部落格上的月曆控件的初步實作

臨時存放

using  System;

using  System.Collections.Generic;

using  System.Text;

using  System.Web.UI;

using  System.ComponentModel;

namespace  ClassLibrary1

{

    public class  BlogDateControl:System.Web.UI.WebControls.WebControl,System.Web.UI.INamingContainer,System.Web.UI.IPostBackEventHandler   

{

        private static readonly object ClickKey=new object();

        [Description("單擊日期觸發的時間！")]

        public event EventHandler Click

{

            add

{

                Events.AddHandler(ClickKey, value);

            }

            remove

{

                Events.RemoveHandler(ClickKey, value);

            }

        }

        private static readonly string[] header = new string[] 

{ "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };

        private DateTime showDate;

        /// <summary>

        /// Gets or sets the show date.

        /// </summary>

        /// <value>The show date.</value>

        [Description("格式必須為yyyy-MM一樣")] 

        public string ShowDate

{

            get 

{

                if (showDate == null)

                    showDate = Convert.ToDateTime(System.DateTime.Now.Year + "-" + System.DateTime.Now.Month + "-01");

                return showDate.ToString("yyyy-MM"); 

            }

            set 

{

                if (value == null)

{

                    showDate = Convert.ToDateTime(System.DateTime.Now.Year + "-" + System.DateTime.Now.Month + "-01");    

                }

                else

{

                    showDate = Convert.ToDateTime(value+"-01");

                }

            }

        }

        protected override void AddAttributesToRender(HtmlTextWriter writer)

{

            //為table标簽定義屬性和樣式

           // writer.AddAttribute(HtmlTextWriterAttribute.Width, "287px");

            //writer.AddStyleAttribute(HtmlTextWriterStyle.BorderWidth, "1px");

            writer.AddAttribute(HtmlTextWriterAttribute.Border, "1px");

            writer.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "0");

            writer.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0");

            base.AddAttributesToRender(writer);

        }

        /// <summary>

        /// 擷取與此 Web 伺服器控件相對應的 <see cref="T:System.Web.UI.HtmlTextWriterTag"></see> 值。此屬性主要由控件開發人員使用。

        /// </summary>

        /// <value></value>

        /// <returns><see cref="T:System.Web.UI.HtmlTextWriterTag"></see> 枚舉值之一。</returns>

        protected override HtmlTextWriterTag TagKey

{

            get

{

                return HtmlTextWriterTag.Table;

            }

        }

        /// <summary>

        /// 将控件的内容呈現到指定的編寫器中。此方法主要由控件開發人員使用。

        /// </summary>

        /// <param name="writer"><see cref="T:System.Web.UI.HtmlTextWriter"></see>，表示要在用戶端呈現 HTML 内容的輸出流。</param>

        protected override void RenderContents(HtmlTextWriter writer)

{

            writer.RenderBeginTag(HtmlTextWriterTag.Thead);

            writer.RenderBeginTag(HtmlTextWriterTag.Tr);

            writer.AddAttribute(HtmlTextWriterAttribute.Align, "center");

            writer.AddAttribute(HtmlTextWriterAttribute.Colspan, "7");

            writer.RenderBeginTag(HtmlTextWriterTag.Td);

            writer.Write(this.showDate.Year+"年"+this.showDate.Month+"月");

            writer.RenderEndTag();

            writer.RenderEndTag();

            writer.RenderEndTag();

            writer.RenderBeginTag(HtmlTextWriterTag.Tr);

            for (int i = 0; i < BlogDateControl.header.Length; i++)

{

                writer.RenderBeginTag(HtmlTextWriterTag.Td);

                writer.Write(BlogDateControl.header[i]);

                writer.RenderEndTag();

            }

            writer.RenderEndTag();

            DateTime end=this.showDate.AddMonths(1);

            int days=((TimeSpan)end.Subtract(this.showDate)).Days;

            int spaceday = Convert.ToInt32(this.showDate.DayOfWeek);

            writer.RenderBeginTag(HtmlTextWriterTag.Tr);

            for (int i = 0; i < spaceday; i++)

{

                writer.RenderBeginTag(HtmlTextWriterTag.Td);

                writer.WriteLine("&nbsp;");

                writer.RenderEndTag();

            }

            for (int i = 1; i <= days; i++)

{

                writer.Write("<td οnclick=\"");

                writer.Write(Page.GetPostBackEventReference(this, this.ShowDate+"-"+i.ToString().PadLeft(2,'0')));

                writer.Write("\">"+i.ToString()+"</td>");

                //writer.RenderEndTag();

                if ((i + spaceday) % 7 == 0)

{

                    writer.RenderEndTag();

                    writer.RenderBeginTag(HtmlTextWriterTag.Tr);

                }

            }

            if ((spaceday + days) % 7 != 0)

{

                int allcount = spaceday + days > 35 ? 42 : 35;

                for (int i = 0; i < allcount - spaceday - days; i++)

{

                    writer.RenderBeginTag(HtmlTextWriterTag.Td);

                    writer.Write("&nbsp;");

                    writer.RenderEndTag();

                }

                writer.RenderEndTag();

            }

        }

        protected virtual void OnClick(StringEventArgs e)

{

            EventHandler clickEventDelegate =

               (EventHandler)Events[ClickKey];

            if (clickEventDelegate != null)

{

                clickEventDelegate(this, e);

            }

        }

        IPostBackEventHandler 成員#region IPostBackEventHandler 成員

        public void  RaisePostBackEvent(string eventArgument)

{

             //throw new Exception("The method or operation is not implemented.");

            OnClick(new StringEventArgs(eventArgument));

        }

        #endregion

}

    public class StringEventArgs : EventArgs

{

        private string argString;

        public string ArgString

{

            get 

{ return argString; }

        }

        public StringEventArgs(string arg)

{

            this.argString = arg;

        }

        public override string ToString()

{

            return this.argString;

        }

    }

}

轉載于:https://www.cnblogs.com/deadshot123/archive/2007/05/21/753682.html