lyfz_repos/铂金版源码/LYFZ.ComponentLibrary/DateTimePickerEx.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.ComponentModel;
using System.Runtime.InteropServices;
namespace LYFZ.ComponentLibrary
{
    public class DateTimePickerEx : System.Windows.Forms.DateTimePicker
    {
        public DateTimePickerEx()
        {
            this.Format = DateTimePickerFormat.Custom;
            this.CustomFormat = " ";
            this.ValueChanged += DateTimePickerEx_ValueChanged;
            this.KeyDown += DateTimePickerEx_KeyDown;
            this.CloseUp += DateTimePickerEx_CloseUp;
        }

        void DateTimePickerEx_CloseUp(object sender, EventArgs e)
        {
            DateTimePickerEx_ValueChanged(null, null);
        }


        void DateTimePickerEx_KeyDown(object sender, KeyEventArgs e)
        {
            if (e == null || e.KeyCode == Keys.Delete || e.KeyCode == Keys.Back)
            {
                this.dateValue = "";

                setCustomFormat();
            }
            //throw new NotImplementedException();
        }

        void DateTimePickerEx_ValueChanged(object sender, EventArgs e)
        {
            if (this.Value > LYFZ.WinAPI.CustomPublicMethod.GetNullDateTime())
            {
                if (IsShowTime)
                {
                    this.dateValue = this.Value.ToString(timeFormat);
                }
                else
                {
                    this.dateValue = this.Value.ToString(dateFormat);
                }
            }
            else {
                this.dateValue = "";
            }
            setCustomFormat();
        }
        string timeFormat = "yyyy-MM-dd HH:mm";
        string dateFormat = "yyyy-MM-dd";
        bool isShowTime = false;
        /// <summary>
        /// 
        /// </summary>
        [Category("控件扩展属性"), Description("是否显示时间")]
        public bool IsShowTime
        {
            get { return isShowTime; }
            set
            {
                isShowTime = value;
                setCustomFormat();
                Invalidate(false);
            }
        }
        void setCustomFormat()
        {
            if (IsEmpty)
            {
                this.CustomFormat = " ";
            }
            else
            {
                if (IsShowTime)
                {
                    this.CustomFormat = timeFormat;
                }
                else
                {
                    this.CustomFormat = dateFormat;
                }
            }
        }

        DateTime minimumDate = Convert.ToDateTime("1900-01-01");

        string dateValue = "";

        /// <summary>
        /// 获取日期字符串
        /// </summary>
        [Category("控件扩展属性"), Description("获取日期字符串")]
        public string DateValue
        {
            get { return dateValue; }
            set
            {
                dateValue = value;
                DateTime tempTime;

                if (DateTime.TryParse(dateValue, out tempTime) && tempTime > minimumDate)
                {
                    try
                    {
                        this.Value = tempTime;
                    }
                    catch { }
                }
                else
                {
                    // this.Value = DateTime.Now;
                    this.dateValue = "";
                    //DateTimePickerEx_KeyDown(null, null);
                }
                setCustomFormat();
                Invalidate(false);
            }
        }
        /// <summary>
        /// 获取日期时间字符串
        /// </summary>
        [Category("控件扩展属性"), Description("获取日期时间字符串")]
        public string DateTimeValue
        {
            get { return dateValue+" "+SDateTime.Now.ToString("HH:mm:ss"); }            
        }

        /// <summary>
        /// 
        /// </summary>
        [Category("控件扩展属性"), Description("是否为空")]
        public bool IsEmpty
        {
            get
            {
                bool bl = true;
                if (dateValue.Trim() == "")
                {
                    bl = true;
                }
                else
                {
                    bl = false;
                }
                return bl;
            }
        }

        #region 画边框
        [DllImport("user32.dll", EntryPoint = "SendMessageA")]
        private static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, object lParam);

        [DllImport("user32")]
        private static extern IntPtr GetWindowDC(IntPtr hWnd);

        [DllImport("user32")]
        private static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
        const int WM_ERASEBKGND = 0x14;
        const int WM_NC_PAINT = 0x85;
        const int WM_PAINT = 0xF;
        const int WM_PRINTCLIENT = 0x318;

        //边框颜色
        private Pen BorderPen = new Pen(System.Drawing.Color.FromArgb(23, 169, 254), 2);//23, 169, 254

        protected override void WndProc(ref System.Windows.Forms.Message m)
        {
            setCustomFormat();
            IntPtr hDC = IntPtr.Zero;
            Graphics gdc = null;
            switch (m.Msg)
            {
                //画背景色
                case WM_ERASEBKGND:
                    gdc = Graphics.FromHdc(m.WParam);
                    gdc.FillRectangle(new SolidBrush(Color.White), new Rectangle(0, 0, this.Width, this.Height));
                    gdc.Dispose();
                    break;
                //画边框
                case WM_PAINT:
                    base.WndProc(ref m);
                    hDC = GetWindowDC(m.HWnd);
                    gdc = Graphics.FromHdc(hDC);
                    OverrideControlBorder(gdc);
                    ReleaseDC(m.HWnd, hDC);
                    gdc.Dispose();
                    break;
                default:
                    base.WndProc(ref m);
                    break;
            }
        }


        private void OverrideControlBorder(Graphics g)
        {
            g.DrawRectangle(BorderPen, new Rectangle(0, 0, this.Width, this.Height));
        }
        #endregion
    }
}