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

Getting Started

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Install the CData ADO.NET Provider for SAP ERP

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

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

Create a SAP-Connected Blazor App

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

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

SELECT SAP Data from the Blazor App

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

   You can connect to SAP systems using either librfc32.dll, librfc32u.dll, NetWeaver, or Web Services (SOAP). Set the ConnectionType connection property to CLASSIC (librfc32.dll), CLASSIC_UNICODE (librfc32u.dll), NETWEAVER, or SOAP.

   If you are using the SOAP interface, set the Client, RFCUrl, SystemNumber, User, and Password properties, under the Authentication section.

   Otherwise, set Host, User, Password, Client, and SystemNumber.

   Note: We do not distribute the librfc32.dll or other SAP assemblies. You must find them from your SAP installation and install them on your machine.

   For more information, see this guide on obtaining the connection properties needed to connect to any SAP system.

   For example: Host=sap.mydomain.com;User=EXT90033;Password=xxx;Client=800;System Number=09;ConnectionType=Classic;Location=C:/mysapschemafolder;

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

         @page "/"
         @using System.Data;
         @using System.Data.CData.SAPERP;
         
         <h1>Hello, world!</h1>
         
         Welcome to your Data app.
         
         <div class="row">
             <div class="col-12">
         
                 @using (SAPERPConnection connection = new SAPERPConnection(
                   "Host=sap.mydomain.com;User=EXT90033;Password=xxx;Client=800;System Number=09;ConnectionType=Classic;Location=C:/mysapschemafolder;"))
                 {
                     var sql = "SELECT MANDT, MBRSH FROM MARA";
                     var results = new DataTable();
         
                     SAPERPDataAdapter dataAdapter = new SAPERPDataAdapter(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 data as an HTML table in the Blazor app.

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