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The problem of passing array parameters through ajax calling webservice in jQuery (graphic tutorial)

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Release： 2018-05-22 11:54:38

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This article will give you a detailed introduction to jQuery through ajax to call webservice to pass array parameters through examples. Friends who need it can refer to

The following examples will be used to explain it to you more intuitively and easier for everyone to understand.

In my project, I call webservice through jquery.ajax.

The client code is as follows:

$.ajax({
url: "test/xxx.asmx",
type: &#39;POST&#39;,
dataType: &#39;xml&#39;,
timeout: ,
data: { name: "zhangsan", tags: ["aa", "bb", "cc"] },
error: function(xml) {
alert(xml.responseText);
},
success: function(xml) {
alert("OK");
}
});

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The server code is as follows:

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

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Always throws an exception.

The problem arises here:

The following is the HTTP data:

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

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And the format it expects is As follows:

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

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Compare the bold font above, the post data except the problem. The correct one should be as follows:

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

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It seems that the problem lies in jquery.ajax. See the code (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&#39;t currently deserialize
// nested arrays properly, and attempting to do so may cause
// a server error. Possible fixes are to modify rack&#39;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);
}
}

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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