请叫如何实现弹出一个窗口,其父窗口变灰色(父窗口不可编辑)?

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/// <summary>
/// Msg 的摘要说明
/// </summary>
public class Message
{
    #region 私有变量
    /// <summary>
    /// 提示信息
    /// </summary>
    string _msg = string.Empty;
    /// <summary>
    /// 新增记录的id
    /// </summary>
    string _recordid = string.Empty;
    /// <summary>
    /// 通用执行的js函数
    /// </summary>
    string _commondjs = string.Empty;
    /// <summary>
    /// 记录关键字
    /// </summary>
    string _keyword = "CurId";
    /// <summary>
    /// 自定义按钮集
    /// </summary>    EnumMsgType iMsgType = EnumMsgType.NewEditExit;

    Array _clearField = null;
    NameValueCollection _buttoncollection = new NameValueCollection();
    #endregion    #region 构造函数
    public Message()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }
    /// <summary>
    /// 构造函数
    /// </summary>
    /// <param name="msg">信息</param>
    public Message(string msg)
    {
        this._msg = msg;
    }
    public Message(NameValueCollection btcollection)
    {
        this._buttoncollection = btcollection;
    }
    /// <summary>
    /// 构造函数
    /// </summary>
    /// <param name="msg">提示信息</param>
    /// <param name="coll">自定义按钮集合</param>
    public Message(string msg, NameValueCollection btcollection)
    {
        this._msg = msg;
        this._buttoncollection = btcollection;
    }    #endregion    #region 属性    /// <summary>
    /// 提示信息按钮的默认的几种类型
    /// No  自定义按钮
    /// NewEditExit 新增编辑退出
    /// OkOnly 只有确定按钮
    /// </summary>
    public EnumMsgType MsgType
    {
        get { return iMsgType; }
        set { iMsgType = value; }
    }
    string sMsgTitle = Strings.GetString("MessageTitle");
    /// <summary>
    /// 提示信息的标题
    /// </summary>
    public string MsgTitle
    {
        get { return sMsgTitle.ToLower(); }
        set { sMsgTitle = value; }
    }
    private EnumTipPicType _tipPic;
    /// <summary>
    /// 提示信息显示的图片
    /// </summary>
    public EnumTipPicType TipPic
    {
        get { return _tipPic; }
        set { _tipPic = value; }
    }

    /// <summary>
    /// 新增记录的ID
    /// 默认为 CurId
    /// </summary>
    public string Identity
    {
        set
        {
            this._recordid = value;
            if (string.IsNullOrEmpty(_recordid))
                throw new Exception("请填写新增记录的ID");
        }
    }
    /// <summary>
    /// 获取或设置提示信息内容
    /// </summary>
    public string Msg
    {
        get { return _msg; }
        set { _msg = value; }
    }
    /// <summary>
    /// 记录关键字
    /// </summary>
    public string KeyWord
    {
        get { return _keyword.ToLower(); }
        set { _keyword = value; }
    }
    /// <summary>
    /// 需要清除的字段集合
    /// </summary>
    public Array ClearField
    {
        get { return _clearField; }
        set {_clearField = value;}
    }
    /// <summary>
    /// 通用的执行脚本对象，在增加或修改
    /// 成功后需要操作的对象
    /// </summary>
    public string CommondJS
    {
        set { this._commondjs = value; }
    }
    TargetType _target = TargetType.self;
    /// <summary>
    /// 获取或者设置信息提示的显示Target
    /// </summary>
    public TargetType Target
    {
        get { return _target; }
        set { _target = value; }
    }

    private bool _autoClientShow = true;
    /// <summary>
    /// 设置或获取在信息显示设置为客户端调用的时候
    /// 是否自动触发信息还是手工触发信息，默认是自动的
    /// </summary>
    public bool AutoClientShow
    {
        get { return _autoClientShow; }
        set { _autoClientShow = value; }
    }
    /// <summary>
    /// 提示按钮集合
    /// </summary>
    public NameValueCollection ButtonCollection
    {
        get { return _buttoncollection; }
        set { _buttoncollection = value; }
    }
    #endregion    #region 调用方法
    /// <summary>
    /// 客户端调用显示的Message的方式
    /// </summary>
    /// <param name="client"></param>
    /// <returns></returns>
    public string GetHtml()
    {
        //如果设置图片为警告或者失败时候,只有确定按钮
        if (this.TipPic.Equals(EnumTipPicType.Falsed) || this.TipPic.Equals(EnumTipPicType.Warn))
            this.MsgType = EnumMsgType.OKOnly;        string str ="<script>"+ BuildClientObject();
        if (this._autoClientShow)
        {
            if (string.IsNullOrEmpty(this._commondjs))
                str += ";" + this._target.ToString() + ".MessageShow(MessageCollection,\"" + this._target.ToString() + "\");</script>";
            else
                str += ";" + this._commondjs + ";" + this._target.ToString() + ".MessageShow(MessageCollection,\"" + this._target.ToString() + "\");</script>";
        }
        else
           if (string.IsNullOrEmpty(this._commondjs))
                str += ";" +"</script>";
            else
                str += ";" + this._commondjs + ";" + "</script>";
        return str;
    }

  /// <summary>
    /// 处理Url
    /// </summary>
    /// <param name="type"></param>
    /// <returns></returns>
    private string GetNewUrl(string type)
    {
        string str = string.Empty;
        string oldurl = System.Web.HttpContext.Current.Request.Url.ToString().ToLower() ;
        NameValueCollection urlcollection = System.Web.HttpContext.Current.Request.QueryString;
        oldurl = oldurl.ToLower();
        string currid = urlcollection[this.KeyWord] == null ? "0" : urlcollection[this.KeyWord].Trim();
        switch (type)
        {
            case "add":
                if (currid.Equals("0"))
                    str = oldurl;
                else
                    str = oldurl.Replace(this.KeyWord.ToLower()+"=" + currid.ToLower(), this.KeyWord.ToLower()+"=0");
                if (null != _clearField && _clearField.Length > 0)
                {
                    //新增替换字符
                    string v = "";
                    foreach (string s in _clearField)
                    {
                        v = System.Web.HttpContext.Current.Request.Params[s];
                        if (!string.IsNullOrEmpty(v))
                            str = oldurl.Replace(s.ToLower() + "=" + v, s.ToLower() + "=");
                    }
                }
                break;
            case "modify":
                if (currid.Equals("0"))
                    str = oldurl.Replace(this.KeyWord.ToLower() + "=0", this.KeyWord.ToLower() + "=" + this._recordid);
                else
                    str = oldurl;
                break;
        }
        return str;
    }
    #endregion    #region  创建客户端使用的object对象    /// <summary>
    /// 创建客户端使用的object对象
    /// </summary>
    /// <returns></returns>
    private string BuildClientObject()
    {

        StringBuilder sb = new StringBuilder();
        sb.AppendFormat("var MessageCollection = {{Title:\"{0}\",Tip:\"{1}\",Pic:\"{2}\",Buttons:[",this.sMsgTitle.ToString(),this._msg.ToString(),this.TipPic.ToString());
        switch(iMsgType)
        {
            default:
            case EnumMsgType.NewEditExit:
                sb.AppendFormat("{{Name:\"{0}\",Event:\"window.location.href = '{1}'\"}},", Strings.GetString("Add"), GetNewUrl("add"));
                sb.AppendFormat("{{Name:\"{0}\",Event:\"window.location.href = '{1}'\"}},", Strings.GetString("Modify"), GetNewUrl("modify"));
                sb.AppendFormat("{{Name:\"{0}\",Event:\"try{{closeFlag=true;}}catch(e){{}};top.close()\"}}", Strings.GetString("Exit"));
                break;
            case EnumMsgType.OKOnly:
                sb.AppendFormat("{{Name:\"{0}\",Event:\"\"}}", Strings.GetString("ok"));
                break;
            case EnumMsgType.OKOnlyClose:
                sb.AppendFormat("{{Name:\"{0}\",Event:\"try{{closeFlag=true;}}catch(e){{}};top.close()\"}}", Strings.GetString("ok"));
                break;
            case EnumMsgType.No:
                for (int i = 0; i < this._buttoncollection.Count; i++)
                {
                    sb.AppendFormat("{{Name:\"{0}\",Event:\"{1}\"}},", this._buttoncollection.GetKey(i), this._buttoncollection.GetValues(i)[0]);
                }                //移出多于的一个,号
                if(sb.ToString().EndsWith(","))
                sb.Remove(sb.Length - 1, 1);
                break;
            case EnumMsgType.NewExit:
                sb.AppendFormat("{{Name:\"{0}\",Event:\"window.location.href = '{1}'\"}},", Strings.GetString("Add"), GetNewUrl("add"));
                sb.AppendFormat("{{Name:\"{0}\",Event:\"try{{closeFlag=true;}}catch(e){{}};top.close()\"}}", Strings.GetString("Exit"));
                break;
            case EnumMsgType.Exit:
                sb.AppendFormat("{{Name:\"{0}\",Event:\"try{{closeFlag=true;}}catch(e){{}};top.close()\"}}", Strings.GetString("Exit"));
                break;
            case EnumMsgType.EditExit:
                sb.AppendFormat("{{Name:\"{0}\",Event:\"window.location.href = '{1}'\"}},", Strings.GetString("Modify"), GetNewUrl("modify"));
                sb.AppendFormat("{{Name:\"{0}\",Event:\"try{{closeFlag=true;}}catch(e){{}};top.close()\"}}", Strings.GetString("Exit"));
                break;        }

        sb.Append("]}");
        return sb.ToString();

    }
    /// <summary>
    /// 格式化提示信息
    /// 把单引号替换成双引号
    /// </summary>
    /// <param name="msg">需要格式化的信息</param>
    /// <returns></returns>
    public static string FormatMessage(string msg)
    {
        return msg.Replace("'", "\"");
    }

    #endregion    #region 枚举类型
    /// <summary>
    /// 提示信息类型
    /// </summary>
    public enum EnumMsgType
    {
        /// <summary>
        /// 自定义
        /// </summary>
        No,
        /// <summary>
        /// 新增,编辑,退出
        /// </summary>
        NewEditExit,
        /// <summary>
        /// 确定
        /// </summary>
        OKOnly,        /// <summary>
        /// OKOnly + 关闭窗口
        /// </summary>
        OKOnlyClose,
        /// <summary>
        /// 新增,退出
        /// </summary>
        NewExit,
        /// <summary>
        /// 修改，退出
        /// </summary>
        EditExit,
        /// <summary>
        /// 退出
        /// </summary>
        Exit    }
    /// <summary>
    /// 提示信息图片类型
    /// </summary>
    public enum EnumTipPicType
    {
        /// <summary>
        /// 成功
        /// </summary>
        Successful,
        /// <summary>
        /// 失败如果设置图片为警告或者失败时候,只有确定按钮
        /// </summary>
        Falsed,
        /// <summary>
        /// 警告如果设置图片为警告或者失败时候,只有确定按钮
        /// </summary>
        Warn,
        /// <summary>
        /// 提醒
        /// </summary>
        Remind,
        /// <summary>
        /// 等待
        /// </summary>
        Wait


    }
    /// <summary>
    /// 信息显示位置
    /// 只对客户端调用有效
    /// </summary>
    public enum TargetType
    {
        /// <summary>
        /// 默认,如果AutoClientShow=false,则客户端调用时,不能设置为self
        /// </summary>
        self,
        /// <summary>
        /// 父页面调用
        /// </summary>
        parent,
        /// <summary>
        /// 关联页面的父页面
        /// </summary>
        opener
    }
    #endregion}

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请叫如何实现弹出一个窗口,其父窗口变灰色(父窗口不可编辑)?

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