jQuery中通过ajax调用webservice传递数组参数的问题实例详解

下面通过实例给大家说明比较直观些，更方便大家了解。

本人的项目中通过jquery.ajax调用webservice.

客户端代码如下:

$.ajax({
url: "test/xxx.asmx",
type: 'POST',
dataType: 'xml',
timeout: ,
data: { name: "zhangsan", tags: ["aa", "bb", "cc"] },
error: function(xml) {
alert(xml.responseText);
},
success: function(xml) {
alert("OK");
}
}); 

服务端代码如下:

[WebMethod]
public XmlDocument xxx(string name, string [] tags )
{ 
return sth; 
}

总是抛出异常.

问题出现在这里:

下面是HTTP数据:

POST http://xxx.com/xxx.asmx/xxx HTTP/1.1
Host: center.cmis.htpc.com.cn
Connection: keep-alive
Content-Length: 55
Cache-Control: max-age=0
Origin: http://xxx.com
User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Accept: application/xml, text/xml, */*; q=0.01
Referer: http://xxx.com/xxx.aspx
Accept-Encoding: gzip,deflate,sdch
Accept-Language: zh-CN,zh;q=0.8
Accept-Charset: GBK,utf-8;q=0.7,*;q=0.3
name=zhangsan&tags%5B%5D=aa&tags%5B%5D=bb&tags%5B%5D=cc

而它期望的格式是如下的:

POST /xxx.asmx/xxx HTTP/1.1
Host: xxx.com
Content-Type: application/x-www-form-urlencoded
Content-Length: length
name=string&tags=string&tags=string

比较上面粗体,post的数据除了问题. 正确的应该如下:

name=zhangsan&tags=aa&tags=bb&tags=cc

看来问题出在jquery.ajax上面了.见代码(jquery.1.8.3.js)

function buildParams(prefix, obj, traditional, add) {
var name;
if (jQuery.isArray(obj)) { 
// Serialize array item.
jQuery.each(obj, function(i, v) {
if (traditional || rbracket.test(prefix)) { 
// Treat each array item as a scalar.
add(prefix, v);
} else {
// If array item is non-scalar (array or object), encode its
// numeric index to resolve deserialization ambiguity issues.
// Note that rack (as of ..) can't currently deserialize
// nested arrays properly, and attempting to do so may cause
// a server error. Possible fixes are to modify rack's
// deserialization algorithm or to provide an option or flag
// to force array serialization to be shallow.
//ytx 
buildParams(prefix, v, traditional, add);
//buildParams(prefix + "[" + (typeof v === "object" ? i : "") + "]", v, traditional, add);
}
});
} else if (!traditional && jQuery.type(obj) === "object") {
// Serialize object item.
for (name in obj) {
buildParams(prefix + "[" + name + "]", obj[name], traditional, add);
}
} else {
// Serialize scalar item.
add(prefix, obj);
}
}

结论:

出问题的代码在22行,我修改成21行那样就行了.

不过,我对js/jquery都是一知半解的,希望不要引起别的后遗症,呵呵.

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