Sql Security Error

Question

Hi there,
I created an app that contains list in it, I'm overriding ItemAdded class to do calculations and some parsing after item is created.
I want to store some number in SQL server and later add those in calculations.
My connection string:
string result;
            string connectionString = "Data Source=MyDB;Initial Catalog=MyCatalog;Trusted_Connection=true;User ID=12345;Password=12345;";
            using (SqlConnection connection = new SqlConnection(connectionString))
                using (SqlCommand command = new SqlCommand(
                             "SELECT blalalala, connection))
                    connection.Open();
                    result = (string)command.ExecuteScalar();                   
And i get error, on line "connection.Open();":"An exception of type 'System.Security.SecurityException' occurred in System.Data.dll but
was not handled in user codeAdditional information: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed."
In web.config file i got "<trust level="Full" originUrl="" legacyCasModel="true" />" so problem shouldn't be there.
Any Ideas?

Answer 1

Hi,
If you want to access database in Event Receiver, in SharePoint, Business Connectivity Services would be a preferable choice for this requirement.
http://technet.microsoft.com/en-us/library/ee661740(v=office.14).aspx
http://www.dotnetcurry.com/showarticle.aspx?ID=794
Then in the Event Receiver, you can work with the data from database in an External list just like work with a normal SharePoint list:
http://zimmergren.net/technical/sp-2010-programmatically-work-with-external-lists-bcs-in-sharepoint-2010
Best regards,
Patrick
Patrick Liang
TechNet Community Support