javascript - How can I send files along with other field's data to webmethod is asp.net using jquery ajax call? -


i have webform has x number of textboxes , y number of dropdowns etc using code send data webmethod @ server:

$.ajax({     type: "post",     url: "suppliermaster.aspx/registersupplier",     data: json.stringify({         id: $('#txtbidderid').val(),         bidamt: $('#txtbidamt').val()     }),     contenttype: "application/json; charset=utf-8",     datatype: "json",     async: true,     success: function (data, status) {         alert(data.d);     },     failure: function (data) {         alert(data.d);     },     error: function (data) {         alert(data.d);     } });

now problem want include file attachments on form. how add files data: of $.ajax method? not want use external plugins etc unless absolutely necessary.

lets modify data object :

var datatosend = {}; datatosend.id = $('#txtbidderid').val() datatosend.bidamt = $('#txtbidamt').val() datatosend.append( 'file', input.files[0] );

what webmethod armument like? example lets suppose looks of now: [webmethod] public static string submitbid(string id, string bidamt.....)

you can try this. may need manipulate content type. 

var datatosend = new formdata();     datatosend.append( 'file', input.files[0] );  $.ajax({   url: "suppliermaster.aspx/registersupplier",   data: datatosend,   processdata: false,   contenttype: false,   type: 'post',   success: function(data){     alert(data);   } });

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