el-tree懒加载的实现以及局部刷新方式

el-tree懒加载局部刷新 el-tree局部刷新 2023-05-17 11:05:56 357人浏览八月长安

摘要

目录el-tree懒加载的实现及局部刷新整个树结构如下新增第一级节点的弹窗右侧悬浮显示操作按钮在第一级右侧点击按钮新增第二级节点的弹窗树节点新增编辑操作弹窗总结el-tree懒加载的

el-tree懒加载的实现及局部刷新

整个树结构如下

使用懒加载实现，第一个按钮可以折叠收缩，第二个按钮刷新，第三个按钮新增第一级节点

新增第一级节点的弹窗

右侧悬浮显示操作按钮

在第一级右侧点击按钮新增第二级节点的弹窗

html代码

<el-aside style="width: 15%;border-right: 1px solid rgb(238, 238, 238);">
	<div style="display:flex">
			<div style="width:86%">
				<el-input class="tree-search-input" clearable prefix-icon="el-icon-search" placeholder="输入关键字进行过滤" size="mini" v-model="filterText" @input="filterChange($event)"></el-input>
			</div>
			<div style="display:flex;align-items:center;">
				<i style="margin-right:5px;font-size: 18px;font-weight: bold;" :title="expandnode?'收起':'展开'" :class="{'el-icon-full-screen':!expandNode,'el-icon-crop':expandNode}" @click="nodeExpand"></i>
				<i title="刷新" class="el-icon-refresh" style="margin-right:5px;font-size: 18px;font-weight: bold;" @click="getQmsProductTree"></i>
				<i title="新增" class="el-icon-plus" style="font-size: 18px;font-weight: bold;" @click="showDialog({NAME:'第一级目录',ID:0},'add')"></i>
			</div>
		</div>
		<el-tree class="my-el-tree" :data="treeData" highlight-current :expand-on-click-node="true" ref="elTree" :props="defaultProps" @node-click="handleNodeClick" :default-expand-all="expandNode" :filter-node-method="filterNode" lazy :load="loadNode" node-key="ID">
			<span class="custom-tree-node" slot-scope="{ node, data }">
				<span class="show-ellipsis" style="width: 90%" :title="node.NAME">{{ data.NAME }}</span>
				<el-dropdown size="mini" @command="menuHandleCommand">
					<span class="el-dropdown-link">
						<i title="更多操作" class="el-icon-more"></i>
					</span>
					<el-dropdown-menu slot="dropdown">
						<el-dropdown-item icon="el-icon-plus" :command="{ node: node, data, action: 'add' }">添加</el-dropdown-item>
						<el-dropdown-item icon="el-icon-edit" :command="{ node: node, data, action: 'edit' }">编辑</el-dropdown-item>
						<el-dropdown-item divided icon="el-icon-delete" :command="{ node: node, data, action: 'delete' }">删除</el-dropdown-item>
					</el-dropdown-menu>
				</el-dropdown>
			</span>
		</el-tree>
	</el-aside>

树节点新增编辑操作弹窗

<el-dialog class="custom-class" :title="modularTitle" :visible.sync="showMenuDialog" v-if="showMenuDialog" width="40%">
	<el-fORM label-width="130px" size="mini" ref="menuRuleForm" :model="menuRuleForm" :rules="menuRules">
		<el-form-item v-if="menuState===0" label="父节点：">
			<el-input style="width: 90%" v-model="menuRuleForm.PARENT_NAME" disabled></el-input>
		</el-form-item>
		<el-form-item label="目录名称：" prop="NAME">
			<el-input style="width: 90%" v-model="menuRuleForm.NAME" placeholder="请输入目录名"></el-input>
		</el-form-item>
	</el-form>
	<div align="center">
		<el-button size="mini" type="primary" @click="saveMenu">保 存</el-button>
		<el-button size="mini" @click="closeMenuDialog">取 消</el-button>
	</div>
</el-dialog>

js代码，

refreshTreeNode方法如果是操作第一级节点就刷新整个树，如果操作的二级或三级节点则局部刷新，

let node_ = this.$refs.elTree.getNode(id)； node_.loaded = false; node_.expand();

通过id获取父节点，通过收缩展开父节点实现父节点的刷新

//  懒加载树
  loadNode:function(node, resolve) {
      if (node.level === 0) {
        return resolve([]);
      }
      axiOS({
          url:`/magic/api/qms/tree/getChildrenData`,
          method:'post',
          data: {
              TYPE: 'PRC',
              ID: node.data.ID
          }
      }).then(res=>{
          if(res && res.data && res.data.data) {
              resolve(res.data.data);
          }
      })
  },
  //树根节点加载
  getQmsProductTree:function(){
      axios({
          url:`/tree/getChildrenData`,
          method:'post',
          data: {
              TYPE: 'PRC'
          }
      }).then(res=>{
          if(res && res.data && res.data.data) {
              if(res.data.data.length>0){
                  this.treeData=res.data.data
                  this.dic_id = res.data.data[0].ID
              }
          }
      })
   },
  //树节点点击加载列表
  handleNodeClick:function(data, node, obj) {
      this.dic_id=data.ID
      this.initData(1);
  },  
  //树形控件收起与展开功能
  nodeExpand:function(){
      this.expandNode = !this.expandNode
      let elTree = this.$refs.elTree;
      for (var i = 0; i < elTree.store._getAllNodes().length; i++) {
          elTree.store._getAllNodes()[i].expanded = this.expandNode;
      }
  },
  //树过滤
  filterNode:function(value, data, node) {
      if (!value) return true;
      return data.NAME.indexOf(value) !== -1;
  },
  //类型树形控件查询功能
  filterChange:function (val) {
      this.$refs.elTree.filter(val);
  },
  // 刷新树节点
  refreshTreeNode:function(PARENT_ID) {
      let id = PARENT_ID?PARENT_ID:this.menuRuleForm.PARENT_ID
      if(id && id !== '0'){
          let node_ = this.$refs.elTree.getNode(id)
          node_.loaded = false;
          node_.expand();
      }else{
          this.getQmsProductTree();
      }
  },
 //初始化调用一次接口
   init: function() {
       this.getQmsProductTree();
       this.initData(1);
   }, 
   //树的按钮增删改事件
   menuHandleCommand:function(command){
       let data = command.data;
	let action = command.action;
	switch (action) {
		case 'add':
			this.showDialog(data, action);
			break;
		case 'edit':
			this.showDialog(data, action);
			break;
		case 'delete':
			this.delSysType(data);
			break;
	}
   },
   //点击按钮打开弹框添加菜单
showDialog:function(data, action) {
	this.showMenuDialog = true;
	if (data) {
		if (action == 'add') {
			this.modularTitle = '新增';
			this.menuRuleForm = {
                   NAME:'',
                   PARENT_ID: data.ID,
                   PARENT_NAME: data.NAME
               };
               this.menuState = 0;

		} else if (action == 'edit') {
			this.modularTitle = '编辑';
           	this.menuRuleForm = {
                   NAME: data.NAME,
                   ID: data.ID,
                   PARENT_ID:data.PARENT_ID
               };
               this.menuState = 1;
		}
	}
},
//保存菜单
   saveMenu:function(){
       this.$refs.menuRuleForm.validate((valid)=>{
           if(valid) {
               let param = {
                   NAME: this.menuRuleForm.NAME
               }
               if(this.menuState === 0) {
                   param.PARENT_ID = this.menuRuleForm.PARENT_ID
                   param.TYPE = 'PRC'
               }
               if(this.menuState === 1) {
                   param.ID = this.menuRuleForm.ID
               }
               axios({
                   url:'/tree/save',
                   method:'post',
                   data: param
               }).then(res=>{
                   if(res.data.state){
                       this.$message({type: 'success',message: res.data.message});
                       this.showMenuDialog = false;
                       this.refreshTreeNode()
                   }else{
                       this.$message({type: 'error',message: res.data.message});
                   }
               })   
           }
       })
   },
//删除树数据
delSysType:function(data) {
	this.$confirm('是否确定删除?', '提示', {
		confirmButtonText: '确定',
		cancelButtonText: '取消',
		type: 'warning',
	}).then(() => {
		axios({
               url:'/tree/delete',
               method:'post',
               data: data
           }).then(res=>{
               if(res.data.state){
                   this.$message({type: 'success',message: res.data.message});
                   this.showMenuDialog = false;
                   this.refreshTreeNode(data.PARENT_ID)
               }else{
                   this.$message({type: 'error',message: res.data.message});
               }
           })
	});
},
//关闭菜单添加编辑按钮
closeMenuDialog:function(){
    this.showMenuDialog=false;
},