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Add operations for database version 2.

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This commit is contained in:
Natalia Portillo
2018-04-12 10:05:42 +01:00
parent 8e999c1b2f
commit de9dc90b86
25 changed files with 4709 additions and 196 deletions
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214
Cicm.Database/Operations/Cpu.cs Normal file
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using System;
using System.Collections.Generic;
using System.Data;
using Cicm.Database.Schemas;
using Console = System.Console;
namespace Cicm.Database
{
public partial class Operations
{
public bool GetCpus(out List<Cpu> entries)
{
#if DEBUG
Console.WriteLine("Getting all CPUs...");
#endif
try
{
const string SQL = "SELECT * from cpu";
IDbCommand dbCmd = dbCon.CreateCommand();
IDbDataAdapter dataAdapter = dbCore.GetNewDataAdapter();
dbCmd.CommandText = SQL;
DataSet dataSet = new DataSet();
dataAdapter.SelectCommand = dbCmd;
dataAdapter.Fill(dataSet);
entries = CpusFromDataTable(dataSet.Tables[0]);
return true;
}
catch(Exception ex)
{
Console.WriteLine("Error getting CPUs.");
Console.WriteLine(ex);
entries = null;
return false;
}
}
public bool GetCpus(out List<Cpu> entries, ulong start, ulong count)
{
#if DEBUG
Console.WriteLine("Getting {0} CPUs from {1}...", count, start);
#endif
try
{
string sql = $"SELECT * FROM cpu LIMIT {start}, {count}";
IDbCommand dbCmd = dbCon.CreateCommand();
IDbDataAdapter dataAdapter = dbCore.GetNewDataAdapter();
dbCmd.CommandText = sql;
DataSet dataSet = new DataSet();
dataAdapter.SelectCommand = dbCmd;
dataAdapter.Fill(dataSet);
entries = CpusFromDataTable(dataSet.Tables[0]);
return true;
}
catch(Exception ex)
{
Console.WriteLine("Error getting CPUs.");
Console.WriteLine(ex);
entries = null;
return false;
}
}
public Cpu GetCpu(int id)
{
#if DEBUG
Console.WriteLine("Getting CPU with id {0}...", id);
#endif
try
{
string sql = $"SELECT * from cpu WHERE id = '{id}'";
IDbCommand dbCmd = dbCon.CreateCommand();
IDbDataAdapter dataAdapter = dbCore.GetNewDataAdapter();
dbCmd.CommandText = sql;
DataSet dataSet = new DataSet();
dataAdapter.SelectCommand = dbCmd;
dataAdapter.Fill(dataSet);
List<Cpu> entries = CpusFromDataTable(dataSet.Tables[0]);
return entries == null || entries.Count == 0 ? null : entries[0];
}
catch(Exception ex)
{
Console.WriteLine("Error getting CPU.");
Console.WriteLine(ex);
return null;
}
}
public long CountCpus()
{
#if DEBUG
Console.WriteLine("Counting CPUs...");
#endif
IDbCommand dbcmd = dbCon.CreateCommand();
dbcmd.CommandText = "SELECT COUNT(*) FROM cpu";
object count = dbcmd.ExecuteScalar();
dbcmd.Dispose();
try { return Convert.ToInt64(count); }
catch { return 0; }
}
public bool AddCpu(Cpu entry, out long id)
{
#if DEBUG
Console.Write("Adding CPU `{0}`...", entry.cpu);
#endif
IDbCommand dbcmd = GetCommandCpu(entry);
IDbTransaction trans = dbCon.BeginTransaction();
dbcmd.Transaction = trans;
const string SQL = "INSERT INTO cpu (cpu)" + " VALUES (@cpu)";
dbcmd.CommandText = SQL;
dbcmd.ExecuteNonQuery();
trans.Commit();
dbcmd.Dispose();
id = dbCore.LastInsertRowId;
#if DEBUG
Console.WriteLine(" id {0}", id);
#endif
return true;
}
public bool UpdateCpu(Cpu entry)
{
#if DEBUG
Console.WriteLine("Updating CPU `{0}`...", entry.cpu);
#endif
IDbCommand dbcmd = GetCommandCpu(entry);
IDbTransaction trans = dbCon.BeginTransaction();
dbcmd.Transaction = trans;
string sql = "UPDATE cpu SET cpu = @cpu " + $"WHERE id = {entry.id}";
dbcmd.CommandText = sql;
dbcmd.ExecuteNonQuery();
trans.Commit();
dbcmd.Dispose();
return true;
}
public bool RemoveCpu(long id)
{
#if DEBUG
Console.WriteLine("Removing CPU widh id `{0}`...", id);
#endif
IDbCommand dbcmd = dbCon.CreateCommand();
IDbTransaction trans = dbCon.BeginTransaction();
dbcmd.Transaction = trans;
string sql = $"DELETE FROM cpu WHERE id = '{id}';";
dbcmd.CommandText = sql;
dbcmd.ExecuteNonQuery();
trans.Commit();
dbcmd.Dispose();
return true;
}
IDbCommand GetCommandCpu(Cpu entry)
{
IDbCommand dbcmd = dbCon.CreateCommand();
IDbDataParameter param1 = dbcmd.CreateParameter();
param1.ParameterName = "@cpu";
param1.DbType = DbType.String;
param1.Value = entry.cpu;
dbcmd.Parameters.Add(param1);
return dbcmd;
}
static List<Cpu> CpusFromDataTable(DataTable dataTable)
{
List<Cpu> entries = new List<Cpu>();
foreach(DataRow dataRow in dataTable.Rows)
{
Cpu entry = new Cpu {id = int.Parse(dataRow["id"].ToString()), cpu = dataRow["cpu"].ToString()};
entries.Add(entry);
}
return entries;
}
}
}