如图，同事让帮忙实现一个需求
从二级树节点开始，同时选中的只能有一个二级树节点，选中的二级树节点之下的子节点都可以被选中。否则不能被选中
直接上代码
需要注意的是，文中树状图传递的数据是打平的数据，设置代码是下图，而不是树状图!!
:tree-config="{transform: true, rowField: 'cguid', parentField: 'cparentid'}" 上述的这一点非常重要
下面的全乎的数据图
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><!-- import CSS --><!-- 引入样式 --><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/vxe-table@legacy/lib/style.css"><!-- 引入vue --><script src="https://cdn.jsdelivr.net/npm/vue@2"></script><!-- 引入组件 --><script src="https://cdn.jsdelivr.net/npm/xe-utils"></script><script src="https://cdn.jsdelivr.net/npm/vxe-table@3.6.9"></script><script src="data.js"></script>
</head><body><div id="app"><vxe-table ref="treeNode" resizable :tree-config="{transform: true, rowField: 'cguid', parentField: 'cparentid'}" :data="tableData":checkbox-config="{labelField: 'cguid', highlight: true,visibleMethod:()=>true,checkMethod:()=>true}"@checkbox-change="selectChangeEvent"><vxe-column type="checkbox" title="ID" width="280" tree-node></vxe-column><vxe-column field="cname" title="Name"></vxe-column></vxe-table></div>
</body>
1：删除
2:节点禁用
3:筛选
<script>new Vue({el: '#app',data: function () {return {tableData: [], chooseDataTree: null,//选中的树节点的内容data2tree: [],//将打平数据封装成树结构}},created() {this.tableData = dataList;//将数据改为树状结构children = getJsonTree(dataList, '000000');//遍历需要这种结构this.data2tree = {cguid: "000000",children,}},methods: {selectChangeEvent({ $table, indeterminates, row, records }) {console.log(arguments) //将当前选中的数据 被选中子节点到root的数据this.handleCheckChange([...records, ...indeterminates],row)},handleCheckChange(data,row) {//整理成树状图 let chooseTree = getJsonTree(data, '000000') //当前选中节点是不是在第一次选中的树节点中let bool = this.checkMethod({row,chooseTree,chooseList:data})console.log('bool:',bool)//不再就不让勾选，同时提示if(!bool){this.$refs.treeNode.setCheckboxRow(row,false)VXETable.modal.message('当前无法被选中')}}, checkMethod({ chooseList,row ,chooseTree}) {//有选中的数据if (chooseList.length > 0 ) { //已经存在选中的treeif(this.chooseDataTree){//已经选中的tree中是否存在当前选中的项let haveBool = hasChildNode(this.chooseDataTree, row.cguid);return haveBool}//获取选中的树表格 let chooseTreeData = chooseTree[0];//从树表格中获取第二级的节点（只有选中节点数据）let leve2Item = chooseTreeData.children[0];//从完整的树表中获取完整的指定节点数据let getThenTree = getLeafNode(this.data2tree, leve2Item.cguid); //将选中的二级节点保存起来 用于校验this.setChooseDataTree(getThenTree);//检查当前节点是不是在选中的二级节点之中 let haveBool = hasChildNode(getThenTree, row.cguid);console.log('getThenTree:',getThenTree.cname,getThenTree);console.log('row:',row.cname,row)return haveBool} else {console.log('选中的内容空空如也')//将选中内容置空this.setChooseDataTree(null);return true}},//设置选中后的数据内容setChooseDataTree(data){this.chooseDataTree = data}}})//讲打平的数据组将组为树状图function getJsonTree(data, cparentid) {var result = [], temp;for (var i = 0; i < data.length; i++) {if (data[i].cparentid == cparentid) {if (cparentid === "000000") data[i]['disabled'] = true;var obj = { "name": data[i].cname, "id": data[i].cguid };obj = Object.assign(obj, data[i]);temp = this.getJsonTree(data, data[i].cguid);if (temp.length > 0) {obj.children = temp;}result.push(obj);}}return result;}//指定的节点中是否包含相应的子节点function hasChildNode(root, cguid) {if (root == null) {return false;}if (root.cguid === cguid) {return true;}let found = false;if (root.children && root.children.length > 0) {root.children.forEach(child => {if (hasChildNode(child, cguid)) {found = true;}});}return found;}//从树的表格中获取指定字节点内容数据function getLeafNode(root, cguid) {if (root == null) {return null;}if (root.cguid == cguid) {return root;}let result = null;if (root.children && root.children.length > 0) {root.children.forEach(child => {const leafNode = getLeafNode(child, cguid);if (leafNode != null) {result = leafNode;}});}return result;}</script></html>json打平的数据结构是
const dataList = [{"cguid": "5422","ccode": "01","cname": "01 资产","cparentid": "000000","ileaf": "0"},{"cguid": "70","ccode": "1004","cname": "1004 汇总科目","cparentid": "5422","ileaf": "0"},{"cguid": "78","ccode": "100401","cname": "100401 汇总科目1","cparentid": "70","ileaf": "1"},{"cguid": "95","ccode": "100402","cname": "100402 汇总科目2","cparentid": "70","ileaf": "1"},{"cguid": "47","ccode": "100403","cname": "100403 汇总科目3","cparentid": "70","ileaf": "1"},{"cguid": "87","ccode": "100404","cname": "100404 汇总科目4","cparentid": "70","ileaf": "0"},{"cguid": "97","ccode": "10040401","cname": "10040401 汇总科目4-1","cparentid": "87","ileaf": "1"},{"cguid": "41","ccode": "90000201","cname": "90000201 B2c1","cparentid": "31","ileaf": "1"},{"cguid": "77","ccode": "90000202","cname": "90000202 B2c2","cparentid": "31","ileaf": "1"},{"cguid": "428","ccode": "1001","cname": "1001 库xxx","cparentid": "422","ileaf": "1"},{"cguid": "430","ccode": "1002","cname": "1002 银xxx","cparentid": "422","ileaf": "1"},]
