AngularJS SQL

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2023-03-14

在前面章节中的代码也可以用于读取数据库中的数据。

使用 PHP 从 MySQL 中获取数据

AngularJS 实例

< 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) {
    $http.get("https://www.xnip.cn/try/angularjs/data/Customers_MySQL.php")
    .success(function (response) {$scope.names = response.records;});
});
< /script >

ASP.NET 中执行 SQL 获取数据

AngularJS 实例

< 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) {
    $http.get("https://www.xnip.cn/try/angularjs/data/Customers_SQL.aspx")
    .success(function (response) {$scope.names = response.records;});
});
< /script >

服务端代码

以下列出了几种服务端代码类型：

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

如果你需要从不同的服务器（不同域名）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，Js脚本等。

在现代浏览器中，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。

以下的 PHP 代码运行使用的网站进行跨域访问。

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

更多跨域访问解决方案可参阅：PHP Ajax 跨域问题最佳解决方案。

1. PHP 和 MySql 代码实例

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

$conn = new mysqli("myServer", "myUser", "myPassword", "Northwind");

$result = $conn->query("SELECT CompanyName, City, Country FROM Customers");

$outp = "";
while($rs = $result->fetch_array(MYSQLI_ASSOC)) {
    if ($outp != "") {$outp .= ",";}
    $outp .= '{"Name":"' . $rs["CompanyName"] . '",';
    $outp .= '"City":"'   . $rs["City"]        . '",';
    $outp .= '"Country":"'. $rs["Country"]     . '"}';
}
$outp ='{"records":['.$outp.']}';
$conn->close();

echo($outp);
?>

2. PHP 和 MS Access 代码实例

<?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");

$rs = $conn->execute("SELECT CompanyName, City, Country FROM Customers");

$outp = "";
while (!$rs->EOF) {
    if ($outp != "") {$outp .= ",";}
    $outp .= '{"Name":"' . $rs["CompanyName"] . '",';
    $outp .= '"City":"'   . $rs["City"]        . '",';
    $outp .= '"Country":"'. $rs["Country"]     . '"}';
    $rs->MoveNext();
}
$outp ='{"records":['.$outp.']}';

$conn->close();

echo ($outp);
?>

3. ASP.NET, VB 和 MS Access 代码实例

<%@ 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 代码实例

@{
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