public int Delete()
{
//Use with caution! This will fail if orphaned entries exist
String queryFull = "DELETE FROM " + tableName, queryCondition = " WHERE " + attribNames[0] + "=" + BookingID + " AND " + attribNames[1] + "='" + RoomName + "'";
//verify input keys
if (BookingID < 0) { return -1; }
if (RoomName == "" || RoomName == "*" || RoomName == " ") { return -1; }
//Check record exists in the first place
RoomRequest test = new RoomRequest();
int initCheck = test.Load(BookingID, RoomName);
if (initCheck < 0) { return -1; }
//Wot? No DB integrity checks? Resource Requests don't need them, as deleting won't result in orphan entries
queryFull += queryCondition; //pull query together
//attempt DB connection
try
{
dbConnection = new SqlConnection(dbInString);
dbConnection.Open();
}
catch { return -1; }
//create command that will run query
dbCommand = dbConnection.CreateCommand();
dbCommand.CommandText = queryFull;
dbCommand.CommandType = CommandType.Text;
dbCommand.CommandTimeout = 15;
//Run command, and tidy-up if exceptions occur
try { dbReader = dbCommand.ExecuteReader(); }
catch
{
dbReader.Close();
dbConnection.Close();
return -1;
}
//Check was deleted successfully
int delCheck = Load(BookingID, RoomName);
if (delCheck > -1) { return -1; }
NewOrOld = true; //as the record no longer exists in the database, is considered 'new'
//Clean-up DB connection
try
{
dbReader.Close();
dbConnection.Close();
}
catch { return -1; }
return 0;
}
public int Save()
{
//Strings to handle query as it's built
String queryFull = "", queryCondition = "";
int result = 0;
//verify input keys
if (BookingID < 0) { return -1; }
/* TO-DO: UNCOMMENT ONCE BOOKING CLASS EXISTS */
//Booking test = new Booking();
//result = test.Load(BookingID);
if (RoomName == "" || RoomName == "*" || RoomName == " ") { return -1; }
RoomRecord test = new RoomRecord();
result = test.Load(RoomName);
if(result<0) { return -1; }
//is this a new record? If so, we need an INSERT statement. Else, an UPDATE
if (NewOrOld == true)
{
queryFull = "INSERT INTO " + tableName + " VALUES (";
queryFull += BookingID + ", ";
queryFull += "'" + RoomName + "', ";
queryFull += "'" + Requester + "', ";
queryFull += "'" + Convert.ToString(Approved) + "', ";
queryFull += "'" + createdTimeStamp.ToString("dd-MMMM-yyyy H:mm:ss") + "')";
}
else
{
//verify the record actually exists
RoomRequest testA = new RoomRequest();
int initCheck = testA.Load(BookingID, RoomName);
if (initCheck < 0) { return -1; }
//build the UPDATE query (the two primary key fields are skipped here)
queryFull = "UPDATE " + tableName + " SET ";
queryCondition = "WHERE " + attribNames[0] + "=" + BookingID + " AND " + attribNames[1] + "='" + RoomName + "'"; //compound key!
queryFull += attribNames[2] + "='" + Requester + "', ";
//as before, ensures bit value is sent
queryFull += attribNames[3] + "='" + Convert.ToString(Approved) + "', ";
queryFull += attribNames[4] + "='" + createdTimeStamp.ToString("dd-MMMM-yyyy H:mm:ss") + "' ";
queryFull += queryCondition;
}
//attempt DB connection
try
{
dbConnection = new SqlConnection(dbInString);
dbConnection.Open();
}
catch { return -1; }
//create command that will run query
dbCommand = dbConnection.CreateCommand();
dbCommand.CommandText = queryFull;
dbCommand.CommandType = CommandType.Text;
dbCommand.CommandTimeout = 15;
//Run command, and tidy-up if exceptions occur
try { dbReader = dbCommand.ExecuteReader(); }
catch
{
dbReader.Close();
dbConnection.Close();
return -1;
}
//Clean-up DB connection
try
{
dbReader.Close();
dbConnection.Close();
}
catch { return -1; }
//check if saved correctly if new
if (NewOrOld == true)
{
int saveCheck = Load(BookingID, RoomName);
if (saveCheck < 0) { return -1; }
}
NewOrOld = false; //fail-safe
return 0;
}
public int Populate(int bookingID)
{
//re-initialise lists
roomRequests = new List<RoomRequest>();
roomNames = new List<String>();
//Build query - only need a list of creators' usernames, so query has been tailored accordingly
String queryFull = "SELECT " + attribNames[1] + " FROM " + tableName + " WHERE " + attribNames[0] + "=" + bookingID;
//Verify the ID paramerer value is sensible
if (bookingID < 0) { return -1; }
//attempt DB connection
try
{
dbConnection = new SqlConnection(dbInString);
dbConnection.Open();
}
catch { return -1; }
//create command that will run query
dbCommand = dbConnection.CreateCommand();
dbCommand.CommandText = queryFull;
dbCommand.CommandType = CommandType.Text;
dbCommand.CommandTimeout = 15;
//Run command, and tidy-up if exceptions occur
try { dbReader = dbCommand.ExecuteReader(); }
catch
{
dbReader.Close();
dbConnection.Close();
return -1;
}
//import list of resource names from Db
while (dbReader.Read())
{
try
{
roomNames.Add(dbReader[attribNames[1]].ToString());
}
catch { return -1; }
}
//verify more than one result. If not, error.
if (roomNames.Count() < 1) { return -1; }
//Use this list to import resource request records
foreach (String res in roomNames)
{
RoomRequest newRequest = new RoomRequest();
int importNote = newRequest.Load(bookingID, res);
if (importNote < 0) { return -1; } //if failed, bail with error code
else
{
roomRequests.Add(newRequest); //if all went well, add to list
}
}
//verify more than one result. Else, error (important, as must be at least one resource request per booking)
if (roomRequests.Count() < 1) { return -1; }
//Clean-up DB connection
try
{
dbReader.Close();
dbConnection.Close();
}
catch { return -1; }
return 0;
}
