Question

我以前使用的是下面的代码。这样，在请求标头中添加了range（Say：range：items：0-49）并基于该数据获取数据。见下文：

    require(["dojo/_base/declare",
            "dgrid/Grid",
            "dojo/store/Memory",
            "dgrid/extensions/Pagination",
            "dgrid/extensions/ColumnResizer",
            "dgrid/extensions/ColumnHider",
            "dgrid/extensions/ColumnReorder",
            "dojox/data/QueryReadStore",
            "dgrid/extensions/DijitRegistry",
            "dojo/store/JsonRest",
            "dojo/store/util/QueryResults",
            "dgrid/editor",
            "dojo/store/Cache",
       ],
        function(declare, Grid, Memory, Pagination, ColumnResizer, ColumnHider, ColumnReorder, QueryReadStore, DijitRegistry, JsonRest, QueryResults, editor,Cache){
             var Store = new Cache( JsonRest({
             target: "/path/to/service",
             query: function(query, options) {
                    var results = this.inherited(arguments);
                    var total;
                    var deferred = results.then(function(result) {
                        total = result.numRows;             
                        return result.listOfItems;
                    });
                    var qr = new QueryResults(deferred);
                    qr.then(function(qr){
                        qr.total= total;
                    });

                    return qr;
                }
            }), new Memory() );


        var searchGrid = new  (declare([Grid, Pagination, Selection, ColumnReorder, ColumnResizer, ColumnHider, DijitRegistry]))({
                store: Store,             
                noDataMessage: "No data found",
                pageSizeOptions: [10, 15, 25], 
                rowsPerPage:10,
            }, "searchGrid");
            searchGrid.startup();

我已经将dgrid升级到0.4。，它使用dstore并且仅支持collection属性。所以我用dstore替换了dojo / store，并使用dstore / RequestMemory与 dgrid / OnDemandGrid”。

        var Store = new RequestMemory({
        target: "/path/to/service",
        });

        var searchGrid = new  (declare([Grid, Pagination, Selection, ColumnReorder, ColumnResizer, ColumnHider, DijitRegistry, selector, editor]))({
                collection: Store,
                noDataMessage: "No data found",
                pageSizeOptions: [10, 15, 25], 
                rowsPerPage:10,
            }, "searchGrid");
            searchGrid.startup();

dstore / RequestMemory实际上更多是一次请求。因此，当网格的记录少于1000条时，它便可以正常工作。但是对于超过2000条记录，获取记录需要花费大量时间。我想使用dstore添加相同的查询方法。我的意思是如何使用dgrid 0.4更新/替换此查询方法。请提出建议。谢谢！

有什么方法可以在dstore中使用查询方法吗？

0 个答案: