jQuery EasyUI：根据数据库内容生成适合于easyui-tree的JSON数据格式

 

1，jQuery EasyUI中easyui-tree特定的JSON数据格式

[
{"id":1,"text":"某公司","children":[
    {"id":2,"text":"生产部"},
    {"id":4,"text":"质检部","children":[
        {"id":3,"text":"销售部"},
        {"id":5,"text":"后勤部"},
        {"id":6,"text":"人事部"},
        {"id":7,"text":"财务部"},
        {"id":8,"text":"IT部"}]
    }]
}
]

2，从数据库中查询出来的数据保存在一个List中。

其中字段Parent_Department_ID表明该节点的父节点。

则在数据库中查询出来的数据保存在List中对应数据结构中树的双亲表示法。对该树进行遍历的同时生成相应的JSON代码。

3，根据上述思想进行的具体实现

 

public string GetDepartmentTree()

 {<br>            //查询数据库，数据保存在List中

     List<department> queryDepart=_departmentService.LoadEntities(u=>true).ToList<department>();

     string departmentTree=null;

//遍历整个树，寻找根节点

     foreach (department d in queryDepart)

     {

         if (d.Parent_Department_ID == -1)

         {

             departmentTree=""id":"+d.Department_ID+","text":""+d.Department_Name+"",";

             <br>　　　　　　　　　　　 //调用FindChild方法，开始遍历整个树，寻找当前节点的子节点。   

             string child = FindChild(d.Department_ID, queryDepart);

             if (child != null)

             {

                 departmentTree += child;

             }

 

             departmentTree = "[{" + departmentTree + "}]";

         }

     }

 

     return departmentTree;

 }

 

 private string FindChild(int id, List<department> queryDepart)

 {

     bool flag = false;

     string departmentChild =null;

     foreach (department d in queryDepart)

     {

         string anotherChild = null;

         if (d.Parent_Department_ID == id)//寻找到子节点

         {<br>　　　　　　　　　　　

             anotherChild = ""id":" + d.Department_ID + ","text":"" + d.Department_Name + "",";

             <br>　　　　　　　　　　　 string child = FindChild(d.Department_ID, queryDepart);

             if (child != null)

             {

               

                 anotherChild = anotherChild + child ;

             }

             if (anotherChild[anotherChild.Length - 1] == ',')

             {

                 anotherChild = anotherChild.Remove(anotherChild.Length - 1);

             }

             anotherChild = "{" + anotherChild + "}";

 

             departmentChild += anotherChild+",";

         }

         else

         {

             flag = false;

         }           

 

     }

     if (departmentChild != null)

     {

         departmentChild = departmentChild.Remove(departmentChild.Length - 1);

         departmentChild = ""children":[" + departmentChild + "]";

     }

 

     return departmentChild;

 

 }