/// <summary>
/// Where you want to re-use an args object, this can be an easier method than using a new DBHelper
/// </summary>
/// <param name="args"></param>
/// <param name="szQ"></param>
/// <param name="onRead"></param>
/// <exception cref="ArgumentNullException"></exception>
public static void ExecuteWithArgs(DBHelperCommandArgs args, string szQ, Action <MySqlDataReader> onRead)
{
if (args == null)
{
throw new ArgumentNullException(nameof(args));
}
if (szQ == null)
{
throw new ArgumentNullException(nameof(szQ));
}
using (MySqlCommand comm = new MySqlCommand())
{
InitCommandObject(comm, args);
using (comm.Connection = new MySqlConnection(ConnectionString))
{
MySqlDataReader dr = null;
comm.CommandText = szQ;
comm.Connection.Open();
using (dr = comm.ExecuteReader())
{
onRead?.Invoke(dr);
}
}
}
}
/// <summary>
/// Execute a query that does not have rows as a result (e.g., an insert or a delete rather than a select).
/// </summary>
/// <param name="args">The DBHelpercommandArgs object to use; if not provided, the CommandArgs property is used.</param>
/// <param name="initCommand">A lambdat to add any necessary parameters or otherwise pre-process the command</param>
/// <returns>True for success</returns>
public bool DoNonQuery(DBHelperCommandArgs args, Action <MySqlCommand> initCommand = null)
{
if (args == null)
{
args = CommandArgs;
}
bool fResult = true;
using (MySqlCommand comm = new MySqlCommand())
{
InitCommandObject(comm, args);
initCommand?.Invoke(comm);
using (comm.Connection = new MySqlConnection(ConnectionString))
{
LastError = string.Empty;
try
{
comm.Connection.Open();
AffectedRowCount = comm.ExecuteNonQuery();
comm.CommandText = "SELECT Last_Insert_Id()";
LastInsertedRowId = Convert.ToInt32(comm.ExecuteScalar(), CultureInfo.InvariantCulture);
}
catch (MySqlException ex)
{
LastError = ex.Message;
fResult = false;
throw new MyFlightbookException("Exception DoNonQuery:\r\nCode = " + ex.ErrorCode.ToString(CultureInfo.InvariantCulture) + "\r\n" + ex.Message + "\r\n" + comm.CommandText, ex);
}
}
}
return(fResult);
}
/// <summary>
/// Executes a query
/// </summary>
/// <param name="args">Query string plus any pre-initialized parameters</param>
/// <param name="initCommand">Lambda to add any necessary parameters or otherwise pre-process the command</param>
/// <param name="readRow">Lambda to read a row. All rows will be read unless true is returned</param>
/// <param name="rowMode">Row mode - read all available rows or just a single row</param>
/// <returns>True for success. Sets LastError</returns>
public bool ReadRows(DBHelperCommandArgs args, Action <MySqlCommand> initCommand, Action <MySqlDataReader> readRow, ReadRowMode rowMode)
{
if (args == null)
{
throw new ArgumentNullException(nameof(args));
}
if (readRow == null)
{
throw new ArgumentNullException(nameof(readRow));
}
bool fResult = true;
using (MySqlCommand comm = new MySqlCommand())
{
InitCommandObject(comm, args);
using (comm.Connection = new MySqlConnection(ConnectionString))
{
LastError = string.Empty;
initCommand?.Invoke(comm);
try
{
comm.Connection.Open();
using (MySqlDataReader dr = comm.ExecuteReader())
{
if (dr.HasRows)
{
while (dr.Read())
{
readRow(dr);
if (rowMode == ReadRowMode.SingleRow)
{
break;
}
}
}
}
}
catch (MySqlException ex)
{
throw new MyFlightbookException("MySQL error thrown in ReadRows; Query = " + CommandText ?? string.Empty, ex, string.Empty);
}
catch (MyFlightbookException ex)
{
LastError = ex.Message;
fResult = false;
}
catch (Exception ex)
{
MyFlightbookException exNew = new MyFlightbookException(String.Format(CultureInfo.CurrentCulture, "Uncaught exception in ReadRows:\r\n:{0}", comm.CommandText), ex);
MyFlightbookException.NotifyAdminException(exNew);
throw exNew;
}
}
}
return(fResult);
}
public DBHelper(DBHelperCommandArgs args) : this()
{
if (args == null)
{
throw new ArgumentNullException("args");
}
CommandArgs = args;
}
public bool ReadRows(string szQ, Action <MySqlCommand> initCommand, Action <MySqlDataReader> readRow, ReadRowMode rowMode)
{
DBHelperCommandArgs args = new DBHelperCommandArgs()
{
QueryString = szQ
};
return(ReadRows(args, initCommand, readRow, rowMode));
}
/// <summary>
/// Returns a command object for the query string, to which parameters can be attached.
/// THE CONNECTION IS NOT INITIALIZED - IT IS UP TO THE CALLER TO using(MySqlConnection = new ....) { } IT!!!
/// </summary>
/// <param name="args">The specification of the query string and any pre-initialized parameters</param>
/// <returns>A usable MySqlCommand object</returns>
public static void InitCommandObject(MySqlCommand comm, DBHelperCommandArgs args)
{
if (comm == null)
{
throw new ArgumentNullException(nameof(comm));
}
if (args == null)
{
throw new ArgumentNullException(nameof(args));
}
comm.CommandText = args.QueryString;
comm.Parameters.AddRange(args.Parameters.ToArray());
if (args.Timeout > 0)
{
comm.CommandTimeout = args.Timeout;
}
}
public DBHelper(DBHelperCommandArgs args) : this()
{
CommandArgs = args ?? throw new ArgumentNullException(nameof(args));
}
public DBHelper()
{
CommandArgs = new DBHelperCommandArgs();
AffectedRowCount = -1;
}
/// <summary>
/// The MySqlCommand initialized for this query, including any and all parameters.
/// </summary>
public DBHelperCommandArgs ModelQueryCommand()
{
List <string> lstWhereTerms = new List <string>();
List <MySqlParameter> lstParams = new List <MySqlParameter>();
// Add each of the terms
string[] rgTerms = FullText.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < rgTerms.Length; i++)
{
AddQueryTerm(rgTerms[i], String.Format(CultureInfo.InvariantCulture, "FullText{0}", i), "Concat(model, ' ', manufacturers.manufacturer, ' ', typename, ' ', family, ' ', modelname, ' ', categoryclass.CatClass)", lstWhereTerms, lstParams);
}
string szPreferred = "0";
if (PreferModelNameMatch)
{
string szModelMatch = String.Format(CultureInfo.InvariantCulture, "%{0}%", ConvertWildcards(FullText));
szPreferred = "IF(model LIKE ?modelMatch, 1, 0)";
lstParams.Add(new MySqlParameter("modelMatch", szModelMatch));
}
AddQueryTerm(CatClass, "qCatClass", "catclass", lstWhereTerms, lstParams);
AddQueryTerm(rNormalizeModel.Replace(Model, string.Empty), "qModel", "REPLACE(REPLACE(model, ' ', ''), '-', '')", lstWhereTerms, lstParams);
if (ModelName.StartsWith(ICAOPrefix, StringComparison.CurrentCultureIgnoreCase))
{
AddQueryTerm(ModelName.Substring(ICAOPrefix.Length), "qFamilyName", "family", lstWhereTerms, lstParams);
}
else
{
AddQueryTerm(ModelName, "qModelName", "modelname", lstWhereTerms, lstParams);
}
AddQueryTerm(ManufacturerName, "qMan", "manufacturer", lstWhereTerms, lstParams);
AddQueryTerm(TypeName, "qType", "typename", lstWhereTerms, lstParams);
if (ManufacturerID != Manufacturer.UnsavedID)
{
lstWhereTerms.Add(" (models.idManufacturer = ?manID) ");
lstParams.Add(new MySqlParameter("manID", ManufacturerID));
}
string szHavingPredicate = String.Join(" AND ", lstWhereTerms.ToArray());
const string szQTemplate = @"SELECT
models.*,
manufacturers.manufacturer,
categoryclass.CatClass as 'Category/Class',
{0} AS AircraftIDs,
{1} AS preferred
FROM models
INNER JOIN manufacturers on manufacturers.idManufacturer = models.idmanufacturer
INNER JOIN categoryclass on categoryclass.idCatClass = models.idcategoryclass
{2}
{3}
{4}
{5}";
const string szQSamplesTemplate = @"LEFT OUTER JOIN (SELECT ac.idmodel, group_concat(DISTINCT img.imageKey separator ',') AS AircraftIDs
FROM Images img
INNER JOIN aircraft ac ON CAST(img.imageKey AS Unsigned)=ac.idaircraft
WHERE img.VirtPathID=1
GROUP BY ac.idmodel) Samples
ON models.idmodel=Samples.idmodel";
string szQ = String.Format(CultureInfo.InvariantCulture, szQTemplate,
IncludeSampleImages ? "Samples.AircraftIDs" : "NULL",
szPreferred,
IncludeSampleImages ? szQSamplesTemplate : string.Empty,
szHavingPredicate.Length == 0 ? string.Empty : String.Format(CultureInfo.InvariantCulture, " WHERE {0} ", szHavingPredicate),
SortOrderFromSortModeAndDirection(SortMode, SortDir),
(Limit > 0 && Skip >= 0) ? String.Format(CultureInfo.InvariantCulture, " LIMIT {0},{1} ", Skip, Limit) : string.Empty);
DBHelperCommandArgs args = new DBHelperCommandArgs(szQ, lstParams);
return(args);
}
