Internet Control..

Visual C# General

Windows Tech ‹ Visual C#
- Archive
  - Smart Device
  - Visual C#
  - VB
  - VC++
  - Office
  - ISV
  - VFP
  - Game
  - Visual Studio
  - SharePoint
  - SQL Server
  - Architecture
  - VS 2008
  - VS Express
  - Windows Live
  - IE
  - Windows Vista
  - Dotnet
  - Windows Forms

- Previous
  - 1
    - Processor efficient loops (notifications). What is the timeframe within which your thread must respond to the item appearing in the queue If within a second or so will do, you can just write a polling loops that calls something like Thread.Sleep(1000) every iteration. (You'll need to check two conditions for each iteration, of course: (i) is there anything in the queue and (ii) should the poll loop terminate for some other reason.) Tag: Visual C# General Internet Control.. Visual C#
  - 2
    - DatePicker Hi, Could you please check the spell error and explain the situation again Cause I can't catch the meaning. Thanks Tag: Visual C# General Internet Control.. Visual C#
  - 3
    - ref keyword You can't. Consider what you're asking for. You're basically saying that when the called method changes some of the elements of the "pars" array, you want that change to be reflected in the variable passed in by the caller. This isn't supported, nor is it clear what the value would be. Perhaps you could explain the larger problem you're trying to solve -Tom Meschter Software Dev, C# IDE Tag: Visual C# General Internet Control.. Visual C#
  - 4
    - Cast to instance of type typeof only creates an instance of Type, which is documented as only being able cast to to Object, MemberInfo, _Type and IReflect. You have to create an instance of your type or a subclass of that type in order to cast to that type Tag: Visual C# General Internet Control.. Visual C#
  - 5
    - copying a windows folder structure to sql server That wont be that tough to do, I suppose the most important question is why are you doing it Tag: Visual C# General Internet Control.. Visual C#
  - 6
    - Error in accessing DLL: "Attempted to read or write protected memory." If you're PInvoking methods in one of those DLLs it's likely that you haven't defined the DllImport attributes correctly. Can you verify this works on a local drive/folder to confirm it's not a permissions problem Tag: Visual C# General Internet Control.. Visual C#
  - 7
    - Completely dynamic method invocation Hmm.. to understand how to answer your question, it might be helpful to understand what you're really trying to do. For example, the way the event model works does exactly what you want, in a roundabout sort of way: someObj.SomeEvent += SomeHandler(yourMethodName); You're giving it the method to call. It has NO idea what that method is, and invokes it blindly. The compiler does check the method signature, but there are ways around that. So what is your real purpose in wanting blind method invokation There are ways to do this but the pattern sort of depends on how you'll use it. Tag: Visual C# General Internet Control.. Visual C#
  - 8
    - Help Search doesn't work Ok so you're using the online version of MSDN. Here are the steps I would recommend that you use to diagnose the problem: Confirm you are running VS2005 SP1 with the Vista refresh Verify your help settings in Tools\Options -> Environment -> Help Online -> Try online first, then local (or Try local first, then online) Are you using external or integrated help (General) In general you won't get anything displayed initially as the list of potential sites will be displayed in a separte list. You would then be able to select a specific site. Do you get any sites listed Do all of them generate the same error Unlikely but check your firewall to ensure that VS2005 is not blocked (for integrated help) and Dexplore (for external help) Can you access the information outside VS2005 The URL for TabControl is http://msdn2.microsoft.com/en-us/ms749171.aspx Do other help features like the contents or the index work Michael Taylor - 7/11/07 http://p3net.mvps.org Tag: Visual C# General Internet Control.. Visual C#
  - 9
    - Help on Conditional operator ?: It would be helpful if you provide the error... but, off hand, you could try: cmdP0.Parameters["@Medical"].Value = (searchDate != null searchDate: DBNull.Value); Tag: Visual C# General Internet Control.. Visual C#
  - 10
    - debuging multi thread application problem When you throw (or don't catch) and exception in the DoWork event it gets saved and will rethrow in the RunWorkerCompleted event, as a System.Reflection.TargetInvocationException when you try to get the result. The original exception is stored in the InnerException property. This is the ideal way of doing what you want because it gets the exception back to the GUI thread and you can then reliably inform the user of the problem via the GUI. For example: Code Snippet private void backgroundWorker1_DoWork( object sender, DoWorkEventArgs e) { throw new System.Net. WebException (); } Which can be caught in the completed event handler: Code Snippet private void backgroundWorker1_RunWorkerCompleted( object sender, RunWorkerCompletedEventArgs e) { try { String text = e.Result as String ; } catch (System.Reflection. TargetInvocationException targetInvocationException) { MessageBox .Show(targetInvocationException.InnerException.GetType().FullName + " thrown while communicating with Web Service" , "Error" ); } } ...note the use of the InnerException. Tag: Visual C# General Internet Control.. Visual C#
  - 11
    - Why Won't My App Run on Windows 2003 Server? Hi it could be that - you are missing some dll's specific to you application... - there are some security constraints - ... what is the startup code of your application Could you modify your code to open a form, and by clicking on a button to execute your code, thus hopefully getting an error message also, did you install your app, or just do copy paste of an exe Tag: Visual C# General Internet Control.. Visual C#
  - 12
    - import C# Form as ActiveX in Internet Explorer Loads first time and doesnot after some change and recompilation, Hmmmm! It may be version issue. Open AssemblyInfo.cs and try to fix the AssemblyVersion attribute by removing * to 0 or some other numner like [assembly: AssemblyVersion ( "1.0.0.0" )] Make sure in Subsequent builds your assembly version remains the same. Do it very first time when you create your control. I hope this will work. Note: A class library by defaults use [assembly: AssemblyVersion ( "1.0.* )] or something like that which means that this will auto increment version whenever a new build is created with some change in code. This may be cause of the problem. Best Regards, Rizwan aka RizwanSharp Tag: Visual C# General Internet Control.. Visual C#
  - 13
    - Text encoding mismatch, .NET 1.1, console vs windows app Arent there far better ways of doing process interop than reading/writing standard in/out You seem to have the source for both apps... Tag: Visual C# General Internet Control.. Visual C#
  - 14
    - Threading Question Call Doevents after thread start Application.DoEvents(); Refer more about this in http://msdn2.microsoft.com/en-us/library/system.windows.forms.application.doevents.aspx Tag: Visual C# General Internet Control.. Visual C#
  - 15
    - opening other programs? Here you go.. http://support.microsoft.com/kb/306222 theTroll Tag: Visual C# General Internet Control.. Visual C#
  - 16
    - Help - How to create test code Check out FX cop to look for deficiancies in code. FxCop Tag: Visual C# General Internet Control.. Visual C#
- Next
  - 1
    - XML over the Serial Port Maks wrote: Is there a better way to do the job than read bytes from the port to an array and then trick them into XML document. I will appreciate design ideas or the snippet. Trick Like making the bytes jump and roll over <g> The job of reading data from any type of socket is to pull it off the port as fast as possible so there is no loss of data. Those packets are handed off to a manager that combines and coverts them for consumption by other layers in the application. If those bytes are meant as Xml, then they will have to be converted to ascii and loaded into an XmlDocument, there is no way around that. I suggest you have a multi-threaded app, where the thread monitoring the socket only pulls data off of the socket and places it raw onto a queue to be pulled by another thread, whose sole job it is to convert it to an appropriate format that can be consumed by the business layer of the application. Don't make the mistake of trying to do combination and reading of the port, otherwise one risks dropping packets. Tag: Visual C# General Internet Control.. Visual C#
  - 2
    - C#.NET 2005 Windows Service Crashing automatically Hi Rahul, I don't have a straight answer to your problem, but usually when a .NET program crashes straight on, not throwing exceptions that "you" can catch, it is usually something outside the Framework, or its inner workings, and most of the time, because of us, some code that isn't explicitly releasing objects or using stuff in a wrong way. You seem to be using Interop for the Office thingie... do you: System.Runtime.InteropServices.Marshal.ReleaseComObject(interopObject) after your done using it You can also try to use some kind of "Instrumentation" and make your windows service log its action into a text file or database, that way it might also help you to track down if it always crashes doing some kind of action, and who knows, narrow your scope of the problem. Hope it helps, Fernando Nunes Tag: Visual C# General Internet Control.. Visual C#
  - 3
    - Problems with Intellisense popup behavior Hi Earl, There is no timing setting as to how long an intellisense should be up. Hitting ESC or typing a commit character will dismiss the list and commit the preselected item if any. To know what those commit characters are, go to Tools | options | text editor | C# | intellisense and there is an edit box with the default list of commit characters that you can then modify if you like. I have never heard anything like this. Do you have any thing else on your machine that is running at the time of VS and grabbing the focus Losing the focus will make the intellisense go away too. Does it happen every time you are using VS in every project Is it possible to attach a video of this issue Let me know, Thanks Suma Sushilendra [MSFT] Tag: Visual C# General Internet Control.. Visual C#
  - 4
    - referencing and using an assembly in different folder than App you can load assembly using reflection but then all referenced classed should be used in your code with reflection which is not very comfortable. As far as I understood you want to store all shared assemblies in shared folder (not in GAC) and to point applications to search there Locating the Assembly through Codebases Codebase information can be provided by using a <codeBase> element in a configuration file. This codebase is always checked before the runtime attempts to probe for the referenced assembly. If a publisher policy file containing the final version redirect also contains a codebase, that codebase is the one that is used. For example, if your application configuration file specifies a codebase, and a publisher policy file that is overriding the application information also specifies a codebase, the codebase in the publisher policy file is used. If no match is found at the location specified by the <codeBase> element, the bind request fails and no further steps are taken. If the runtime determines that an assembly matches the calling assembly's criteria, it uses that assembly. When the file at the given codebase is loaded, the runtime checks to make sure that the name, version, culture, and public key match the calling assembly's reference. Note Referenced assemblies outside the application's root directory must have strong names and must either be installed in the global assembly cache or specified using the <codebase> element. this is quote from here http://msdn.microsoft.com/library/default.asp url=/library/en-us/cpguide/html/cpconstep4locatingassemblythroughcodebasesorprobing.asp click on above link for more info HTH Tag: Visual C# General Internet Control.. Visual C#
  - 5
    - SP2 causing error? Can you describe these issues Tag: Visual C# General Internet Control.. Visual C#
  - 6
    - Looking for possible AssemblyVersion asterix override using config file. Check this project to do it in code, this project to do it with macros. Off topic for the BCL forum, moved to C# IDE forum. Tag: Visual C# General Internet Control.. Visual C#
  - 7
    - using System.Collections 1) Get Google Data API .Net version http://code.google.com/p/google-gdata/ 2) Unpack the zip file to some folder 3) Under the folder you can find clients\cs\lib\Release, which contains the dlls you need 4) In your solution explorer, right click on "References..." and say "Add References..." 5) Go to "Browse" tab to browse to the dll folder in step 3. 6) Click on the Dll(s) you need - in this case Google.GData.Client.dll and click "OK" 7) Now you can do the using Google.GData.Client stuff. Tag: Visual C# General Internet Control.. Visual C#
  - 8
    - limit property values - Verify in the setter part of the property that the new value is really a value that exists in the xml file... - Use a Combobox (Fill it with items that are in the xml file, DropDownStyle property set to DropDownList) so the user is restricted to valid choices.... Tag: Visual C# General Internet Control.. Visual C#
  - 9
    - How to use multithreading in for loop? If you are updating multiple databases and the databases are slow to respond, you may consider starting a new thread for each database, rather than starting a single thread that loops through all the databases. This will reduce the total time needed to complete the operations, assuming that the databases are on different servers or on a single server that can scale if it receives multiple queries at the same time (for instance, if it has multiple CPUs and multiple spindles for the database files). If there are many databases, you will want to establish a limit for the number of updates in progress at a given time, so as not to launch dozens of simultaneous threads. The async delegate that you are using is reasonable, but is not the only way to launch the threads. A different approach is to create a System.Threading.Thread to start the different threads. This lets you adjust the priority of each thread you are launching. Another possibility, if you are using Sql Server databases, is to use the BeginExecuteNonQuery and similar methods of the SqlCommand object to send the command that updates you databases. Tag: Visual C# General Internet Control.. Visual C#
  - 10
    - How to launch application from service on current user's desktop? This sucks. In my testing, I guess that programs launched from a service, are launched under the same SessionID as services.exe. So basically who ever logins in first, launches services.exe which in turn initializes all the services installed on the computer. Upon startup, Services.exe enumerates through all registry subkeys located under the HKEY_LOCAL_MACHINE\Services registry key in the protected registry, where each subkey represents a service. Services.exe then uses the information located in the subkeys to initialize each service, one at a time, and in the order specified in the registry. Is there any way to change the session ID of a running application Tag: Visual C# General Internet Control.. Visual C#
  - 11
    - c# Insert into Sql sql does have a command that will return that last Identity from a command, @@IDENTITY or SCOPE_IDENTITY which is more specific to stored procedures and functions triggers etc... you should be able to just return this value to some var Tag: Visual C# General Internet Control.. Visual C#
  - 12
    - How to set the default browser setting in Visual studio 2005 The default browser used will be whatever the default browser is for the OS AFAIK. I am aware of at least one problem where FireFox somehow hijacked my HTM files even though IE was set up as the default browser. I never did resolve that and eventually ended up uninstalling it. However you don't have to use the default browser. In the settings for the web application you can specify what program to use explicitly. Sort of annoying that you'll have to do this each time you start a new project but it is better than nothing. It is available under the Web tab in the project properties. You'll have to specify the IE program and the arguments to use but it'll work. Ultimately though you should probably run IE and tell it to become the default browser if that is what you want to use. Michael Taylor - 4/4/07 http://p3net.mvps.org Tag: Visual C# General Internet Control.. Visual C#
  - 13
    - How to increase the length of DirectoryInfo[] Sorry, can you explain further What do you mean by increasing the length of DirectoryInfo[] DirectoryInfo[] declaration is just an array of DirectoryInfo objects Tag: Visual C# General Internet Control.. Visual C#
  - 14
    - Business Logic Layer Question When working on medium to large projects people generally use some sort of ORM (Object-Relational Mapping http://en.wikipedia.org/wiki/Object-relational_mapping ) to handle turning the tables into objects either dynamically or via code generation. This can cut out months of work when there are lots and lots of tables, but it can still take quite a while to get everything setup and ready. LINQ, which is included in .Net 3.5, is targetted at this problem and might well be worth looking at to see if its appropriate for your project. CLSA.Net ( www.lhotka.net ) is also supposed to be pretty good and a very complete solution. You can always access the tables directly rather than providing objects to interact with them but this can lead to lots of problems, bugs and work. The OO route provides a single location for each table if something needs to change or a bug to be fixed. It also can be more flexable and can help facilitate caching, concurrency issues, remoting and other stuff I've no doubt forgotten about Tag: Visual C# General Internet Control.. Visual C#
  - 15
    - How Can I read cookies of my machine About reading cookies in windows application, please check this thread and this thread. You can find several suggestions. Tag: Visual C# General Internet Control.. Visual C#
  - 16
    - question about using directive I believe they simply mean that if you specify usign System; that will not give you access to types in sub-namespaces like System.Data. Tag: Visual C# General Internet Control.. Visual C#

ElroyDSilva

Hi.
I'm an engineering student and i'm working on my project titled 'Internet Access Control' for our college.

Our college has a server connected to our network lab where internet is accessed. I'm using sockets programming and i would be glad if you tell me which classes i have to use along with the addressing considerations. The aim is to have the user (student) log in and the user can have access to internet only for a fixed amount of time. The server should maintain login information and keep a watch on the time for which the user has accessed the net.

I mainly need to know about how the program can know that Internet service has been started and ended, how should it do it

What are the packages involved
Thanks..

Re: Visual C# General Internet Control..

micvos

Programming this yourself is not that easy. You have to create a bridge yourself with two sockets connecting the user in the lab with the internet. Meausering the time is also quit difficult, since the protocol is stateless. People can look at an internet page will there is no network traffic. I suggest you'd look on the internet and try to find a program which gives you the functionality you want.

Re: Visual C# General Internet Control..

ThE_lOtUs

Check out the System.Net namespace, everything about internet/socket is there

http://msdn2.microsoft.com/en-us/library/system.net.aspx