SecurityException ASPOSE.CELLs ASP.NET

Aspose.Cells Product Family
1

Hi,
I’ve got a web application (asp.net) which uses aspose.cells DLL to generate and modify excel files. The problem I get is a SecurityException when I try to access the login page.
Any idea?
Here is the error:

Server Error in ‘/’ Application.

        <h2> <i>Security Exception</i> </h2></span>

        <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">

        <b> Description: </b>The

application attempted to perform an operation not allowed by the
security policy. To grant this application the required permission
please contact your system administrator or change the application’s
trust level in the configuration file. 

        <b> Exception Details: </b>System.Security.SecurityException:

Request for the permission of type ‘System.Web.AspNetHostingPermission,
System, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089’ failed.

        <b>Source Error:</b> <br><br>

        <table bgcolor="#ffffcc" width="100%">
           <tbody><tr>
              <td>
                  <code>

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.

              </td>
           </tr>
        </tbody></table>

        <br>

        <b>Stack Trace:</b> <br><br>

        <table bgcolor="#ffffcc" width="100%">
           <tbody><tr>
              <td>
                  <code></code><pre>[SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]<br>   System.Reflection.Assembly._GetType(String name, Boolean throwOnError, Boolean ignoreCase) +0<br>   System.Web.UI.Util.GetTypeFromAssemblies(ICollection assemblies, String typeName, Boolean ignoreCase) +201<br>   System.Web.UI.TemplateParser.GetType(String typeName, Boolean ignoreCase, Boolean throwOnError) +323<br>   System.Web.UI.TemplateParser.ProcessInheritsAttribute(String baseTypeName, String codeFileBaseTypeName, String src, Assembly assembly) +10867964<br>   System.Web.UI.TemplateParser.PostProcessMainDirectiveAttributes(IDictionary parseData) +365<br></pre>

              </td>
           </tr>
        </tbody></table>

        <br>

        <hr color="silver" width="100%" size="1">

        <b>Version Information:</b> Microsoft .NET Framework Version:2.0.50727.4959; ASP.NET Version:2.0.50727.4955

        </font><br>
2

Hi,


This exception is not related to Aspose.Cells API. I think the issue may be security permission sets for the IO operation, I think you are not allowed to access the file system completely. To confirm this exception, you may try to run the code to open the file without involving Aspose.Cells, e.g…, FileStream fs = File.Open(…)

You need to modify the proper security settings for your requirements. You may try to assign Administrative role for your web application.

For more elaboration on the said issue, please read below the technical articles from Microsoft
http://support.microsoft.com/kb/320268
http://support.microsoft.com/kb/555466

3

Hi,

It was a problem with Application Pool in IIS:

[IMG=http://www.image-share.com/upload/721/10m.jpg]

Thanks a lot for your help!!!