自定义控件无法激发，附代码。

liydotnet 2008-07-15 04:46:33



    [PersistChildren(false)]

    [DefaultProperty("DataSource")]

    [ParseChildren(true)]

    [ToolboxData("<{0}:Repeater runat=server></{0}:Repeater>")]

    public class Repeater : System.Web.UI.WebControls.Repeater

    {

        public delegate void EventDelete(Object sender, EventArgs e);

        /// <summary>

        /// 删除事件

        /// </summary>

        public event EventDelete ItemDelete;



        public Button _btnDelete = new Button();



        public Repeater()

            : base()

        {

            _btnDelete.Click += new EventHandler(OnDelete);

        }





        [DefaultValue("数据库中无该条件数据！！")]

        [Browsable(true)]

        public string EmptyDataText 

        {

            get

            {

                string s = ViewState["EmptyDataText"] as string;

                return s == null ? "数据库中无该条件数据！！" : s;

            }



            set

            {

                ViewState["EmptyDataText"] = value; 

            }

        }



        [DefaultValue("")]

        [Browsable(true)]

        [Category("Appearance")]

        [Description("删除按钮ID")]

        public string DeleteButtonID

        {

            get 

            {

                string s = ViewState["DeleteButtonID"] as string;

                return s == null ? "bt_delete" : s;

            }

            set { ViewState["DeleteButtonID"] = value; }

        }



        [DefaultValue("")]

        [Browsable(true)]

        [Category("Appearance")]

        [Description("全选框名称")]

        public string CheckBoxName

        {

            get

            {

                string s = ViewState["CheckBoxName"] as string;

                return s == null ? "cb_guid" : s;

            }

            set { ViewState["CheckBoxName"] = value; }

        }







        protected override void Render(HtmlTextWriter writer)

        {

            if (this.Items.Count > 0)

            {

                _btnDelete.ID = this.DeleteButtonID;

                _btnDelete.Text = "删除选中的数据";

                _btnDelete.Width = 150;

                writer.WriteLine("<table cellpadding=\"1\" cellspacing=\"1\" class=\"itemTable\">");

                writer.WriteLine("<tr class=\"delete\">");

                writer.WriteLine("<td>");

                _btnDelete.RenderControl(writer);

                writer.WriteLine("</td>");

                writer.WriteLine("</table>");

            }

            base.Render(writer);

            if (this.Items.Count == 0 && this.DataSource != null)

            {

                StringBuilder sb = new StringBuilder();

                sb.AppendLine("<table cellpadding=\"1\" cellspacing=\"1\" class=\"itemTable\">");

                sb.AppendLine("\t<tr class=\"nodata\">");

                sb.AppendLine("\t\t<td>" + this.EmptyDataText + "</td>");

                sb.AppendLine("\t</tr>");

                sb.AppendLine("</table>");

                writer.Write(sb.ToString());

            }

            StringBuilder str = new StringBuilder();

            str.AppendLine("<script type=\"text/javascript\">");

            str.AppendLine("$(document).ready(function(){");

            str.AppendLine("		$(\"input[@name=" + this.CheckBoxName + "]\").click(function(){");

            str.AppendLine("    		if(this.checked){$(this).parents(\"tr\").addClass(\"selected\");}");

            str.AppendLine("    		else{$(this).parents(\"tr\").removeClass(\"selected\");}");

            str.AppendLine("		});");

            str.AppendLine("		$(\"#"+this._btnDelete.ClientID+"\").click(function(){");

            str.AppendLine("    		var i=0;");

            str.AppendLine("    		$(\"input[@name=" + this.CheckBoxName + "][@checked]\").each(function(){");

            str.AppendLine("        			i++;");

            str.AppendLine("    		});");

            str.AppendLine("    		if(i>0){");

            str.AppendLine("        			return confirm(\"你确定要删除这“\"+i+\"”项吗？\")");

            str.AppendLine("    		}else{");

            str.AppendLine("        			alert(\"无可删除数据\");return false;");

            str.AppendLine("    		}");

            str.AppendLine("      })");

            str.AppendLine("})");

            str.AppendLine("</script>");

            writer.Write(str.ToString());

        }



        protected override void OnItemCreated(RepeaterItemEventArgs e)

        {

            //if (e.Item.ItemType == ListItemType.Header)

            //{

            //    Button bt_delete = e.Item.FindControl(this.DeleteButtonID) as Button;

            //    if (bt_delete != null)

            //    {                    

            //        bt_delete.Click += new EventHandler(OnDelete);

            //    }

            //}           

            base.OnItemCreated(e);

        }



        protected void OnDelete(object sender, EventArgs e)

        {

            if (ItemDelete != null)

            {

                ItemDelete(sender, e);

            }

        }



        

    }