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This article demonstrates how to access Twitter data from Appeon PowerBuilder using the CData ADO.NET Provider for Twitter.
This article demonstrates using the CData ADO.NET Provider for Twitter in PowerBuilder, showcasing the ease of use and compatibility of these standards-based controls across various platforms and development technologies that support Microsoft .NET, including Appeon PowerBuilder.
This article shows how to create a basic PowerBuilder application that uses the CData ADO.NET Provider for Twitter to perform reads and writes.
- In a new WPF Window Application solution, add all the Visual Controls needed for the connection properties.
All tables require authentication. You can connect using your User and Password or OAuth. To authenticate using OAuth, you can use the embedded OAuthClientId, OAuthClientSecret, and CallbackURL or you can register an app to obtain your own.
If you intend to communicate with Twitter only as the currently authenticated user, then you can obtain the OAuthAccessToken and OAuthAccessTokenSecret directly by registering an app.
See the Getting Started chapter in the help documentation for a guide to using OAuth.
- Add the DataGrid control from the .NET controls.
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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=From_User_Name}" Header="From_User_Name" Width="SizeToHeader" /> ... </DataGrid.Columns> </DataGrid>
- Add a reference to the CData ADO.NET Provider for Twitter 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.Twitter.TwitterConnection conn
conn = create System.Data.CData.Twitter.TwitterConnection(connectionString)
System.Data.CData.Twitter.TwitterCommand comm
comm = create System.Data.CData.Twitter.TwitterCommand(command, conn)
System.Data.DataTable table
table = create System.Data.DataTable
System.Data.CData.Twitter.TwitterDataAdapter dataAdapter
dataAdapter = create System.Data.CData.Twitter.TwitterDataAdapter(comm)
dataAdapter.Fill(table)
datagrid1.ItemsSource=table.DefaultView
The code above can be used to bind data from the specified query to the DataGrid.