作者：秋名
撰写时间：2020 年05 月05日
需求：
1，树形选择，改为多选状态，查询表格
2，树形父节点要计算有几个楼层子节点，子节点里面对应宿舍，宿舍对应着床位。（X层-y间-z床 – 已入 a 人）
使用的是layui前端框架：https://www.layui.com/demo/laydate.html
树形zTree_v3使用文档： http://www.treejs.cn/v3/api.php
引用zTree_v3封装好的插件
<link href="~/A_Resources/R_PC/zTree_v3/css/zTreeStyle/zTreeStyle.css" rel="stylesheet" />
<script src="~/A_Resources/R_PC/zTree_v3/js/jquery.ztree.core-3.5.js"></script>
<script src="~/A_Resources/R_PC/zTree_v3/js/jquery.ztree.excheck-3.5.js"></script>
html：
<div class="zTreeDemoBackground left">
<ul id="tree" class="ztree" style="width: 90%; height: 90%; margin:0 5%;background: #fff;border:none;"></ul>
</div>
JS
//树形控件
function TreeView() {
$.ajax({
type: "Get",
url: "Get_TreeView",
async: false,
success: function (data) {
//console.log(data)
var treeObj = $.fn.zTree.init($("#tree"), setting, data);
}
});
}
var setting = {
check: {
enable: true,//是否显示复选框
chkStyle: "checkbox",
// chkboxType: { "Y": "ps", "N": "ps" },//是否选择子节点时，选择父节点
chkboxType: { "Y": "", "N": "" },
isSimpleData: true, //数据是否采用简单 Array 格式，默认false
treeNodeKey: "id", //在isSimpleData格式下，当前节点id属性
treeNodeParentKey: "pId", //在isSimpleData格式下，当前节点的父节点id属性
showLine: true, //是否显示节点间的连线
checkable: true
},
data: {
simpleData: {
enable: true
}
},
callback: {
onCheck: zTreeOnClick
//可以是onCheck/也可以onclike
},
view: {
//是否支持同时选中多个节点
selectedMulti: false
}
};
function zTreeOnClick(event, treeId, treeNode) {
$("#Hide_ID").val(treeNode.id)
var treeObj = $.fn.zTree.getZTreeObj("tree");//获取树节点元素
nodes = treeObj.getCheckedNodes(true);//获取树节点选中元素
//console.log(treeObj, nodes);
id = "";
for (var i = 0; i < nodes.length; i++) {
id += nodes[i].id+",";
//因为要获取多个ID，要加上","分隔一下。不然就拼接在一起
}
console.log(id);
//宿舍表格查询
var ID_QinShi = id //接收树节点选中的值
layuiTable.reload("tab_QinShi", {
url: "Select_SuSheH", //请求后台
page: {
curr: 1,
},
where: {
ID_QinShi: ID_QinShi //通过ID筛选（前：是后台接收。后：是页面获取值）
}
});
}
后台：
//树形类字段
public class TreeVo
{
public int? ParentID { get; set; }
public int? SonID { get; set; }
public string NodeName { get; set; }
public int? SupplierParentID { get; set; }
public int? SupplierSonID { get; set; }
}
/// <summary>
///宿舍楼栋树形图
/// </summary>
/// <returns></returns>
public JsonResult Get_TreeView()
{
List<Dictionary<string, object>> jsonlist = new List<Dictionary<string, object>>();
List<TreeVo> treeList = new List<TreeVo>();
var listSuShe = (from TbTrees in myModel.HB宿管楼栋
select new
{
宿舍楼栋ID = TbTrees.宿舍楼栋ID,//父亲id
宿舍楼栋MC = TbTrees.宿舍楼栋MC.Trim(),////儿子id
宿舍楼层ID = TbTrees.宿舍楼层ID//节点名
}).ToList();
for (int i = 0; i < listSuShe.Count; i++)
{
TreeVo tree = new TreeVo();
tree.ParentID = listSuShe[i].宿舍楼栋ID;//父亲id
tree.SonID = listSuShe[i].宿舍楼层ID;//儿子id
if (listSuShe[i].宿舍楼层ID == 0)
{
int J = int.Parse(tree.ParentID.ToString());
int I = int.Parse(tree.SonID.ToString());
int Count = (from tbJurisdictionGroupUser in myModel.HB宿管楼栋
where tbJurisdictionGroupUser.宿舍楼层ID == J
select tbJurisdictionGroupUser).Count();
int Count2 = (from tbSuSe in myModel.HB宿管楼栋宿舍
where tbSuSe.宿舍楼栋ID == J
select tbSuSe).Count();
int Count3 = (from tbSuSe in myModel.HB宿管楼栋宿舍
join tbChuagwei in myModel.HB宿管宿舍床位 on tbSuSe.宿舍ID equals tbChuagwei.宿舍ID
join tbStu in myModel.G机构学生 on tbChuagwei.分配机构学生ID equals tbStu.机构学生ID
where tbSuSe.宿舍楼栋ID == J
select tbSuSe).Count();
tree.NodeName = listSuShe[i].宿舍楼栋MC.ToString().Trim() + "（" + Count +"层"+"-"+ Count2 + "间"+"-"+"已入住"+ Count3 + "人"+"）";//拼接节点名
}
else
{
tree.NodeName = listSuShe[i].宿舍楼栋MC.ToString().Trim();//节点名
}
treeList.Add(tree);
}
foreach (var model in treeList)
{
Dictionary<string, object> jsonobj = new Dictionary<string, object>();
jsonobj.Add("id", model.ParentID); //父亲id
jsonobj.Add("pId", model.SonID);//儿子id
jsonobj.Add("name", model.NodeName);//节点名称
//jsonobj.Add("icon", "");
jsonlist.Add(jsonobj);
}
return Json(jsonlist, JsonRequestBehavior.AllowGet);
}
///// <summary>
///// 宿舍号表格查询
///// </summary>
///// <returns></returns>
public ActionResult Select_SuSheH(LayuiTablePage layuiTablePage,string ID_QinShi)
{
// string[] ss= "".Split(',');//截取字符串
// var o='d3';
string[] strs = ID_QinShi.Split(',');//截取一下前端传过来的两个ID值
///集合里面的值不能重复
HashSet<int> vs = new HashSet<int>();//声明集合
foreach (var item in strs)//遍历前端传来的ID值。
{
try
{
//Dictionary<int,string>
int i = Convert.ToInt32(item);//接收的ID为String，必须要转换一下。
//Add 重复返回fasle，成功true
vs.Add(i);
// vs.Contains(i);判断是否为空/有值
}
catch (FormatException)//FormatException强制转换报的错
{
}
}
// 1 ,2 3
List<SuSheBMVo> listSuSe = (from tb宿舍 in myModel.HB宿管楼栋宿舍
join tb房型 in myModel.HB宿管床位类型与价格 on tb宿舍.房型床位类别ID equals tb房型.房型床位类别ID
//orderby tb宿舍.宿舍ID descending
select new SuSheBMVo
{
宿舍ID = tb宿舍.宿舍ID,
房型床位类别ID = tb宿舍.房型床位类别ID,
宿舍编码 = tb宿舍.宿舍编码,
性别= tb宿舍.性别,
房型床位类别MC = tb房型.房型床位类别MC,
床位数=tb宿舍.床位数,
入住人数=tb宿舍.入住人数,
宿舍楼层ID=tb宿舍.宿舍楼层ID
}).ToList();
//将前端传过来的值，带着对应ID的数据返回前端
listSuSe = listSuSe.Where((m) =>
{
return vs.Contains(m.宿舍楼层ID==null?0:Convert.ToInt32(m.宿舍楼层ID));
// ture 返回该条数据
//false 不返回数据
//return true;
}).ToList();
//计算总条数
int totalRow = listSuSe.Count();
//分页数据
List<SuSheBMVo> dbSuse = listSuSe
.Skip(layuiTablePage.GetStartIndex())
.Take(layuiTablePage.limit)
.ToList();
//实例化
LayuiTableData<SuSheBMVo> layuiTableData = new LayuiTableData<SuSheBMVo>();
layuiTableData.count = totalRow;
layuiTableData.data = dbSuse;
return Json(layuiTableData, JsonRequestBehavior.AllowGet);
}