Open Method (MySqlConnection)

In This Topic

Syntax
Remarks
Example
See Also

Opens a MySQL connection with the property settings specified by the ConnectionString.

Syntax

Visual Basic
C#

public override void Open()

'Declaration
 
Public Overrides Sub Open()

Remarks

The MySqlConnection draws an open connection from the connection pool if one is available. Otherwise, it establishes a new connection to the data source.

Note: If the MySqlConnection goes out of scope, the connection it represents does not close automatically. Therefore, you must explicitly close the connection by calling Close.

Opening an open connection does nothing.

Example

The following example creates a MySqlConnection, opens it, displays some of its properties, and then closes the connection.

csharp

public void CreateMySqlConnection(string myConnString)
{
  MySqlConnection myConnection = new MySqlConnection(myConnString);
  myConnection.Open();
  MessageBox.Show("ServerVersion: " + myConnection.ServerVersion
    + "\nState: " + myConnection.State.ToString());
  myConnection.Close();
}

Visual Basic

Public Sub CreateMySqlConnection(myConnString As String)
  Dim myConnection As New MySqlConnection(myConnString)
  myConnection.Open()
  MessageBox.Show("ServerVersion: " + myConnection.ServerVersion _
    + ControlChars.Cr + "State: " + myConnection.State.ToString())
  myConnection.Close()
End Sub

Reference

MySqlConnection Class
MySqlConnection Members
Close Method

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