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AngularJS SQL

本章我们学习如何从数据库读取数据然后提供给 AngularJS 显示出来

使用 PHP 从 MySQL 中获取数据

<div ng-app="myApp" ng-controller="customersCtrl">
    <table>
        <tr ng-repeat="x in names">
            <td>{{ x.Name }}</td>
            <td>{{ x.Country }}</td>
        </tr>
    </table>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("/static/tiy/html/angularjs/customer.json?lang=php")
    .then(function (result) {
        $scope.names = result.data.records;
    });
})
</script>

运行范例 »

ASP.NET 中执行 SQL 获取数据

<div ng-app="myApp" ng-controller="customersCtrl">
    <table>
        <tr ng-repeat="x in names">
            <td>{{ x.Name }}</td>
            <td>{{ x.Country }}</td>
        </tr>
    </table>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("/static/tiy/html/angularjs/customer.json?lang=aspx")
    .then(function (result) {
        $scope.names = result.data.records;
    });
})
</script>

运行范例 »

服务端代码

我们将主要讲解以下几种方式返回的 JSON

使用 PHP 和 MySQL。返回 JSON
使用 PHP 和 MS Access。返回 JSON
使用 ASP.NET, VB, 及 MS Access。返回 JSON
使用 ASP.NET, Razor, 及 SQL Lite。返回 JSON

跨域 HTTP 请求

如果想要从不同的域名上获取数据就需要使用跨域 HTTP 请求

跨域请求在网页上非常常见，很多网页从不同服务器上载入 CSS, 图片，JavaScript 脚本等

几乎所有的浏览器，为了数据的安全，所有请求被严格限制在同一域名下，如果需要调用不同站点的数据，需要通过跨域来解决

下面的 PHP 代码运行使用的网站进行跨域访问

<?php 
header("Access-Control-Allow-Origin: *");

1. PHP 和 MySql 代码范例

<?php

header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");

$conn = new mysqli("127.0.0.1", "root", "", "angularjs");
$result = $conn->query("SELECT CompanyName as Name, City, Country FROM Customers");

$rs = array();
while($row = $result->fetch_array(MYSQLI_ASSOC))
{
    $rs[] = $row;
}

$conn->close();

echo json_encode(array('records' => $rs));

2. PHP 和 MS Access 代码范例

<?php
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=ISO-8859-1");

$conn = new COM("ADODB.Connection");
$conn->open("PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb");
$cursor = $conn->execute("SELECT CompanyName AS Name, City, Country FROM Customers");

$rs = array();

while (!$cursor->EOF)
{
    $rs[] = $cursor;
    $cursor->MoveNext();
}

$conn->close();

echo json_encode(array('records' => $rs));

3. ASP.NET, VB 和 MS Access 代码范例

<%@ Import Namespace="System.IO"%>
<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.OleDb"%>
<%
Response.AppendHeader("Access-Control-Allow-Origin", "*")
Response.AppendHeader("Content-type", "application/json")
Dim conn As OleDbConnection
Dim objAdapter As OleDbDataAdapter
Dim objTable As DataTable
Dim objRow As DataRow
Dim objDataSet As New DataSet()
Dim outp
Dim c
conn = New OledbConnection("Provider=Microsoft.Jet.OLEDB.4.0;data source=Northwind.mdb")
objAdapter = New OledbDataAdapter("SELECT CompanyName, City, Country FROM Customers", conn)
objAdapter.Fill(objDataSet, "myTable")
objTable=objDataSet.Tables("myTable")

outp = ""
c = chr(34)
for each x in objTable.Rows
if outp <> "" then outp = outp & ","
outp = outp & "{" & c & "Name"    & c & ":" & c & x("CompanyName") & c & ","
outp = outp &       c & "City"    & c & ":" & c & x("City")        & c & "," 
outp = outp &       c & "Country" & c & ":" & c & x("Country")     & c & "}"
next

outp ="{" & c & "records" & c & ":[" & outp & "]}"
response.write(outp)
conn.close
%>

4. ASP.NET, VB Razor 和 SQL Lite 代码范例

@{
Response.AppendHeader("Access-Control-Allow-Origin", "*")
Response.AppendHeader("Content-type", "application/json")
var db = Database.Open("Northwind");
var query = db.Query("SELECT CompanyName, City, Country FROM Customers");
var outp =""
var c = chr(34)
}
@foreach(var row in query)
{
if outp <> "" then outp = outp + ","
outp = outp + "{" + c + "Name"    + c + ":" + c + @row.CompanyName + c + ","
outp = outp +       c + "City"    + c + ":" + c + @row.City        + c + ","
outp = outp +       c + "Country" + c + ":" + c + @row.Country     + c + "}"
}
outp ="{" + c + "records" + c + ":[" + outp + "]}"
@outp