Connect to GraphQL Data from PowerBuilder

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GraphQL ADO.NET Provider

Rapidly create and deploy powerful .NET applications that integrate with GraphQL.



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

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 GraphQL in PowerBuilder.

This article shows how to create a basic PowerBuilder application that uses the CData ADO.NET Provider for GraphQL to retrieve data.

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

    AuthScheme=Basic;User=username;Password=password;URL=https://mysite.com;InitiateOAuth=GETANDREFRESH

    You must specify the URL of the GraphQL service. The driver supports two types of authentication:

    • Basic: Set AuthScheme to Basic. You must specify the User and Password of the GraphQL service.
    • OAuth 1.0 & 2.0: Take a look at the OAuth section in the Help documentation for detailed instructions.

  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=Name}" Header="Name" Width="SizeToHeader" /> ... </DataGrid.Columns> </DataGrid>
  4. Add a reference to the CData ADO.NET Provider for GraphQL 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.GraphQL.GraphQLConnection conn conn = create System.Data.CData.GraphQL.GraphQLConnection(connectionString) System.Data.CData.GraphQL.GraphQLCommand comm comm = create System.Data.CData.GraphQL.GraphQLCommand(command, conn) System.Data.DataTable table table = create System.Data.DataTable System.Data.CData.GraphQL.GraphQLDataAdapter dataAdapter dataAdapter = create System.Data.CData.GraphQL.GraphQLDataAdapter(comm) dataAdapter.Fill(table) datagrid1.ItemsSource=table.DefaultView

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