AJAX--2017 Year January 15

Ajax:

General handler (Data Interface): ASHX

Passing Data across languages:
Xml:
The structure is not clear
Large code size
It's more trouble finding.
Non-object-oriented structure

Json:
Clear structure
Relatively small amount of code
Object-oriented processing parsing method, finding data is simple

Key-value pairs
{"Key1": "Value", "Key2": "Value"}

JSON for multiple objects
[{"Key1": "Value", "Key2": "Value"},{"Key1": "Value", "Key2": "Value"},{"Key1": "Value", "Key2": "Value"}]

After quoting jquery

$.ajax ({URL:"ajax/***.ashx", data: {"Key1":"value","Key2":"value"}, type:"Post", DataType:"JSON", Success:function (data) {}});

ASHX file

1         stringc = Context. request["Code"];2List<china> ulist =NewChinadata (). Select (c);3 4         stringJSON ="[";5 6 7         intCount =0;8         foreach(China uinchulist)9         {Ten             if(Count >0) One             { AJSON + =","; -             } -  theJSON + ="{\ "areacode\": \ ""+ U.areacode +"\ ", \" areaname\ ": \""+ U.areaname +"\"}"; -count++; -         } -  +JSON + ="]"; -  + context. Response.Write (JSON); AContext. Response.End ();

ashx File

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AJAX--2017 Year January 15