EasyUI ComboTree数据绑定树形分类显示

时间：2014-05-05 23:06:02 阅读：433 评论：0 收藏：0 [点我收藏+]

标签：style class tar ext color width

承接上篇博文【LINQ获取树形分类的层数】。在上文中，笔者只分享了层数，在这里我把完整的实现贴出来，欢迎批评指正。

先附上效果图：

首先是Tree公共类

public class Tree
{
public int ModuleID { get; set; }
public int ParentID { get; set; }
public int ModulePath { get; set; }
public string ModuleName { get; set; }
}

接下来就是TreeHelper了，这个类是获取json数据的核心。他将数据库中的数据组装成了EasyUI可以接受的json格式。

public class DepartmentTreeHelper
{
private static ZhaopinModels db = new ZhaopinModels();
#region 获取父类集合
public static IList<Tree> returnParentTree()
{
IList<Tree> trees = new List<Tree>();
List<TUserDepartment> departments = db.TUserDepartments.Where(d => d.department_pid == 0).ToList();
foreach (var userDepartment in departments)
{
Tree tree = new Tree();
tree.ModuleID = userDepartment.id;
tree.ParentID = (int) userDepartment.department_pid;
tree.ModulePath = GetLayerById(tree.ModuleID);
tree.ModuleName = userDepartment.department_name;
trees.Add(tree);
}
return trees;
}
#endregion
#region 获取分类的层数
/// <summary>
/// 获取分类的层数
/// </summary>
/// <param name="id">根据id获取树的层数</param>
/// <returns>树的层数</returns>
private static int GetLayerById(int id)
{
int layer = 1;
for (
int subId =
(int)
db.TUserDepartments.Where(d => d.id == id)
.Select(d => d.department_pid)
.ToList()
.FirstOrDefault();
subId != 0;)
{
subId =
(int)
db.TUserDepartments.Where(d => d.id == subId)
.Select(d => d.department_pid)
.ToList()
.FirstOrDefault();
layer++;
}
return layer;
}
#endregion
#region 判断分类是否有子类
/// <summary>
/// 判断分类是否有子类
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public static bool IsHaveChild(int id)
{
bool flag = false;
var did = db.TUserDepartments.Where(d => d.department_pid == id).Select(d => d.id).ToList();
if (did.Count > 0)
{
flag = true;
}
return flag;
}
#endregion
#region 根据id获取子类
/// <summary>
/// 根据id获取子类
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public static IList<Tree> GetChild(int id)
{
IList<Tree> t = new List<Tree>();
List<TUserDepartment> departments = db.TUserDepartments.Where(d => d.department_pid == id).ToList();
foreach (var d in departments)
{
Tree tParent = new Tree();
tParent.ModuleID = d.id;
tParent.ParentID = (int) d.department_pid;
tParent.ModulePath = DepartmentTreeHelper.GetLayerById(tParent.ModuleID);
tParent.ModuleName = d.department_name;
t.Add(tParent);
}
return t;
}
#endregion
#region 获取json
/// <summary>
/// 获取json
/// </summary>
/// <returns></returns>
public static string GetJson()
{
string json = "[";
IList<Tree> t = DepartmentTreeHelper.returnParentTree();
foreach (Tree model in t)
{
if (model != t[t.Count - 1])
{
json += DepartmentTreeHelper.GetJsonByModel(model) + ",";
}
else
{
json += DepartmentTreeHelper.GetJsonByModel(model);
}
}
json += "]";
json = json.Replace("‘", "\"");
return json;
}
#endregion
#region 根据模型生成json
/// <summary>
/// 根据模型生成json
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static string GetJsonByModel(Tree t)
{
string json = "";
bool flag = DepartmentTreeHelper.IsHaveChild(t.ModuleID);
json = "{"
+ "‘id‘:‘" + t.ModuleID + "‘,"
+ "‘text‘:‘" + t.ModuleName + "‘,"
+ "‘iconCls‘:‘ok‘,"
+ "‘children‘:";
if (!flag)
{
json += "null}";
}
else
{
json += "[";
IList<Tree> list = DepartmentTreeHelper.GetChild(t.ModuleID);
foreach (Tree tree in list)
{
if (tree != list[list.Count - 1])
{
json += GetJsonByModel(tree) + ",";
}
else
{
json += GetJsonByModel(tree);
}
}
json += "]}";
}
return json;
}
#endregion
}

EasyUI ComboTree数据绑定树形分类显示,布布扣,bubuko.com

EasyUI ComboTree数据绑定树形分类显示

标签：style class tar ext color width

原文地址：http://www.cnblogs.com/tangyouwei/p/3704737.html

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