VS 2005 Programatically Check If Validation Has Failed / How To Solve
Dec 9, 2010
I have a web form with about 20 fields all validated, rather than use the validation summary control.
I would like a one line alert at the foot of the form that says something along the lines of "errors were found check the fields highlighted with a *" rather than an explanation for each field that has failed validation.
Seem simple enough in theory but i cant work it out.
Is there a line of VB.net code i could use to determine if validation has failed on one or more of my validators and maybe show a label with the "errors were found please check the fields highlighted with a *" message?
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Similar Messages:
Jul 28, 2010
I have a web page that shows all contacts and its running fine.
When user does not activity for some time and after that user clicks the button to download records, its shows message:
Validation of viewstate MAC failed
I am not getting where this problem arise and what to do to solve.
One imp thing, after being inactive for some time when I log out and then log in then its works fine.
I assume it can be session timeout problem, but don't know how to deal with it.
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Jun 11, 2010
I am using tabstrip control. each tab page have set of controls and each have different validation group. I have a common button to insert / update the tab datas. Now when a user entered the information in the first tab and press insert button, i need to validate second page also.
So i explicitely called Page.validate() metyhod in the insert button to ensure all the validation passed or not. All working fine. But i need to focus the second tab when user finished first page and not finished ssecond page. How can i focus the tab. I mean any way to check which validation group fails?
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Jan 25, 2011
I have on my page.aspx CheckBox with IDs representing the month.
Code:
<asp:CheckBox ID="January" runat="server" Text="Janvier" />
<asp:CheckBox ID="Febuary" runat="server" Text="Fevrier" />
<asp:CheckBox ID="March" runat="server" Text="Mars" />
<asp:CheckBox ID="October" runat="server" Text="Octobre" />
<asp:CheckBox ID="November" runat="server" Text="Novembre" />
<asp:CheckBox ID="December" runat="server" Text="Decembre" />
The ChecBox will be selected according to the user needs: 1, 2, 3 or more... When the page is fired, I wanted to get in the code behind the box which are checked so I can build a query consequently. So in the code behin, i have this:
[Code]....
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Aug 24, 2010
How do I get the value of the errorMode property set in the <system.webServer><httpErrors> element in web.config?
I'm trying to implement some "self-diagnostics" in an ASP.NET web application. When the app starts, it runs through some of the settings in web.config and confirm they're set correctly. While this code works quite nicely when the errormode is set in the <system.web><customErrors> element,
var errSec = (CustomErrorsSection)HttpContext.Current.GetSection("system.web/customErrors");
Response.Write(errSec.Mode.ToString());
it won't work once the site is deployed on IIS7 and this setting is now found in system.webServer -> httpErrors.
This won't work:
var errSec = (CustomErrorsSection)HttpContext.Current.GetSection("system.webServer/httpErrors");
And casting to a CustomErrorsSection also seems like a bad idea, there must be a better type to use?
I found this article on IIS.NET, HTTP Errors , but I hope to do this without the dependency on the Microsoft.Web.Administration library.
Okay, based on the suggestion below, I tried this:
var errSec = (ConfigurationSection)HttpContext.Current.GetSection("system.webServer/httpErrors");
Response.Write(errSec.SectionInformation.GetRawXml().ToString());
But that doesn't work either, the errSec object is null. And on a side-note, if I load the <system.web><customErrors> section using the same approach, the GetRawXml() method call fails with a "This operation does not apply at runtime." exception message.
I know how to load the whole web.config as an xml file and query that to get to the element I need. But it just seems to me like there must be a more elegant approach. How to read web.config as xml:
var conf = XDocument.Load(System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath + "web.config");
var errMode = conf.Root.Element("system.webServer").Element("httpErrors").Attribute("errorMode").Value;
but that's just nasty! And if the errorMode setting is set in machine.config or similar, it won't work.
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Feb 9, 2011
I have an ASPX page within which I have javascript code. I want to check wheather a particular application is installed in a system or not from my JavaScript code? how to achieve this in javascript. I want to check if a particular version of flash player is installed in my system or not? (My java script is on server side & it should find if an application is installed in client machine or not)
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Feb 22, 2011
I have asp.net form having 4 check boxes. not check box list. these 4 check boxes having the ValidationGroup property with same name say "chkValied". I have added Custom Validator there. now want to check at least on check box should be check out of these.
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Jun 28, 2010
How to validate check box/ check box list in Model?
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Jan 19, 2011
I need to perform a validation to check whether a TextBox value is empty on Dropown list selected Index change using validation controls in asp.net
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Feb 12, 2010
I have developed reports using crystal report which work well in Win XP(Dev & Server) but when we started to deploy it in Windows 2003 server , we are getting the Result as "Load report failed ". Have any one experienced this one?
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Dec 22, 2010
I have an ASP.NET MVC 2 web site that runs okay on my local machine. The first page that comes up uses data from a SQL Server 2005 database that is on a separate machine.
When I deploy the website to an IIS 6.0 web server and try to open the website in a browser on the web server desktop I get the following:
Server Error in '/AutoDoc' Application.
Login failed for user ''. The user is not associated with a trusted SQL Server connection.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Login failed for user ''. The user is not associated with a trusted SQL Server connection.
Source Error:
Line 27: </div>
Line 28:
Line 29: <% Html.RenderAction("GenreMenu", "DocStore"); %>
Line 30:
Line 31: <div>
Source File: c:InetpubAutoDocAutoDocViewsSharedSite.Master Line:
29
Stack Trace: [SqlException (0x80131904): Login failed for user ''. The user is not associated with a trusted SQL Server connection.]
There are so many ways to approach this that IM a little lost in the forest. What is the best way to address giving the hosting web server access to the database server? Or should I say give the web site access to the specific database?
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Mar 4, 2010
I have a managed dll compiled in vc++ 2005 with .net 2.0 works fine in visual web 2005.I upgrade my VW to 2008 and add the same dll to a project but getting a compile error.VC++ 2005
public ref class Class1 {
public: Class1(){
b1 = gcnew array<System::Int16>(50000);};
[code]...
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Jan 19, 2011
i have these message in only one user of my web ASP.NET application.
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey & validation algorithm. AutoGenerate cannot be used in a cluster.
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Nov 9, 2010
After changing the Master Page in ASP.NET MVC 1.0 application, I keep getting this familiar error when I try a postback without filling in the mandatory form elements which are validated by the server:
"Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster."
The new page refers to a lot of jQuery code with lightboxes, superfish etc. Could that be a problem while doing a postback?
If I revert back to the original master, the error disappears and I'm able to validate form fields. Both masters are located in the same path.
After a little debugging, I've realized that a directive in the master page:
<% Html.RenderAction("menu", "nav"); %>
is creating the problem. The directive asks the "menu" action of the controller "nav" to inject a partial view Menu.ascx. If I delete this line from the new master page, everything works OK. My app's left bar navigation relies on this directive to work properly. Is there any way I can get around this?
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Apr 29, 2010
I am trying a MVC 2 application on my computer's IIS and when I go to a page that contains a form I get the following error:
-----------------------
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
------------------------------
What is strange is that on the begining the form is ok but after a while I started to get this error.And why at the start everything was ok and after a while I started to get this error?
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Nov 16, 2010
I'm getting the following error in my event log appears many times each hour, if somebody could shed some light it would be very nice... Also I am running server 2008 web server, this is NOT a webfarm.
- <Event xmlns="[URL]/win/2004/08/events/event">
- <System>
<Provider Name="ASP.NET 4.0.30319.0" />
<EventID Qualifiers="16384">1316</EventID>
<Level>4</Level>
<Task>3</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-11-15T19:58:53.000000000Z" />
<EventRecordID>269048</EventRecordID>
<Channel>Application</Channel>
<Computer>MYCOMPUTER</Computer>
<Security />
</System>
- <EventData>
<Data>4009</Data>
<Data>Viewstate verification failed. Reason: The viewstate supplied failed integrity check.</Data>
<Data>11/15/2010 2:58:53 PM</Data>
<Data>11/15/2010 7:58:53 PM</Data>
<Data>c90bc32f744a4478bb63271bd76884a4</Data>
<Data>20406</Data>
<Data>44</Data>
<Data>50203</Data>
<Data>/LM/W3SVC/6/ROOT-1-129342688389277791</Data> .........
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Jan 25, 2010
I know this is a very common problem and a quick search in google offers a lot of solutions. However I could only find one person that came across it in the same way I am and no-one answered their question.
The scenario which causes this is if the page has been left dormant for a period of time and then a button is pressed which runs some sort of command. This might be pressing the logout button or trying to submit a contact form after having walked away at some point and then returning and hitting Send.
I do not have posts or actions in my form, it looks like this: <form id="form1" runat="server">
I have also added the following line to my web.config: <pages enableEventValidation="false" iewStateEncryptionMode="Never">
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Sep 2, 2010
this avoids a MAC error
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
I add this to webconfig and it works
<pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode="Never" enableViewStateMac="false">
why does it work and what an earth is this error as it makes no sense to me. it is to do with sessions.
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Dec 29, 2010
I have a search page and it works most of the time but every now and then when I enter another word to search again, I kept getting this error in the Firefox's Error Console:
Error: Sys.WebForms.PageRequestManagerServerErrorException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. Source File: http://www.MyComp.com criptResource.axd?d=zNx0Fk9xi1ETKBw_Fc9MJ3a9Kp9CNPrHQDabGthwzSh32Wkw_OzriOYrMMZHyFSHnzqpp01wziW_tN0f9jEcZnJcMuTjBAcDB3ptDE0FILLyGwC956G8jI5pQ19F3beEYg0dkW9A9W-jBl1ZBsRms11V-vdOFaHdfpkaWww0H0tuL7am4AbVTa36mnOyWkDq0&t=2610f696 Line: 1508
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Jul 14, 2011
I don't know what is causing this. The weird thing is, eventually, it goes away (as in, i get to see the web application form), BUT my web app does not work properly. I have image buttons that are not showing the image that I set at imageButton.ImageUrl. It works fine when I run it on my local machine (IIS), but when I try it on one of those free hosting sites, it will go as far as showing the interface (which has the image buttons), but when I click, it suppose to be set with an image.
btw, the first aspx page contains a ListView control, then after clicking on a button in that page, it goes to another page that contains a bunch of imagebuttons and an ajax timer control. I get the " Validation of viewstate MAC failed" error AFTER clicking on the button (in the ListView page).
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May 7, 2015
i have a webapplication hosted on web server. when i open page example login page , if i login after 2-3 mins or open any page after some time i face error, mentioned below. Server Error in '/' Application.Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. URL...
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.URL...
Source Error:
The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, follow one of the below steps, then request the URL:
1. Add a "Debug=true" directive at the top of the file that generated the error. Example:
<%@ Page Language="C#" Debug="true" %>
or:
2) Add the following section to the configuration file of your application:
<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>
Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.
Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.
[ViewStateException: Invalid viewstate.
Client IP: 14.98.31.134
Port: 59961
Referer: http://www.arpfashions.com/admin/index.aspx
Path: /admin/index.aspx
[code]....
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May 7, 2010
Sutring the website that im building, I opened up a page and left it open for about 40 minutes.
Next, i was trying to change selection in a DDL and got this error messag : Validation of viewstate MAC failed.
I read a bit abou the problem, still can't figure out why it happens, but it was written that a good workaround is :
[code]...
and third : I've thought about another solution. If the problem occurred while waiting, perhaps force refresh after certain amount of minutes of user doing nothing with the page. I think that I can perform the refresh using response.redirect, but what about the "WAITING "CERTAIN AMOUNT IF MINUTES OF USER DOING NOTHING WITH THE PAGE" part?
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Feb 15, 2011
I have simply created two aspx pages for testing purpose, Page1.aspx and Page2.aspx.
Page1.aspx code is as follows:
[Code]....
And Page2.aspx simply have this code:
[Code]....
Now,when i run Page1.aspx and press the button i am getting this error. Can anyone tell me why this error is occuring ?
ERROR:
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.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.
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Apr 10, 2010
I have a website(connect to active directory and pull the required details) deployed on the production web server and it is working fine from last one year.
But from last two days users are getting the following error frequently and find the error details below:-
how i can proceed on this error so that i will apply the fix in the webserver.
Error Details:
[code]....
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Aug 19, 2010
have this error in server..
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
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.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
Source Error:
The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, follow one of the below steps, then request the URL:
1. Add a "Debug=true" directive at the top of the file that generated the error. Example:
<%@ Page Language="C#" Debug="true" %>
or:
2) Add the following section to the configuration file of your application:
<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>
Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.
Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.
View 7 Replies
