一 要引入的js css库
<link type="text/css" href="css/base.css" rel="stylesheet" />
<link type="text/css" href="jquery-easyui-1.4/themes/default/easyui.css" rel="stylesheet" />
<link type="text/css" href="jquery-easyui-1.4/themes/icon.css" rel="stylesheet" />
<link type="text/css" href="css/icon.css" rel="stylesheet" />
<script type="text/javascript" src="jquery-easyui-1.4/jquery.min.js"></script>
<script type="text/javascript" src="jquery-easyui-1.4/jquery.easyui.min.js"></script>
<script type="text/javascript" src="jquery-easyui-1.4/locale/easyui-lang-zh_CN.js"></script>
<script type="text/javascript" src="Scripts/json2.js"></script>
<%--<script type="text/javascript" src="jquery-easyui-1.4/extension/jquery-easyui-datagridview/datagrid-detailview.js"></script>--%>
<script type="text/javascript" src="Scripts/parseurl.js"></script>
二 写DIV用来存放菜单树，代码如下
<div region="center" border="false" data-options="title:'系统导航',collapsible:true"> tree的标题、位置，等属性
<div id="menuTree"></div> 通过js获取后台json数据，展现出来
</div>
三 写 js代码，与后台进行交互
$(function () { //在页面加载完毕后会执行该方法，个人理解$(function(){});好比就是java c#中的main()方法，是程序的入口
LoadMenuTree();
});
function LoadMenuTree() {
$('#orgTree').tree({
url: 'ashx/NewMenu.ashx?cmd=GetMENUTrees',//根据链接获取后台方法
onSelect: function (node) {//选中某个节点，会调用该事件
if (node.link != "")
getAspxFromMenuUrl(node.link)//根据传来的节点属性link进行页面的跳转
},
onLoadSuccess: function () {//成功加载树后会调用该事件
var rootNode = $("#orgTree").tree('getRoot');
$("#orgTree").tree("select", rootNode.target);
},
})
}
四 对后台代码的调用
1找到后台方法
NewMenu.ashx 页面内的内容
url: 'ashx/NewMenu.ashx?cmd=GetMENUTrees', 通过该链接既可找到 NewMenu类中的 GetMENUTrees方法
2 后台方法的实现
GetMENUTrees方法
#region 获取菜单树 public string GetMENUTrees(HttpContext context) { try { DataTable _menuOption = 从数据库中获取菜单的信息(下面将会介绍数据库的设计，以及如何从数据库中获取菜单数据) if (_menuOption.Rows.Count > 0) { List<EasyUITreeNode> list = GetTreeNode(_menuOption); //将菜单数据转换为带有递归关系的集合(即上下级关系) return ObjToJson(list); //将集合转换为json数据，最后返回前台 } else { return " "; } } catch (Exception e) { throw e; } }
两个bean类
public class EasyUITreeNode
{
public string pkid { set; get; }//主键
public string id { set; get; }//菜单ID
public string text { set; get; }//菜单名称
public string level { set; get; }
public string iconCls { set; get; }
public string state { set; get; }//节点是否展开
public string link { set; get; }//链接
public string iscontainer { set; get; }//是否为容器
public string visible { set; get; }//是否可见
public string parentid { set; get; }//上级
public string image { set; get; }
public bool Checked { set; get; }
public string haspermission { set; get; }
public List<EasyUITreeNode> children { set; get; }
}
public partial class SYS_MENUANDMEMBER
{
public int id { set; get; }
public int orderid { set; get; }
public string iconCls { set; get; }
public int levels { set; get; }
public string name { set; get; }
public string link { set; get; }
public int parent{ set; get; }
public string iscontainer { set; get; }//是否为容器
public string visible { set; get; }//是否可见
public string image { set; get; }
public string imgchange { set; get;}
public string javascript { set; get; }
}
将 DataTable _menuOption 转换为带有递归关系的List<EasyUITreeNode> 集合
//获取根节点
public List<EasyUITreeNode> GetTreeNode(DataTable _menuOtion)
{
DatatableToList<SYS_MENUANDMEMBER> list = new DatatableToList<SYS_MENUANDMEMBER>();
menuList = list.ConvertTolist(_menuOtion);//将 DataTable数据转换为list
List<SYS_MENUANDMEMBER> menulistNode = menuList.Where(m => m.parent == 0).ToList() 获取菜单的跟菜单，祖先菜单
List<EasyUITreeNode> treeList = new List<EasyUITreeNode>();
if (menulistNode.Count < 1)//为空，返回空值
{
return null;
}
else //不为空 则将 menulistNode 转换为 EasyUITreeNode
{
for (int i = 0; i < menulistNode.Count; i++)
{
EasyUITreeNode tree = new EasyUITreeNode();
tree.id = menulistNode[i].id.ToString();
tree.text = menulistNode[i].name;
tree.level = menulistNode[i].levels.ToString();
tree.link = menulistNode[i].link;
tree.parentid = menulistNode[i].parent.ToString();
tree.iscontainer = menulistNode[i].iscontainer;
tree.visible = menulistNode[i].visible;
//tree.iconCls = "panel-tool-collapse";
tree.iconCls = menulistNode[i].imgchange;
tree.state = "closed";
tree.children = GetTreeChildren(menulistNode[i].id);将根菜单的id作为其下级菜单的parentid,获取其下属的菜单
treeList.Add(tree);
}
return treeList;
}
}
//获取子节点
private List<EasyUITreeNode> GetTreeChildren(Int32 p) 方法原理同其上次菜单获取的原理相同
{
List<SYS_MENUANDMEMBER> menulistChildred = menuList.Where(m => m.parent.Equals(p)).ToList();
List<EasyUITreeNode> treeList = new List<EasyUITreeNode>();
if (menulistChildred.Count < 1)
{
return null;
}
else
{
for (int i = 0; i < menulistChildred.Count; i++)
{
EasyUITreeNode tree = new EasyUITreeNode();
tree.id = menulistChildred[i].id.ToString();
tree.text = menulistChildred[i].name;
tree.level = menulistChildred[i].levels.ToString();
tree.link = menulistChildred[i].link;
tree.parentid = menulistChildred[i].parent.ToString();
tree.iscontainer = menulistChildred[i].iscontainer;
tree.visible = menulistChildred[i].visible;
//tree.iconCls = menulistChildred[i].image;
tree.iconCls = menulistChildred[i].imgchange;
//tree.state = "closed";
tree.children = GetTreeChildren(menulistChildred[i].id);//一步步递归，最后将会得到一个具有层层递归关系的集合
treeList.Add(tree);
}
return treeList;
}
}
#region Datatable转List
public class DatatableToList<T> where T : new()
{
public List<T> ConvertTolist(DataTable dt)
{
List<T> ts = new List<T>();
Type type = typeof(T);
string tempName = "";
foreach (DataRow dr in dt.Rows)
{
T t = new T();
PropertyInfo[] propertys = t.GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
tempName = pi.Name;
if (dt.Columns.Contains(tempName))
{
if (!pi.CanWrite) continue;
object value = dr[tempName];
if (value != DBNull.Value)
pi.SetValue(t, value, null);
}
}
ts.Add(t);
}
return ts;
}
}
#endregion
//将返回值转换为json
public static string ObjToJson<T>(T data)
{
return JsonConvert.SerializeObject(data);
}
五 数据库部分 后续更新....