OA系统

开发平台：
C#

DropDownTime.cs：源码内容
							using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
namespace OThinker.H3.WorkSheet
{
	public enum DropDownTimeModal
	{
		Date, 
		SimplifiedTime, 
		Time
	}
	/// <summary>
	/// 这里最好采用继承的方式，因为DropDownCalendar实现了IPostBackDataHandler接口，。
	/// </summary>
	[DefaultProperty("Text"), ToolboxData("<{0}:DropDownTime runat=server></{0}:DropDownTime>")]
	public class DropDownTime : DropDownCalendar
	{
		private DropDownTimeModal _Modal = DropDownTimeModal.Time;
		[Bindable(true),Category("WorkSheet")]
		public DropDownTimeModal Modal
		{
			get
			{
				return this._Modal;
			}
			set
			{
				this._Modal = value;
				switch(this._Modal)
				{
					case DropDownTimeModal.Date:
						this.SimplifiedTimeList.Visible = false;
						this.SimplifiedTimeList.SelectedIndex = 0;
						this.HourList.SelectedIndex = 0;
						this.HourList.Visible = false;
						this.MinuteList.SelectedIndex = 0;
						this.MinuteList.Visible = false;
						this.SecondList.SelectedIndex = 0;
						this.SecondList.Visible = false;
						break;
					case DropDownTimeModal.SimplifiedTime:
						this.SimplifiedTimeList.Visible = true;
						this.HourList.Visible = false;
						this.MinuteList.Visible = false;
						this.SecondList.Visible = false;
						break;
					case DropDownTimeModal.Time:
						this.SimplifiedTimeList.Visible = false;
						this.HourList.Visible = true;
						this.MinuteList.Visible = true;
						this.SecondList.Visible = true;
						break;
					default:
						throw new NotImplementedException();
				}
			}
		}
		// 简化的时间列表
		private DropDownList SimplifiedTimeList = new DropDownList();
		// 小时
		private DropDownList HourList = new DropDownList();
		// 分
		private DropDownList MinuteList = new DropDownList();
		// 妙
		private DropDownList SecondList = new DropDownList();
		public DropDownTime()
		{
			this.Modal = DropDownTimeModal.SimplifiedTime;
			base.Size = "7";
			for(int h=0; h<10; h++)
			{
				this.SimplifiedTimeList.Items.Add("0" + h + ":" + "00");
				this.SimplifiedTimeList.Items.Add("0" + h + ":" + "30");
			}
			for(int h=10; h<24; h++)
			{
				this.SimplifiedTimeList.Items.Add(h + ":" + "00");
				this.SimplifiedTimeList.Items.Add(h + ":" + "30");
			}
			this.Controls.Add(this.SimplifiedTimeList);
			for(int count=0; count<24; count++)
			{
				this.HourList.Items.Add(count.ToString());
			}
			this.Controls.Add(this.HourList);
			for(int count=0; count<60; count++)
			{
				this.MinuteList.Items.Add(count.ToString());
			}
			this.Controls.Add(this.MinuteList);
			for(int count=0; count<60; count++)
			{
				this.SecondList.Items.Add(count.ToString());
			}
			this.Controls.Add(this.SecondList);
		}
		[Browsable(false)]
		public System.DateTime TimeValue
		{
			get
			{
				try
				{
					string date;
					switch(this.Modal)
					{
						case DropDownTimeModal.Date:
							return System.DateTime.Parse(base.Text);
						case DropDownTimeModal.SimplifiedTime:
							date = base.Text + " " + this.SimplifiedTimeList.SelectedValue;
							return System.DateTime.Parse(date);
						case DropDownTimeModal.Time:
							date = base.Text;
							int hour = int.Parse(this.HourList.SelectedValue);
							int minute = int.Parse(this.MinuteList.SelectedValue);
							int second = int.Parse(this.SecondList.SelectedValue);
							string time = date + " " + hour + ":" + minute + ":" + second;
							return System.DateTime.Parse(time);
						default:
							throw new NotImplementedException();
					}
				}
				catch
				{
					return System.DateTime.Now;
				}
			}
			set
			{
				base.Text = value.ToShortDateString();
				switch(this.Modal)
				{
					case DropDownTimeModal.Date:
						break;
					case DropDownTimeModal.SimplifiedTime:
						// 找到一个最接近的时间
						ListItem nearestItem = null;
						System.TimeSpan nearestInterval = System.TimeSpan.MaxValue;
						foreach(ListItem item in this.SimplifiedTimeList.Items)
						{
							string date = base.Text + " " + item.Value;
							System.DateTime itemDate = System.DateTime.Parse(date);
							System.TimeSpan interval;
							if(itemDate > value)
							{
								interval = itemDate.Subtract(value);
							}
							else
							{
								interval = value.Subtract(itemDate);
							}
							if(interval < nearestInterval)
							{
								nearestInterval = interval;
								nearestItem = item;
							}
						}
						// 设置最近的这个值
						this.SimplifiedTimeList.SelectedValue = nearestItem.Value;
						break;
					case DropDownTimeModal.Time:
						this.HourList.SelectedValue = value.Hour.ToString();
						this.MinuteList.SelectedValue = value.Minute.ToString();
						this.SecondList.SelectedValue = value.Second.ToString();
						break;
					default:
						throw new NotImplementedException();
				}
			}
		}
		[Browsable(false)]
		public string TextValue
		{
			get
			{
				return this.TimeValue.ToString();
			}
			set
			{
				this.TimeValue = System.DateTime.Parse(value);
			}
		}
		protected override void Render(HtmlTextWriter writer)
		{
			base.Render (writer);
			this.SimplifiedTimeList.RenderControl(writer);
			this.HourList.RenderControl(writer);
			this.MinuteList.RenderControl(writer);
			this.SecondList.RenderControl(writer);
		}
	}
}

						