"asp." NET paging control fetches page N data javascript:__dopostback

Recently crawled data in a simulated HTTP request, but the server was developed by asp.

Pagination control Code

<tr> &LT;TD align=" left"> Total &nbsp210&nbsp Records &nbsp--&nbsp &nbsp2&nbsp page &nbsp--&nbsp Total &nbsp3& nbsp page </td><td align=" right"><a id="Oraclepager1_first" 
href="javascript:__dopostback (& #39;oraclepager1$first& #39;,& #39;& #39;)"> Home </a>&nbsp;<a id="Oraclepager1_prev"href="javascript:__dopostback (& #39;oraclepager1$prev& #39;,& #39;& #39;)"> Previous Page
</a>&nbsp;<a id="Oraclepager1_next"href="javascript:__dopostback (& #39;oraclepager1$next& #39;,& #39;& #39;)"> Next </a>&nbsp;<a id="Oraclepager1_last" 
href="javascript:__dopostback (& #39;oraclepager1$last& #39;,& #39;& #39;)"> Last </a><SelectName="oraclepager1$pagelist" 
Onchange="javascript:settimeout (& #39; __dopostback (\& #39;oraclepager1$pagelist\& #39;,\& #39;\& #39 ;) & #39;, 0)"Id="oraclepager1_pagelist"> <option value="0">1</option> <option selected="selected"Value="1">2</option> <option value="2">3</option> </Select></td> </tr>

Click on the next page is actually called JS method

Javascript:__dopostback (oraclepager1$next&#), a. ;)

Request PostData by grasping the packet stitching

Ticket_postdata ="__eventtarget=oraclepager1%24next&__eventargument="+ Getelementvaluebyid (ticket_html,"__eventargument") +"&__lastfocus=&__viewstate="+ Getelementvaluebyid (ticket_html,"__viewstate") +"&__viewstategenerator="+ Getelementvaluebyid (ticket_html,"__viewstategenerator") +"&__VIEWSTATEENCRYPTED=&"+ Getelementvaluebyid (ticket_html,"__viewstateencrypted") +"&txtmembercardno=16881270&txtmembername=&txtstartdata=2016-12-01&txtstarttime=00%3a00%3a00 &txtEndData=2016-12-29&txtEndTime=23%3A59%3A59&txtPNR=&txtOperatorName=&txtFlight=& txtairline=&txtguestname=&txtguestcardno=&txtorderid=&ddlorderstatus=&ddlordersource=& ddlactivecode=0&txtmobile=&txtticketno=&txtkxorderid=&ddlpaytype=2&ddlordertype=0& oraclepager1%24pagelist="+count; Ticket_html= Spider. POST (main_url +"ticket/ticket/ticketorderlist.aspx? topmenuid=3&leftmenuid=306", ticket_postdata, Main_url +"ticket/ticket/ticketorderlist.aspx? topmenuid=3&leftmenuid=306", Encoding.GetEncoding ("GB2312"));

Results The server returns

Invalid postback or callback Argument. Event validation isEnabledusing<pages enableeventvalidation="true"/>inchConfiguration or <%@ Page enableeventvalidation="true"%>inchA page.
For Security purposes, thisFeature verifies that arguments to postback or callback events originate fromThe server control that originally rendered Them. If the data isValid and expected,
Use the Clientscriptmanager.registerforeventvalidation methodinchOrder to register the postback or callback data forValidation.

daddy, I can't get the second page of data i Want.

Asp. NET paging control fetches page N data javascript:__dopostback