Hello,

I am hosting an ASP.NET MVC 2 application on its own application pool.

Everything works fine if the application pool is running on Network Service with Full Control.

If I make the application pool to run on its application pool identity, even with full control, the web site runs ok but on every page with 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."

Any idea how to solve this problem?

Thank You,

Miguel

I have to design a dot net application which talks to Java and other language modules in both way then what things i should consider first and what different technologies i can use to design .net application.

I am trying to create new webapplication from central administration

But when I click next to create application it shows me error

Please help

Server Error in '/' Application.

---

Runtime Error

Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed.

Details: To enable the details of this specific error message to be viewable on the local server machine, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "RemoteOnly". To enable the details to be viewable on remote machines, please set "mode" to "Off".

<!-- Web.Config Configuration File -->

<configuration>
  <system.web>
    <customErrors mode="RemoteOnly"/>
  </system.web>
</configuration>

I wanna host an external application,for example "Notepad.exe" in WPF?I use HwndHost to do so:

 

    class NetTermHost : HwndHost
    {
        private IntPtr hwndHost;

        protected override HandleRef BuildWindowCore(HandleRef hwndParent)
        {
            Process notePadProc = new Process();
            notePadProc.StartInfo.FileName = @"notepad.exe";
            notePadProc.Start();

            Thread.Sleep(1000);

            hwndHost = Win32Native.FindWindow("NotePad", null);

            uint oldStyle = Win32Native.GetWindowLong(hwndHost, Win32Native.GWL_STYLE);
            Win32Native.SetWindowLong(hwndHost, Win32Native.GWL_STYLE, oldStyle | Win32Native.WS_CHILD);

 

            Win32Native.SetParent(hwndHost, hwndParent.Handle);

 

            return new HandleRef(this, hwndHost);
        }

 

        protected override void DestroyWindowCore(HandleRef hwnd)
        {
            Win32Native.DestroyWindow(hwnd.Handle);

            HandleRef handleRef = new HandleRef(this, hwndHost);

            Win32Native.SendMessage(handleRef, Win32Native.WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
        }

    }

the Notepad is displayed at my WPF form.But I cannot operate the Notepa

I get an error only when Same User Name was created in Different Application ID.

Input string was not in a correct format.

line- gluserID = Convert.ToString(command.ExecuteScalar())

Here is my code

If User.Identity.IsAuthenticated Then
            Dim UserIdentity As MembershipUser = Membership.Providers("CustMembershipProvider").GetUser(HttpContext.Current.User.Identity.Name, False)
            If UserIdentity IsNot Nothing Then
                'auth user
                Dim currentUserID As String = UserIdentity.ProviderUserKey.ToString()
                Dim connectionString As String = ConfigurationManager.ConnectionStrings("EmpCustomData").ConnectionString
                Dim queryString As String = String.Format("SELECT CustomerID FROM Customers INNER JOIN aspnet_Users ON Customers.NetUserID = aspnet_Users.UserId WHERE aspnet_Users.UserI

Just deployed Office Web Apps to our SharePoint 2010 environment. This environment was upgraded from a fresh deployment of SharePoint 2007 SP2. Configured all of the Application Services per http://technet.microsoft.com/en-us/library/ff431687.aspx, but I cannot open an Excel workbook, receiving the error: "This workbook cannot be opened because it is not stored in an Excel Services Application trusted location. To create an Excel Services Application trusted location, contact your system administrator."

Our farm has a single front end server and a single database server. The shared application pool is called SSP1_v14 (renamed during the upgrade from SSP1?). Our existing site had its visual style upgraded during the conversion. An in-place upgrade had been performed.

I went to Central Administration > Excel Services Application > Trusted File Locations and the default entry for address http://, Location Type: Microsoft SharePoint Foundation, Trust Children had already been created. Various blog posts on the internet indicate that this entry is all that's needed to setup a trusted location for all SharePoint sites, but it's not working here. I've tested Word document viewing with the Word Web App and that works fine.

Any ideas?

We currently have a visual basic 2010 application that uses a backend microsoft access 2007 accdb database. Our users have recently reported that since upgrading to office 2010 they can not connect to their databases. We had specifically targeted our application to x86 as the database drivers for 2007 are only 32 bit.

On our developmnent we have now installed Office 2010 64-bit and switched our application to target any cpu. On first doing this the application seems to crash during closing a connection to the database given us no debug information, after looking on search engines  for any helpful information we did find an interesting thread that pointed out 2010 x86 by default. Further investigation has led us to believe it is not the access database drivers that are causing the issue but something else that is specific to 64-bit. We have removed any dlls that we are currently referencing that may be using any unmanaged code, but still get the same issues. Are there any known problems with developing Windows database application 64 bit in Studio 2010 any help or guidance would be appreciated.