webpage access - Page 210

MDB 2 CSV batch.

- by darhipo

Does anybody know what I could use to write a script to convert all MDB files in a directory to CSV files? I'm working on Windows but have been using Cygwin for some work.

How to inherit from DataAnnotations.ValidationAttribute (it appears SecureCritical under Visual Stud

Hi, I have an [AllowPartiallyTrustedCallers] class library containing subtypes of the System.DataAnnotations.ValidationAttribute. The library is used on contract types of WCF services. In .NET 2/3.5, this worked fine. Since .NET 4.0 however, running a client of the service in the Visual Studio debugger results in the exception "Inheritance security rules violated by type: '(my subtype of ValidationAttribute)'. Derived types must either match the security accessibility of the base type or be less accessible." (System.TypeLoadException) The error appears to occure only when all of the following conditions are met: a subclass of ValidationAttribute is in an AllowPartiallyTrustedCallers assembly reflection is used to check for the attribute the Visual Studio hosting process is enabled (checkbox on Project properties, Debug tab) So basically, in Visual Studio.NET 2010: create a new Console project, add a reference to "System.ComponentModel.DataAnnotations" 4.0.0.0, write the following code: . using System; [assembly: System.Security.AllowPartiallyTrustedCallers()] namespace TestingVaidationAttributeSecurity { public class MyValidationAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute { } [MyValidation] public class FooBar { } class Program { static void Main(string[] args) { Console.WriteLine("ValidationAttribute IsCritical: {0}", typeof(System.ComponentModel.DataAnnotations.ValidationAttribute).IsSecurityCritical); FooBar fb = new FooBar(); fb.GetType().GetCustomAttributes(true); Console.WriteLine("Press enter to end."); Console.ReadLine(); } } } Press F5 and you get the exception ! Press Ctrl-F5 (start without debugging), and it all works fine without exception... The strange thing is that the ValidationAttribute will or will not be securitycritical depending on the way you run the program (F5 or Ctrl+F5). As illustrated by the Console.WriteLine in the above code. But then again, this appear to happen with other attributes (and types?) too. Now the questions... Why do I have this behaviour when inheriting from ValidationAttribute, but not when inheriting from System.Attribute ? (Using Reflector I don't find special settings on the ValidationAttribute class or it's assembly) And what can I do to solve this ? How can I keep MyValidationAttribute inheriting from ValidationAttribute in an AllowPartiallyTrustedCallers assembly without marking it SecurityCritical, still using the new .NET 4 level 2 security model and still have it work using the VS.NET debug host (or other hosts) ?? Thanks a lot! Rudi

Search Results

Search found 34060 results on 1363 pages for 'webpage access'.

Page 210/1363 | < Previous Page | 206 207 208 209 210 211 212 213 214 215 216 217 | Next Page >

- by darhipo

- by codetuner

- by Hoang Pham

- by Abdullah BaMusa

- by Thomas Bøg Petersen

- by kudorgyozo

- by Lars

- by CREFLY

- by Simon

- by Peter Nielsen

- by Frank Developer

- by PowerUser

- by Dan

- by Max Gontar

- by Horatiu Paraschiv

- by intruesiive

- by Mark

- by Noldorin

- by munchine

- by david

- by Kenny Winker

- by jasonh

- by munchine

- by BSchlinker

- by Howard

< Previous Page | 206 207 208 209 210 211 212 213 214 215 216 217 | Next Page >