Connect to Cassandra Data from PowerBuilder

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Cassandra ADO.NET Provider

Connect .NET applications with the Cassandra real-time NoSQL cloud database service. Use Apache Cassandra as the big data backend that powers your .NET applications.



This article demonstrates how to access Cassandra data from PowerBuilder using the CData ADO.NET Provider for Cassandra.

The CData ADO.NET providers are easy-to-use, standards-based controls that can be used from any platform or development technology that supports Microsoft .NET, including PowerBuilder. This article shows how to use the CData ADO.NET Provider for Cassandra in PowerBuilder.

This article shows how to create a basic PowerBuilder application that uses the CData ADO.NET Provider for Cassandra to perform reads and writes.

  1. In a new WPF Window Application solution, add all the Visual Controls needed for the connection properties. Below is a typical connection string:

    Database=MyCassandraDB;Port=7000;Server=127.0.0.1;

    Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.

  2. Add the DataGrid control from the .NET controls.
  3. Configure the columns of the DataGrid control. Below are several columns from the Account table: <DataGrid AutoGenerateColumns="False" Margin="13,249,12,14" Name="datagrid1" TabIndex="70" ItemsSource="{Binding}"> <DataGrid.Columns> <DataGridTextColumn x:Name="idColumn" Binding="{Binding Path=Id}" Header="Id" Width="SizeToHeader" /> <DataGridTextColumn x:Name="nameColumn" Binding="{Binding Path=City}" Header="City" Width="SizeToHeader" /> ... </DataGrid.Columns> </DataGrid>
  4. Add a reference to the CData ADO.NET Provider for Cassandra assembly.

Connect the DataGrid

Once the visual elements have been configured, you can use standard ADO.NET objects like Connection, Command, and DataAdapter to populate a DataTable with the results of an SQL query:

System.Data.CData.Cassandra.CassandraConnection conn conn = create System.Data.CData.Cassandra.CassandraConnection(connectionString) System.Data.CData.Cassandra.CassandraCommand comm comm = create System.Data.CData.Cassandra.CassandraCommand(command, conn) System.Data.DataTable table table = create System.Data.DataTable System.Data.CData.Cassandra.CassandraDataAdapter dataAdapter dataAdapter = create System.Data.CData.Cassandra.CassandraDataAdapter(comm) dataAdapter.Fill(table) datagrid1.ItemsSource=table.DefaultView

The code above can be used to bind data from the specified query to the DataGrid.