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

namespace AIMS.OremrUserControl
{
    public partial class NumTextBox : TextBox
    {
        /// <summary> 
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary> 
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region 组件设计器生成的代码

        /// <summary> 
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // NumTextBox
            // 
            this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.NumTextBox_KeyPress);
            this.ResumeLayout(false);

        }

        #endregion

        public NumTextBox()
        {
            InitializeComponent();
        }
        private void NumTextBox_KeyPress(object sender, KeyPressEventArgs e)
        {
            TextBox tb = sender as TextBox;
            int n = tb.Text.LastIndexOf(".");
            int j = tb.Text.LastIndexOf("-");
            if (e.KeyChar < 48 || e.KeyChar > 57)
            {
                if (e.KeyChar != 46 && e.KeyChar != 8 && e.KeyChar != 13)
                {
                    e.Handled = true;
                }
                if (e.KeyChar == 45 && j != -1)
                {
                    e.Handled = true;
                }
            }
            if (e.KeyChar == 46 && n >= 0)
            {
                e.Handled = true;
            }
            //if (e.KeyChar == 13)
            //{
            //    SendKeys.Send("{tab}");
            //}
            if (e.KeyChar == 8)
            {
                return;
            }


            if (n < 0 && tb.Text.Length > 5)
            {
                e.Handled = true;
            }
            if (tb.Text.Length > 7)
            {
                e.Handled = true;
            }
            if (n > 0 && n < tb.Text.Length - 2)
            {
                e.Handled = true;
            }
        }
    }
}