C#简单的通用基础字典实现方法

namespace alif.alifform.commclass
{
    /// <summary>
    ///
    /// </summary>
    public class pagingctrl
    {
        /// <summary>
        /// 页大小
        /// </summary>
        private int _pagesize = 50;

        /// <summary>
        /// 页索引
        /// </summary>
        private int _pageindex = 1;

        /// <summary>
        /// 记录数
        /// </summary>
        private int _recodecount = 0;

        /// <summary>
        /// 页数
        /// </summary>
        private int _pagecount = 0;

        /// <summary>
        /// 回调函数获取要查询数据的xml数据参数
        /// </summary>
        /// <param name="pageindex"></param>
        /// <param name="pagesize"></param>
        /// <returns></returns>
        public delegate string loadxml(int pageindex, int pagesize);

        /// <summary>
        /// 在读取数据后发生的事件，用于通知客户
        /// </summary>
        public delegate void afterdataloaddelegate();

        /// <summary>
        /// 在读取数据前发生的事件，提示客户等待
        /// </summary>
        public delegate void beforedataloaddelegate();

        /// <summary>
        /// 在读取数据发生错误时发生，用于错误处理
        /// </summary>
        public delegate void errordataloaddelegate(string errmsg);

        /// <summary>
        /// 首页按钮
        /// </summary>
        system.windows.forms.button _btfirst;

        /// <summary>
        /// 前页按钮
        /// </summary>
        system.windows.forms.button _btpreview;

        /// <summary>
        /// 下一页按钮
        /// </summary>
        system.windows.forms.button _btnext;

        /// <summary>
        /// 末页按钮
        /// </summary>
        system.windows.forms.button _btlast;

        /// <summary>
        /// 刷新按钮
        /// </summary>
        system.windows.forms.button _btreflesh;

        /// <summary>
        /// 记录数提示label
        /// </summary>
        system.windows.forms.label _msg;

        /// <summary>
        /// 每页记录数combo
        /// </summary>
        system.windows.forms.combobox _compagesize;

        /// <summary>
        /// 当前页索引combo
        /// </summary>
        system.windows.forms.combobox _comtopageindex;

        /// <summary>
        /// 显示数据的datagridview
        /// </summary>
        c1.win.c1flexgrid.c1flexgrid _dv;

        loadxml _loadxml;
        afterdataloaddelegate _afterdataload;
        beforedataloaddelegate _beferdataload;
        errordataloaddelegate _errordataload;

        public string _webseivicecomm = "";

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="btfirst">首页</param>
        /// <param name="btpreview">上一页</param>
        /// <param name="btnext">下一页</param>
        /// <param name="btlast">末页</param>
        /// <param name="btreflesh">刷新</param>
        /// <param name="msg">共x页,记录数：x</param>
        /// <param name="pagesize">页大小</param>
        /// <param name="pageindex">页索引</param>
        /// <param name="dv">显示数据的datagridview</param>
        /// <param name="webseivicecomm">命令编号</param>
        /// <param name="loadxmlcallback">参数</param>
        /// <param name="beferfirecallback">加载之前处理的回调函数</param>
        /// <param name="afterfirecallback">加载之后处理的回调函数</param>
        /// <param name="errorfirecallback">错误处理的回调函数</param>
        public pagingctrl(system.windows.forms.button btfirst,
                                    system.windows.forms.button btpreview,
                                    system.windows.forms.button btnext,
                                    system.windows.forms.button btlast,
                                    system.windows.forms.button btreflesh,
                                    system.windows.forms.label msg,
                                    system.windows.forms.combobox pagesize,
                                    system.windows.forms.combobox pageindex,
                                    c1.win.c1flexgrid.c1flexgrid dv,
                                    string webseivicecomm,
                                    loadxml loadxmlcallback,
                                    beforedataloaddelegate beferfirecallback,
                                    afterdataloaddelegate afterfirecallback,
                                    errordataloaddelegate errorfirecallback)
        {
            _btfirst = btfirst;
            _btpreview = btpreview;
            _btnext = btnext;
            _btlast = btlast;
            _msg = msg;
            _dv = (c1.win.c1flexgrid.c1flexgrid)dv;
            _loadxml = loadxmlcallback;
            _webseivicecomm = webseivicecomm;
            _compagesize = pagesize;
            _comtopageindex = pageindex;
            _btreflesh = btreflesh;
            _beferdataload = beferfirecallback;
            _afterdataload = afterfirecallback;
            _errordataload = errorfirecallback;

            if (_btfirst != null)
            {
                _btfirst.click += new system.eventhandler(this.btfirst_click);
            }
            if (_btpreview != null)
            {
                _btpreview.click += new system.eventhandler(this.btup_click);
            }
            if (_btnext != null)
            {
                _btnext.click += new system.eventhandler(this.btnext_click);
            }
            if (_btlast != null)
            {
                _btlast.click += new system.eventhandler(this.btlast_click);
            }

            if (_compagesize != null)
            {
                _compagesize.selectedindexchanged += new system.eventhandler(compagesize_selectedindexchanged);
            }
            if (_comtopageindex != null)
            {
                _comtopageindex.selectedindexchanged += new eventhandler(comtopageindex_selectedindexchanged);
                _comtopageindex.tag = "";
            }
            if (_btreflesh != null)
            {
                _btreflesh.click += new system.eventhandler(this.btreflesh_click);
            }
        }

        /// <summary>
        /// 调用webservice 方法获取数据
        /// </summary>
        /// <param name="webservicecomm"></param>
        /// <param name="xmlcommand"></param>
        public void loaddata(string webservicecomm, string xmlcommand)
        {
            if (_comtopageindex != null)
            {
                //防止程序重入
                if (_comtopageindex.tag == null || _comtopageindex.tag.tostring() == "1")
                {
                    return;
                }
                _comtopageindex.tag = "1";
            }

            //出发beforefire事件
            if (_beferdataload != null)
            {
                _beferdataload();
            }

            system.data.dataset ds;

            try
            {
                ds = loadwebservicedata(webservicecomm, xmlcommand);

                if (!ds.tables.contains("table0"))
                {
                    if(_dv.datasource!=null)
                    {
                        ((datatable)_dv.datasource).clear();
                    }
                }
                else
                {

                    _dv.datasource = ds.tables["table0"];

                }

                this._pagesize = int32.parse(ds.tables["tabscript"].rows[0]["pagesize"].tostring());
                this._pageindex = int32.parse(ds.tables["tabscript"].rows[0]["pageindex"].tostring());
                this._recodecount = int32.parse(ds.tables["tabscript"].rows[0]["rows"].tostring());
                this._pagecount = this._recodecount / this._pagesize + 1;

                if (_comtopageindex != null)
                {
                    _comtopageindex.items.clear();
                    for (int i = 1; i <= this._pagecount; ++i)
                    {
                        _comtopageindex.items.add(i.tostring());

                    }
                    _comtopageindex.text = this._pageindex.tostring();
                }

                if (_msg != null)
                {
                    _msg.text = "当前第" + this._pageindex + "页," + "共" + this._pagecount.tostring() + "页,记录数：" + this._recodecount.tostring();
                }

                if (_btfirst != null)
                {
                    _btfirst.enabled = this._pageindex <= 1 ? false : true;
                }
                if (_btpreview != null)
                {
                    _btpreview.enabled = _btfirst.enabled;
                }
                if (_btlast != null)
                {
                    _btlast.enabled = this._pageindex >= this._pagecount ? false : true;
                }

                if (_btlast != null)
                {
                    _btlast.enabled = _btlast.enabled;
                }
            }
            catch (exception ex)
            {
                //发生webservice错误
                if (_errordataload != null)
                {
                    _errordataload("连接webservice服务器失败(001)！\n\r错误原因：" + ex.message);
                }
                if (_comtopageindex != null)
                {
                    _comtopageindex.tag = "";
                }
            }

            if (_afterdataload != null)
            {
                _afterdataload();
            }

            if (_comtopageindex != null)
            {
                _comtopageindex.tag = "";
            }
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="xmlcomm"></param>
        public void loaddata(string xmlcomm)
        {
            loaddata(_webseivicecomm, xmlcomm);

        }

        /// <summary>
        ///
        /// </summary>
        public void loaddata()
        {
            loaddata(_webseivicecomm, _loadxml(this._pageindex, this._pagesize));
        }

        /// <summary>
        /// 加载web服务数据
        /// </summary>
        /// <param name="cmdid">命令编号</param>
        /// <param name="para">参数</param>
        /// <returns>数据集</returns>
        private dataset loadwebservicedata(string cmdid, string para)
        {
            int tt;
            string errmsg = "";
            system.data.dataset ds = new dataset();
            try
            {
                tt = webservice.getinstance(commoninfo.logininfo.userparameters).execute("dataservices", cmdid, "1", para, out errmsg, out  ds);
            }
            catch (exception ex)
            {
                //发生webservice错误
                throw new exception("连接webservice服务器失败(001)！\n\r错误原因：" + ex.message);
            }

            if (tt == 1)
            {
                //获取数据成功
                return ds;
            }
            else
            {
                //获取keystring错误
                throw new exception("服务器返回失败信息(002)！\n\r错误原因：" + errmsg);
            }
        }

        /// <summary>
        /// 刷新
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btreflesh_click(object sender, eventargs e)
        {
            loaddata();
        }

        /// <summary>
        /// 下一页
        /// </summary>
        public void nextpage()
        {
            this._btnext.performclick();
        }

        /// <summary>
        /// 下一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnext_click(object sender, eventargs e)
        {
            _pageindex++;
            loaddata();
        }

        /// <summary>
        /// 上一页
        /// </summary>
        public void uppage()
        {
            this._btpreview.performclick();
        }

        /// <summary>
        /// 上一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btup_click(object sender, eventargs e)
        {
            --_pageindex;
            loaddata();
        }

        /// <summary>
        /// 首页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btfirst_click(object sender, eventargs e)
        {
            _pageindex = 1;
            loaddata();
        }

        /// <summary>
        /// 首页
        /// </summary>
        public void firstpage()
        {
            this._btfirst.performclick();
        }

        /// <summary>
        /// 最后一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btlast_click(object sender, eventargs e)
        {
            _pageindex = _pagecount;
            loaddata();
        }

        /// <summary>
        /// 最后一页
        /// </summary>
        public void lastpage()
        {
            this._btlast.performclick();
        }

        /// <summary>
        /// combobox选择改变页号
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void compagesize_selectedindexchanged(object sender, eventargs e)
        {
            this._pagesize = int32.parse(_compagesize.text);
            loaddata();
        }

        /// <summary>
        /// 翻到第几页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void comtopageindex_selectedindexchanged(object sender, eventargs e)
        {
            this._pageindex = int32.parse(_comtopageindex.text);
            loaddata();
        }
    }
}