ExtJs动态生成treepanel的Json格式

 

在节点中加上"checked"属性，会自动生成checkbox。

获取选中节点

var nodeArray = "";

var nodesObj = mytree.getChecked();

var i;var length=nodesObj .length;
for (i = 0; i < length; i++) {
nodeArray += nodesObj[i].id + ',';     //允许多选的情况。如果不允许多选，就直接nodesObj[i].id 
}

nodeArray = nodeArray.substring(0, nodeArray.length - 1);  

Json格式如下：

?

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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82

[     {         "text":"To Do",         "cls":"folder",         "expanded":true,         "children":[             {                 "text":"Go jogging",                 "leaf":true,                 "checked":true             },             {                 "text":"Take a nap",                 "leaf":true,                 "checked":false             },             {                 "text":"Climb Everest",                 "leaf":true,                 "checked":false             }         ]     },     {         "text":"Grocery List",         "cls":"folder",         "children":[             {                 "text":"Bananas",                 "leaf":true,                 "checked":false             },             {                 "text":"Milk",                 "leaf":true,                 "checked":false             },             {                 "text":"Cereal",                 "leaf":true,                 "checked":false             },             {                 "text":"Energy foods",                 "cls":"folder",                 "children":[                     {                         "text":"Coffee",                         "leaf":true,                         "checked":false                     },                     {                         "text":"Red Bull",                         "leaf":true,                         "checked":false                     }                 ]             }         ]     },     {         "text":"Remodel Project",         "cls":"folder",         "children":[             {                 "text":"Finish the budget",                 "leaf":true,                 "checked":false             },             {                 "text":"Call contractors",                 "leaf":true,                 "checked":false             },             {                 "text":"Choose design",                 "leaf":true,                 "checked":false             }         ]     } ]