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版本信息：dgrid 1.1.0
示例站点：http ://wab-preinspection-test.s3-website-us-west-2.amazonaws.com/

问题：
将行拖到网格外，然后放到网格内时，网格会被清除。

可能的原因：

拖放css类被分配了两次。

实验室的拖放示例显示了在 dgrid-scroller 级别分配一次的 dnd 类： 

<div class="dgrid-scroller dojoDndSource dojoDndTarget dojoDndContainer" style="user-select: none; margin-top: 25px; margin-bottom: 0px;">

而 dnd 类在我的代码中分配了两次：

<div id="grid" class="dgrid dgrid-grid ui-widget dojoDndTarget dojoDndContainer" role="grid">    
<div class="dgrid-scroller dojoDndSource dojoDndTarget dojoDndContainer" style="user-select: none; margin-top: 34px; margin-bottom: 0px;">

代码

网格属性：

        function createGrid(){
            dGrid = declare([Grid,DnD,Selection,ColumnResizer])

            //basic grid properties
            grid = new dGrid({
                bufferRows: 2000,
                farOffRemoval: 600000,
                keepScrollPosition: true,
                minRowsPerPage: 2000,
                maxRowsPerPage: 5000
            },'grid'); 
        }

源属性：

        //create target for Drag and Drop events            
        function createTarget(){

            target = new DnDSource('grid', {
                accept: ['dgrid-row'],
                delay: 2,
                isSource: false
                }
            });
        }

掉落事件：

         //listen for drop
        DnDevent = dojo.connect(target,"onDndDrop", function(){

            //update grid with new order
            newId = 1
            array.forEach(grid.collection.data, function(item){

                changedSequence[item.OBJECTID] = {"Order":newId}

                item.NewSequence = newId

                newId += 1
            })

            //reload the grid to show changes
            setTimeout( function(){ grid.refresh({ keepScrollPosition: true })} ,500)
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