我们可以将之前章节中的代码用来从数据库中读取数据。
通过PHP Server从MySQL数据库中获取数据
<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) { $http.get("http://customers_mysql.php") .success(function (response) {$scope.names = response.records;}); }); </script>
通过ASP.NET Server从MSSQL数据库中获取数据
<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) { $http.get("http://customers_sql.aspx") .success(function (response) {$scope.names = response.records;}); }); </script>
服务器代码示例
下面几小节列出了几种不同的服务器端代码，用来从数据库中获取数据。
1. 使用PHP和MySQL。返回JSON数据。
2. 使用PHP和MS Access。返回JSON数据。
3. 使用ASP.NET，VB和MS Access。返回JSON数据。
4. 使用ASP.NET，Razor和SQL Lite。返回JSON数据。
跨站HTTP请求
从不同的服务器请求数据被称为跨站HTTP请求（即cross-site HTTP requests）。
跨站HTTP请求在web开发中很普遍。许多页面常常需要从不同的服务器加载各种资源，如CSS，images和scripts等。
在现代浏览器中，出于安全考虑，通过脚本进行跨站HTTP请求被严格限制，只允许访问同一站点内的数据。
下面这行代码被用在PHP中，用来允许跨站HTTP请求。
header("Access-Control-Allow-Origin: *");
1. 使用PHP和MySQL
<?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. 使用PHP和MS Access
<?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. 使用ASP.NET，VB和MS Access
<%@ 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. 使用ASP.NET，Razor和SQL Lite
@{ 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
