/*----------------------------------------------------------------
*
// author:HQ
*
// describe:Database connet
*
// date:2019-10-08
*
------------------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Data.OracleClient;
using System.Data.SqlClient;
using MySql.Data.MySqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace WorkNet
{
public class Database_Operation
{
private SqlConnection sql_con;
private OracleConnection oracle_con;
private MySqlConnection mysql_con;
#region SqlServer
/// <summary>
/// SQLserver open
/// </summary>
/// <param name="link">link statement</param>
/// <returns>Success:success; Fail:reason</returns>
public string Sqlserver_Open(string link)
{
try
{
sql_con = new SqlConnection(link);
sql_con.Open();
return "success";
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// SQLserver close
/// </summary>
/// <returns>Success:success Fail:reason</returns>
public string Sqlserver_Close()
{
try
{
if (sql_con == null)
{
return "No database connection";
}
if (sql_con.State == ConnectionState.Open || sql_con.State == ConnectionState.Connecting)
{
sql_con.Close();
sql_con.Dispose();
}
else
{
if (sql_con.State == ConnectionState.Closed)
{
return "success";
}
if (sql_con.State == ConnectionState.Broken)
{
return "ConnectionState:Broken";
}
}
return "success";
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// SQLserver insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string Sqlserver_Insdelupd(string sql)
{
try
{
int num = 0;
if (sql_con == null)
{
return "Please open the database connection first";
}
if (sql_con.State == ConnectionState.Open)
{
SqlCommand sqlCommand = new SqlCommand(sql, sql_con);
num = sqlCommand.ExecuteNonQuery();
}
else
{
if (sql_con.State == ConnectionState.Closed)
{
return "Database connection closed";
}
if (sql_con.State == ConnectionState.Broken)
{
return "Database connection is destroyed";
}
if (sql_con.State == ConnectionState.Connecting)
{
return "The database is in connection";
}
}
return "success" + num;
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}
/// <summary>
/// SQLserver insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <param name="link">link statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string Sqlserver_Insdelupd(string sql, string link)
{
the try
{
int num = 0;
the using (the SqlConnection the SqlConnection new new = CON (Link))
{
con.Open ();
tools SqlCommand // database operation
SqlCommand cmd = new SqlCommand (sql, con); // action statement and linking tools
num = cmd.ExecuteNonQuery (); // perform the operation returns to affect the number of rows
con.Close ();
return "Success" NUM +;
}
}
the catch (Exception EX)
{
return ex.Message.ToString ();
}
}
/// <summary>
/// SQLserver the SELECT
/// </summary>
/// <param name="sql">select statement</param>
/// <param name="record">Success:success; Fail:reason</param>
/// <returns>select result</returns>
public DataSet Sqlserver_Select(string sql, out string record)
{
try
{
//储存数据的工具初始化
DataSet dataSet = new DataSet();
if (sql_con == null)
{
record = "Please open the database connection first";
return dataSet;
}
if (sql_con.State == ConnectionState.Open)
{
SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sql, sql_con);
sqlDataAdapter.Fill(dataSet, "sample");
sqlDataAdapter.Dispose();
record = "success";
return dataSet;
}
if (sql_con.State == ConnectionState.Closed)
{
record = "Database connection closed";
return dataSet;
}
if (sql_con.State == ConnectionState.Broken)
{
record = "Database connection is destroyed";
return dataSet;
}
if (sql_con.State == ConnectionState.Connecting)
{
record = "The database is in connection";
return dataSet;
}
record = "ERROR";
return dataSet;
}
catch (Exception ex)
{
DataSet dataSet = new DataSet();
record = ex.Message.ToString();
return dataSet;
}
}
/// <summary>
SELECT SQLserver ///
/// </summary>
/// <param name="sql">select statement</param>
/// <param name = "Link"> Link Statement </ param>
/// <param name = "Record"> Success: Success; the Fail: reason </ param>
/// <Returns> Result SELECT </ Returns>
public Sqlserver_Select the DataSet (SQL String, String link, String Record OUT)
{
the try
{
// initialization means for storing data
the DataSet the DataSet new new DS = ();
// corresponds to a link to a database tools (connection string)
the using (the SqlConnection the SqlConnection new new = CON (Link))
{
con.Open (); // open
// SqlConnection tool with links to databases, is now stored in sql adapter by sql query results
SqlDataAdapter sda = new SqlDataAdapter (sql, con); // ( query and connectivity tools)
sda.Fill (ds, "sample") ; // data into the adapter DataSet tool
con.Close (); // run the SqlConnection tool
sda.Dispose (); // manual release the SqlDataAdapter
Record = "Success" ;
return DS;
}
}
the catch (Exception EX)
{
the DataSet the DataSet new new dataSet A = ();
Record ex.Message.ToString = ();
return dataSet A;
}
}
#endregion
#region the MySQL
/// <summary>
/// MySQL open
/// </summary>
/// <param name="link">link statement</param>
/// <returns>Success:success; Fail:reason</returns>
public string MySQL_Open(string link)
{
try
{
mysql_con = new MySqlConnection(link);
mysql_con.Open();
return "success";
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// MySQL close
/// </summary>
/// <returns>Success:success Fail:reason</returns>
public string MySQL_Close()
{
try
{
if (mysql_con == null)
{
return "No database connection";
}
if (mysql_con.State == ConnectionState.Open || mysql_con.State == ConnectionState.Connecting)
{
mysql_con.Close();
mysql_con.Dispose();
}
else
{
if (mysql_con.State == ConnectionState.Closed)
{
return "success";
}
if (mysql_con.State == ConnectionState.Broken)
{
return "ConnectionState:Broken";
}
}
return "success";
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// MySQL insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string MySQL_Insdelupd(string sql)
{
try
{
int num = 0;
if (mysql_con == null)
{
return "Please open the database connection first";
}
if (mysql_con.State == ConnectionState.Open)
{
MySqlCommand sqlCommand = new MySqlCommand(sql, mysql_con);
num = sqlCommand.ExecuteNonQuery();
}
else
{
if (mysql_con.State == ConnectionState.Closed)
{
return "Database connection closed";
}
if (mysql_con.State == ConnectionState.Broken)
{
return "Database connection is destroyed";
}
if (mysql_con.State == ConnectionState.Connecting)
{
return "The database is in connection";
}
}
return "success" + num;
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}
/// <summary>
/// MySQL insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <param name="link">link statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string MySQL_Insdelupd(string sql, string link)
{
try
{
int num = 0;
using (MySqlConnection con = new MySqlConnection(link))
{
con.Open ();
tools // operation of the database of the SqlCommand
the MySqlCommand cmd = new new the MySqlCommand (SQL, con); // (operating statements and linking tools)
NUM = cmd.ExecuteNonQuery (); // perform operations affect the number of rows returned
con .close ();
return "Success" NUM +;
}
}
the catch (Exception EX)
{
return ex.Message.ToString ();
}
}
/// <Summary>
/// the MySQL SELECT
/// </ Summary>
/ // <param name = "sql" > select statement </ param>
/// <param name="record">Success:success; Fail:reason</param>
/// <returns>select result</returns>
public DataSet MySQL_Select(string sql, out string record)
{
try
{
//储存数据的工具初始化
DataSet dataSet = new DataSet();
if (mysql_con == null)
{
record = "Please open the database connection first";
return dataSet;
}
if (mysql_con.State == ConnectionState.Open)
{
MySqlDataAdapter sqlDataAdapter = new MySqlDataAdapter(sql, mysql_con);
sqlDataAdapter.Fill(dataSet, "sample");
sqlDataAdapter.Dispose();
record = "success";
return dataSet;
}
if (mysql_con.State == ConnectionState.Closed)
{
record = "Database connection closed";
return dataSet;
}
if (mysql_con.State == ConnectionState.Broken)
{
record = "Database connection is destroyed";
return dataSet;
}
if (mysql_con.State == ConnectionState.Connecting)
{
record = "The database is in connection";
return dataSet;
}
record = "ERROR";
return dataSet;
}
catch (Exception ex)
{
DataSet dataSet = new DataSet();
record = ex.Message.ToString();
return dataSet;
}
}
/// <summary>
/// MySQL select
/// </ Summary>
/// <param name = "SQL"> SELECT Statement </ param>
/// <param name = "Link"> Link Statement </ param>
/// <param name = "Record "> Success: Success; the Fail: reason </ param>
/// <Returns> SELECT Result </ Returns>
public DataSet MySQL_Select (SQL String, String Link, String Record OUT)
{
the try
{
// initialization means for storing data
DataSet ds = new DataSet ();
a // tools corresponding to the link database (connection string)
the using (the MySqlConnection the MySqlConnection new new = CON (link))
{
con.Open ();//turn on
// SqlConnection tool with links to databases, through sql query sql query results are now stored in the adapter
MySqlDataAdapter sda = new MySqlDataAdapter (sql, con); // ( query and connectivity tools)
sda.Fill (ds, "the Sample"); // DataSet data into the tool adapter
con.Close (); // run the SqlConnection tool
sda.Dispose (); // manual release the SqlDataAdapter
Record = "Success";
return DS;
}
}
the catch (Exception EX)
{
the DataSet the DataSet new new dataSet A = ();
Record ex.Message.ToString = ();
return dataSet;
}
}
#endregion
#region Oracle
/// <summary>
/// Oracle open
/// </summary>
/// <param name="link">link statement</param>
/// <returns>Success:success; Fail:reason</returns>
public string Oracle_Open(string link)
{
try
{
oracle_con = new OracleConnection(link);
oracle_con.Open();
return "success";
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// Oracle close
/// </summary>
/// <returns>Success:success Fail:reason</returns>
public string Oracle_Close()
{
try
{
if (oracle_con == null)
{
return "No database connection";
}
if (oracle_con.State == ConnectionState.Open)
{
oracle_con.Close();
oracle_con.Dispose();
}
else
{
if (oracle_con.State == ConnectionState.Closed)
{
return "success";
}
if (oracle_con.State == ConnectionState.Broken)
{
return "ConnectionState:Broken";
}
}
return "success";
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// Oracle insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string Oracle_Insdelupd(string sql)
{
try
{
int num = 0;
if (oracle_con == null)
{
return "Please open the database connection first";
}
if (oracle_con.State == ConnectionState.Open)
{
OracleCommand oracleCommand = new OracleCommand(sql, oracle_con);
num = oracleCommand.ExecuteNonQuery();
}
else
{
if (oracle_con.State == ConnectionState.Closed)
{
return "Database connection closed";
}
if (oracle_con.State == ConnectionState.Broken)
{
return "Database connection is destroyed";
}
}
return "success" + num;
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}
/// <summary>
/// Oracle insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <param name="link">link statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string Oracle_Insdelupd(string sql, string link)
{
try
{
int num = 0;
using (OracleConnection oracleConnection = new OracleConnection(link))
{
DataSet dataSet = new DataSet();
oracleConnection.Open();
OracleCommand oracleCommand = new OracleCommand(sql, oracleConnection);
num = oracleCommand.ExecuteNonQuery();
oracleConnection.Close();
return "success" + num;
}
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}
/// <summary>
/// Oracle select
/// </summary>
/// <param name="sql">select statement</param>
/// <param name="record">Success:success; Fail:reason</param>
/// <returns>select result</returns>
public DataSet Oracle_Select(string sql, out string record)
{
try
{
DataSet dataSet = new DataSet();
if (oracle_con != null)
{
if (oracle_con.State == ConnectionState.Open)
{
OracleDataAdapter oracleDataAdapter = new OracleDataAdapter(sql, oracle_con);
oracleDataAdapter.Fill(dataSet, "sample");
oracleDataAdapter.Dispose();
record = "OK";
return dataSet;
}
if (oracle_con.State == ConnectionState.Closed)
{
record = "Database connection closed";
}
else if (oracle_con.State == ConnectionState.Broken)
{
record = "Database connection is destroyed";
}
}
else
{
record = "Please open the database connection first";
}
record = "error";
return dataSet;
}
catch (Exception ex)
{
DataSet dataSet = new DataSet();
record = ex.Message.ToString();
return dataSet;
}
}
/// <summary>
/// Oracle select
/// </summary>
/// <param name="sql">select statement</param>
/// <param name="link">link statement</param>
/// <param name="record">Success:success; Fail:reason</param>
/// <returns>select result</returns>
public DataSet Oracle_Select(string sql, string link, out string record)
{
try
{
using (OracleConnection oracleConnection = new OracleConnection(link))
{
DataSet dataSet = new DataSet();
oracleConnection.Open();
OracleDataAdapter oracleDataAdapter = new OracleDataAdapter(sql, oracleConnection);
oracleDataAdapter.Fill(dataSet, "sample");
oracleDataAdapter.Dispose();
oracleConnection.Close();
record = "success";
return dataSet;
}
}
catch (Exception ex)
{
DataSet dataSet = new DataSet();
record = ex.Message.ToString();
return dataSet;
}
}
#endregion
#region Access
/// <summary>
/// Access select
/// </summary>
/// <param name="sql">select statement</param>
/// <param name="link">link statement</param>
/// <param name="record">Success:success; Fail:reason</param>
/// <returns>select result</returns>
public DataSet Access_Mdb_Select(string sql, string link, out string record)
{
try
{
DataSet dataSet = new DataSet();
using (OleDbConnection oleDbConnection = new OleDbConnection(link))
{
oleDbConnection.Open();
OleDbDataAdapter oleDbDataAdapter = new OleDbDataAdapter(sql, oleDbConnection);
oleDbDataAdapter.Fill(dataSet, "sample");
oleDbDataAdapter.Dispose();
oleDbConnection.Close();
record = "success";
return dataSet;
}
}
catch (Exception ex)
{
DataSet dataSet = new DataSet();
record = ex.Message.ToString();
return dataSet;
}
}
/// <summary>
/// Access insert,delete,update
/// </summary>
/// <param name="sql">insert,delete,update statement</param>
/// <param name="link">link statement</param>
/// <returns>Success:success + Number of affected rows; Fail:reason</returns>
public string Access_Mdb_Insdelupd(string sql, string link)
{
try
{
using (OleDbConnection oleDbConnection = new OleDbConnection(link))
{
DataSet dataSet = new DataSet();
oleDbConnection.Open();
OleDbCommand oleDbCommand = new OleDbCommand(sql, oleDbConnection);
int num = oleDbCommand.ExecuteNonQuery();
oleDbConnection.Close();
return "success" + num;
}
}
catch (Exception ex)
{
return ex.Message.ToString();
}
}
#endregion
}
}