Connect to SAP Business Warehouse 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 SAP Business Warehouse can be used with standard ADO.NET interfaces, such as LINQ and Entity Framework, to interact with live SAP Business Warehouse 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 SAP Business Warehouse using standard SQL queries.

Install the CData ADO.NET Provider for SAP Business Warehouse

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

Install the SAP Business Warehouse ADO.NET Data Provider from the CData website or from NuGet. Search NuGet for "SAP Business Warehouse ADO.NET Data Provider."

Create a SAP Business Warehouse-Connected Blazor App

Start by creating a Blazor project that references the CData ADO.NET Provider for SAP Business Warehouse

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.SAPBusinessWarehouse.dll, typically located at C:\Program Files\CData\CData ADO.NET Provider for SAP Business Warehouse\lib etstandard2.0).

SELECT SAP Business Warehouse Data from the Blazor App

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

   To connect to SAP Business Warehouse, set the URL property to a valid SAP Business Warehouse server base URL. The driver must connect to SAP Business Warehouse instances hosted over HTTP with XMLA access.

   The driver supports the following authentication schemes via the AuthScheme property:

   • None: Anonymous authentication, if available on the server.
   • Basic: Set User and Password and set AuthScheme to Basic.
   • Kerberos: See the Using Kerberos section of the help documentation for the required Kerberos properties.

   By default, the driver attempts to negotiate SSL/TLS by checking the server's certificate against the system's trusted certificate store. To specify another certificate, see the SSLServerCert property for the available formats.

   For example: URL=https://mysapserver:8000;AuthScheme=Basic;User=username;Password=password;

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

         @page "/"
         @using System.Data;
         @using System.Data.CData.SAPBusinessWarehouse;
         
         <h1>Hello, world!</h1>
         
         Welcome to your Data app.
         
         <div class="row">
             <div class="col-12">
         
                 @using (SAPBusinessWarehouseConnection connection = new SAPBusinessWarehouseConnection(
                   "URL=https://mysapserver:8000;AuthScheme=Basic;User=username;Password=password;"))
                 {
                     var sql = "SELECT CustomerCount, City FROM Sales WHERE Country = 'US'";
                     var results = new DataTable();
         
                     SAPBusinessWarehouseDataAdapter dataAdapter = new SAPBusinessWarehouseDataAdapter(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 SAP Business Warehouse data as an HTML table in the Blazor app.

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