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Connection: This property specifies or retrieves the OdbcConnection. Cancel: This method cancels the execution of the OdbcCommand object. CreateParameter: This method is used to create an instance of the OdbcParameter object.

The code below creates and initializes an OdbcCommand object. It sets few common properties of the OdbcCommand object. ExecuteReader ; while odbcreaderDiary. Read MessageBox. Show odbcdreaderDiary. GetValue 1. ToString ; This source code creates an instance of the OdbcConnection class is created namely, odbcconDiary.

An instance of the OdbcCommand class is created. The Connection property specifies the connection to the database. The CommandText sets the command to be executed.

The Open method opens the connection to the database. The ExecuteReader method executes the command on the connection. The result of the execution is read by an instance of OdbcDataReader namely odbcdreaderDiary. While the data is been read from the data reader, a message box is displayed showing the value in the second column of the current row.

The ToString method converts the data into a string value. NET objects and the data source. It is used to retrieve data from the data source into DataSet or a DataTable by using the Fill method.

After retrieving data from the DataAdapter, the disconnected objects do not have any information about the connection, tables, columns, or the source of data. The retrieved data can be manipulated and later updated in the data source. DataAdapter helps in bridging the data source and the dataset. Thus, the data can be passed between applications without the risk of revealing the details of the data source. Two of the most common ways are mentioned below in the source code.

This source code creates a DataAdapter object by specifying a commandText string and the Connection string in the constructor. Fill dsetEmployees ; MessageBox. Table[ 0 ]. Rows[ 0 ][ 1 ]. An instance of the DataAdapter class is created by invoking the constructor of the SqlDataAdapter class. This constructor takes the commandText string and an instance of the SqlConnection class as the parameter.

A dataset is created and the Fill method fills the dataset with the records of the Employees table. A message box is displayed showing the value in the second column of the first row.

The ToString method converts the column value into the string format. NET connectivity. Services Consulting Education Modernization Outsourcing. Related: ADO. NET DataDirect. DataDirect ADO. NET Technology Difference? These objects are suitable for read-only access, such as populating a list and then breaking the connection.

The DbConnection object represents a connection to the data source. The connection could be shared among different command objects. The DbCommand object represents the command or a stored procedure sent to the database from retrieving or manipulating data. So far, we have used tables and databases already existing in our computer. In this example, we will create a table, add column, rows and data into it and display the table using a GridView object.

The application first creates a data set and binds it with the grid view control using the DataBind method of the GridView control. The Createdataset method is a user defined function, which creates a new DataSet object and then calls another user defined method CreateStudentTable to create the table and add it to the Tables collection of the data set.

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