MySQL FullTrust Mode Issue on ASP.NET 2.0 (A Fix)

To those out there having an issue with the MySQL .NET Connector on ASP.NET 2.0, here's a way to make the MySql.Data.dll work on shared hosting.

Problem: After debugging your site on your machine with Visual Studio 2005, everything seems to work fine, but after publishing it to your host server, you get a server error with this:

System.Security.SecurityException: That assembly does not allow partially trusted callers.

Solution: Recompile the library with a few changes to the AssemblyInfo.cs file.

The solution file is typically located in C:\Program Files\MySQL\MySQL Connector Net 1.0.9\Source\MySqlClient, and the modified MySql.Data.dll file will be located in C:\Program Files\MySQL\MySQL Connector Net 1.0.9\Source\MySqlClient\bin\net-2.0\Release. These paths may vary depending on your chosen installation settings and version.

Open the solution in Visual Studio and open AssemblyInfo.cs, and add the following code:

using System.Security; [assembly: AllowPartiallyTrustedCallers()]

Compile, and use the modified library located in the folder mentioned above. This fix should allow you to use the library without any problems.

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Tags: .NET, ASP.NET, C#, MySQL, Programming

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