data-transfer/SnapshotWinFormsApp/Repository/DbSqlServer.cs

using SqlSugar;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SnapshotWinFormsApp.Repository;

public class DbSqlServer
{
    public Dictionary<string, SqlSugarClient> DbItems { get; private set; }

    private static DbSqlServer _instance;
    public static DbSqlServer Instance => _instance ??= new DbSqlServer();

    private DbSqlServer()
    {
        DbItems = new Dictionary<string, SqlSugarClient>();
        foreach (var item in ConfigurationManager.ConnectionStrings)
        {
            var settings = (ConnectionStringSettings)item;
            if (settings.ProviderName.Length < 8)
            {
                var db = new SqlSugarClient(new ConnectionConfig()
                {
                    ConnectionString = settings.ConnectionString,
                    DbType = settings.Name.StartsWith("PG") ? SqlSugar.DbType.PostgreSQL: SqlSugar.DbType.SqlServer,
                    IsAutoCloseConnection = true,
                    InitKeyType = InitKeyType.Attribute,
                    MoreSettings = new ConnMoreSettings
                    {
                        PgSqlIsAutoToLower = false,
                        PgSqlIsAutoToLowerCodeFirst = false,
                    }
                });

                db.Aop.OnLogExecuting = (sql, pars) =>
                {
                    Console.WriteLine(sql);
                };

                DbItems.Add(settings.ProviderName + settings.Name, db);
            }
        }
    }
}