Connect to Auth0 Data from Blazor Apps

Blazor is a framework for developing modern, client-side web UIs using .NET technology. Instead of coding in JavaScript, developers can use the familiar C# language and .NET libraries to build app UIs.

The CData API Driver for ADO.NET can be used with standard ADO.NET interfaces, such as LINQ and Entity Framework, to interact with live Auth0 data. Since Blazor supports .NET Core, developers can use CData ADO.NET Providers in Blazor apps. In this article, we will guide you to build a simple Blazor app that talks to Auth0 using standard SQL queries.

Install the CData API Driver for ADO.NET

CData ADO.NET Providers allow users to access Auth0 just like they would access SQL Server, using simple SQL queries.

Install the Auth0 ADO.NET Data Provider from the CData website or from NuGet. Search NuGet for "Auth0 ADO.NET Data Provider."

Create a Auth0-Connected Blazor App

Start by creating a Blazor project that references the CData API Driver for ADO.NET

1. Create a Blazor project on Visual Studio.

2. From the Solution Explorer, right click Dependencies, then click Add Project Reference.
3. In the Reference Manager, click the Browse button, and choose the .dll file of the installed ADO.NET Provider (e.g. System.Data.CData.API.dll, typically located at C:\Program Files\CData\CData API Driver for ADO.NET\lib etstandard2.0).

SELECT Auth0 Data from the Blazor App

1. Open the Index.razor file from the Project page.
2. In a APIConnection object, set the connection string:

   Start by setting the Profile connection property to the location of the Auth0 Profile on disk (e.g. C:\profiles\Auth0.apip). Next, set the ProfileSettings connection property to the connection string for Auth0 (see below).

   Auth0 API Profile Settings

   Create a Machine to Machine application in your Auth0 Dashboard under Applications, then authorize it for the Auth0 Management API with the required scopes.

   For example: Profile=C:\profiles\Auth0.apip;Authscheme=OAuth;OAuthClientId=your_client_id;OAuthClientSecret=your_client_secret;CallbackUrl=your_callback_url;

3. The code below creates a simple Blazor app for displaying Auth0 data, using standard SQL to query Auth0 just like SQL Server.

         @page "/"
         @using System.Data;
         @using System.Data.CData.API;
         
         <h1>Hello, world!</h1>
         
         Welcome to your Data app.
         
         <div class="row">
             <div class="col-12">
         
                 @using (APIConnection connection = new APIConnection(
                   "Profile=C:\profiles\Auth0.apip;Authscheme=OAuth;OAuthClientId=your_client_id;OAuthClientSecret=your_client_secret;CallbackUrl=your_callback_url;"))
                 {
                     var sql = "SELECT Id, TriggerId FROM ActionBindings WHERE DisplayName = 'my-action-binding'";
                     var results = new DataTable();
         
                     APIDataAdapter dataAdapter = new APIDataAdapter(sql, connection);
                     dataAdapter.Fill(results);
         
                     <table class="table table-bordered">
                         <thead class="thead-light">
                             <tr>
                                 @foreach (DataColumn item in results.Rows[0].Table.Columns)
                                 {
                                     <th scope="col">@item.ColumnName</th>
                                 }
                             </tr>
                         </thead>
                         <tbody>
                             @foreach (DataRow row in results.Rows)
                             {
                                 <tr>
                                     @foreach (var column in row.ItemArray)
                                     {
                                         <td>@column.ToString()</td>
                                     }
                                 </tr>
                             }
                         </tbody>
                     </table>
                 }
             </div>
         </div>
       

4. Rebuild and run the project. The ADO.NET Provider renders Auth0 data as an HTML table in the Blazor app.

   At this point, you have a Auth0-connected Blazor app, capable of working with live Auth0 data just like you would work with a SQL Server instance. Download a free, 30-day trial and start working with live Auth0 data in your Blazor apps today.