EasyUI ComboTree数据绑定树形分类显示

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

1. public class Tree


2. {


3. public int ModuleID { get; set; }
4. public int ParentID { get; set; }
5. public int ModulePath { get; set; }
6. public string ModuleName { get; set; }


7. }

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。

1. public class DepartmentTreeHelper


2. {


3. private static ZhaopinModels db = new ZhaopinModels();
4. #region
   获取父类集合
5. public static IList<Tree>
   returnParentTree()


6. {


7. IList<Tree> trees = new List<Tree>();


8. List<TUserDepartment> departments = db.TUserDepartments.Where(d =>
   d.department_pid == 0).ToList();
9. foreach (var
   userDepartment in departments)


10. {


11. Tree tree = new Tree();


12. tree.ModuleID = userDepartment.id;


13. tree.ParentID = (int)
    userDepartment.department_pid;


14. tree.ModulePath = GetLayerById(tree.ModuleID);


15. tree.ModuleName = userDepartment.department_name;


16. trees.Add(tree);


17. }


18. return trees;


19. }
20. #endregion
21. #region
    获取分类的层数
22. ///
    <summary>


23. ///
    获取分类的层数


24. ///
    </summary>


25. ///
    <param
    name="id">根据id获取树的层数</param>


26. ///
    <returns>树的层数</returns>


27. private static int GetLayerById(int id)


28. {


29. int layer = 1;


30. for (


31. int subId =


32. (int)


33. db.TUserDepartments.Where(d => d.id == id)


34. .Select(d => d.department_pid)


35. .ToList()


36. .FirstOrDefault();


37. subId != 0;)


38. {


39. subId =


40. (int)


41. db.TUserDepartments.Where(d => d.id == subId)


42. .Select(d => d.department_pid)


43. .ToList()


44. .FirstOrDefault();


45. layer++;


46. }


47. return layer;


48. }
49. #endregion
50. #region
    判断分类是否有子类
51. ///
    <summary>


52. ///
    判断分类是否有子类


53. ///
    </summary>


54. ///
    <param name="id"></param>


55. ///
    <returns></returns>


56. public static bool IsHaveChild(int id)


57. {


58. bool flag = false;


59. var did =
    db.TUserDepartments.Where(d => d.department_pid == id).Select(d =>
    d.id).ToList();


60. if (did.Count >
    0)


61. {


62. flag = true;


63. }


64. return flag;


65. }
66. #endregion
67. #region
    根据id获取子类
68. ///
    <summary>


69. ///
    根据id获取子类


70. ///
    </summary>


71. ///
    <param name="id"></param>


72. ///
    <returns></returns>


73. public static IList<Tree>
    GetChild(int id)


74. {


75. IList<Tree> t = new List<Tree>();


76. List<TUserDepartment> departments = db.TUserDepartments.Where(d =>
    d.department_pid == id).ToList();


77. foreach (var d in departments)


78. {


79. Tree tParent = new Tree();


80. tParent.ModuleID = d.id;


81. tParent.ParentID = (int)
    d.department_pid;


82. tParent.ModulePath =
    DepartmentTreeHelper.GetLayerById(tParent.ModuleID);


83. tParent.ModuleName = d.department_name;
84. t.Add(tParent);


85. }


86. return t;


87. }
88. #endregion
89. #region
    获取json
90. ///
    <summary>


91. ///
    获取json


92. ///
    </summary>


93. ///
    <returns></returns>


94. public static string GetJson()


95. {


96. string json = "[";


97. IList<Tree> t =
    DepartmentTreeHelper.returnParentTree();


98. foreach (Tree model in t)


99. {


100. if (model != t[t.Count -
     1])


101. {


102. json += DepartmentTreeHelper.GetJsonByModel(model) + ",";


103. }


104. else


105. {


106. json += DepartmentTreeHelper.GetJsonByModel(model);


107. }


108. }


109. json += "]";


110. json =
     json.Replace("‘", "\"");


111. return json;


112. }
113. #endregion
114. #region
     根据模型生成json
115. ///
     <summary>


116. ///
     根据模型生成json


117. ///
     </summary>


118. ///
     <param name="t"></param>


119. ///
     <returns></returns>


120. public static string GetJsonByModel(Tree
     t)


121. {


122. string json = "";


123. bool flag =
     DepartmentTreeHelper.IsHaveChild(t.ModuleID);
124. json
     = "{"


125. + "‘id‘:‘" + t.ModuleID
     + "‘,"


126. + "‘text‘:‘" + t.ModuleName
     + "‘,"


127. + "‘iconCls‘:‘ok‘,"


128. + "‘children‘:";


129. if (!flag)


130. {


131. json += "null}";


132. }


133. else


134. {


135. json += "[";


136. IList<Tree> list =
     DepartmentTreeHelper.GetChild(t.ModuleID);


137. foreach (Tree tree in list)


138. {


139. if (tree != list[list.Count -
     1])


140. {


141. json += GetJsonByModel(tree) + ",";


142. }


143. else


144. {


145. json += GetJsonByModel(tree);


146. }


147. }


148. json += "]}";


149. }


150. return json;


151. }
152. #endregion


153. }

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