Download ADO.NET Cookbook by Bill Hamilton PDF

By Bill Hamilton

Deals 153 options, whole with code and reasons, to difficulties more often than not encountered while utilizing ADO.NET to aid info entry in loosely coupled n-tier program architectures. The recommendations show find out how to connect with information resources from ADO.NET, retrieve facts utilizing SQL statements, look for files in perspectives and tables, reproduction facts among ADO.NET periods, bind information to types, and increase software functionality. The code examples are written in C#.

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16 Setting Connection Pooling Options Problem You need to know the different them. NET data provider. Load Creates a Connection, attaches an event handler to its StateChange event, and sets default properties for controls on the form that are used to specify connection properties. The UpdateConnection( ) method is called to dynamically construct a connection string from the specified properties. UpdateConnectionString( ) This method dynamically constructs a connection string from the connection string properties specified by the user in text boxes on the form.

7 demonstrates techniques that simulate a record count for a DataReader and discusses limitations of the techniques. You can define DataSet and DataReader object schemas programmatically or infer them from a database schema. Retrieving schema information from the database has its limitations. For example, data relations cannot be created in a DataSet from the database schema. NET Framework data types to define column schema in tables. NET Framework data types. NET Framework data types as well as the DataReader type accessors for each.

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.

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