System.Security.SecurityException: 请求“System.Data.OleDb.OleDbPermission, System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089”类型的权限已失败。在 System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) 在 System.Security.CodeAccessSecurityEngine.Check(PermissionSet permSet, StackCrawlMark& stackMark) 在 System.Security.PermissionSet.Demand() 在 System.Data.Common.DbConnectionOptions.DemandPermission() 在 System.Data.OleDb.OleDbConnection.PermissionDemand() 在 System.Data.OleDb.OleDbConnectionFactory.PermissionDemand(DbConnection outerConnection) 在 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) 在 System.Data.OleDb.OleDbConnection.Open() 在 Maticsoft.DBUtility.DbHelperOleDb.Query(String SQLString) 在 Seo.model1() 在 Seo.Page_Load(Object sender, EventArgs e) 失败的操作是: Demand 失败的第一个权限的类型是: System.Data.OleDb.OleDbPermission 失败的程序集的区域是: MyComputer