弹出式模态窗体选择文本控件

using System;
using System.ComponentModel;
using System.Text;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;

namespace DotnetClubPortal.WebControls
{
    /// <summary>
    /// 用户选择控件
    /// </summary>
    [DefaultProperty("Text"), 
    ToolboxData("<{0}:SelectObject runat=server></{0}:SelectObject>")]
    public class SelectObject: ,INamingContainer
    {
        protected System.Web.UI.HtmlControls.HtmlInputHidden hiddenObjectId;
        protected System.Web.UI.WebControls.TextBox txtObjectName;
        protected System.Web.UI.WebControls.Button button;


        private HtmlTable uiTable;

        public SelectObject()
        {
            txtObjectName = new Textbox();
          hiddenObjectId= new HtmlInputHidden();
        }

        /// <summary>
        /// ID,ID中间使用","分隔
        /// </summary>
        [Browsable(false),Category("设置"),Description("取得的对象值，中间使用','分隔"),DefaultValue("")]
        public string ObjectId
        {
            get
            {
                return hiddenObjectId.Value;
            }
            set
            {
                hiddenObjectId.Value=value.ToString();
            }
        }

        /// <summary>
        /// 名称，中间使用","分隔
        /// </summary>
        [Browsable(false),Category("设置"),Description("对象名称，中间使用','分隔"),DefaultValue("")]
        public string ObjectName
        {
            get
            {
                return txtObjectName.Text;
            }
            set
            {
                this.txtObjectName.Text = value.ToString();
            }
        }

        [Category("设置"),Description("选择页面路径"),Browsable(true),    NotifyParentProperty(true)]
        public string PageUrl
        {
            get
            {
                object obj=ViewState["PageUrl"];
                return (obj==null)?string.Empty:obj.ToString();
            }
            set
            {
                ViewState["PageUrl"] = value;
            }
        }

        /// <summary>
        /// 编辑框是否可见
        /// </summary>
        [Category("设置"),Description("编辑框是否可见"),Browsable(true),DefaultValue(true)]
        public bool IsVisable
        {
            get
            {
                object obj=ViewState["Visable"];
                return (obj==null)?false:bool.Parse(obj.ToString());
            }
            set
            {
                ViewState["Visable"] = value;
            }
        }

        protected override void Render(HtmlTextWriter output)
        {
            base.Render(output);
            Control [] CtrlArray;
            CtrlArray = new Control [ 3];
            CtrlArray[0] = this.hiddenObjectId;
            CtrlArray[1] = this.txtObjectName;
            CtrlArray[2] = this.button;
            CreateTabeRow(CtrlArray);
        }

    

        /// <summary>
        /// 创建行
        /// </summary>
        /// <param name="Obj">行中包含的控件</param>
        private void CreateTabeRow(Control [] Obj)
        {
            HtmlTableRow tr = new HtmlTableRow();
            HtmlTableCell td = new HtmlTableCell();
            foreach (Control c in Obj)
            {
                if (c != null)
                {
                    td.Controls.Add(c);
                }
                
            }            
            tr.Cells.Add(td);
            uiTable.Rows.Add(tr);
        }

        protected override void OnPreRender(EventArgs e)
        {
            RegisterClientScriptBlockJavaScript();
            base.OnPreRender (e);
        }

        #region 发出客户端脚本 RegisterClientScriptBlockJavaScript()
        private void RegisterClientScriptBlockJavaScript()
        {
            //如果已经注册了脚本则不再注册
            if(Page.ClientScript.IsClientScriptBlockRegistered("SetValue"))
            {
                return;
            }
            else
            {
                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "SetValue",SetValue().ToString());
            }

        }

        public StringBuilder SetValue()
        {
            StringBuilder builder=new StringBuilder();
            builder.Append("<script language=\"javascript\">\n");
            builder.Append("  function SetValue(Url,Name,Id){\n");
            builder.Append("      var vDialog;\n");
            builder.Append("      vDialog = window.showModalDialog(Url ,window,\"dialogHeight:500px;dialogWidth:320px;status:no;resizable:yes;scroll:no;\");\n");
            builder.Append("      if (vDialog != null){");
            builder.Append("if(document.getElementById(Name))document.getElementById(Name).value  = vDialog.oSelectName;\n");
            builder.Append("if(document.getElementById(Id))document.getElementById(Id).value  = vDialog.oSelectNameID;\n");
            builder.Append("}}</script>\n");
            return builder;

        }

        #endregion

        protected override void CreateChildControls()
        {
            uiTable = new HtmlTable();
            uiTable.ID = "uiTable";
            uiTable.Width = "100%";
            uiTable.Border = 0;

            //txtObjectName = new TextBox();
            txtObjectName.ID = "ObjectName";
            txtObjectName.Visible = this.IsVisable;
            
            //hiddenObjectId= new HtmlInputHidden();
            hiddenObjectId.ID = "ObjectId";

            this.button = new Button();
            this.button.ID = "btnSelect";
            this.button.Attributes.Add("width","100");
            this.button.Text = "选择";
            this.button.Attributes.Add("onclick",string.Format("javascript:SetValue('{0}','{1}','{2}');",PageUrl,this.ClientID +"_ObjectName",this.ClientID+"_ObjectId"));
            this.button.CausesValidation = false;
            
            this.Controls.Add(uiTable);
            this.Controls.Add(hiddenObjectId);
            this.Controls.Add(txtObjectName);
            this.Controls.Add(button);
        }
    }
}

            <cc1:SelectObject ID="PowerFlag" IsVisable="true" PageUrl="../../../../CommonPage/GetGroupInfo.aspx" runat="server">
            </cc1:SelectObject>