CryptoCalc/DBInteraction.cs

using Dapper;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SQLite;
using System.Diagnostics;
using System.Linq;
using static CryptoCalc.DBClasses;

namespace CryptoCalc
{
    public class DBInteraction
    {

        public static void SaveData<T>(ref T _data) where T : DBClasses
        {
            if (_data is null)
            {
                throw new ArgumentNullException(nameof(_data));
            }
            using IDbConnection cnn = new SQLiteConnection(Util.GetConnectionString(_data.DBTableName));
            cnn.Execute($"insert into {_data.DBTableName} {_data.DBSaveDataString}", _data);
            Debug.WriteLine($"Saved {_data.DBTableName} DB data");
        }

        //public static List<T> _LoadTransactions()
        //{
        //    using IDbConnection _connection = new SQLiteConnection(Util.GetConnectionString("RawData"));
        //    var output = _connection.Query<T>("select * from RawData", new DynamicParameters());
        //    Debug.WriteLine("Loaded DB data");
        //    return output.ToList();
        //}


        public static List<Transaction> LoadTransactions()
        {
            using IDbConnection _connection = new SQLiteConnection(Util.GetConnectionString("Transactions"));
            var output = _connection.Query<Transaction>("select * from Transactions", new DynamicParameters());
            Debug.WriteLine("Loaded DB data");
            return output.ToList();
        }        
        

        public static List<Transaction> LoadTransactionsOfCurrency(string _currency)
        {
            Debug.WriteLine($"Fetching all {_currency} transactions from Database");
            using IDbConnection connection = new SQLiteConnection(Util.GetConnectionString("Transactions"));
            return connection.Query<Transaction>($"select * from Transactions where Currency = '{ _currency.ToUpper() }'").ToList();
        }
    }
}