CursorName Property

Visual Basic
C#

'Declaration
 
Public ReadOnly Property CursorName As String

public string CursorName {get;}

Property Value

The name of the cursor.

This example demonstrates usage of PgSqlCursor class. To execute this code you have to create the following function on the server:

CREATE OR REPLACE FUNCTION refcursorfunc(OUT p refcursor) AS
$BODY$ 
DECLARE 
v_refcursor refcursor; 
BEGIN 
OPEN v_refcursor FOR SELECT deptno FROM dept; 
p := v_refcursor;
END; 
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;

csharp

PgSqlCommand cmd = new PgSqlCommand("refcursorfunc");
cmd.Connection = myConnection;
cmd.CommandType = CommandType.StoredProcedure;
cmd.ParameterCheck = true;
myConnection.Open();
PgSqlTransaction t = myConnection.BeginTransaction();
try {
  cmd.ExecuteNonQuery();
PgSqlCursor cursor = cmd.Parameters["p"].PgSqlValue as PgSqlCursor;
PgSqlCommand cursorCmd = new PgSqlCommand(String.Format("FETCH ALL FROM \"{0}\";", cursor.CursorName));
  cursorCmd.Connection = myConnection;
  using (PgSqlDataReader rd = cursorCmd.ExecuteReader()) {
    while (rd.Read())
      Console.WriteLine(rd.GetValue(0));
  }
}
finally {
  t.Commit();
  myConnection.Close();
}

Visual Basic

Dim cmd As New PgSqlCommand("refcursorfunc")
cmd.Connection = (Me.myConnection)
cmd.CommandType = CommandType.StoredProcedure
cmd.ParameterCheck = True
Me.myConnection.Open()
Dim t As PgSqlTransaction = Me.myConnection.BeginTransaction
Try
    cmd.ExecuteNonQuery()
Dim cursor As PgSqlCursor = TryCast(cmd.Parameters("p").PgSqlValue, PgSqlCursor)
Dim cursorCmd As New PgSqlCommand(String.Format("FETCH ALL FROM ""{0}"";", cursor.CursorName))
cursorCmd.Connection = Me.myConnection
Using rd As PgSqlDataReader = cursorCmd.ExecuteReader
        Do While rd.Read
            Console.WriteLine(rd.GetValue(0))
        Loop
    End Using
Finally
    t.Commit()
    Me.myConnection.Close()
End Try

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

Reference

PgSqlCursor Class
PgSqlCursor Members