c#-4.0

问题 Software used: Windows 7 64 bit Ultimate, .Net 4, SQL Server 2008 R2. select @@version returns: Microsoft SQL Server 2008 R2 (RTM) - 10.50.1617.0 (X64) Apr 22 2011 19:23:43 Copyright (c) Microsoft Corporation Developer Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1) (Hypervisor) To reproduce, and assuming you have a local sql server 2008 R2 instance, paste the following code in linqpad and run it as a Program. It blows up with: OLE DB provider 'STREAM' for linked server

问题 I want to compress and then encrypt my data, and for improved speed (by not having to write to byte arrays and back) decided to chain the streams used for compression and encryption together. It works perfectly when I write (compress and encrypt) the data, but when I try to read the data (decompress and decrypt), the Read operation breaks - simply calling Read once reads exactly 0 bytes, because the first Read always returns 0. Looping as in the below code almost works, except that at a

问题 is it possible to use System.ComponentModel.DataAnnotations and it's belong attribute(such as Required , Range ,...) in WPF or Winforms class? I want put my validation to attributs. thanks EDIT 1: I write this : public class Recipe { [Required] [CustomValidation(typeof(AWValidation), "ValidateId", ErrorMessage = "nima")] public int Name { get; set; } } private void Window_Loaded(object sender, RoutedEventArgs e) { var recipe = new Recipe(); recipe.Name = 3; var context = new ValidationContext

问题 I have two collections List<Car> currentCars = GetCurrentCars(); List<Car> newCars = GetNewCars(); I don't want to use foreach loop or something because i think there should be much better way of doing this. I am looking for more efficient way to compare this collections and to get results: List of cars which are in newCars and not in currentCars List of cars which are not in newCars and in currentCars Type Car has int property Id. There was an answer, which is already deleted saying What i

问题 How can I fetch all the record from my Active Directory Server in asp.net c#? 回答1: Make a connection string in LDAP providing username and Password which can communicate with the server and have Administrator rights. Suppose DC is me.com and username and password are the password of that user Id which is having Administrator rights . DirectoryEntry rootDSE = rootDSE = new DirectoryEntry("LDAP://OU="",OU=" ",dc="me",dc=com", username, password); DirectorySearcher search = new DirectorySearcher

问题 How can I fetch all the record from my Active Directory Server in asp.net c#? 回答1: Make a connection string in LDAP providing username and Password which can communicate with the server and have Administrator rights. Suppose DC is me.com and username and password are the password of that user Id which is having Administrator rights . DirectoryEntry rootDSE = rootDSE = new DirectoryEntry("LDAP://OU="",OU=" ",dc="me",dc=com", username, password); DirectorySearcher search = new DirectorySearcher

问题 How can I fetch all the record from my Active Directory Server in asp.net c#? 回答1: Make a connection string in LDAP providing username and Password which can communicate with the server and have Administrator rights. Suppose DC is me.com and username and password are the password of that user Id which is having Administrator rights . DirectoryEntry rootDSE = rootDSE = new DirectoryEntry("LDAP://OU="",OU=" ",dc="me",dc=com", username, password); DirectorySearcher search = new DirectorySearcher

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test