適当に作った数値入力テキスト

NumericTextBox

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace Usercontrols
{
	[ToolboxBitmap(typeof(TextBox))]
	public class NumberText : TextBox
	{
		public NumberText()
			: base()
		{
			this.TextAlign = HorizontalAlignment.Right;
			this.ImeMode = ImeMode.Disable;
			this.KeyPress += new KeyPressEventHandler(this.NumberText_KeyPress);
			this.TextChanged += new EventHandler(this.NumberText_TextChanged);
		}

		
		/// <summary>
		/// 入力された数値を取得します。
		/// </summary>
		[Browsable(false)]
		public decimal? Value
		{
			get
			{
				decimal? d = null;

				if (!string.IsNullOrWhiteSpace(this.Text))
				{
					d = Convert.ToDecimal(this.Text.Replace(",", ""));
				}

				return d;
			}
		}

		
		[Browsable(true)]
		[Description("小数点付与の設定をします。")]
		/// <summary>
		/// 小数点付与の設定をします。
		/// </summary>
		public bool IsDecimalPoint { get; set; }


		/// <summary>
		/// 表示書式を設定します。
		/// </summary>
		[Browsable(true)]
		[Category("表示")]
		[Description("表示書式を設定します。")]
		public string OutPutFormat { get; set; }

		private void NumberText_KeyPress(object sender, KeyPressEventArgs e)
		{
			if ((e.KeyChar < '0' || '9' < e.KeyChar) && e.KeyChar != '\b')
			{
				e.Handled = true;
				return;
			}

			//e.Handled = Regex.IsMatch(e.KeyChar.ToString(), "^[0-9]+$") ? false : true;
		}

		private void NumberText_TextChanged(object sender, EventArgs e)
		{
			if (this.Name == this.Text) { return; }

			double i = double.Parse(this.Text.Replace(",", ""));
			this.Text = i.ToString(this.OutPutFormat);
			this.Select(this.Text.Length, 0);
			
		}


	}
}