public static Int16?GetInt16OrNull(this READER reader, int ordinal)
{
if (reader.IsDBNull(ordinal))
{
return(null);
}
else
{
return(reader.GetInt16(ordinal));
}
}
public static Int16 GetInt16OrDefault(this READER reader, int ordinal) => reader.IsDBNull(ordinal) ? default : reader.GetInt16(ordinal);
//
//-------------------------------------------------------------------------------------------------
//
public bool ds2browse(string browse_type_in, string browse_category_in, string browse_actor_in,
string browse_title_in, int batch_size_in, int customerid_out, ref int rows_returned,
ref int[] prod_id_out, ref string[] title_out, ref string[] actor_out, ref decimal[] price_out,
ref int[] special_out, ref int[] common_prod_id_out, ref double rt)
{
// Products table: PROD_ID INT, CATEGORY TINYINT, TITLE VARCHAR(50), ACTOR VARCHAR(50),
// PRICE DECIMAL(12,2), SPECIAL TINYINT, COMMON_PROD_ID INT
int i_row;
string data_in = null;
int[] category_out = new int[GlobalConstants.MAX_ROWS];
#if (USE_WIN32_TIMER)
long ctr0 = 0, ctr = 0, freq = 0;
#else
TimeSpan TS = new TimeSpan();
DateTime DT0;
#endif
switch(browse_type_in)
{
case "category":
Browse_By_Category.Parameters["batch_size_in"].Value = batch_size_in;
Browse_By_Category.Parameters["category_in"].Value = Convert.ToInt32(browse_category_in);
data_in = browse_category_in;
break;
case "actor":
Browse_By_Actor.Parameters["batch_size_in"].Value = batch_size_in;
Browse_By_Actor.Parameters["actor_in"].Value = "\"" + browse_actor_in + "\"";
data_in = "\"" + browse_actor_in + "\"";
break;
case "title":
Browse_By_Title.Parameters["batch_size_in"].Value = batch_size_in;
Browse_By_Title.Parameters["title_in"].Value = "\"" + browse_title_in + "\"";
data_in = "\"" + browse_title_in + "\"";
break;
}
// Console.WriteLine("Thread {0}: Calling Browse w/ browse_type= {1} batch_size_in= {2} data_in= {3}",
// Thread.CurrentThread.Name, browse_type_in, batch_size_in, data_in);
#if (USE_WIN32_TIMER)
QueryPerformanceFrequency(ref freq); // obtain system freq (ticks/sec)
QueryPerformanceCounter(ref ctr0); // Start response time clock
#else
DT0 = DateTime.Now;
#endif
try
{
switch(browse_type_in)
{
case "category":
Rdr = Browse_By_Category.ExecuteReader();
break;
case "actor":
Rdr = Browse_By_Actor.ExecuteReader();
break;
case "title":
Rdr = Browse_By_Title.ExecuteReader();
break;
}
i_row = 0;
while (Rdr.Read())
{
prod_id_out[i_row] = Rdr.GetInt32(0);
category_out[i_row] = Rdr.GetInt16(1);
title_out[i_row] = Rdr.GetString(2);
actor_out[i_row] = Rdr.GetString(3);
price_out[i_row] = Rdr.GetDecimal(4);
special_out[i_row] = Rdr.GetInt16(5);
common_prod_id_out[i_row] = Rdr.GetInt32(6);
++i_row;
}
Rdr.Close();
rows_returned = i_row;
}
catch (NpgsqlException e)
{
Console.WriteLine("Thread {0}: Error in Browse: {1}", Thread.CurrentThread.Name, e.Message);
return(false);
}
#if (USE_WIN32_TIMER)
QueryPerformanceCounter(ref ctr); // Stop response time clock
rt = (ctr - ctr0)/(double) freq; // Calculate response time
#else
TS = DateTime.Now - DT0;
rt = TS.TotalSeconds; // Calculate response time
#endif
return(true);
}