Владимир Коротенко

Console.WriteLine(new DateTime(2023, 3, 1).GetSeason());
Console.WriteLine(new DateTime(2023, 6, 1).GetSeason());
Console.WriteLine(new DateTime(2023, 9, 1).GetSeason());
Console.WriteLine(new DateTime(2023, 12, 1).GetSeason());
Console.WriteLine(new DateTime(2023, 12, 2).GetSeasonDay());
public enum Season
{
    Spring,
    Summer,
    Autumn,
    Winter
}


public static class SeasonTools
{
    public static Season GetSeason(this DateTime date)
    {
        int month = date.Month;

        if (month >= 3 && month <= 5) return Season.Spring;
        else if (month >= 6 && month <= 8) return Season.Summer;
        else if (month >= 9 && month <= 11) return Season.Autumn;
        else return Season.Winter;
    }
    public static int GetSeasonDay(this DateTime date)
    {
        int month = date.Month;
        if (month >= 3 && month <= 5) return GetDay(date,Season.Spring);
        else if (month >= 6 && month <= 8) return GetDay(date,Season.Summer);
        else if (month >= 9 && month <= 11) return GetDay(date,Season.Autumn);
        else return GetDay(date, Season.Winter);
    }
    private static int GetDay(DateTime date, Season season)
    {
        if (season == Season.Spring) return (int) (date - new DateTime(date.Year, 3, 1) ).TotalDays ;
        else if (season == Season.Summer) return (int)(date - new DateTime(date.Year, 6, 1)).TotalDays;
        else if (season == Season.Autumn) return (int)(date - new DateTime(date.Year, 9, 1)).TotalDays;
        else return (int)(date - new DateTime(date.Year, 12, 1)).TotalDays;
    }
}

private void Select(object sender, RoutedEventArgs e)
        {
            var ff = new FolderBrowserDialog();
            if (ff.ShowDialog() == DialogResult.OK)
            {
                
                foreach (var file in Directory.EnumerateFiles(ff.SelectedPath, "*.dbf"))
                {
                    var sqlFileName = file.Remove(file.IndexOf('.')) + "_asd_34.sql";
                    // тут вызываете конвертор
                    DbfToSql(file, sqlFileName);
                }
            }
        }

switch (type)
            {
                case "Double":
                    return Type_.int_; // если пришел Double отправляем int
                case "String":
 // но как узнать длину строк? Возможно нужно пробежаться по всем данным и вычислить максимальную?
                    return "VARCHAR2(42)"; // если пришел String отправляем varchar(255)
                case "DateTime":
                    return Type_.Datetime_; // если пришел DateTime, отправляем datetime
            }

public interface ISqlGenerator
    {
        string Generate();
    }
    public class Parent
    {
    }
    public class new_table : Parent, ISqlGenerator
    {
        public string Generate()
        {
            return "insert ....";
        }
    }
    public class tb : Parent, ISqlGenerator 
    {
        private string _id;
        private string _name;

        public string Id { get => _id; set => _id = value; }
        public string Name { get => _name; set => _name = value; }

        public tb(string id, string name)
        {
            Id = id;
            Name = name;
        }
        public string Generate()
        {
            return "insert ....";
        }
    }
    public class Crud {
        public static bool Add(Parent instance, string tableName)
        {
            if (instance is tb)
            {
                    var t = instance as tb;
            }
            else if (instance is new_table)
            {
                       var t = instance as new_table;
            }
            return false;
        }
        public static bool AddInterface(ISqlGenerator instance, string tableName) {
            var sql = instance.Generate();
            return false;
        }
    }

var imagefile = document.getElementById("upload_files") as HTMLInputElement;
    if (imagefile == null) return;
    if (imagefile.files == null) return;
    const files = imagefile.files;
    for (let i = 0; i < files.length; i++) {
      formData.append("files", files[i]);
    }

using System;
					
public class Program
{
	public static void Main()
	{
		try{
		  GetImage(2);
		}
		catch(ArgumentException e){
		  Console.WriteLine( int.Parse(e.Message));
		}
	}
	public static string GetImage(int index){
	  if(index == 1){ return "/img/1";}
	  throw new ArgumentException("5");
	}
}

using System;
					
public class Program
{
	public static void Main()
	{
		Object r = GetImage(1);
		Check(r);
		 r = GetImage(2);
		Check(r);
	}
	public static void Check(Object o){
	   if(o is String) Console.WriteLine("string");
	   if(o is int) Console.WriteLine("int");
		else
		Console.WriteLine(o.GetType());
	}
	public static Object GetImage(int index){
	  if(index == 1){ return "/img/1";}
	  return 5;
	}
}