JQuery AJAX 语法

JQuery AJAX syntax

提问by Nick

I am trying to find the correct syntax to pass a varible to my JQuery Post.

我试图找到正确的语法来将变量传递给我的 JQuery 帖子。

var id = empid;

$.ajax({
    type: "POST",
    url: "../Webservices/EmployeeService.asmx/GetEmployeeOrders",
    data: "{empid: empid}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(result) {
        alert(result.d);
    }

I don't think the data: value is quite right. Someone set me straight?

我不认为 data: value 是正确的。有人让我直截了当？

Thanks!

谢谢！

回答by Jose Basilio

How about this:

这个怎么样：

var id = empid;

$.ajax({
    type: "POST",
    url: "../Webservices/EmployeeService.asmx/GetEmployeeOrders",
    data: "{empid: " + empid + "}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(result){
        alert(result.d);
        console.log(result);
    }
});

回答by Paolo Bergantino

datacan either be a URL encoded string or an object:

data可以是 URL 编码字符串或对象：

data: {empid: empid},

OR

或者

data: "empid=" + empid,

The docs say:

文档说：

Data to be sent to the server. It is converted to a query string, if not already a string. It's appended to the url for GET-requests. See processData option to prevent this automatic processing. Object must be Key/Value pairs. If value is an Array, jQuery serializes multiple values with same key i.e. {foo:["bar1", "bar2"]} becomes '&foo=bar1&foo=bar2'.

要发送到服务器的数据。如果不是字符串，则将其转换为查询字符串。它附加到 GET 请求的 url。请参阅 processData 选项以防止此自动处理。对象必须是键/值对。如果 value 是一个数组，jQuery 将序列化多个具有相同键的值，即 {foo:["bar1", "bar2"]} 变为 '&foo=bar1&foo=bar2'。

回答by Mangy 007

Complete ajax syntax

完整的ajax语法

var data="abc";
       $.ajax({
            type: "GET",
            url: "XYZ",
            data: {
                "data":data,
            },
            dataType: "json",

            //if received a response from the server
            success: function( datas, textStatus, jqXHR) {

            },

            //If there was no resonse from the server
            error: function(jqXHR, textStatus, errorThrown){

            },

            //capture the request before it was sent to server
            beforeSend: function(jqXHR, settings){

            },

            //this is called after the response or error functions are finished
            //so that we can take some action
            complete: function(jqXHR, textStatus){

            }

        }); 

回答by ólafur Waage

This should work for you.

这应该对你有用。

$.ajax({
    type: "POST",
    url: "../Webservices/EmployeeService.asmx/GetEmployeeOrders",
    data: {empid: empid},
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(result) {
        alert(result.d);
}

回答by bdl

It's not. You're passing a string, you should be passing an object literal,e.g.

它不是。您正在传递一个字符串，您应该传递一个对象文字，例如

data: {"empid" : empid}

See the difference? Assuming empidis a variable with some sort of value, that should work fine. Alternatively you can do this

看到不同？假设empid是一个具有某种值的变量，它应该可以正常工作。或者你可以这样做

data: "empid="+empid

http://docs.jquery.com/Ajax/jQuery.ajax#options

http://docs.jquery.com/Ajax/jQuery.ajax#options

回答by LCJ

Though not a direct answer to your question, following is the common function approach used in one of our projects for jquery calls

虽然不是您问题的直接答案，但以下是我们的一个项目中用于 jquery 调用的常用函数方法

$.proxy() Method

$.proxy() 方法

The Proxy method takes an existing function and returns a new one with a particular context.

Proxy 方法采用现有函数并返回具有特定上下文的新函数。

Syntaxes

语法

$(selector).proxy(function,context)
$(selector).proxy(context,name)  

CODE

代码

dpInvokeAsync: function (serviceRequest, input, requestType, successCallBack) {
        var url = BASE_URL + serviceRequest;
        $.ajax({
            type: requestType,
            url: url,
            async: true,
            data: input,
            dataType: 'json',
            success: $.proxy(successCallBack, this),
            error:  $.proxy(this.handleFailure, this)
        });
    }


   this.dpInvokeAsync('App/ShowParts', searchCriteria, 'Post',
                      function (result) { alert(result);}
                      );

REFERENCES

参考

1. $(this) inside of AJAX success not working
2. jQuery Cross-Domain AJAX Request methods

1. AJAX 成功中的 $(this) 不起作用
2. jQuery 跨域 AJAX 请求方法

回答by Chad Grant

if you want to send a JSON string to the server

如果你想向服务器发送一个 JSON 字符串

data: "{empid: " + empid + "}"

if you want to send querystring params (?empid=123)

如果你想发送查询字符串参数 (?empid=123)

data: {empid : empid}

回答by khushwant

you can use the following.

您可以使用以下内容。

var id = empid;

$.ajax({
    type: "POST",
    url: "../Webservices/EmployeeService.asmx/GetEmployeeOrders",
    data: "var1=val1&var2=val2&var3=val3&var4=val4&var5=val5",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (result) {
        alert(result.d);
    }

回答by Srikar Doddi

  $(document).ready(function() {
  $.ajax({
    type: "POST",
    url: "Webservices/EmployeeService.asmx/GetEmployeeOrders",
    data: "{'EmployeeId':'empid'}", **<-- see the single quotes**
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(msg) {
          alert(msg);
         }
  });
});