Connect to DocuSign 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 ADO.NET Provider for DocuSign can be used with standard ADO.NET interfaces, such as LINQ and Entity Framework, to interact with live DocuSign 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 DocuSign using standard SQL queries.

Install the CData ADO.NET Provider for DocuSign

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

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

Create a DocuSign-Connected Blazor App

Start by creating a Blazor project that references the CData ADO.NET Provider for DocuSign

1. Create a Blazor project on Visual Studio.
👁 Create a Blazor app project.

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.DocuSign.dll, typically located at C:\Program Files\CData\CData ADO.NET Provider for DocuSign\lib etstandard2.0).
👁 Reference ADO.NET for DocuSign .dll in the Blazor app.

SELECT DocuSign Data from the Blazor App

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

   To connect to DocuSign, set the following connection properties:

   • UseSandbox: indicates whether current user account is sandbox or not (FALSE by default)
   • AccountId (optional): set it in the connection string if you have access to multiple Account Ids

   Authenticating to DocuSign

   DocuSign uses the OAuth authentication standard. To authenticate using OAuth, create an app to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL connection properties. See the Help documentation more information.

   For example: OAuthClientId=MyClientId; OAuthClientSecret=MyClientSecret; CallbackURL=http://localhost:33333;

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

    @page "/"
    @using System.Data;
    @using System.Data.CData.DocuSign;
    
    <h1>Hello, world!</h1>
    
    Welcome to your Data app.
    
    <div class="row">
    <div class="col-12">
    
    @using (DocuSignConnection connection = new DocuSignConnection(
    "OAuthClientId=MyClientId; OAuthClientSecret=MyClientSecret; 
   CallbackURL=http://localhost:33333;
   "))
    {
    var sql = "SELECT DocumentId, DocumentName FROM Documents WHERE DocumentName = 'TPSReport'";
    var results = new DataTable();
    
    DocuSignDataAdapter dataAdapter = new DocuSignDataAdapter(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 DocuSign data as an HTML table in the Blazor app. 👁 Query DocuSign from Blazor app.
   

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