Questions tagged [eventvalidation]
43 questions
2
votes
3 answers
How to pass Event Validation when editing a select list from JavaScript
I have two select lists in my ASP.NET site that are filled by the server with some elements.
// .aspx
F.P
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2
votes
2 answers
Access __VIEWSTATE & __EVENTVALIDATION in C#
In ASP.NET, is it possible to get the values of __VIEWSTATE and __EVENTVALIDATION hidden fields into a variable in C# (server side) in, let's say, overriding the Render method?
I have tried:
protected override void Render(HtmlTextWriter writer)
{
…
Yuvi Dagar
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1
vote
1 answer
Event Validation - Is it truly necessary for Js Heavy applications
This thing is really show stopper, i've been thinking about event validation and is this really necessary. I am looking into ways to avoid event validation for building a webservice-javascript oriented page where dropdownlists are loaded based on…
Deeptechtons
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1
vote
1 answer
Error on Postback
I have a webpage that has a grid on it. When you click edit, a popup modal window opens. Inside the popup modal window, there is a grid and below it a dropdownlist and save button. When you click save, the selected value is inserted in the grid…
anonymous1110
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1
vote
0 answers
Postback using WebClient and EventValidation
There's a web page from one of our subsidiaries. The page has EventValidation turned on. I've tried grabbing it and passing it as a postback value, but that doesn't work (obviously). Any ideas (besides turning off EventValidation)? Does it have…
Jason N. Gaylord
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1
vote
1 answer
ClientScriptManager.RegisterForEventValidation with HiddenField
I am trying to use to use ClientScriptManager.RegisterForEventValidation to register a hidden field and value that I am adding with ClientScriptManager.RegisterHiddenField. I doing this during the Render event. I get no error, but ASP.NET 2.0 does…
Sigray
1
vote
1 answer
Python Requests get __VIEWSTATE and __EVENTVALIDATION after __doPostBack
I am making requests to a website created using Asp.Net. I am using a Python Requests session to get the __VIEWSTATE and __EVENTVALIDATION variables and add them back to the data payload.
response = s.get(url, headers=headers)
soup =…
Bijan
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0 answers
WebForms keeps showing Event validation error on post
When I try to submit information from client to server, I receive Invalid postback or callback argument. Event validation is enabled using
Harry Tipper
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1
vote
1 answer
Jmeter EVENTVALIDATION and VIEWSTATE values passed incorrectly
I need to login a webpage. Passing the parameters from navigation screen,to POST to login screen i used CSS/Jquery extractor. of the three values extracted, Viewstate generator value is passed correctly. But Eventvalidation and Viewstate has…
Vicky
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0 answers
Keep __EVENTVALIDATION server side
I'm trying to keep the pagesize of an ASP.NET webforms application as small as possible.
One of the steps was keeping the hidden field values for __VIEWSTATE and __EVENTVALIDATION server side.
Keeping __VIEWSTATE serverside was simple enough by…
William
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1
vote
1 answer
Invalid postback or callback argument - No server controls except a button (DNN Module)
My DNN module page only contains some divs and a LinkButton. The contents of the div are populated using jQuery AJAX. The button is used to post a file to the server that needs to be uploaded. I am getting the "Invalid postback or callback argument"…
Apeksha
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1 answer
I am getting this error when running my web page developed in asp.net
Invalid postback or callback argument. Event validation is enabled using
user1639208
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1
vote
1 answer
Deserialize the EventValidation object
I am trying to serialize and deserialize the event validation store. I have used code on MSDN to do the same with the viewstate. I cannot seem to get the data out of the EventValidation object.
System.Web.UI.LosFormatter los = new…
PSSG
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0 answers
RegisterStartupScript in User Control causes Event Validation error
I have the following code in the code behind for a user control attached to a simple button click event. How do I avoid this cause an invalid postback? Its generating an Event Validation error.
protected void EditButton_Click(object sender,…
Steve Wash
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1
vote
2 answers
How to reset ASP.NET Form? aspnetForm.reset() causes Event Validation invalid postback error
I need to reset an ASP.NET form. I am trying to use document.aspnetForm.reset() but then whenever I try to do anything after that I get an event validation error. How can I reset my form without upsetting ASP.NET's Event Validation? I CANNOT turn…
Ryan
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