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

Install the CData ADO.NET Provider for SAP HANA

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

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

Create a SAP HANA-Connected Blazor App

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

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

SELECT SAP HANA Data from the Blazor App

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

   Set the Server, Database and Port properties to specify the address of your SAP Hana database to interact with. Set the User and the Password properties to authenticate to the server.

   For example: User=system;Password=mypassword;Server=localhost;Database=systemdb;

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

    @page "/"
    @using System.Data;
    @using System.Data.CData.SAPHANA;
    
    <h1>Hello, world!</h1>
    
    Welcome to your Data app.
    
    <div class="row">
    <div class="col-12">
    
    @using (SAPHANAConnection connection = new SAPHANAConnection(
    "User=system;Password=mypassword;Server=localhost;Database=systemdb;"))
    {
    var sql = "SELECT Name, OwnerId FROM Buckets WHERE Name = 'TestBucket'";
    var results = new DataTable();
    
    SAPHANADataAdapter dataAdapter = new SAPHANADataAdapter(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 HANA data as an HTML table in the Blazor app. 👁 Query SAP HANA from Blazor app.
   

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