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// https://dev.mysql.com/doc/connector-net/en/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Reflection;
using System.Text;
using log4net;
using MySql.Data.MySqlClient;
namespace OpenSim.Data.MySQL
{
public class MySQLRaw
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private string m_connectString;
public MySQLRaw(string connect)
{
m_connectString = connect;
}
public int Count(string table)
{
return Count(table, "");
}
public int Count(string table, string wher)
{
string query = "SELECT Count(*) FROM " + table;
if ("" != wher)
query = query + " WHERE " + wher;
int result = -1;
object r = doScalarQuery(query);
if (r != null)
result = Convert.ToInt32(r);
return result;
}
public List< Hashtable > Join(string table, string select, string join, string wher, string order)
{
if ("" == select)
select = "*";
string query = "SELECT " + select + " FROM " + table;
if ("" != join)
query = query + " " + join;
if ("" != wher)
query = query + " WHERE " + wher;
if ("" != order)
query = query + " ORDER BY " + order;
using (MySqlConnection dbcon = new MySqlConnection(m_connectString))
{
dbcon.Open();
MySqlCommand cmd = new MySqlCommand(query, dbcon);
MySqlDataReader rdr = cmd.ExecuteReader();
List<string> names = new List<string>();
DataTable schema = rdr.GetSchemaTable();
List< Hashtable > list = new List< Hashtable >();
foreach (DataRow row in schema.Rows)
{
string tbl = "";
string nm = "";
string tp = "";
foreach (DataColumn col in schema.Columns)
{
if ("BaseTableName" == col.ColumnName) tbl = row[col].ToString();
if ("ColumnName" == col.ColumnName) nm = row[col].ToString();
if ("DataType" == col.ColumnName) tp = row[col].ToString();
}
names.Add(nm);
}
while (rdr.Read())
{
Hashtable r = new Hashtable();
foreach (string name in names)
{
r[name] = rdr[name];
}
list.Add(r);
}
rdr.Close();
dbcon.Close();
return list;
}
}
public List< Hashtable > Select(string table, string select, string wher, string order)
{
if ("" == select)
select = "*";
string query = "SELECT " + select + " FROM " + table;
if ("" != wher)
query = query + " WHERE " + wher;
if ("" != order)
query = query + " ORDER BY " + order;
using (MySqlConnection dbcon = new MySqlConnection(m_connectString))
{
dbcon.Open();
MySqlCommand cmd = new MySqlCommand(query, dbcon);
MySqlDataReader rdr = cmd.ExecuteReader();
List<string> names = new List<string>();
DataTable schema = rdr.GetSchemaTable();
List< Hashtable > list = new List< Hashtable >();
foreach (DataRow row in schema.Rows)
{
string tbl = "";
string nm = "";
string tp = "";
foreach (DataColumn col in schema.Columns)
{
if ("BaseTableName" == col.ColumnName) tbl = row[col].ToString();
if ("ColumnName" == col.ColumnName) nm = row[col].ToString();
if ("DataType" == col.ColumnName) tp = row[col].ToString();
}
names.Add(nm);
}
while (rdr.Read())
{
Hashtable r = new Hashtable();
foreach (string name in names)
{
r[name] = rdr[name];
}
list.Add(r);
}
rdr.Close();
dbcon.Close();
return list;
}
}
private object doScalarQuery(string query)
{
try
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectString))
{
dbcon.Open();
MySqlCommand cmd = new MySqlCommand(query, dbcon);
Object ret = cmd.ExecuteScalar();
dbcon.Close();
return ret;
}
}
catch (MySqlException e)
{
m_log.ErrorFormat("[MYSQL RAW]: Problem connecting to the database {0}", e.Message);
return null;
}
}
private void doNonQuery(string query)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectString))
{
dbcon.Open();
MySqlCommand cmd = new MySqlCommand(query, dbcon);
cmd.ExecuteNonQuery();
dbcon.Close();
}
}
public void Insert(string table)
{
string query = "INSERT INTO " + table + " (name, age) VALUES('John Smith', '33')";
doNonQuery(query);
}
public void Update(string table, string wher)
{
string query = "UPDATE " + table + " SET name='Joe', age='22'";
if ("" != wher)
query = query + " WHERE " + wher;
doNonQuery(query);
}
public void Delete(string table, string wher)
{
string query = "DELETE FROM " + table;
if ("" != wher)
query = query + " WHERE " + wher;
doNonQuery(query);
}
}
}
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