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Devart.Data.PostgreSql Namespace / PgSqlConnection Class
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    PgSqlConnection Class
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    Represents an open connection to PostgreSQL.
    Syntax
    Remarks

    A PgSqlConnection object represents a unique connection to PostgreSQL. Use it in conjunction with PgSqlCommand, PgSqlDataReader, PgSqlDataAdapter or other components for convenient interoperation with PostgreSQL.

    When you create an instance of PgSqlConnection, all properties are set to their initial values. For a list of these values, see ConnectionString.

    If the PgSqlConnection goes out of scope, it is not closed. Therefore, you must explicitly close the connection by calling Close.

    Note that PgSqlConnection instance is not guaranteed to be thread safe. You should avoid using the same PgSqlConnection in several threads at the same time. It is recommended to open a new connection per thread and to close it when the work is done. Actually, connections will not be created/disposed every time with the Pooling=true; connection string option - connections will be stored at connection pool. This boosts performance greatly.

    A single PgSqlConnection can be used by many PgSqlCommand objects on the assumption that all operations will be done consecutively. In other words, you can not execute a SQL statement while an asynchronous operation is in progress.

    This class supports cross-form data binding with the InterForm Technology.

    Example
    The following example creates a PgSqlCommand and a PgSqlConnection. The PgSqlConnection is opened and set as the Connection property. The example then calls ExecuteNonQuery method, and closes the connection. To accomplish this, the ExecuteNonQuery is passed a connection string and a query string that is SQL INSERT statement.
    public void InsertRow(string pgConnectionString)
    {
      // If the connection string is empty, use default.
      if(pgConnectionString == "")
      {
        pgConnectionString = 
            "host=server;database=test;user id=postgres;";
      }
      PgSqlConnection myConn = new PgSqlConnection(pgConnectionString);
      string myInsertQuery = "INSERT INTO DEPT VALUES (50,'Development','Philadelphia')";
      PgSqlCommand pgCommand = new PgSqlCommand(myInsertQuery);
      pgCommand.Connection = myConn;
      myConn.Open();
      try
      {
        pgCommand.ExecuteNonQuery();
      }
      finally
      {
        myConn.Close();
      }
    }
    Public Sub InsertRow(pgConnectionString As String)
      ' If the connection string is empty, use default.
      If pgConnectionString = "" Then
        pgConnectionString = _
            "host=server;database=test;user id=postgres;"
      End If
      Dim myConn As New PgSqlConnection(pgConnectionString)
      Dim myInsertQuery As String = "INSERT INTO DEPT VALUES (50,'Development','Philadelphia')"
      Dim pgCommand As New PgSqlCommand(myInsertQuery)
      pgCommand.Connection = myConn
      myConn.Open()
      Try
        pgCommand.ExecuteNonQuery()
      Finally
        myConn.Close()
      End Try
    End Sub
    Inheritance Hierarchy

    System.Object
       System.MarshalByRefObject
          System.ComponentModel.Component
             System.Data.Common.DbConnection
                Devart.Common.DbConnectionBase
                   Devart.Data.PostgreSql.PgSqlConnection

    Requirements

    Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also