从 javascript 调用 webservice 并等待响应

发布于 2024-12-17 14:00:41 字数 697 浏览 4 评论 0原文

我创建了一个 webservice 并想从 javascript 调用它，为此我在页面的脚本管理器中注册了 ServiceReference ，并使用命名空间调用 webservice 。

我的问题是我想等到收到网络服务的响应。

为此，我尝试使用 setInterval 但这不起作用。

还有其他方法可以实现这一目标吗？

更多详情如下：在 Javascript 中，如果您编写一个函数来调用 WebService，则必须向其传递一个方法签名，该方法签名将在 Webservice 发送响应后调用。

例如，

var IsResponseReceived;
function GetSomethingFromWebService()
{
  IsResponseReceived = 'No';
  Namespace.WebServiceClass.GetMeSomething(parameter1,SuccessResponseReceiver);
  alert(webServiceResponse);
}

function SuccessResponseReceiver(parameter1,parameter2)
{
  IsResponseReceived = 'Yes';
}

在上面的代码中，我的警报每次都给我“否”。我想在警报和网络服务调用之间写一些代码，让我等待得到响应。

我现在清楚了吗？

原文

I have created a webservice and want to call it from javascript , for this I have registered ServiceReference in my page's script manager, and called webservice using namespace.

My problem is that I want to wait until response from webservice received.

For this I was trying to using setInterval but that does not work.

Any other way to achieve this?

More Details are below:
In Javascript If you write a function to call WebService you have to pass it a method signature that will be called after webservice sends response.

e.g.

var IsResponseReceived;
function GetSomethingFromWebService()
{
  IsResponseReceived = 'No';
  Namespace.WebServiceClass.GetMeSomething(parameter1,SuccessResponseReceiver);
  alert(webServiceResponse);
}

function SuccessResponseReceiver(parameter1,parameter2)
{
  IsResponseReceived = 'Yes';
}

In the above code my alert gives me 'No' everytime. I want to write someline inbetween alert and webservice call that should let me wait until I get response.

Am I Clear now?

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凉风有信 2024-12-24 14:00:41

如果您考虑使用纯 JavaScript（现在很不寻常），请考虑这段代码

var strURL = "localhost/services/foobar.svc";
var xmlHttpReq = false;
var self = this;
// Mozilla/Safari
if (window.XMLHttpRequest) {
    self.xmlHttpReq = new XMLHttpRequest();
}
// IE
else if (window.ActiveXObject) {
    self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
}
self.xmlHttpReq.open('GET', strURL, true);
self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
self.xmlHttpReq.onreadystatechange = function() {
    if (self.xmlHttpReq.readyState == 4) {
        // do whatever you want to do when your service responded
        // you may get the response content using self.xmlHttpReq.responseText
    }
}
self.xmlHttpReq.send();

如果您考虑使用 jQuery （这个周围流行的 JavaScript 框架），很简单：

$.ajax({
  url: "localhost/services/foobar.svc",
  success: function(data){
    // this is fired on successful response
    // you will have response content in data parameter
  }
});

If you consider using pure JavaScript (pretty unusual these days), consider this code

var strURL = "localhost/services/foobar.svc";
var xmlHttpReq = false;
var self = this;
// Mozilla/Safari
if (window.XMLHttpRequest) {
    self.xmlHttpReq = new XMLHttpRequest();
}
// IE
else if (window.ActiveXObject) {
    self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
}
self.xmlHttpReq.open('GET', strURL, true);
self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
self.xmlHttpReq.onreadystatechange = function() {
    if (self.xmlHttpReq.readyState == 4) {
        // do whatever you want to do when your service responded
        // you may get the response content using self.xmlHttpReq.responseText
    }
}
self.xmlHttpReq.send();

If you consider using jQuery (this one of the popular JavaScript framework around), its easy:

$.ajax({
  url: "localhost/services/foobar.svc",
  success: function(data){
    // this is fired on successful response
    // you will have response content in data parameter
  }
});

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