关于b/s开发的时候一个常用的日历返回值的控件！

具体代码为

using System;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.ComponentModel;
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using System.Drawing;
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namespace myCalendar
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{
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/// <summary>
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/// WebCustomControl1 的摘要说明。
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/// </summary>
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[DefaultProperty("Text"),
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ToolboxData("<{0}:DatePicker runat=server></{0}:DatePicker >")]
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public class DatePicker : System.Web.UI.WebControls.WebControl, IPostBackEventHandler
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{
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//选择日期按钮的默认样式
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　　 private const string _BUTTONDEFAULTSTYLE = "BORDER-RIGHT: gray 1px solid; BORDER-TOP: gray 1px solid; BORDER-LEFT: gray 1px solid; CURSOR: hand; BORDER-BOTTOM: gray 1px solid;";
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　　 //按钮默认文本
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　　 private const string _BUTTONDEFAULTTEXT = "

";
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　　 private System.Web.UI.WebControls.Calendar _Calendar;
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public override ControlCollection Controls
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{
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get
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{
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EnsureChildControls(); //确认子控件集都已被创建
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return base.Controls;
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}
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}
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//创建子控件（服务器日历控件）
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protected override void CreateChildControls()
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{
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Controls.Clear();
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_Calendar = new Calendar();
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_Calendar.ID = MyCalendarID;
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_Calendar.SelectedDate = DateTime.Parse(Text);
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_Calendar.TitleFormat = TitleFormat.MonthYear;
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_Calendar.NextPrevFormat = NextPrevFormat.ShortMonth;
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_Calendar.CellSpacing = 0;
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_Calendar.Font.Size = FontUnit.Parse("9pt");
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_Calendar.Font.Name = "Verdana";
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_Calendar.SelectedDayStyle.BackColor = ColorTranslator.FromHtml("#333399");
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_Calendar.SelectedDayStyle.ForeColor = ColorTranslator.FromHtml("White");
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_Calendar.DayStyle.BackColor = ColorTranslator.FromHtml("#CCCCCC");
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_Calendar.TodayDayStyle.BackColor = ColorTranslator.FromHtml("#999999");
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_Calendar.TodayDayStyle.ForeColor = ColorTranslator.FromHtml("Aqua");
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_Calendar.DayHeaderStyle.Font.Size = FontUnit.Parse("8pt");
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_Calendar.DayHeaderStyle.Font.Bold = true;
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_Calendar.DayHeaderStyle.Height = Unit.Parse("8pt");
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_Calendar.DayHeaderStyle.ForeColor = ColorTranslator.FromHtml("#333333");
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_Calendar.NextPrevStyle.Font.Size = FontUnit.Parse("8pt");
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_Calendar.NextPrevStyle.Font.Bold = true;
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_Calendar.NextPrevStyle.ForeColor = ColorTranslator.FromHtml("White");
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_Calendar.TitleStyle.Font.Size = FontUnit.Parse("12pt");
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_Calendar.TitleStyle.Font.Bold = true;
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_Calendar.TitleStyle.Height = Unit.Parse("12pt");
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_Calendar.TitleStyle.ForeColor = ColorTranslator.FromHtml("White");
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_Calendar.TitleStyle.BackColor = ColorTranslator.FromHtml("#333399");
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_Calendar.OtherMonthDayStyle.ForeColor = ColorTranslator.FromHtml("#999999");
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_Calendar.NextPrevFormat = NextPrevFormat.CustomText;
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_Calendar.NextMonthText = "下月";
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_Calendar.PrevMonthText = "上月";
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_Calendar.Style.Add("display","none"); //默认不显示下拉日历控件
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_Calendar.SelectionChanged += new EventHandler(_Calendar_SelectionChanged);
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this.Controls.Add(_Calendar);
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}
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[
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Category("Appearance"), //该属性所属类别
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DefaultValue(""), //属性默认值
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Description("设置该日期控件的值。") //属性的描述
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]
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public string Text
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{
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get
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{
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EnsureChildControls();
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return (ViewState["Text"] == null)?System.DateTime.Today.ToString("yyyy-MM-dd"):ViewState["Text"].ToString();
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}
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set
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{
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EnsureChildControls();
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DateTime dt = System.DateTime.Today;
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try
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{
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dt = DateTime.Parse(value);
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}
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catch
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{
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throw new ArgumentOutOfRangeException("请输入日期型字符串（例如：1981-04-29）！");
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}
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ViewState["Text"] = dt.ToString("yyyy-MM-dd");
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}
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}
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//重载服务器控件的Enabled属性，将选择日期按钮变灰（禁用）
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public override bool Enabled
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{
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get
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{
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EnsureChildControls();
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return ViewState["Enabled"] == null?true:(bool)ViewState["Enabled"];
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}
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set
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{
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EnsureChildControls();
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ViewState["Enabled"] = value;
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}
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}
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public string ButtonStyle
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{
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get
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{
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EnsureChildControls();
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object o = ViewState["ButtonSytle"];
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return (o == null)?_BUTTONDEFAULTSTYLE:o.ToString();
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}
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set
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{
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EnsureChildControls();
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ViewState["ButtonSytle"] = value;
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public string MyCalendarID //复合控件ID
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{
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get
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{
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EnsureChildControls();
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return this.ClientID+"_MyCalendar";
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public string MyCalendarName //复合控件名称
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{
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get
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{
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EnsureChildControls();
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return this.UniqueID+":MyCalendar";
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public string DatePickerInputID //复合控件中输入框的ID
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{
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get
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{
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EnsureChildControls();
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return this.ClientID+"_DateInput";
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public string DatePickerInputName //复合控件中输入框的名称
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{
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get
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{
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EnsureChildControls();
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return this.UniqueID+":DateInput";
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public string DatePickerButtonID //复合控件中按钮的ID
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{
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get
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{
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EnsureChildControls();
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return this.ClientID+"_DateButton";
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public string DatePickerButtonName //复合控件中按钮的名称
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{
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get
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{
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EnsureChildControls();
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return this.UniqueID+":DateButton";
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}
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}
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public string ButtonText
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{
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get
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{
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EnsureChildControls();
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return ViewState["ButtonText"] == null?_BUTTONDEFAULTTEXT:(string)ViewState["ButtonText"];
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}
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set
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{
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EnsureChildControls();
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ViewState["ButtonText"] = value;
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}
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}
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/// <summary>
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/// /// 将此控件呈现给指定的输出参数。
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/// </summary>
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/// /// <param name="output"> 要写出到的 HTML 编写器 </param>
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///
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protected override void Render(HtmlTextWriter output)
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{
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//在页面中输出控件时，产生一个表格（二行二列），以下是表格的样式
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output.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0");
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output.AddAttribute(HtmlTextWriterAttribute.Border, "0");
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output.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "0");
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output.AddStyleAttribute("LEFT", this.Style["LEFT"]);
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output.AddStyleAttribute("TOP", this.Style["TOP"]);
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output.AddStyleAttribute("POSITION", "absolute");
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if (Width != Unit.Empty)
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{
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output.AddStyleAttribute(HtmlTextWriterStyle.Width, Width.ToString());
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}
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else
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{
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output.AddStyleAttribute(HtmlTextWriterStyle.Width, "200px");
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}
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output.RenderBeginTag(HtmlTextWriterTag.Table); //输出表格
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output.RenderBeginTag(HtmlTextWriterTag.Tr); //表格第一行
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output.AddAttribute(HtmlTextWriterAttribute.Width, "90%");
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output.RenderBeginTag(HtmlTextWriterTag.Td);
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//以下是第一行第一列中文本框的属性及其样式设置
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if (!Enabled)
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{
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output.AddAttribute(HtmlTextWriterAttribute.ReadOnly, "true");
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}
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output.AddAttribute(HtmlTextWriterAttribute.Type, "Text");
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output.AddAttribute(HtmlTextWriterAttribute.Id, DatePickerInputID);
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output.AddAttribute(HtmlTextWriterAttribute.Name, DatePickerInputName);
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output.AddAttribute(HtmlTextWriterAttribute.Value, Text);
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output.AddStyleAttribute(HtmlTextWriterStyle.Width, "100%");
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output.AddStyleAttribute(HtmlTextWriterStyle.Height, "100%");
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output.AddStyleAttribute(HtmlTextWriterStyle.FontFamily, Font.Name);
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output.AddStyleAttribute(HtmlTextWriterStyle.FontSize, Font.Size.ToString());
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output.AddStyleAttribute(HtmlTextWriterStyle.FontWeight, Font.Bold?"bold":"");
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output.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, ColorTranslator.ToHtml(BackColor));
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output.AddStyleAttribute(HtmlTextWriterStyle.Color, ColorTranslator.ToHtml(ForeColor));
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output.RenderBeginTag(HtmlTextWriterTag.Input); //输出文本框
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output.RenderEndTag();
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output.RenderEndTag();
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output.AddAttribute(HtmlTextWriterAttribute.Width, "*");
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output.RenderBeginTag(HtmlTextWriterTag.Td);
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//以下是第一行第二列中按钮的属性及其样式设置
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if (!Enabled)
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{
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output.AddAttribute(HtmlTextWriterAttribute.Disabled, "true");
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}
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output.AddAttribute(HtmlTextWriterAttribute.Type, "Submit");
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output.AddAttribute(HtmlTextWriterAttribute.Id, DatePickerButtonID);
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output.AddAttribute(HtmlTextWriterAttribute.Name, DatePickerButtonName);
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output.AddAttribute(HtmlTextWriterAttribute.Value, ButtonText);
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output.AddStyleAttribute(HtmlTextWriterStyle.Width, "100%");
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output.AddAttribute(HtmlTextWriterAttribute.Onclick, Page.GetPostBackEventReference(this)); //点击按钮时需要回传服务器来触发后面的OnClick事件
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output.AddAttribute(HtmlTextWriterAttribute.Style, ButtonStyle);
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output.RenderBeginTag(HtmlTextWriterTag.Input); //输出按钮
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output.RenderEndTag();
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output.RenderEndTag();
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output.RenderEndTag();
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output.RenderBeginTag(HtmlTextWriterTag.Tr);
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output.AddAttribute(HtmlTextWriterAttribute.Colspan, "2");
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output.RenderBeginTag(HtmlTextWriterTag.Td);
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_Calendar.RenderControl(output); //将日历子控件输出
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output.RenderEndTag();
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output.RenderEndTag();
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output.RenderEndTag();
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}
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//复合控件必须继承IpostBackEventHandler接口，才能继承RaisePostBackEvent事件
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public void RaisePostBackEvent(string eventArgument)
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{
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OnClick(EventArgs.Empty);
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}
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protected virtual void OnClick(EventArgs e)
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{
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//点击选择日期按钮时，如果日历子控件没有显示则显示出来并将文本框的值赋值给日历子控件
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if (_Calendar.Attributes["display"] != "")
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{
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_Calendar.SelectedDate = DateTime.Parse(Text);
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_Calendar.Style.Add("display","");
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}
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}
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//复合控件中的日历控件日期变化事件
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private void _Calendar_SelectionChanged(object sender, EventArgs e)
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{
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//当选择的日期变化时，将所选日期赋值给文本框并将日历子控件隐藏
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Text = _Calendar.SelectedDate.ToString();
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_Calendar.Style.Add("display","none");
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}
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}
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}
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posted on 2006-07-12 17:36 小潘阅读(451) 评论(0) 收藏举报

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