有时咱们已经获得充分的分层树形网格的数据,咱们还想让树形网格按层次延迟加载节点。首先,只加载顶层节点;而后点击节点的展开图标来加载它的子节点。本教程展现如何建立带有延迟加载特性的树形网格。html
jQuery EasyUI最新试用版下载请猛戳>>node

点击查看示例json
建立树网格
1app 2ui 3this 4url 5spa 6code 7htm 8 9 10 11 12 13 14 15 16 |
< table id = "test" title = "Folder Browser" class = "easyui-treegrid" style = "width:700px;height:300px" data-options=" url: 'data/treegrid_data.json', method: 'get', rownumbers: true, idField: 'id', treeField: 'name', loadFilter: myLoadFilter "> < thead > < tr > < th field = "name" width = "220" >Name</ th > < th field = "size" width = "100" align = "right" >Size</ th > < th field = "date" width = "150" >Modified Date</ th > </ tr > </ thead > </ table > |
为了放置加载子节点,咱们须要为每一个节点重命名'children'属性。 正以下面的代码所示,'children'属性重命名为'children1'。 当展开一个节点时,咱们调用'append'方法来加载它的子节点数据。
'loadFilter'代码
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 |
function myLoadFilter(data,parentId){ function setData(data){ var todo = []; for ( var i=0; i<data.length; i++){ todo.push(data[i]); } while (todo.length){ var node = todo.shift(); if (node.children && node.children.length){ node.state = 'closed' ; node.children1 = node.children; node.children = undefined; todo = todo.concat(node.children1); } } } setData(data); var tg = $( this ); var opts = tg.treegrid( 'options' ); opts.onBeforeExpand = function (row){ if (row.children1){ tg.treegrid( 'append' ,{ parent: row[opts.idField], data: row.children1 }); row.children1 = undefined; tg.treegrid( 'expand' , row[opts.idField]); } return row.children1 == undefined; }; return data; } |
下载EasyUI示例:easyui-treegrid-demo.zip
有兴趣的朋友能够点击查看更多有关jQuery EasyUI的教程>>