Question

Hi I need to generate some files on server side and return them to client with AJAX

I create next code on server (ASHX)

public void ProcessRequest(HttpContext context)
    {
        string dataViewID = context.Request.Form["dataViewID"];

        MyService service = new MyService();
        var data = service.GetStores(int.Parse(dataViewID), "", null);
        IMyExportService exportservice = new MyExportService();

        HttpContext.Current.Response.ContentType = "application/octet-stream";
        HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + "export.cvs");  

        using (var ms = new MemoryStream())
        {
            using (var sw = new StreamWriter(ms))
            {
                exportservice.ExportTo("csv", sw, data);                
                ms.Position = 0;                                                
                HttpContext.Current.Response.Write(ms.ToArray());
            }

        }
    }

on client i create next code:
$(“#btnexport”).click(function () {
var paramData = { “dataViewID”: 1524129, “filter”: “”, extent: null }; //full map
$.ajax({
url: ‘/marketVuePortal/’+’FileExport.ashx’,
type: ‘POST’,
dataType: “json”,
data: {dataViewID:1524129},
success: function (result) {
//what should be here ?
},
error: function (xhr) {
alert(“error”);
}
}
)}

);

But I have 2 problem I don’t know why but I always get error but in debug all code working well. and second is that I don’t know how to say browser that he need save page with out reload.

Answer 1

/* *
——————————————————————– * jQuery-Plugin – $.download – allows for simple get/post requests for files * by Scott Jehl, [e-mail] *
http://www.filamentgroup.com * reference article:
http://www.filamentgroup.com/lab/jquery_plugin_for_requesting_ajax_like_file_downloads/
* Copyright (c) 2008 Filament Group, Inc * Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL
(filamentgroup.com/examples/gpl-license.txt) licenses. *
——————————————————————– */ jQuery.download = function(url, data, method){ //url and data options required if( url && data ){ //data can be string of
parameters or array/object data = typeof data == ‘string’ ? data :
jQuery.param(data); //split params into form inputs var inputs =
”; jQuery.each(data.split(‘&’), function(){ var pair =
this.split(‘=’); inputs+=”; }); //send request jQuery(”+inputs+”)
.appendTo(‘body’).submit().remove(); }; };

This is solution that I have found.