.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Suitable Stream class for TCP communication

Posted By:      Posted Date: October 05, 2010    Points: 0   Category :.NET Framework


I have client and server that communicate with byte arrays.

The array is composed from [pavket id][packet size][data] in LITTLE_ENDIAN byte order.

The [data] is also build with the following format: 4 bytes(int) for chunk size, chunk, 4 bytes chunk size.....

Currently, I use a plain stream and reads the byte array and dissecting the data part by part.

Is there a library class where I can read int,short,string... from the byte array by start + length?



View Complete Post

More Related Resource Links

File Stream Class

 I am trying to write to a text file while protecting it from concurrent access. What is the advantage of fileStream.lock ? (when I created a filestream in the code below, the file seemed to be protected from other processes using it). I am not sure if I need to use filestream.lock below. Please advise ..            Public Shared Sub writeToLogFile(ByVal logMessage As String)         Try             Dim strLogMessage As String = String.Empty             Dim strLogFile As String = System.Web.HttpContext.Current.Server.MapPath("~/Log.txt")             Dim swLog As StreamWriter             strLogMessage =  DateTime.Now.ToLongTimeString().ToString() & " ==> " & logMessage             Dim fileStream As New FileStream(strLogFile, FileMode.Append)            ' Lock all of the file after creating the filestream object             fileStream.Lock(0, fileStream.Length)      &nb

Full duplex pc to half duplex serial communication with SerialPort class in C++ (but any language wi


Hello.  I am a bit new to the .NET environment, and though I feel I was able to get a good handle on most of the basics of .NET, I believe I've encountered a problem beyond the basics.  I am trying to talk with a device called a ColorPAL that uses asynchronous serial communication, but it is half-duplex instead of full-duplex.  I am able to send it the hex string commands that it wants just fine with the TX line.  However, I find myself unable to read because the RX isn't connected to anything.  Basically what I want to do is that I want to be able to swap the TX line to become a RX line so that I can then read line of the half-duplex.  I read that there is a PinChanged event, so it lead me to believe there is a way to change pins??   If the RX line is very high impedance I could connect it to the TX line, but I have no idea about that.


How can I get a full duplex to read a half-duplex using the visual studio software?


Here is the code I'm using, in case that helps.

#include "stdafx.h"
#include <Windows.h>

using namespace System;
using namespace 

Class Diagrams

Class diagrams show the static structure of the systems. Classes define the properties of the objects which belong to them. These include:

Attributes - (second container) the data properties of the classes including type, default value and constraints.

WCF Tutorial - Basic Interprocess Communication

What the heck is WCF? For a long time, I couldn't tell you exactly what it was. And honestly, I still don't think I can. WCF is such a broad concept that it's hard to boil down into a concise explanation. When I finally started reading about it, and getting beyond the concepts, things started to clear up. That's what today's tutorial is about - cutting through all the concepts and just use WCF to build a basic server and a basic client.

Getting Started with Windows Communication Foundation

Windows Communication Foundation (WCF) provides a unified framework for rapidly building service-oriented applications that makes it easy to build and consume secure, reliable, and transacted Web services. It unifies the capabilities in ASMX, WSE, Remoting, COM+, and MSMQ; therefore developers need to learn only one programming model.

Creating a Simple Class in C#

The second article in the C# Object-Oriented Programming tutorial describes how classes are created in C# and how behaviour, in the form of publicly visible and private, hidden methods can be added. This demonstrates some of the uses of encapsulation

Static Class for Beginners

In general, the members of a class can be accessed by instance of that class when they are in public, but there comes a situation to access or call members of a class without an instance and this can be achieved by declaring them as static

abstract away the source of the connection string using a class with a static property.

ASP.NET provides a configuration system we can use to keep our applications flexible at runtime. In this article we will examine some tips and best practices for using the configuration system for the best results.

The element of a web.config file is a place to store connection strings, server names, file paths, and other miscellaneous settings needed by an application to perform work. The items inside appSettings are items that need to be configurable depending upon the environment, for instance, any database connection strings will change as you move your application from a testing and staging server into production.

Let's abstract away the source of the connection string using a class with a static property.

Serial Communication with the .NET Compact Framework

Learn how to make your applications communicate over a serial port and how to handle common issues when implementing serial solutions. After a general discussion about serial communication and a common serial communication standard, this article demonstrates a practical use of the technologies through sample source code written in C#.

MessageQueue Class

This sample demonstrates two way communications using message queuing between a device application and a desktop application. One application sends book order messages to a message queue and another application receives these book orders from the message queue and responds to the device queue that the orders have been processed.

Serial Port Communication Read and Write using C#.net

In this simple article you will learn that how you can Open and read COM port data using System.IO.Ports Namespace.
Simply just create New Project of windows application in C#.

Import ServiceProcess APIs
using System.IO.Ports

Imports System.IO.Ports

Write Parsing functions which parse port data according to attached device

How to change the default page base class?


I've tried setting the <pages pageBaseType="DynamicWebPage" /> value in web.config, but when I response.write out the page type, I'm still getting Microsoft.WebPages.WebPage.

I'm simply trying to sub-class WebPage and add some additional functionality such as a dynamic PageData dictionary similar to Phil Haack's dynamic ViewData dictionary.



Event ID 1011 - DefaultAppPool World Wid Web Pub. Serv. fatal communication error

We have a Windows 2003 server running IIS6 1.1 Framework. We have also installed a DNS and Active Directory in the same machine.

We're randomly getting the error you can see below. Sometimes it causes the recycling of process w3wp.exe (which on my understanding represents the application pool worker processd) and other times results on this process hanging and not responding to any request. To do iisrest temporarly solves the problem.

We were pointed to a possible permissions problem between the user we were runnig the DefaultAppPool with and registry entries used by the iis. We noticed the default predifined user we used, Network Service, wasn't found in the Active Directory, so we changed it by the default configurable user, IWAM_MACHINE_NAME, which is under the IIS_WPG Active Directory Grupo, which, in theory has the correct permissions to run the application pool.

Well, none of this worked and we are still getting this error.

This is driving us crazy and think the problem might have to do with having the Domain Controller/Active Directory and the IIS6 running on the same machine. We'll try now uninstalling this DC pointing to another one to see what happens.

Any help would be appreciated.

Thanks in advance,


Event Type: Warning

Can I replace the EntityObject as base-class in Entity Designer 3.5 sp1?


I'm using EF3.5sp1 for a project, and I've been working around many of its problems... as such, my entity partial classes have a lot of logic in them for change-tracking and whatnot.  Obviously, I'd like to factor this logic out into a common base class, but of course all my objects must derive from EntityObject.  Is it possible to tell them to derive from some class of my own invention (which would actually likely derive from EntityObject themselves)?

I'd rather avoid editing the EDMX file unless the changes will be safe on entity-model-update, since I'm still making changes to the database schema in this early state of my project.


Also, is there any good workaround for the fact that the change isn't tracked when you change EntityReference.EntityKey?

Singleton Pattern and Abstract Class


I know what Singleton Pattern means and Abstract class means.

What I wanted to know was how would this apply to real world.

Could anyone give me any good example or simple explanation.

Say I have a simple website, why would I use any of the above if any.

Why would it simplify my architechture.

Thanks in advace. 

How to implement custom HttpContext for each request under class that implements IHTTPHandler


Hello All,

I created an application and implemented IHTTPHandler for all incoming request ending with ".aspx" extension.

Under "ProcessRequest" module, I am creating an instance of HttpContext (with URL attributes different from my application's URL i.e. if I am working on localhost then speciying Yahoo.com as its URL) and assigning it to "context" which comes as method argument.

After redirection, an error is generated. Also, the custom HTTPContext is not passed to the requested page (default.aspx, in my case.)

Code is as follows.

    Public Sub ProcessRequest(ByVal context As System.Web.HttpContext) Implements System.Web.IHttpHandler.ProcessRequest
            Dim requestedUrl As String
            Dim targetUrl As String
            Dim urlLength As Integer
            'Save settings which will be used while redirecting to appropriate page
            requestedUrl = context.Request.RawUrl
            If requestedUrl.IndexOf("?") >= 0 Then
                targetUrl = requestedUrl.Substring(0, requestedUrl.IndexOf("?"))
                targetUrl = requestedUrl
            End If
            If targetUrl = Nothing Or targetUrl.Length = 0 Then
                targetUrl = requestedUrl
            End If

Using a GenericHandler as a WebResource inside a Class Library



I hope this is the right place to ask this question.

I'm trying to make a control class library. I want to have a GenericHandler as a WebResource so I could call it from the web project that will use that control.

I need this handler will get parameters from the query string and return JSON data acourding to what it get in the QS.

I know how to create JS and images WebResources, so I tried the same on a generic handler I added to the class library project but all it does is return the source of the handler file and not the result.


Is what I'm trying to do possible? If so, what should I do?


Thank :-)

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend