PIbd-33_Dyakonov_R_R_COP_14/WinFormsLibrary1/CustomTextBox.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using WinFormsLibrary1.Errors;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;

namespace WinFormsLibrary1
{
	public partial class CustomTextBox : UserControl
	{
		public int? MinLength { get; set; } = null;
		public int? MaxLength { get; set; } = null;

		public event EventHandler ValueChanged;

		public string Value
		{
			get
			{
				if (MinLength == null || MaxLength == null)
					throw new RangeNotSetException();

				if (textBox.Text.Length < MinLength || textBox.Text.Length > MaxLength)
					throw new TextLengthOutOfRangeException(MinLength ?? -1, MaxLength ?? -1);

				return textBox.Text;
			}
			set
			{
				if (MinLength == null || MaxLength == null
				  || textBox.Text.Length < MinLength || textBox.Text.Length > MaxLength)
					return;

				textBox.Text = value;
			}
		}

		public string CheckValue(string v)
		{
			if (MinLength == null || MaxLength == null)
				throw new RangeNotSetException();

			if (v.Length < MinLength || v.Length > MaxLength)
				throw new TextLengthOutOfRangeException(MinLength ?? -1, MaxLength ?? -1);

			return v;

		}

		public CustomTextBox()
		{
			InitializeComponent();
		}

		private void textBox1_TextChanged(object sender, EventArgs e)
		{
			ValueChanged?.Invoke(this, EventArgs.Empty);
		}
	}
}