AJAX large Data XML format submission

Ajax get and Post's two submission methods, get is mainly a small amount of data submission, here I talk about the process of sending a lot of data by post method.

Here I package all the content as an XML file stream, avoid the long parameter send, on the server side directly load XML parsing, very convenient, the data also did not lose phenomenon.

The following is the implementation of the process of thinking:

Step One: Create an XML DOM object that you can use to do the following

function Createdomdoc ()//Creating an XML Document Object

{

Var signatures = ["msxml2.domdocument.5.0", "msxml2.domdocument.4.0", "msxml2.domdocument.3.0", "Msxml2.DOMDocument" , "Microsoft.XMLDOM"];

for (Var i=0;i<signatures.length;i++)

{

Try

{

var domdoc = new ActiveXObject (signatures[i]);

return domdoc;

}

catch (E)

{

}

}

return null;

}

Step two: Get data from the client to be written to XM as follows:

function Createxml (DOC)

{

var root= doc.createelement ("root");

var title= doc.createelement ("title");

title.text= document.getElementById ("title"). Value;

Root.appendchild (title);

var homepage = doc.createelement ("homepage");

homepage.text= document.getElementById ("homepage"). Value;

Root.appendchild (homepage);

Doc.appendchild (root);

Alert ("ddddd");

return doc.xml;

}

The third step calls each other

var domdoc = Createdomdoc (); The creation object will be sent to the server side with send

if (domdoc!=null)

{

var xml = Createxml (Domdoc); Write XML return XML document

alert (domdoc);//

}

Else

{

Alert ("No MSXML controls are installed");

}

Fourth Step Ajax Send

var xmlhttp=createxmlhttp ();

Xmlhttp.onreadystatechange = function ()

{

if (xmlhttp.readystate = 4)

{

if (Xmlhttp.status = 200)

{

Info =xmlhttp.responsetext;

alert (info);

}

Else

{

Alert ("The AJAX call failed.") "+xmlhttp.status);

}

}

}

Xmlhttp.open ("POST", "Ajaxserver.aspx?type=add", false);

Xmlhttp.setrequestheader ("Content-type", "application/x-www-form-urlencoded;"); Critical, otherwise error

Xmlhttp.send (Domdoc); Send must be a Domdoc document object, if only send XML will make an error "statue=500"

Server-Side :

Set accept type to prevent garbled situation in Chinese

request.contentencoding = System.Text.Encoding.GetEncoding ("gb2312");

XmlDocument xmldoc = new XmlDocument (); Building an XML Document object

XmlDoc. Load (Request.inputstream); Accept AJAX-sent XML Document object stream//can also accept normal character streams

XmlNode node = xmldoc.  selectSingleNode ("//title"); Get title Node

title = node. InnerText; Get node value

partly explained:

Xmlhttp.open ("POST", "Ajaxserver.aspx?type=add", false);

The Open method contains at least three of the above parameters.

Post/get: Send Type

Ajaxserver.aspx?type=add: Request page Path

False: Can be true, when True is the request asynchronous, send can continue to use the form, false when sent lock the form, until the result returned.