一：基础Json数据格式(多层次)--（用children表示子节点的集合）
[{ "id":1, "name":"C", "size":"", "date":"02/19/2010", "children":[{ "id":2, "name":"Program Files", "size":"120 MB", "date":"03/20/2010", "children":[{ "id":21, "name":"Java", "size":"", "date":"01/13/2010", "state":"closed", "children":[{ "id":211, "name":"java.exe", "size":"142 KB", "date":"01/13/2010" },{ "id":212, "name":"jawt.dll", "size":"5 KB", "date":"01/13/2010" }] },{ "id":22, "name":"mysql", "size":"", "date":"01/13/2010", "state":"closed", "children":[{ "id":221, "name":"my.ini", "size":"10 KB", "date":"02/26/2009" },{ "id":222, "name":"my-huge.ini", "size":"5 KB", "date":"02/26/2009" },{ "id":223, "name":"my-large.ini", "size":"5 KB", "date":"02/26/2009" }] }] },{ "id":3, "name":"eclipse", "size":"", "date":"01/20/2010", "children":[{ "id":31, "name":"eclipse.exe", "size":"56 KB", "date":"05/19/2009" },{ "id":32, "name":"eclipse.ini", "size":"1 KB", "date":"04/20/2010" },{ "id":33, "name":"notice.html", "size":"7 KB", "date":"03/17/2005" }] }] }]
二：_parentId的数据格式 --（用_parentId表示指向上级节点id）
{"total":7,"rows":[
{"id":1,"name":"All Tasks","begin":"3/4/2010","end":"3/20/2010","progress":60,"iconCls":"icon-ok"},
{"id":2,"name":"Designing","begin":"3/4/2010","end":"3/10/2010","progress":100,"_parentId":1,"state":"closed"},
{"id":21,"name":"Database","persons":2,"begin":"3/4/2010","end":"3/6/2010","progress":100,"_parentId":2},
{"id":22,"name":"UML","persons":1,"begin":"3/7/2010","end":"3/8/2010","progress":100,"_parentId":2},
{"id":23,"name":"Export Document","persons":1,"begin":"3/9/2010","end":"3/10/2010","progress":100,"_parentId":2},
{"id":3,"name":"Coding","persons":2,"begin":"3/11/2010","end":"3/18/2010","progress":80},
{"id":4,"name":"Testing","persons":1,"begin":"3/19/2010","end":"3/20/2010","progress":20}
],"footer":[
{"name":"Total Persons:","persons":7,"iconCls":"icon-sum"}
]}
我的代码注意红色段：
public ActionResult GetSpaceList(int SpaceId) { var result = spaceBll.LoadEntities(u => u.ParentId == SpaceId).OrderBy(u=>u.ParentId).ToList(); var list = result.Select(b => new { id = b.SpaceId ==0?"0":b.SpaceId.ToString(), text = b.SpaceName, _parentId = b.ParentId == 0 ?"0":b.ParentId.ToString(), CityCode = b.CityCode, b.FirstChar, mm_SpaceTypeMas = b.mm_SpaceTypeMas, state = ((b.SpaceTypeId == 5 || b.SpaceTypeId == 6) ? "open" : "closed") }).ToList(); List<object> test = new List<object>(); test.Add(new { id ="0", text = "所有位置", state = "open" }); test.AddRange(list); return Json(new { total = result.Count(), rows = test });
三：带footer的_parentId数据格式（footer怎么用还没测试过）
{"total":9,"rows":[
{"id":1,"region":"Wyoming"},
{"id":11,"region":"Albin","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":1},
{"id":12,"region":"Canon","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":1},
{"id":13,"region":"Egbert","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":1},
{"id":2,"region":"Washington"},
{"id":21,"region":"Bellingham","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2},
{"id":22,"region":"Chehalis","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2},
{"id":23,"region":"Ellensburg","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2},
{"id":24,"region":"Monroe","f1":2000,"f2":1800,"f3":1903,"f4":2183,"f5":2133,"f6":1923,"f7":2018,"f8":1838,"_parentId":2}
],"footer":[
{"region":"Total","f1":14000,"f2":12600,"f3":13321,"f4":15281,"f5":14931,"f6":13461,"f7":14126,"f8":12866}
]}
在easyui加载数据时，必须遵循上述的几种数据规则，否则数据不能正确显示，字段名称可以根据自己的情况定义，但是格式必须保持一致，在treegrid的加载时，遇到级联的情况需要主要_parentId字段名称。
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