ADO.NET Cookbook by Bill Hamilton PDF

By Bill Hamilton

Deals 153 ideas, whole with code and motives, to difficulties ordinarily encountered while utilizing ADO.NET to aid facts entry in loosely coupled n-tier software architectures. The recommendations reveal how one can connect with information assets from ADO.NET, retrieve information utilizing SQL statements, look for files in perspectives and tables, replica information among ADO.NET sessions, bind information to types, and increase program functionality. The code examples are written in C#.

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NET Framework data providers. NET Framework data provider, its behavior is as if Persist Security Info is false and cannot be changed. Check the documentation for other data providers to determine specific implementation details. 40 41 Connecting to a database server requires passing credentials username and password to the server in a connection string. These credentials, together with the data source name, need to be kept private to protect unauthorized access to the data source. There are two approaches for obtaining these credentials: • Prompting for connection credentials at runtime.

0 to connect t later. x. PASSWORD=password Password Profile name Outlook or Exchange passw is not required if your netwo is passed to the Outlook or E This parameter is optional. PROFILE=profile The name of the Outlook or use. If this not specified, the used. MAPILEVEL= is the exact m server, a personal folder, or appears in the Outlook Fold Table path is the path immediately above the folde the SQL statement. The fold only when accessing folders of folders within the store; t character is always required nested folders, separate each backslash (\).

Never use sa or any other administrative account. Never use blank passwords. 41 42 Hardcode in the application An obvious technique for storing connection strings is hardcoding them into the application. Although this approach results in the best performance, it has poor flexibility; the application needs to be recompiled if the connection string needs to be changed for any reason. Security is poor. The code can be disassembled to expose connection string information. Caching techniques together with external storage techniques eliminate nearly all performance benefits of hardcoding over external storage techniques.

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