=====data发表于技术|13:8:0

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.ComponentModel.Design;
public class TimeSelect : System.Web.UI.WebControls.WebControl, INamingContainer
{
//变量定义
#region
private System.Web.UI.WebControls.DropDownList ddlYear;
private DropDownList ddlMonth;
private DropDownList ddlDay;
private DropDownList ddlHour;
private DropDownList ddlMinute;
private DropDownList ddlSecond;

private static int beginYear = 0; //起始年号，这里必须使用static以防二次调用后变量被清零
#endregion

//控件属性
#region

[Bindable(true), Category("Appearance"), Defaultvalue("")]
public int Year //取控件时间：年
{
get
{
return ddlYear.SelectedIndex + beginYear;
}
set
{
ddlYear.SelectedIndex = value - beginYear;
}
}

public int Month //取控件时间：月
{
get
{
return ddlMonth.SelectedIndex + 1;
}
set
{
ddlMonth.SelectedIndex = value - 1;
}
}

public int Day //取控件时间：日
{
get
{
return ddlDay.SelectedIndex + 1;
}
set
{
ddlDay.SelectedIndex = value - 1;
}
}

public int Hour //取控件时间：时
{
get
{
return ddlHour.SelectedIndex;
}
set
{
ddlHour.SelectedIndex = value;
}
}

public int Minute //取控件时间：分
{
get
{
return ddlMinute.SelectedIndex;
}
set
{
ddlMinute.SelectedIndex = value;
}
}

public int Second //取控件时间：秒
{
get
{
return ddlSecond.SelectedIndex;
}
set
{
ddlSecond.SelectedIndex = value;
}
}

//重载Controls属性，取得ControlCollection对象，该对象表示UI层次结构中的服务器控件的子控件
public override ControlCollection Controls
{
get
{
//确定服务器是否包含子控件
EnsureChildControls();
return base.Controls;
}
}

#endregion

//重写函数
#region
///
/// 动态创建子控件，并把子控件添加到控件中去
///
protected override void CreateChildControls()
{
//创建年、月、日、时、分、秒下拉列表框
this.Controls.Clear();
ddlYear = new DropDownList();
ddlYear.ID = "ddlYear";
ddlYear.Width = 54;

ddlMonth = new DropDownList();
ddlMonth.ID = "ddlMonth";
ddlMonth.Width = 40;

ddlDay = new DropDownList();
ddlDay.ID = "ddlDay";
ddlDay.Width = 40;

ddlHour = new DropDownList();
ddlHour.ID = "ddlHour";
ddlHour.Width = 40;

ddlMinute = new DropDownList();
ddlMinute.ID = "ddlMinute";
ddlMinute.Width = 40;

ddlSecond = new DropDownList();
ddlSecond.ID = "ddlSecond";
ddlSecond.Width = 40;

this.Controls.Add(ddlYear);
this.Controls.Add(ddlMonth);
this.Controls.Add(ddlDay);
this.Controls.Add(ddlHour);
this.Controls.Add(ddlMinute);
this.Controls.Add(ddlSecond);

base.CreateChildControls ();
}

///
/// 初始化控件，使控件被拖到设计界面时能立刻显示出来
///
///
protected override void OnInit(EventArgs e)
{
EnsureChildControls();
base.OnInit (e);
}

///
/// 将此控件呈现给指定的输出参数。
///
/// 要写出到的 HTML 编写器
protected override void Render(HtmlTextWriter output)
{
//将要呈现的HTML属性添加到指定的System.Web.HtmlTextWriter中
AddAttributesToRender(output);
output.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Cellpadding, "0", false);

//制定一个表，把子控件排在一行上
output.RenderBeginTag(HtmlTextWriterTag.Table); //表
output.RenderBeginTag(HtmlTextWriterTag.Tr); //行

//年下拉列表框
output.RenderBeginTag(HtmlTextWriterTag.Td); //列
ddlYear.RenderControl(output);
output.RenderEndTag();

output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("年");
output.RenderEndTag();

//月下拉列表框
output.RenderBeginTag(HtmlTextWriterTag.Td);
ddlMonth.RenderControl(output);
output.RenderEndTag();

output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("月");
output.RenderEndTag();

//日下拉列表框
output.RenderBeginTag(HtmlTextWriterTag.Td);
ddlDay.RenderControl(output);
output.RenderEndTag();

output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("日");
output.RenderEndTag();

//时下拉列表框
output.RenderBeginTag(HtmlTextWriterTag.Td);
ddlHour.RenderControl(output);
output.RenderEndTag();

output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("时");
output.RenderEndTag();

//分下拉列表框
output.RenderBeginTag(HtmlTextWriterTag.Td);
ddlMinute.RenderControl(output);
output.RenderEndTag();

output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("分");
output.RenderEndTag();

//秒下拉列表框
output.RenderBeginTag(HtmlTextWriterTag.Td);
ddlSecond.RenderControl(output);
output.RenderEndTag();

output.RenderBeginTag(HtmlTextWriterTag.Td);
output.Write("秒");
output.RenderEndTag();

output.RenderEndTag();
output.RenderEndTag();
}

#endregion

//函数定义
#region
///
/// 用起始年号初始化控件
///
/// 起始年号
/// 终止年号
public void InitControls(int startYear, int endYear)
{
EnsureChildControls();
if (startYear > endYear)
{
int tmp = startYear;
startYear = endYear;
endYear = startYear;
}
beginYear = startYear;
for (int i = startYear; i
/// 取得选定的时间
///
/// 选定时间
public DateTime GetTime()
{
DateTime time = new DateTime(this.Year, this.Month, this.Day, this.Hour, this.Minute, this.Second, 0);
return time;
}

///
/// 清除控件里所有下拉列表框的值
///
public void ClearControls()
{
ddlYear.Items.Clear();
ddlMonth.Items.Clear();
ddlDay.Items.Clear();
ddlHour.Items.Clear();
ddlMinute.Items.Clear();
ddlSecond.Items.Clear();
}

///
/// 撤消对所有下拉列表框的选项
///
public void ClearSelection()
{
ddlYear.ClearSelection();
ddlMonth.ClearSelection();
ddlDay.ClearSelection();
ddlHour.ClearSelection();
ddlMinute.ClearSelection();
ddlSecond.ClearSelection();
}
#endregion
}

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