Is there a difference, or are the terms synonymous? i could only find the difference between a full postback and a callback. I'm already aware of how a full postback is different.
View 1 Repliescan you define autopostback and postback and it's differences and which web server control support autopostback and postback and also the difference between postback and callback?
View 3 RepliesWhenever a postback would occur (AJAX'ed by an UpdatePanel) I want to do a callback beforehand and only after the callback has completed (either successfully or not) should the postback occur. How can I do this?
Elaborate explanation: We use ASP.NET AJAX (UpdatePanel 'n stuff) together with DevExpress controls. Among those controls is the ubiquitous GridView. As is typical with ASP.NET gridviews, you can edit rows one-by-one, and to save your changes you have to hit the "update" button at the end of the row. However if you make some changes to the row, then forget to press the "update" button, and hit something else in the page (say the big red SAVE button that causes a postback and saves the whole form to the DB), your changes will be lost. The row will still be in edit mode, but it will have reset to the data it had initially when you started the edit.
Our clients are not happy with this and want the row to be saved automatically if the user forgets to do so himself. Luckily the DevExpress gridview is smart enough to have an "Update()" method which I can call from JavaScript. Unluckily that causes a callback and returns immediately. If I allow the postback to continue as normally, the callback will get aborted. Well, technically it's a race condition I guess, but so far it seems that the postback wins. There are events to which I could attach for success/failure of the callback, but I don't know how to "resume" the postback that started it all. We could turn off callbacks for all the grids, but that would be a performance disaster.
I had web site I launched it on server and it worked well internal but when it being online this error appear in registration form<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.
View 1 RepliesI have updatePanel in my ASP.NET 2.0 (migrated from ASP.NET 1.1) web app. It doesn't work as it always postback instead of callback. I already set<xhtmlConformance mode="Transitional" /> but still not working. Previously, it just working.
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I'm having this wierd issue I hope you could help me with.I have two drop down lists in my page, and an accordion.When a value is chosen for the first DDl it loads specific values from my database into the second ddl.I've put the second one inside an Update panel, and added the first DDL as AsyncTrigger, so whenever someone chooses a value from the first DDL it loads the second one without refreshing the page.After a value has been chosen for the second DDl the accordion should be populated with data.I've ran some tests and noticed that choosing a value from the second DDL won't populate the accordion, so I've added another PostBack trigger to the second DDL- the ddl itself.Sometimes it works fine- I choose a value from ddl2 and the accordion shows fine, but sometimes I get this error message: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."Before putting the second ddl inside the update panel everything worked well so I'm a bit baffled here.
View 3 RepliesAlso RenderAction and Action. RenderXXX akaik write directly to response stream and XXX use additional string buffer. I don't really want doing benchmark my myself, so maybe someone already do it.
View 2 RepliesWhen i tried to edit a record present in a gridview I am getting the following error "Invalid postback or callback argument.Event validation is enabled using <pages Enable event validation="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 server control that originally render them.If data is valid and expected,use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation."
View 3 RepliesInvalid 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 have few dropsdowns and a button in a page. When i click on that button , i get above exception. What is the best way to fix this exception? I dont want to set enableEventValidation to false in config or at page directive.
View 8 RepliesI have a web page with various controls. Two of them are dropdownlists. The first dropdownlist gets populated from an xml file on the page_load event. This works fine. To the first dropdownlist a cascadingdropdownlist extender is attached which calls a webservice each time the selection in the first dropdownlist is changed. This works fine too. Underneath my two dropdownlists I have a button which posts the page back. However, when I have made a selection in the second dropdownlist and click the button I get the following error:
Server Error in '/' Application. 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.
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentException: 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.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
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I am new to ASP.NET MVC. I am using MVC 3 and my Issue is as below.Que 1I have created City Master using MVC where My first view is standard and Controller and Model are also standard nothing specific about it. Now when I want to create second view which will be of type partial view so It can be used with other views I am using same controller and model which I am using with first view. But when I try to instanciate the controller from PArtial view it shows non resolution of the controller. The same instanciation is working fine from my first view which is also using same controller.
View 5 RepliesI have a page that uses a master page. The following code only shows the bare minimum of the page:
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Code-behind:
[Code]....
The [Code]....
My guess is that it may releated to the ID's that are recreated.
I have a user control in the sidebar(in my web site) for display title and picture of any of news. his usercontrol in all of the pages is observable. when user click on the picture navigate to the page News.aspx for more details. first time i can but in second time when i click on another picture in the News.aspx i get an error like below:
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. but when i reload the page the problem is solved my code is:
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and my page directives is
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I have searched high and low on this error, but my problem stems back to which control is causing this problem. In theory the problem starts when someone goes to a specific tab and clicks a button to download a PDF file. After doing that if I use a dropdownlist the error pops up.I have checked the code etc. just cannot figure out which control is triggering the error. I can identify the control that is the problem?
View 14 RepliesI have a TabContainer, within a tab, i have a gridview, within the gridview i have a ImageButton. When I click on the ImageButton, I will call a javascript. The javascript will call a Hidden Button click. This hiddenbutton is the TargetControl of the Modalpopup so that when I click on the ImageButton, modalpopup is trigger. The Popup panal, Hidden Button and ModalPopupExtender below:
<asp:Panel ID="panEditAccessLog" runat="server" CssClass="gc_modalPopup" Style="display: none" BorderWidth="0px">
<table width="400px">
<tr>
<td width="150" height="20">
Employee ID:
[code]...
I have a a dropdown on a page
<asp:DropDownList ID="drpName" AutoPostBack="true" AppendDataBoundItems="true" runat="server" ></asp:DropDownList>
and I on occasion want to add items to it using javascript/jquery.
When I select the items that have been added and it does a postback I get the following error:
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.
I have a datalist which will display a list of groups from the database. In every group record, i have a button binding to it, and i give it a commandName call "joingroup" . When a user actaully clicks on the button(btnJoinGroup), the commandName fires. The problem i am facing now is, whenever i click on the button, i get this error below:
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.
aspx code
<asp:DataList ID="DataList1" runat="server" RepeatColumns="1" OnItemCommand="DataList1_ItemCommand">
<ItemTemplate>
<br /> [code]....
But I have another problem, my gridview is inside UpdatePanel and when I click on prev or next button I get exception: "Sys.WebForms.PageRequestManagerServerErrorException: 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."
Do you know what should I do to make it work?I don't think that I should change enableEventValidation to "false" maybe I should use ClientScriptManager.RegisterForEventValidation? But I don't know how to use it.
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.
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField HeaderText="Name" DataField="name" />
<asp:BoundField HeaderText="Member_id" DataField="unique_id" />
<asp:BoundField HeaderText="Batch" DataField="batch" />
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Typically I get this error when I am using AJAX, but I'm not using any AJAX at all in this page. Yet I'm getting this error.
Invalid postback or callback argument Here is my code.
[Code]....
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Is there a good way to test and debug these errors. I constantly get them emailed to me from my production site but I can not duplicate them. Below is the entire error.
User: jbrown
IP: 74.202.255.133
Session[STUser] = DAL.stUser
Session[PlaylistName] = Adult Contemporary Holiday Blend 2010 (vol. 2)
Session[PlaylistId] = 3865
Session[SES-FAN] = SessionFan
Session[fullPreview] = yes
System.ArgumentException: 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. at System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String
eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Exception of type 'System.Web.HttpUnhandledException' was thrown.
System.Web
at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean
includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.brandbrowse_aspx.ProcessRequest(HttpContext context) in c:WindowsMicrosoft.NETFramework64v2.0.50727Temporary
ASP.NET Files
oote6fbb3019956ec5aApp_Web_u-x9w715.8.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep
step, Boolean& completedSynchronously)
i use cascading dropdown lists (in a user registration form) and when the user hits the submit button i get the error: "Invalid postback or callback argument" I've seen on the net that this is a problem dating back many years but still haven't found a solution to this. I've read about changing EnableEventValidation to false, but this poses a security risk.
View 2 Replies<script type="text/javascript">
function configureDropDownLists(ddl_religion,ddl_caste) {
var Hindu = new Array('Ahom', 'Brahmin-other', 'Intercaste','Kalita','Kayastha','kshatriya','Manipuri','Maratha','Nepali','Rajbonshi','Rajput','SC','ST','Vishwakarma','Other');
var Muslim = new Array('Ansari', 'Arain', 'Awan','Bohra','Dekkani','Dudekula','Jat','Malik','Qureshi','Khoja','Memon','Mughal','Pathan','Mapila','Shafi','Sheikh','Syed','Siddiqui','Other');
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Everything is working fine and i am able to update the second dropdownlist based on the item selected in the first dropdownlist.
The problem is that i am not able to capture the data to a cs file and upload then it to database and i am getting this error:
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
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. "
I am getting the following error on on clikcing checkbox from checkbox list in my project.
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.
If i set <pages enableEventValidation="false"/> then on clicking the submit button the information is not saved in database just page is refreshed.
aspx.cs file code:
protected void btnSubmit_Click(object sender, EventArgs e) {
if (con.State == ConnectionState.Closed) {
con.Open();
}
SqlCommand cmd = new SqlCommand(@"insert into MainTable values(@CollegeName,@AffilatedWith,@CollegeType,@Country,@City,@State,@EstablishmentYear,
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