/// <summary>
/// 區(qū)域
/// </summary>
public class Region
{
 /// <summary>
 /// 主鍵id
 /// </summary>
 public int Id { get; set; }
 /// <summary>
 /// 名稱
 /// </summary>
 public string Name { get; set; }
 /// <summary>
 /// 節(jié)點
 /// </summary>
 public string Node { get; set; }
 /// <summary>
 /// 父節(jié)點
 /// </summary>
 public string ParentNode { get; set; }
}

/// <summary>
/// Dto
/// </summary>
public class RegionsTreeOutput
{
 /// <summary>
 /// Id
 /// </summary>
 public int RegionsId { get; set; }
 /// <summary>
 /// tree顯示文本（對應(yīng)region的name）
 /// </summary>
 public string text { get; set; }
 /// <summary>
 /// tree的id（對應(yīng)Node）
 /// </summary>
 public string id { get; set; } 
 /// <summary>
 /// 子節(jié)點數(shù)據(jù)（此屬性就體現(xiàn)的數(shù)據(jù)的層級關(guān)系）
 /// </summary>
 public List<RegionsTreeOutput> children { get; set; }
}

 #region GetRegionTree 初始化數(shù)據(jù)獲取 的輔助方法
 public RegionsTreeOutput LoadRegions(string id, List<Region> inRegions, RegionsTreeOutput outRegions)
 {
 List<Region> regions = inRegions.Where(t => t.ParentNode == id).ToList();
 if (outRegions == null)//加載父節(jié)點
 {
 outRegions = ToTreeData(regions[0]);
 LoadRegions(outRegions.id, inRegions, outRegions);
 }
 else//加載子節(jié)點
 {
 outRegions.children = ToTreesData(regions);
 if (regions.Count > 0)
 {
 for (int i = 0; i < regions.Count; i++)
 {
 LoadRegions(regions[i].Node, inRegions, outRegions.children[i]);//遞歸調(diào)用
 }
 }
 }
 return outRegions;
 }
 public RegionsTreeOutput ToTreeData(Region region)
 {
 var treeData = new RegionsTreeOutput();
 treeData.id = region.Node;
 treeData.text = region.Name;
 treeData.RegionsId = region.Id; 
 return treeData;
 }
 public List<RegionsTreeOutput> ToTreesData(List<Region> listRegion)
 {
 var regions = new List<RegionsTreeOutput>();
 for (int i = 0; i < listRegion.Count; i++)
 {
 regions.Add(ToTreeData(listRegion[i]));
 }
 return regions;
 }
 #endregion

 /// <summary>
 /// 初始化數(shù)據(jù)獲取
 /// </summary>
 /// <returns></returns>
 public JsonResult GetResultData()
 {
 TreeDbContext db = new TreeDbContext();
 var regions = db.Regions.Where(t => true).ToList();
 var regionObj = LoadRegions("-1", regions, null);
 return Json(regionObj);
 }

 $(function () {
 $.post("/Home/GetResultData", null, function (sData) {
 treeObj = $('#jstree_demo').jstree({
 //, "checkbox"
 'plugins': ["contextmenu", "dnd", "search", "state", "types", "wholerow"],
 'core': {
 "animation": 0,
 "check_callback": true,
 'force_text': true,
 "themes": { "stripes": true },
 'data': sData
 },
 "types": {
 "default": {
 "icon": "fa fa-folder icon-state-warning icon-lg"
 },
 "file": {
 "icon": "fa fa-file icon-state-warning icon-lg"
 }
 },
 "contextmenu": {
 select_node: false,
 show_at_node: true,
 items: function (o, cb) {
 //因為這里我們之后需要定義多個項,所以通過對象的方式返回
 var actions = {};
 //添加一個"新增"右鍵菜單
 actions.create = {//這里的create其實闊以隨意命名,關(guān)鍵是里面的 這里面的 action回調(diào)方法
 "separator_before": false,//Create這一項在分割線之前
 "separator_after": true,//Create這一項在分割線之后
 "_disabled": false, //false表示 create 這一項可以使用; true表示不能使用
 "label": "新增", //Create這一項的名稱 可自定義
 "action": function (data) { //點擊Create這一項觸發(fā)該方法,這理還是蠻有用的
 var inst = $.jstree.reference(data.reference),
 obj = inst.get_node(data.reference);//獲得當(dāng)前節(jié)點,可以拿到當(dāng)前節(jié)點所有屬性
 //新加節(jié)點,以下三行代碼注釋掉就不會添加節(jié)點
 inst.create_node(obj, {}, "last", function (new_node) {
 setTimeout(function () { inst.edit(new_node); }, 0);//新加節(jié)點后觸發(fā) 重命名方法,即 創(chuàng)建節(jié)點完成后可以立即重命名節(jié)點
 });
 }
 };
 if (o.id != "0001")//屏蔽對根節(jié)點的操作 “0001”改成根節(jié)點對應(yīng)的真是id
 {
 //添加一個"重命名"右鍵菜單
 actions.rename = {
 "separator_before": false,
 "separator_after": false,
 "_disabled": false, //(this.check("rename_node", data.reference, this.get_parent(data.reference), "")),
 "label": "重命名",
 "action": function (data) {
 var inst = $.jstree.reference(data.reference),
 obj = inst.get_node(data.reference);
 inst.edit(obj);
 }
 }
 //添加一個"刪除"右鍵菜單
 actions.delete = {
 "separator_before": false,
 "icon": false,
 "separator_after": false,
 "_disabled": false, //(this.check("delete_node", data.reference, this.get_parent(data.reference), "")),
 "label": "刪除",
 "action": function (data) {
 var inst = $.jstree.reference(data.reference),
 obj = inst.get_node(data.reference);
 if (inst.is_selected(obj)) {
 inst.delete_node(inst.get_selected());
 }
 else {
 inst.delete_node(obj);
 }
 }
 };
 }
 return actions;//返回右鍵菜單項
 }
 },
 });
 });
 });

//刪除節(jié)點
$('#jstree_demo').on('delete_node.jstree', function (e, data) { 
 var id = data.node.original.RegionsId; 
 $.ajax({
 type: "get",
 url: "/Home/DeleteRegion?id=" + id,
 success: function (sData) {
 }
 }); 
 });
//移動節(jié)點
$('#jstree_demo').on('move_node.jstree', function (e, data) {
 saveRegions(data);
 });
//修改名
$('#jstree_demo').on('rename_node.jstree', function (e, data) { 
 saveRegions(data);
 });
//保存
function saveRegions(data) { 
 var id = data.node.original.RegionsId;
 var name = data.node.text;//修改后的name
 //var oldName = data.old;//原name 
 //var pNode = $('#jstree_demo').jstree().get_node(data.node.parent).original.RegionsId;
 var josnData = { "Id": id, "Node": data.node.id, "ParentNode": data.node.parent, "Name": name };
 $.ajax({
 url: "/Home/SaveRegions",
 data: josnData,
 success: function (sData) { 
 data.node.original.RegionsId = sData;
 data.node.state.opened = false;//是否展開
 }
 });
 }

function createTree() { 
 var ref = $('#jstree_demo').jstree(true),
 sel = ref.get_selected();
 if (!sel.length) { return false; }
 sel = sel[0];
 sel = ref.create_node(sel, { "type": "file" });
 if (sel) {
 ref.edit(sel);
 }
};
function renameTree() {
 var ref = $('#jstree_demo').jstree(true),
 sel = ref.get_selected();
 if (!sel.length) { return false; }
 sel = sel[0];
 ref.edit(sel, function () {
 
 });
};
function deleteTree() {
 var ref = $('#jstree_demo').jstree(true),
 sel = ref.get_selected();
 if (!sel.length) { return false; }
 ref.delete_node(sel);
};