小编Laa*_*ema的帖子

我正在尝试使用来自sql server数据库的node.js创建Web服务,在前端,当我同时调用这两个webservices时,它会抛出错误全局连接已经存在.首先调用sql.close().

任何方案？

var express = require('express');
var router = express.Router();
var sql = require("mssql");

router.get('/Plant/:server/:user/:password/:database', function(req, res, next) {

    user = req.params.user;
    password = req.params.password;
    server = req.params.server;
    database = req.params.database;


    // config for your database
    var config = {
        user: user,
        password: password,
        server: server,
        database:database

    };

    sql.connect(config, function (err) {



        // create Request object
        var request = new sql.Request();

        // query to the database and get the records
        request.query("SELECT  distinct PlantName FROM MachineryStateTable"
            , function (err, recordset) …

我正在尝试构建一个角度2应用程序,我的问题是我想为输入提供一个默认值并使其禁用我试过这个但它不起作用.

<div class="form-group">
    <label for="input01">UUID</label>
    <input class="form-control form-control-rounded" id="input01" style="width:600px;margin-left:60px" type="text" [(ngModel)]="beacon.uuid" value="{{uuid}}" name="uuid" disabled>
  </div>

有解决方案吗

我正在尝试构建一个角度2应用程序,当我点击我的地图时添加一个标记.这是我的代码:

<sebm-google-map (mapClick)="getPosition($event)" [latitude]="lat" [longitude]="lng" [zoom]="zoom" [backgroundColor]="backgroundColor" style="margin-bottom:900px">
  <sebm-google-map-marker *ngFor=" let post of posts" [latitude]="post.lapti" [longitude]="post.longi" ></sebm-google-map-marker>
</sebm-google-map>

有解决方案吗