Azure移动服务:JavaScript中的基本读取功能 [英] Azure mobile services: basic read function in javascript

问题描述

我正在学习javascript和windowsazure移动服务.在学习课程中，我创建了一个用户"表并插入了一个测试用户.我实际上是使用icenium为ipad和Andoid平板电脑编写一个演示应用程序，但即使是最基本的请求，我似乎也无法弄清楚.因此，我在这里设置了jsfiddle: http://jsfiddle.net/MNubd/5/.

I'm learning javascript and windowsazure mobile services. As a learning lesson I created a "users" table and inserted a test user. I'm actually using icenium to write a demo app for the ipad and andoid tablets, but I can't seem to figure out even the most basic request. So I've setup a jsfiddle here: http://jsfiddle.net/MNubd/5/.

这是一个简单的输入框:

It is a simple input box:

<input id="uFullName" type="text" />

和一些javascript代码.我正在尝试从用户"表中检索名称"列，并将其显示在输入框中:

and some javascript code. I'm trying to retrieve the "name" column from the table "users" and display it in the input box:

alert('running');
var client = new WindowsAzure.MobileServiceClient('https://mtdemo.azure-mobile.net/', 'MtxOqGpaBzuPRtnkIifqCKjVDocRPY47');
usersTable = client.getTable('users');
usersTable.where({ userID: '[e-mail]' }).read({
    success: function (results) {
        $('#uFullName').val(results);
    },
    error: function (err) {
        $('#uFullName').val('there was and err');
    }
});

感谢您的帮助！

我不知道成功功能只能在服务器脚本上使用.谢谢.这是最终对我有用的代码:

I had no idea the success function could only be used on server scripts. Thanks. Here is the code that ended up working for me:

function signInButton(e) {
    var un = $('#username');
    uName = un.val();
    var client = new WindowsAzure.MobileServiceClient('https://mtdemo.azure-mobile.net/', 'MtxOqGpaBzuPRtnkIifqCKjVDocRPY47');    
    //alert('lookup: ' + uName);
    usersTable = client.getTable('users');    
    usersTable.where({ userID: uName })
    .read()
    .done(
        function (results) {            
            try {
                xUserName = results[0].name; //using this to trigger an exception if the login credentials don't match.
                xUserID = results[0].id; // save this for querying and adding records for this user only.
                //alert('found');
                app.application.navigate('#view-menu');                        
            }
            catch(err) {
                 //alert('not found');
                 document.getElementById('errorText').textContent = "Check Email and Password!";                 
            }            
        } 
    );//end of the done

推荐答案

带有成功和 error 回调对象的options对象仅在服务器端脚本中使用.对于客户端，编程模型是基于Promise的，您应该使用 done()(或 then())延续来获得结果:

The options object with the success and error callback objects is only used in server-side scripts. For the client side, the programming model is based on promises, and you should use the done() (or then()) continuation to get the results:

var client = new WindowsAzure.MobileServiceClient('https://mtdemo.azure-mobile.net/', 'YOUR-KEY');
var usersTable = client.getTable('users');
usersTable.where({ userID: '[e-mail]' }).read().done(function (result) {
    $("#uFullName").val(result.name);
}, function (err) {
    $("#uFullName").val('There was an error: ' + JSON.stringify(err));
});

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