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PostgreSQLDirect .NET is an ADO.NET data provider for PostgreSQL servers.
It has advanced capabilities in accessing PostgreSQL database. The following list contains key features of PostgreSQLDirect .NET. You can compare it to Npgsql's features.

- Direct access to PostgreSQL server
- Doesn't require PostgreSQL client library and uses PostgreSQL protocol directly
- 100% managed code
- High performance
- Easy to deploy
- Supports the latest versions of PostgreSQL server
- All PostgreSQL data types support
- Compact Framework support
- Mono Framework support
- Stored functions support
- Returning result sets from stored functions
- Advanced connection pooling feature
- Fill DataSet with multiple query
- PgSqlScript component to execute scripts
- PgSqlLoader component for fast loading data
- PgSqlDump component to backup and restore data
- PgSqlDataTable component to retrieve and manipulate data
- Named parameters support
- Ability of monitoring query execution
- Base-Class-Based provider model
- Ability to store data in PgSqlDataReader object
- Ability to retrieve metadata information
- Paginal access to query result
- Asynchronous execution support
- Composite types support
- Advanced design-time editors
- Generate DataSet Wizard
- TableMapping editor
- Data preview
- Easy migration from ODBC and OLE DB .NET Data Providers with Migration Wizard
- Help integrated into Visual Studio .NET
- Free support for registered users
- Licensed per a developer without royalty fee

Please refer to pages on our site dedicated to PostgreSQLDirect .NET to obtain detailed information:
http://www.crlab.com/pgsqlnet/
You can download the trial version of PostgreSQLDirect .NET and try it.

Thanks!

I have another problem as follows:

Does PostgreSQLDirect .NET is a free software ?

can I get it's source codes ?

if so ,can you give me a copy ?(email:[email protected])
if not,can you tell me how to implement the DataAdapter.Fill(DataSet ds) method or what is the Mechanism of DataAdapter.Fill method?

Thank you very much!

PostgreSQLDirect .NET is not a free product. You can download the trial version for free. We do not disclose source code. PgSqlDataAdapter.Fill(DataSet ds) is implemented in base class System.Data.Common.DbDataAdapter. For information on how it works refer to MSDN.

I know.thanks