References for Excel

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I am trying to transfer Excel file data to a MS SQL database.

I added References for Excel 12.0:
Microsoft.Office.Interop.Excel
Interop.ADODB
Interop.ADOR
Interop.ADOX
Interop.DAO

Error Code:

CSS

Could not load type 'Microsoft.Office.Interop.Excel._Application' from assembly 'Excel, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. The type is marked as eligible for type equivalence, but the containing assembly is not loaded as fully trusted.
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.TypeLoadException: Could not load type 'Microsoft.Office.Interop.Excel._Application' from assembly 'Excel, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. The type is marked as eligible for type equivalence, but the containing assembly is not loaded as fully trusted.

Posted 15-Jan-14 8:20am

teledexterus

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ImmeShea 27-Nov-15 2:58am

You should reconsider using of excel's automation in .NET web application, see here why (in short it's not intended to be use on server side and you can encounter a lot of unexpected issues). Instead you could try out a C# component for excel's processing, which is safe to use in ASP.NET environment.

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Ron Beyer · Answer 1 · 2014-01-15T08:26:00

Solution 1

See this StackOverflow[^] answer.

Requires you to disable embedding interop assemblies and set a full trust parameter in the configuration file.

Posted 15-Jan-14 8:26am

Ron Beyer