public class SelectButton: System.Web.UI.WebControls.WebControl,INamingContainer
{
}

protected override void CreateChildControls()
{}

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;


namespace myControls.SelectButton
{
    /**//// <summary>
    /// WebCustomControl1 的摘要说明。
    /// </summary>
    [DefaultProperty("Text"),
        ToolboxData("<{0}:SelectButton1 runat=server></{0}:SelectButton1>")]
    public class SelectButton1: System.Web.UI.WebControls.WebControl,INamingContainer
    {
        private string _select = "选择全部";
        private string _cancel = "取消选择";
        private string _invert = "反向选择";

        [Bindable(false),
        Category("Appearance"),
        DefaultValue("")]

        public string SelectText
        {
            get
            {
                return _select;
            }

            set
            {
                _select = value;
            }
        }
        public string CancelText
        {
            get{
                return _cancel;
            }
            set{
                _cancel = value;
            }
        }
        public string InvertText
        {
            get{
                return _invert;
            }
            set{
                _invert = value;
            }
            
        }
        */
        /**//// <summary>
        /// 重写OnPreRender方法。
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPreRender(EventArgs e) 
        {
            //Page.RegisterPostBackScript();
            string tempstr = "";

            tempstr +="<script language=\"javascript\">";
            tempstr +="    function SelectAll(){";
            tempstr +="        var obj = document.getElementsByTagName(\"input\");";
            tempstr +="        for(i=0;i<obj.length;i++){";
            tempstr +="            if(obj[i].type==\"checkbox\"){";
            tempstr +="                obj[i].checked = true;";
            tempstr +="            }";
            tempstr +="        }";
            tempstr +="        window.event.returnValue=false;";
            tempstr +="    }";
            tempstr +="    function CancelAll(){";
            tempstr +="        var obj = document.getElementsByTagName(\"input\");";
            tempstr +="        for(i=0;i<obj.length;i++){";
            tempstr +="            if(obj[i].type==\"checkbox\"){";
            tempstr +="                obj[i].checked = false;";
            tempstr +="            }";
            tempstr +="        }";
            tempstr +="        window.event.returnValue=false;";
            tempstr +="    }";
            tempstr +="    function InvertAll(){";
            tempstr +="        var obj = document.getElementsByTagName(\"input\");";
            tempstr +="        for(i=0;i<obj.length;i++){";
            tempstr +="            if(obj[i].type==\"checkbox\"){";
            tempstr +="                if(obj[i].checked){";
            tempstr +="                    obj[i].checked = false;";
            tempstr +="                }else{";
            tempstr +="                    obj[i].checked = true;";
            tempstr +="                }";
            tempstr +="            }";
            tempstr +="        }";
            tempstr +="        window.event.returnValue=false;";
            tempstr +="    }";
            tempstr +="</script>";

            if(!Page.IsStartupScriptRegistered("SelectBtnFunction"))
            {
                Page.RegisterStartupScript("SelectBtnFunction",tempstr);
            }
        }

        /**//// <summary>
        /// 重写创建子控件的方法
        /// </summary>
        protected override void CreateChildControls()
        {
            this.Controls.Add(new LiteralControl("<table><tr><td>"));

            Button but1 = new Button();
            but1.Text = this.SelectText;
            but1.Attributes.Add("onclick","javascript:SelectAll()");
            this.Controls.Add(but1);

            this.Controls.Add(new LiteralControl("</td><td>"));

            Button but2 = new Button();
            but2.Text = this.CancelText;
            but2.Attributes.Add("onclick","javascript:CancelAll()");
            this.Controls.Add(but2);

            this.Controls.Add(new LiteralControl("</td><td>"));

            Button but3 = new Button();
            but3.Text = this.InvertText;
            but3.Attributes.Add("onclick","javascript:InvertAll()");
            this.Controls.Add(but3);

            this.Controls.Add(new LiteralControl("</td></tr></table>"));
        }



    }
}