Extjs PagingToolbar 当前页设置 PagingToolbar.js

 Ext.grid.GridPanel 修改了某页上的数据之后，刷新当前页面，并返回当前页面：

store.baseParams['sql']=encodeURI(docsearchsql);
 //store.load({params:{start:0,limit:15}});
store.load({params:{start: pagingtoolbar.cursor, limit: pagingtoolbar.pageSize}});
         

使用PagingToolbar的cursor属性获取当前的页码开始的记录数。

参见PagingToolbar.js:

 onClick : function(which){
        var ds = this.ds;
        switch(which){
            case "first":
                ds.load({params:{start: 0, limit: this.pageSize}});
            break;
            case "prev":
                ds.load({params:{start: Math.max(0, this.cursor-this.pageSize), limit: this.pageSize}});
            break;
            case "next":
                ds.load({params:{start: this.cursor+this.pageSize, limit: this.pageSize}});
            break;
            case "last":
                var total = ds.getTotalCount();
                var extra = total % this.pageSize;
                var lastStart = extra ? (total - extra) : total-this.pageSize;
                ds.load({params:{start: lastStart, limit: this.pageSize}});
            break;
            case "refresh":
                ds.load({params:{start: this.cursor, limit: this.pageSize}});
            break;
        }
    }

 

另：网上搜到的获得当前页（第几页）方法：（没有测试过）

grid.getBottomToolbar().getPageData().activePage  

 

 

 附PagingToolbar.js

 

/** * @class Ext.PagingToolbar * @extends Ext.Toolbar * A specialized toolbar that is bound to a {@link Ext.data.Store} and provides automatic paging controls. * @constructor * Create a new PagingToolbar * @param {String/HTMLElement/Element} container The id or element that will contain the toolbar * @param {Ext.data.Store} store The underlying data store providing the paged data * @param {Object} config The config object */Ext.PagingToolbar = function(el, ds, config){    Ext.PagingToolbar.superclass.constructor.call(this, el, null, config);    this.ds = ds;    this.cursor = 0;    this.renderButtons(this.el);    this.bind(ds);};Ext.extend(Ext.PagingToolbar, Ext.Toolbar, {    /**     * @cfg {Boolean} displayInfo     * True to display the displayMsg (defaults to false)     */// holder/***     * @cfg {Number} pageSize     * The number of records to display per page (defaults to 20)     */    pageSize: 20,    /**     * @cfg {String} displayMsg     * The paging status message to display (defaults to "Displaying {start} - {end} of {total}")     */    displayMsg : 'Displaying {0} - {1} of {2}',    /**     * @cfg {String} emptyMsg     * The message to display when no records are found (defaults to "No data to display")     */    emptyMsg : 'No data to display',    /**     * Customizable piece of the default paging text (defaults to "Page")     * @type String     */    beforePageText : "Page",    /**     * Customizable piece of the default paging text (defaults to "of %0")     * @type String     */    afterPageText : "of {0}",    /**     * Customizable piece of the default paging text (defaults to "First Page")     * @type String     */    firstText : "First Page",    /**     * Customizable piece of the default paging text (defaults to "Previous Page")     * @type String     */    prevText : "Previous Page",    /**     * Customizable piece of the default paging text (defaults to "Next Page")     * @type String     */    nextText : "Next Page",    /**     * Customizable piece of the default paging text (defaults to "Last Page")     * @type String     */    lastText : "Last Page",    /**     * Customizable piece of the default paging text (defaults to "Refresh")     * @type String     */    refreshText : "Refresh",    // private    renderButtons : function(el){        Ext.PagingToolbar.superclass.render.call(this, el);        this.first = this.addButton({            tooltip: this.firstText,            cls: "x-btn-icon x-grid-page-first",            disabled: true,            handler: this.onClick.createDelegate(this, ["first"])        });        this.prev = this.addButton({            tooltip: this.prevText,            cls: "x-btn-icon x-grid-page-prev",            disabled: true,            handler: this.onClick.createDelegate(this, ["prev"])        });        this.addSeparator();        this.add(this.beforePageText);        this.field = Ext.get(this.addDom({           tag: "input",           type: "text",           size: "3",           value: "1",           cls: "x-grid-page-number"        }).el);        this.field.on("keydown", this.onPagingKeydown, this);        this.field.on("focus", function(){this.dom.select();});        this.afterTextEl = this.addText(String.format(this.afterPageText, 1));        this.field.setHeight(18);        this.addSeparator();        this.next = this.addButton({            tooltip: this.nextText,            cls: "x-btn-icon x-grid-page-next",            disabled: true,            handler: this.onClick.createDelegate(this, ["next"])        });        this.last = this.addButton({            tooltip: this.lastText,            cls: "x-btn-icon x-grid-page-last",            disabled: true,            handler: this.onClick.createDelegate(this, ["last"])        });        this.addSeparator();        this.loading = this.addButton({            tooltip: this.refreshText,            cls: "x-btn-icon x-grid-loading",            handler: this.onClick.createDelegate(this, ["refresh"])        });        if(this.displayInfo){            this.displayEl = Ext.fly(this.el.dom.firstChild).createChild({cls:'x-paging-info'});        }    },    // private    updateInfo : function(){        if(this.displayEl){            var count = this.ds.getCount();            var msg = count == 0 ?                this.emptyMsg :                String.format(                    this.displayMsg,                    this.cursor+1, this.cursor+count, this.ds.getTotalCount()                    );            this.displayEl.update(msg);        }    },    // private    onLoad : function(ds, r, o){       this.cursor = o.params ? o.params.start : 0;       var d = this.getPageData(), ap = d.activePage, ps = d.pages;       this.afterTextEl.el.innerHTML = String.format(this.afterPageText, d.pages);       this.field.dom.value = ap;       this.first.setDisabled(ap == 1);       this.prev.setDisabled(ap == 1);       this.next.setDisabled(ap == ps);       this.last.setDisabled(ap == ps);       this.loading.enable();       this.updateInfo();    },    // private    getPageData : function(){        var total = this.ds.getTotalCount();        return {            total : total,            activePage : Math.ceil((this.cursor+this.pageSize)/this.pageSize),            pages :  total < this.pageSize ? 1 : Math.ceil(total/this.pageSize)        };    },    // private    onLoadError : function(){        this.loading.enable();    },    // private    onPagingKeydown : function(e){        var k = e.getKey();        var d = this.getPageData();        if(k == e.RETURN){            var v = this.field.dom.value, pageNum;            if(!v || isNaN(pageNum = parseInt(v, 10))){                this.field.dom.value = d.activePage;                return;            }            pageNum = Math.min(Math.max(1, pageNum), d.pages) - 1;            this.ds.load({params:{start: pageNum * this.pageSize, limit: this.pageSize}});            e.stopEvent();        }        else if(k == e.HOME || (k == e.UP && e.ctrlKey) || (k == e.PAGEUP && e.ctrlKey) || (k == e.RIGHT && e.ctrlKey) || k == e.END || (k == e.DOWN && e.ctrlKey) || (k == e.LEFT && e.ctrlKey) || (k == e.PAGEDOWN && e.ctrlKey))        {          var pageNum = (k == e.HOME || (k == e.DOWN && e.ctrlKey) || (k == e.LEFT && e.ctrlKey) || (k == e.PAGEDOWN && e.ctrlKey)) ? 1 : d.pages;          this.field.dom.value = pageNum;          this.ds.load({params:{start: (pageNum - 1) * this.pageSize, limit: this.pageSize}});          e.stopEvent();        }        else if(k == e.UP || k == e.RIGHT || k == e.PAGEUP || k == e.DOWN || k == e.LEFT || k == e.PAGEDOWN)        {          var v = this.field.dom.value, pageNum;           var increment = (e.shiftKey) ? 10 : 1;          if(k == e.DOWN || k == e.LEFT || k == e.PAGEDOWN)            increment *= -1;          if(!v || isNaN(pageNum = parseInt(v, 10))) {            this.field.dom.value = d.activePage;            return;          }          else if(parseInt(v, 10) + increment >= 1 & parseInt(v, 10) + increment <= d.pages)          {            this.field.dom.value = parseInt(v, 10) + increment;            pageNum = Math.min(Math.max(1, pageNum + increment), d.pages) - 1;            this.ds.load({params:{start: pageNum * this.pageSize, limit: this.pageSize}});          }          e.stopEvent();        }    },    // private    beforeLoad : function(){        if(this.loading){            this.loading.disable();        }    },    // private    onClick : function(which){        var ds = this.ds;        switch(which){            case "first":                ds.load({params:{start: 0, limit: this.pageSize}});            break;            case "prev":                ds.load({params:{start: Math.max(0, this.cursor-this.pageSize), limit: this.pageSize}});            break;            case "next":                ds.load({params:{start: this.cursor+this.pageSize, limit: this.pageSize}});            break;            case "last":                var total = ds.getTotalCount();                var extra = total % this.pageSize;                var lastStart = extra ? (total - extra) : total-this.pageSize;                ds.load({params:{start: lastStart, limit: this.pageSize}});            break;            case "refresh":                ds.load({params:{start: this.cursor, limit: this.pageSize}});            break;        }    },    /**     * Unbinds the paging toolbar from the specified {@link Ext.data.Store}     * @param {Ext.data.Store} store The data store to unbind     */    unbind : function(ds){        ds.un("beforeload", this.beforeLoad, this);        ds.un("load", this.onLoad, this);        ds.un("loadexception", this.onLoadError, this);        this.ds = undefined;    },    /**     * Binds the paging toolbar to the specified {@link Ext.data.Store}     * @param {Ext.data.Store} store The data store to bind     */    bind : function(ds){        ds.on("beforeload", this.beforeLoad, this);        ds.on("load", this.onLoad, this);        ds.on("loadexception", this.onLoadError, this);        this.ds = ds;    }});