Getting Started with Rich Text Editor in Blazor

7 Oct 202517 minutes to read

This guide explains how to add the Blazor Rich Text Editor component to a Blazor WebAssembly app using Visual Studio, Visual Studio Code, and the .NET CLI.

NOTE

Explore the Blazor Rich Text Editor demo to learn how to render and configure the editor tools.

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To get started quickly with the Blazor Rich Text Editor, see the Getting Started sample on GitHub.

Prerequisites

System requirements for Blazor components

Create a new Blazor App in Visual Studio

Create a Blazor WebAssembly App in Visual Studio using Microsoft Templates or the Syncfusion^® Blazor Extension. For detailed instructions, see the Blazor WebAssembly getting started documentation.

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

To add the Blazor Rich Text Editor component, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), then search and install Syncfusion.Blazor.RichTextEditor and Syncfusion.Blazor.Themes. Alternatively, run the following Package Manager commands:

Package Manager
Install-Package Syncfusion.Blazor.RichTextEditor -Version 31.2.2
Install-Package Syncfusion.Blazor.Themes -Version 31.2.2

NOTE

Syncfusion^® Blazor components are available in nuget.org. Refer to NuGet packages topic for the list of available packages and component details.

Prerequisites

System requirements for Blazor components

Create a new Blazor App in Visual Studio Code

Create a Blazor WebAssembly App in Visual Studio Code using Microsoft Templates or the Syncfusion^® Blazor Extension. For detailed instructions, see the Blazor WebAssembly getting started documentation.

Alternatively, create a WebAssembly application using the following commands in the integrated terminal(Ctrl+`).

Blazor WASM App
dotnet new blazorwasm -o BlazorApp
cd BlazorApp

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Press Ctrl+` to open the integrated terminal in Visual Studio Code.
Ensure the current directory contains your .csproj file.
Run the following commands to install Syncfusion.Blazor.RichTextEditor and Syncfusion.Blazor.Themes, and restore dependencies.

Package Manager
dotnet add package Syncfusion.Blazor.RichTextEditor -v 31.2.2
dotnet add package Syncfusion.Blazor.Themes -v 31.2.2
dotnet restore

NOTE

Syncfusion^® Blazor components are available in nuget.org. Refer to NuGet packages topic for the list of available packages and component details.

Prerequisites

Install the latest version of the .NET SDK. If the SDK is already installed, verify the version by running the following command in a command prompt (Windows), terminal (macOS), or shell (Linux).

.NET CLI
dotnet --version

Create a Blazor WebAssembly App using .NET CLI

Run the dotnet new blazorwasm command to create a new Blazor WebAssembly app in a command prompt (Windows) or terminal (macOS) or shell (Linux).

.NET CLI
dotnet new blazorwasm -o BlazorApp
cd BlazorApp

This command creates a new Blazor WebAssembly app in a directory named BlazorApp at the current location. See Create a Blazor app and the dotnet new CLI command for more details.

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Use the following commands to add the Blazor Rich Text Editor component to the application by installing Syncfusion.Blazor.RichTextEditor and Syncfusion.Blazor.Themes. For details, see Install and manage packages using the dotnet CLI.

.NET CLI
dotnet add package Syncfusion.Blazor.RichTextEditor -Version 31.2.2
dotnet add package Syncfusion.Blazor.Themes -Version 31.2.2
dotnet restore

NOTE

Syncfusion^® Blazor components are available in nuget.org. Refer to NuGet packages topic for the list of available packages and component details.

Add import namespaces

Open the ~/_Imports.razor file and import the Syncfusion.Blazor and Syncfusion.Blazor.RichTextEditor namespace.

~/_Imports.razor

@using Syncfusion.Blazor
@using Syncfusion.Blazor.RichTextEditor

Register Syncfusion^® Blazor service

~/Program.cs
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 stylesheet and script resources

The theme stylesheet and script are available via NuGet using Static Web Assets. Add the stylesheet and script references in the <head> section of the ~/index.html file.

<head>
    ....
    <link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
    <script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>

    //Blazor RichTextEditor Component script reference.
    <!-- <script src="_content/Syncfusion.Blazor.RichTextEditor/scripts/sf-richtexteditor.min.js" type="text/javascript"></script> -->
</head>

NOTE

Check out the Blazor Themes topic to discover various methods (Static Web Assets, CDN, and CRG) for referencing themes in your Blazor application. Also, check out the Adding Script Reference topic to learn different approaches for adding script references in your Blazor application.

Add Blazor Rich Text Editor component

Add the Syncfusion^® Blazor Rich Text Editor component in the ~/Pages/Index.razor file.

RAZOR
<SfRichTextEditor>
    <p>Rich Text Editor allows to insert images from online source as well as local computer where you want to insert the image in your content.</p>
    <p><b>Get started Quick Toolbar to click on the image</b></p>
    <p>It is possible to add custom style on the selected image inside the Rich Text Editor through quick toolbar.</p>
</SfRichTextEditor>

Press Ctrl+F5 (Windows) or ⌘+F5 (macOS) to launch the application. This will render the Syncfusion^® Blazor Rich Text Editor component in your default web browser.

Configure the toolbar with the tools using RichTextEditorToolbarSettings.Items property as your application requires.

RAZOR
<SfRichTextEditor>
    <RichTextEditorToolbarSettings Items="@Tools" />
    <p>The Rich Text Editor component is WYSIWYG ('what you see is what you get') editor that provides the best user experience to create and update the content. Users can format their content using standard toolbar commands.</p>
    <p><b> Key features:</b></p>
    <ul>
        <li><p> Provides <b>IFRAME</b> and <b>DIV</b> modes </p></li>
        <li><p> Capable of handling markdown editing.</p></li>
        <li><p> Contains a modular library to load the necessary functionality on demand.</p></li>
        <li><p> Provides a fully customizable toolbar.</p></li>
        <li><p> Provides HTML view to edit the source directly for developers.</p></li>
        <li><p> Supports third - party library integration.</p></li>
        <li><p> Allows preview of modified content before saving it.</p></li>
    </ul>
</SfRichTextEditor>

@code {
    private List<ToolbarItemModel> Tools = new List<ToolbarItemModel>()
    {
        new ToolbarItemModel() { Command = ToolbarCommand.Bold },
        new ToolbarItemModel() { Command = ToolbarCommand.Italic },
        new ToolbarItemModel() { Command = ToolbarCommand.Underline },
        new ToolbarItemModel() { Command = ToolbarCommand.StrikeThrough },
        new ToolbarItemModel() { Command = ToolbarCommand.FontName },
        new ToolbarItemModel() { Command = ToolbarCommand.FontSize },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.FontColor },
        new ToolbarItemModel() { Command = ToolbarCommand.BackgroundColor },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.Formats },
        new ToolbarItemModel() { Command = ToolbarCommand.Alignments },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.LowerCase },
        new ToolbarItemModel() { Command = ToolbarCommand.UpperCase },
        new ToolbarItemModel() { Command = ToolbarCommand.SuperScript },
        new ToolbarItemModel() { Command = ToolbarCommand.SubScript },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.OrderedList },
        new ToolbarItemModel() { Command = ToolbarCommand.UnorderedList },
        new ToolbarItemModel() { Command = ToolbarCommand.Outdent },
        new ToolbarItemModel() { Command = ToolbarCommand.Indent },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.CreateLink },
        new ToolbarItemModel() { Command = ToolbarCommand.Image },
        new ToolbarItemModel() { Command = ToolbarCommand.CreateTable },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.ClearFormat },
        new ToolbarItemModel() { Command = ToolbarCommand.Print },
        new ToolbarItemModel() { Command = ToolbarCommand.SourceCode },
        new ToolbarItemModel() { Command = ToolbarCommand.FullScreen },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.Undo },
        new ToolbarItemModel() { Command = ToolbarCommand.Redo }
    };
}

Insert images and links

The Image tool inserts an image into the Rich Text Editor content area, and the Link tool applies hyperlinks (such as website URLs) to the selected text.

Specify quick toolbar items for target elements such as images, links, and tables. The quick toolbar opens when clicking the target element, allowing customization of that element.

RAZOR
<SfRichTextEditor>
    <RichTextEditorToolbarSettings Items="@Tools" />
    <RichTextEditorQuickToolbarSettings Image="@Image" Link="@Link" />
    <p>Rich Text Editor allows to insert images from online source as well as local computer where you want to insert the image in your content.</p>
    <p><b>Get started Quick Toolbar to click on the image</b></p>
    <p>It is possible to add custom style on the selected image inside the Rich Text Editor through quick toolbar.</p>
    <img alt='Logo' style='width: 300px; height: 300px; transform: rotate(0deg);' src='https://cdn.syncfusion.com/ej2/richtexteditor-resources/RTE-Portrait.png' />
</SfRichTextEditor>

@code {
    private List<ToolbarItemModel> Tools = new List<ToolbarItemModel>()
    {
        new ToolbarItemModel() { Command = ToolbarCommand.Bold },
        new ToolbarItemModel() { Command = ToolbarCommand.Italic },
        new ToolbarItemModel() { Command = ToolbarCommand.Underline },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.Formats },
        new ToolbarItemModel() { Command = ToolbarCommand.Alignments },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.CreateLink },
        new ToolbarItemModel() { Command = ToolbarCommand.Image },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.SourceCode },
        new ToolbarItemModel() { Command = ToolbarCommand.Separator },
        new ToolbarItemModel() { Command = ToolbarCommand.Undo },
        new ToolbarItemModel() { Command = ToolbarCommand.Redo }
    };
    private List<ImageToolbarItemModel> Image = new List<ImageToolbarItemModel>()
    {
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.Replace },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.Align },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.Caption },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.Remove },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.OpenImageLink },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.HorizontalSeparator },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.EditImageLink },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.RemoveImageLink },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.Display },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.AltText },
        new ImageToolbarItemModel() { Command = ImageToolbarCommand.Dimension }
    };
    private List<LinkToolbarItemModel> Link = new List<LinkToolbarItemModel>()
    {
        new LinkToolbarItemModel() { Command = LinkToolbarCommand.Open },
        new LinkToolbarItemModel() { Command = LinkToolbarCommand.Edit },
        new LinkToolbarItemModel() { Command = LinkToolbarCommand.UnLink }
    };
}

Retrieve the formatted content

To retrieve the editor contents in HTML format, use the Value property of Rich Text Editor, and to fetch the editor content as plain text, use the GetText method of Rich Text Editor.

RAZOR
@using Syncfusion.Blazor.Buttons
@using Syncfusion.Blazor.RichTextEditor
@using Syncfusion.Blazor.Popups

<SfButton @onclick="@GetValue">Get Value</SfButton>
<SfButton @onclick="@GetText">Get Text</SfButton>

<br />
<SfDialog @ref="DialogObj" @bind-Visible="@Visibility" Content="@Content" Header="@Header" Target="#target" Height="200px"
          Width="400px" ShowCloseIcon="true">
    <DialogButtons>
        <DialogButton Content="Ok" IsPrimary="true" OnClick="@DlgButtonClick" />
    </DialogButtons>

</SfDialog>
<SfRichTextEditor @ref="RteObj" Value="@RteValue" />

@code {
    SfRichTextEditor RteObj;
    SfDialog DialogObj;
    private string Content;
    private bool Visibility = false;
    private string Header = "Rich Text Editor's Value";
    private string RteValue = @"<p>Rich Text Editor allows to insert images from online source as well as local computer where you want to insert the image in your content.</p><p><b>Get started Quick Toolbar to click on the image</b></p><p>It is possible to add custom style on the selected image inside the Rich Text Editor through quick toolbar.</p><img alt='Logo' style='width: 300px; height: 300px; transform: rotate(0deg);' src='https://cdn.syncfusion.com/ej2/richtexteditor-resources/RTE-Portrait.png' />";
    private async Task GetValue()
    {
        this.Content = this.RteValue;
        await this.DialogObj.ShowAsync();
    }
    private async Task GetText()
    {
        this.Content = await this.RteObj.GetTextAsync();
        this.DialogObj.ShowAsync();
    }
    private async Task DlgButtonClick(object arg)
    {
        await this.DialogObj.HideAsync();
    }
}

Retrieve the number of characters

To retrieve the number of characters in the Rich Text Editor content, use the GetCharCount method of the Rich Text Editor.

RAZOR
@using Syncfusion.Blazor.Buttons
@using Syncfusion.Blazor.RichTextEditor
@using Syncfusion.Blazor.Popups

<SfButton @onclick="@GetCharCount">Get Char Count</SfButton>

<br />
<SfDialog @ref="DialogObj" @bind-Visible="@Visibility" Content="@Content" Header="@Header" Target="#target" Height="200px"
          Width="400px" ShowCloseIcon="true">
    <DialogButtons>
        <DialogButton Content="Ok" IsPrimary="true" OnClick="@DlgButtonClick" />
    </DialogButtons>

</SfDialog>
<SfRichTextEditor @ref="RteObj" />

@code {
    SfRichTextEditor RteObj;
    SfDialog DialogObj;
    private string Content;
    private bool Visibility = false;
    private string Header = "Rich Text Editor's Value";
    private string RteValue = @"<p>Rich Text Editor allows to insert images from online source as well as local computer where you want to insert the image in your content.</p><p><b>Get started Quick Toolbar to click on the image</b></p><p>It is possible to add custom style on the selected image inside the Rich Text Editor through quick toolbar.</p><img alt='Logo' style='width: 300px; height: 300px; transform: rotate(0deg);' src='https://cdn.syncfusion.com/ej2/richtexteditor-resources/RTE-Portrait.png' />";
    private async Task GetCharCount()
    {
        double charCount = await this.RteObj.GetCharCountAsync();
        this.Content = charCount.ToString(); // Convert double to string
        await this.DialogObj.ShowAsync();
    }
    private async Task DlgButtonClick(object arg)
    {
        await this.DialogObj.HideAsync();
    }
}

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Getting Started with Rich Text Editor in Blazor

Prerequisites

Create a new Blazor App in Visual Studio

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Prerequisites

Create a new Blazor App in Visual Studio Code

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Prerequisites

Create a Blazor WebAssembly App using .NET CLI

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Add import namespaces

Register Syncfusion^® Blazor service

Add stylesheet and script resources

Add Blazor Rich Text Editor component

Insert images and links

Retrieve the formatted content

Retrieve the number of characters

See also

Getting Started with Rich Text Editor in Blazor

Prerequisites

Create a new Blazor App in Visual Studio

Install Syncfusion® Blazor Rich Text Editor and Themes NuGet packages

Prerequisites

Create a new Blazor App in Visual Studio Code

Install Syncfusion® Blazor Rich Text Editor and Themes NuGet packages

Prerequisites

Create a Blazor WebAssembly App using .NET CLI

Install Syncfusion® Blazor Rich Text Editor and Themes NuGet packages

Add import namespaces

Register Syncfusion® Blazor service

Add stylesheet and script resources

Add Blazor Rich Text Editor component

Configure the toolbar

Insert images and links

Retrieve the formatted content

Retrieve the number of characters

See also

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Install Syncfusion^® Blazor Rich Text Editor and Themes NuGet packages

Register Syncfusion^® Blazor service