/// <summary>
/// Creates a new Cursor in a Transaction
/// </summary>
/// <remarks>
/// This method wraps the native ham_cursor_create function.
/// <br />
/// Creates a new Database Cursor. Cursors can be used to traverse
/// the Database from start to end or vice versa. Cursors can also
/// be used to insert, delete or search Database items.
///
/// A newly created Cursor does not point to any item in the Database.
///
/// The application should close all Database Cursors before closing
/// the Database.
/// </remarks>
/// <param name="db">The Database object</param>
/// <param name="txn">The optional Transaction</param>
/// <exception cref="DatabaseException">
/// <list type="bullet">
/// <item><see cref="HamConst.HAM_OUT_OF_MEMORY"/>
/// if the new structure could not be allocated</item>
/// </list>
/// </exception>
public void Create(Database db, Transaction txn)
{
this.db = db;
lock (this.db) {
int st = NativeMethods.CursorCreate(out handle, db.Handle,
txn != null ? txn.Handle : IntPtr.Zero, 0);
if (st != 0)
{
throw new DatabaseException(st);
}
db.AddCursor(this);
}
}
/// <summary>
/// Creates a new Cursor in a Transaction
/// </summary>
/// <remarks>
/// This method wraps the native ham_cursor_create function.
/// <br />
/// Creates a new Database Cursor. Cursors can be used to traverse
/// the Database from start to end or vice versa. Cursors can also
/// be used to insert, delete or search Database items.
///
/// A newly created Cursor does not point to any item in the Database.
///
/// The application should close all Database Cursors before closing
/// the Database.
/// </remarks>
/// <param name="db">The Database object</param>
/// <param name="txn">The optional Transaction</param>
/// <exception cref="DatabaseException">
/// <list type="bullet">
/// <item><see cref="HamConst.HAM_OUT_OF_MEMORY"/>
/// if the new structure could not be allocated</item>
/// </list>
/// </exception>
public void Create(Database db, Transaction txn)
{
this.db = db;
lock (this.db) {
int st = NativeMethods.CursorCreate(out handle, db.Handle,
txn != null ? txn.Handle : IntPtr.Zero, 0);
if (st != 0)
throw new DatabaseException(st);
db.AddCursor(this);
}
}