I have an asp.net page with asp dropdown control, dropdown user control, componentArt callback control and submit button.
On selection of any item from asp.net dropdown control, it makes a server side call(like AJAX) and fill-in the dropdown user control.
Now user select item from the user control drop down and click the submit button to postback the form.
On clicking of submit button the below exception throws.
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%# Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.
If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Kindly tell the reason for getting this exception and provide the solution.
Related
My page uses Multiview with 3 views.
the third view for searching and has a datagrid in updatepanel, in datagrid has editcommand column. when user click edit on edicommand comlumn, the activeviewindex of multiview set to 1, but it throws and postback error.
"Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%# Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation."
I think my problem is activeviewindex method, because when user click edit on editcommandcolumn, I set activeviewindex to 1, while my datagrid is inside updatepanel and updatepanel in view 3. How can I fix it?
I think there are some options to consider:
If you don't care too much about security you can turn off event validation on that page.
Why are you using an update panel if when editing the grid you go to another view? Consider giving it up.
Try to put all three views within a single update panel.
I've got a .ascx server control in ASP.NET 2.0 that contains several other .ascx server controls. Everything in the top-level one is wrapped in an UpdatePanel. It works great until the second time I do something on the page, and then I get this error in an alert dialog:
Invalid postback or callback argument. Event validation is enabled using in configuration or <%# Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
This seems like a common error; a Google search turns up several results. They all seem to say that if a postback happens, you have to make sure to call Update on any UpdatePanels that contain controls that were updated. But when I'm debugging this my whole page is contained inside one UpdatePanel (whose UpdateMode is Always), so that doesn't seem right. What's going on?
I want to know if I apply server side validation on a text box then when the validation event fires (I means in which state of page cycle this validation has been done in server side)
It fires after the Load phase, before a button-click happens.
But in such a button-click handler, you need to check the results using Page.IsValid, to prevent handling the click when there is invalid input.
From this page:
Postback event handling: If the
request is a postback, control event
handlers are called. After that, the
Validate method of all validator
controls is called, which sets the
IsValid property of individual
validator controls and of the page.
I know why it's happening and i turned the validation off on the page level, but is there a way to turn it off on the control level?
"Invalid Postback or callback argument . Event validation is enabled
using in configuration or <%# Page EnableEventValidation="true" %>in a
page. For security purposes, this feature verifies that arguments to
Postback or callback events originate from the server control that
originally rendered them. If the data is valid and expected, use the
ClientScriptManager.RegisterForEventValidation method in order to
register the Postback or callback data for validation."
look this post.
Invalid postback or callback argument. Event validation is enabled using '<pages enableEventValidation="true"/>'
in this, i've used Subclass ListBox method. it works...
Using ASP.NET VB, I have a form with some text boxes and a Gridview. If a user clicks the Edit button on a row in the gridview, and then tries to submit the form with a row still in edit mode on the Gridview, this error is generated -
"Invalid postback or callback argument. Event validation is enabled using in configuration or <%# Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. "
Any idea how to prevent this error??
just go to web.config and make it false.
i also face that error and i fixed it by doing this.
check these link as reference
http://www.c-sharpcorner.com/Forums/ShowMessages.aspx?ThreadID=35528
http://channel9.msdn.com/forums/TechOff/155642-Invalid-postback-or-callback-argument-Wants-event-validation-enabled/
check my answer if you get your answer and vote it.thanx