Which namespace is used for sqlconnection

We can also check whether the connection is open or closed by its state property. Add the following code to the application. Open ; MessageBox. Show conn. ToString ; conn. Connection: This property is used to get connection to the database source which is specified in SqlConnection.

Which means we use ExecuteNonQuery in all operations with databases except retrieving records from a database. It only returns the number of affected rows. Now we use this method in our application. I am giving a simple example to insert a record into database. Take 3 labels, 3 textboxes and 1 button and arrange them as in the following figure.

Write the following code using System; using System. Generic; using System. ComponentModel; using System. Drawing; using System. Linq; using System. Text; using System. Forms; using System. This enumeration provides additional information about the different notifications that can be received by the dependency event handler. Describes the different notification types that can be received by an OnChangeEventHandler event handler through the SqlNotificationEventArgs parameter.

Handles the OnChange event that is fired when a notification is received for any of the commands associated with a SqlDependency object.

Represents the method that will handle the InfoMessage event of a SqlConnection. Using the SqlDataAdapter , you can fill a memory-resident DataSet that you can use to query and update the database. For conceptual information about using this namespace when programming with. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Skip to main content. This browser is no longer supported.

Download Microsoft Edge More info. Contents Exit focus mode. Note For conceptual information about using this namespace when programming with. Is this page helpful? Yes No. Any additional feedback? Skip Submit. Represents AD authentication parameters passed by a driver to authentication providers. Lets you efficiently bulk load a SQL Server table with data from another source. The base class that defines the interface for enclave providers for Always Encrypted.

Represents a connection to a SQL Server database. Included to support debugging applications. Not intended for direct use. Same issue solved here. This is for sure the best answer. Black Frog Black Frog At first, you should install System.

SqlClient package! MeirDayan You saved me. Didn't even consider this. Search for System. SqlClient and Press enter Select the first option, System.

SqlClient by Microsoft Click on the install button Wait for the installation to complete. I had the same problem and I found the solution shown above. Riad Rekab Riad Rekab 81 1 1 silver badge 6 6 bronze badges. Supriya Bandela Supriya Bandela 1 1 1 bronze badge. Eric J. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete?

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