You can use the PowerBuilder ADO.NET database interface to connect to a data source such as Adaptive Server Enterprise, Oracle, and Microsoft SQL Server, as well as to data sources exposed through OLE DB and XML, in much the same way as you use the PowerBuilder ODBC and OLE DB database interfaces.
Performance
You might experience better performance if you use a native database interface. The primary purpose of the ADO.NET interface is to support shared connections with other database constructs such as the .NET DataGrid in SAP DataWindow .NET.
When you access a database using ADO.NET in PowerBuilder, your connection goes through several layers before reaching the database. It is important to understand that each layer represents a separate component of the connection, and that components might come from different vendors.
The PowerBuilder ADO.NET interface consists of a driver (pbado170.dll) and a server (either Sybase.PowerBuilder.Db.dll or Sybase.PowerBuilder.DbExt.dll). The server has dependencies on a file called pbrth170.dll. These DLLs must be deployed with an application that connects to a database using ADO.NET. For Oracle 10g or Adaptive Server 15 or later, use Sybase.PowerBuilder.DbExt.dll. For earlier versions and other DBMSs, use Sybase.PowerBuilder.Db.dll.
The DataWindow .NET database interface for ADO.NET supports the ADO.NET data providers listed in the following table.
|
Data Provider |
Namespace |
|---|---|
|
.NET Framework Data Provider for OLE DB |
System.Data.OleDb |
|
.NET Framework Data Provider for SQL Server |
System.Data.SqlClient |
|
Oracle Data Provider for .NET (ODP.NET) |
Oracle.DataAccess.Client |
|
SAP ADO.NET Data Provider for Adaptive Server Enterprise (ASE) |
SAP.Data.AseClient |
Additional .NET Framework data providers may be supported in future releases. Please see the release bulletin for the latest information.
The following figure shows the general components of an ADO.NET connection using the OLE DB .NET Framework data provider.
Figure: Components of an ADO.NET OLE DB connection
The following figure shows the general components of an ADO.NET connection using a native ADO.NET data provider.
Figure: Components of a native ADO.NET connection
When you use the .NET Framework data provider for OLE DB, you connect to a database through an OLE DB data provider, such as Microsoft's SQLOLEDB or MSDAORA or a data provider from another vendor.
The .NET Framework Data Provider for OLE DB does not work with the MSDASQL provider for ODBC, and it does not support OLE DB version 2.5 interfaces.
You can use any OLE DB data provider that supports the OLE DB interfaces listed in the following table with the OLE DB .NET Framework data provider. For more information about supported providers, see the topic on .NET Framework data providers in the Microsoft .NET Framework Developer's Guide.
The PowerBuilder ADO.NET interface supports connection to SQL Anywhere, Adaptive Server Enterprise, Microsoft SQL Server, Oracle, Informix, and Microsoft Access with the OLE DB .NET Framework data provider.
After you install the data provider, you might need to define a data source for it.
|
OLE DB object |
Required interfaces |
|---|---|
|
OLE DB Services |
IDataInitialize |
|
DataSource |
IDBInitialize IDBCreateSession IDBProperties IPersist |
|
Session |
ISessionProperties IOpenRowset |
|
Command |
ICommandText ICommandProperties |
|
MultipleResults |
IMultipleResults |
|
RowSet |
IRowset IAccessor IColumnsInfo IRowsetInfo (only required if DBTYPE_HCHAPTER is supported) |
|
Error |
IErrorInfo IErrorRecords |
