAssembly App.
using Microsoft.AspNetCore.Components.Web;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
using Syncfusion.Blazor;
var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.RootComponents.Add<App>("#app");
builder.RootComponents.Add<HeadOutlet>("head::after");
builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
builder.Services.AddSyncfusionBlazor();
await builder.Build().RunAsync();
....Add script resources
The script can be accessed from NuGet through Static Web Assets. Include the script reference in the <head> section of the ~/index.html file.
<head>
....
<script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>
</head>NOTE
Check out the Adding Script Reference topic to learn different approaches for adding script references in the Blazor application.
Add Blazor SpeechToText component
Add the Syncfusion® Blazor SpeechToText component in the ~/Pages/Index.razor file.
@using Syncfusion.Blazor.Inputs
<div class="speechtext-container">
<SfSpeechToText @bind-Transcript="@transcript"></SfSpeechToText>
<SfTextArea RowCount="5" ColumnCount="50" @bind-Value="@transcript" ResizeMode="Resize.None" Placeholder="Transcribed text will be shown here..."></SfTextArea>
</div>
<style>
.speechtext-container {
margin: 50px auto;
gap: 20px;
display: flex;
flex-direction: column;
align-items: center;
}
</style>
@code {
string transcript = "";
}- Press Ctrl+F5 (Windows) or ⌘+F5 (macOS) to launch the application. This will render the Syncfusion® Blazor SpeechToText component in the default web browser.
The SpeechToText component requires an internet connection and a browser that supports the SpeechRecognition Web Speech API.
Add button content
Use the Text property to display the start listening text and StopStateText property to display the stop listening text by using the ButtonSettings property.
@using Syncfusion.Blazor.Inputs
<div class="speechtext-container">
<SfSpeechToText ButtonSettings="@buttonSettings" @bind-Transcript="@transcript"></SfSpeechToText>
<SfTextArea RowCount="5" ColumnCount="50" @bind-Value="@transcript" ResizeMode="Resize.None" Placeholder="Transcribed text will be shown here..."></SfTextArea>
</div>
<style>
.speechtext-container {
margin: 50px auto;
gap: 20px;
display: flex;
flex-direction: column;
align-items: center;
}
</style>
@code {
string transcript = "";
SpeechToTextButtonSettings buttonSettings = new SpeechToTextButtonSettings()
{
Text = "Start Listening", // Displays when idle
StopStateText = "Stop Listening" // Displays when speech recognition is active
};
}
