Tutorial by Examples: connection

If you want to notify other clients/users throughout the application ,you not need to worry about the connection because signalr new connection is created every time you visit other pages in the web app. we can leverage the users feature of signalr to achieve the same. see the example below: Here...

Requirements: Add following references to the project: Microsoft ActiveX Data Objects 2.8 Library Microsoft ActiveX Data Objects Recordset 2.8 Library Declare variables Private mDataBase As New ADODB.Connection Private mRS As New ADODB.Recordset Private mCmd As New ADODB.Command...

If we want to remove some database connection from the list of database connections. we need to use QSqlDatabase::removeDatabase(),however it's a static function and the way it work is a little wired. // WRONG WAY QSqlDatabase db = QSqlDatabase::database("sales"); QSqlQuery query(&...

The QSqlDatabase class provides an interface for accessing a database through a connection. An instance of QSqlDatabase represents the connection. The connection provides access to the database via one of the supported database drivers. Make sure to Add QT += SQL in the .pro file. Assume an SQ...

When trying to open a Database Connection with QODBC please ensure You have QODBC driver available Your server has an ODBC interface and is enabled to (this depends on your ODBC driver installations) use shared memory access, TCP/IP connections or named pipe connection. All connections only ...

var sck = "wss://site.com/wss-handler"; var wss = new WebSocket(sck); This uses the wss instead of ws to make a secure web socket connection which make use of HTTPS instead of HTTP