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

Install the CData ADO.NET Provider for Apache Hive

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

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

Create a Hive-Connected Blazor App

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

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

SELECT Hive Data from the Blazor App

1. Open the Index.razor file from the Project page.
2. In a ApacheHiveConnection object, set the connection string: Set the Server, Port, TransportMode, and AuthScheme connection properties to connect to Hive.

   For example: Server=127.0.0.1;Port=10000;TransportMode=BINARY;

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

    @page "/"
    @using System.Data;
    @using System.Data.CData.ApacheHive;
    
    <h1>Hello, world!</h1>
    
    Welcome to your Data app.
    
    <div class="row">
    <div class="col-12">
    
    @using (ApacheHiveConnection connection = new ApacheHiveConnection(
    "Server=127.0.0.1;Port=10000;TransportMode=BINARY;"))
    {
    var sql = "SELECT City, CompanyName FROM Customers";
    var results = new DataTable();
    
    ApacheHiveDataAdapter dataAdapter = new ApacheHiveDataAdapter(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 Hive data as an HTML table in the Blazor app. 👁 Query Hive from Blazor app.
   

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