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Database.cs
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using System;
using System.Configuration;
using System.Data;
using System.Data.SQLite;
namespace Database
{
public class SQLiteDataSource
{
string _connectionString = string.Empty;
string _db_name = string.Empty;
public SQLiteConnection Connection { get; set; } = new SQLiteConnection();
public SQLiteCommand Command { get; set; } = new SQLiteCommand();
public SQLiteDataReader Reader { get; set; } = null;
static Lazy<SQLiteDataSource> _database = new Lazy<SQLiteDataSource>(() =>
{
var db = new SQLiteDataSource();
db.Initialize();
return db;
});
public static SQLiteDataSource I => _database.Value;
public void Initialize()
{
_db_name = ConfigurationManager.AppSettings["DatbaseFilepath"].ToString();
_db_name = System.IO.Path.Combine(System.Windows.Forms.Application.StartupPath, _db_name);
_connectionString = ConfigurationManager.AppSettings["connection"].ToString();
_connectionString = string.Format(_connectionString, _db_name);
this.Connection.ConnectionString = _connectionString;
}
public void CloseConnection()
{
this.Reader.Close();
this.Command.Dispose();
this.Connection.Close();
}
}
public class SQLiteDataController
{
public SQLiteDataSource Database => SQLiteDataSource.I;
//public void Delete(bool all)
//{
// string dbpath = System.IO.Path.GetDirectoryName(db_name);
// try
// {
// foreach (string f in System.IO.Directory.GetFiles(dbpath))
// {
// if (!all)
// {
// if (f.ToLower() != this.db_name.ToLower())
// {
// System.IO.File.Delete(f);
// }
// }
// else
// {
// System.IO.File.Delete(f);
// }
// }
// }
// catch (Exception ex)
// {
// System.Diagnostics.Debug.WriteLine(ex.Message);
// }
//}
//public void ResetDatabase()
//{
// Delete(true);
// System.Diagnostics.Debug.WriteLine("reseting database");
// ExecuteNonQuery(DefaultDataAndSchema.sql, null);
// System.Diagnostics.Debug.WriteLine("done");
//}
public string ExecuteQuery(string sql_query, SQLiteParameter[] parameters)
{
string res = string.Empty;
this.Database.Connection.Open();
this.Database.Command = this.Database.Connection.CreateCommand();
this.Database.Command.CommandText = sql_query;
this.Database.Command.Parameters.Clear();
if (parameters != null)
this.Database.Command.Parameters.AddRange(parameters);
try
{
this.Database.Reader = this.Database.Command.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
res = CreateExceptionMessage(ex);
}
return res;
}
public string ExecuteNonQuery(string sql_query, SQLiteParameter[] parameters)
{
string res = string.Empty;
this.Database.Connection.Open();
this.Database.Command = this.Database.Connection.CreateCommand();
this.Database.Command.CommandText = sql_query;
this.Database.Command.Parameters.Clear();
if (parameters != null)
this.Database.Command.Parameters.AddRange(parameters);
try
{
this.Database.Command.ExecuteNonQuery();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("ERROR! " + ex.Message + "\r\n" + ex.StackTrace);
res = CreateExceptionMessage(ex);
}
//this.Database.CloseConnection();
return res;
}
private string CreateExceptionMessage(Exception ex)
{
string err = string.Empty;
err = @"An error occured while executing a query.
Exception Message: {0}
Stack Trace:
{1}";
err = string.Format(err, ex.Message, ex.StackTrace);
return err;
}
}
internal class DefaultDataAndSchema
{
public static string sql = @"
DROP TABLE IF EXISTS Groups;
CREATE TABLE [Groups] (
[groupid] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
[group_name] varchar(50) UNIQUE NOT NULL
);
DROP TABLE IF EXISTS Servers;
CREATE TABLE [Servers] (
[uid] varchar(20) UNIQUE NOT NULL,
[groupid] integer NOT NULL,
[servername] varchar(50) UNIQUE NOT NULL,
[server] varchar(15) NOT NULL,
[domain] varchar(255),
[port] integer NOT NULL,
[username] varchar(50) NOT NULL,
[password] varchar(1000) NOT NULL,
[description] varchar(255) NOT NULL,
[colordepth] integer NOT NULL,
[desktopwidth] integer NOT NULL,
[desktopheight] integer NOT NULL,
[fullscreen] integer NOT NULL
);
DROP VIEW IF EXISTS viewGroupsWithServerCount;
CREATE VIEW [viewGroupsWithServerCount] AS
select
Groups.groupid,
Groups.group_name,
(select count(Servers.uid) from Servers where Servers.groupid = Groups.groupid) as ServerCount
from
Groups;
/*
insert default datas
*/
INSERT INTO Groups(group_name) VALUES('Uncategorized');
INSERT INTO Groups(group_name) VALUES('Application Servers');
INSERT INTO Groups(group_name) VALUES('Web Servers');";
}
}