How to detect network connection

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- Previous
  - 1
    - Dialing in with paramters Hi I have posted this question earlier as a part of another post. I am posting it again I want to dial from the server to client and pass parameters in the dialing process itself. How can this be done The idea is to have a windows service at the client, execute different exes depending on the parameters passed from the server Thanks Tag: How to detect network connection Tag: 75618
  - 2
    - Gracefully fail to start a service If my service fails to start, I'd like to notify the user and either display an error or direct them to check the event log to see more info. With Win32, you could return a non-0 number to the SCM during startup and a dialog would be displayed (by the SCM) showing the error number and directing the user to check the error log for further information. Is there similar functionality in .NET? I've tried throwing exceptions and calling Environment.Exit([some number]) in OnStart(), but both cause the SCM to display some useless dialog. How are you guys handling this? -Joel Tag: How to detect network connection Tag: 75613
  - 3
    - newline characters stripped from HTTPWebResponse Hi, I am downloading a .csv file and saving it locally. I am using HTTPWebRequest, getting the Response stream, and copying the stream to a file. It always works fine in the debugger, but most of the time the release version is stripping out many of the carriage returns/line feeds. My code: request = WebRequest.Create(myURL) response = request.GetResponse() Dim responseStream As Stream = response.GetResponseStream() Dim fileStream As New FileStream("myfile.csv", FileMode.Create) Dim r As New BinaryReader(responseStream) Dim w As New BinaryWriter(fileStream) Try Dim b(4095) As Byte Dim iBytesRead As Integer Dim iBytesTotal As Integer iBytesRead = r.Read(b, 0, b.Length) While iBytesRead iBytesTotal += iBytesRead w.Write(b, 0, iBytesRead) iBytesRead = r.Read(b, 0, b.Length) End While Finally w.Flush() fileStream.Close responseStream.Close End Try Any ideas why this might be happening? By the way, I am currently using WebClient.FileDownload, and it works fine, but I would still like to understand what I am doing wrong. Thanks, Brad Tag: How to detect network connection Tag: 75610
  - 4
    - aspnet_wp.exe could not be started Hi, I got "Server Application Unavailable" error when compile ASP.Net application. I have attached the the log from application event viewer: =================================== Event Type: Error Event Source: ASP.NET 1.1.4322.0 Event Category: None Event ID: 1084 Date: 5/24/2004 Time: 4:56:13 PM User: N/A Computer: JULIESHI-1 Description: aspnet_wp.exe could not be started. The error code for the failure is 80004005. This error can be caused when the worker process account has insufficient rights to read the .NET Framework files. Please ensure that the .NET Framework is correctly installed and that the ACLs on the installation directory allow access to the configured account. ===================================== I changed my domain password on the PC then found the .Net application is not working. Is this something related with permission? Could anyone tell me what to do? Thanks, Julie Tag: How to detect network connection Tag: 75609
  - 5
    - Scrollbar Event Hi, I have a windows application that's using the Datagrid to display records. The datasource has the potential of being very large, so I'm only retrieving a certain number of records at a time into a dataset. So, as I scroll down to the bottom of my datagrid, the next page of, say 100 records is appended to the dataset and so on. The code I'm using in the Scroll event is displayed below. For Each c As Control In DataGrid1.Controls If c.GetType Is GetType(VScrollBar) Then Dim scr As VScrollBar = CType(c, VScrollBar) If scr.Maximum < scr.Value + 13 Then mnPage += 1 MapClientsToList() 'Populates the dataset with another page of records. End If End If Next The Problem I'm having is that when I scroll to the bottom, the event is fired, the dataset is populated as desired. However, the event is called again and again in a kind of loop until there is no more data. The scrollbar is apparently being positioned to the bottom every time the data is retrieved, calling my procedure each time. Does anyone have any thoughts on this? Thankyou, Jeff Tag: How to detect network connection Tag: 75607
  - 6
    - How to load XML string into DataGrid and associate a element attribute to a column? Hi, I have a query return in a XML string. My XML result looks like: <activities> <activity> <subject>Win the Nobel</subject> <scheduledstart date="01/01/2005" time="00:00">2005-01-01T00:00:00-3:00</scheduledstart> </activity> </activities> If a dont have the scheduledstart element, the loading of result into a DataSet works fine, but when I try put the element and associate it with a column I get a error (something like "field scheduledstart not found"). See my code: NameTable nt = new NameTable(); XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt); XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.None); XmlTextReader tr = new XmlTextReader(strResultsXml, XmlNodeType.Document, context); DataSet ds = new DataSet(); ds.ReadXml(tr); BoundColumn colAssunto = new BoundColumn(); colAssunto.HeaderText = "Assunto"; colAssunto.DataField = "subject"; BoundColumn colInicio = new BoundColumn(); colInicio.HeaderText = "Inicio"; colInicio.DataField = "scheduledstart"; dgResultado.AutoGenerateColumns = false; dgResultado.Columns.Add(colAssunto); dgResultado.Columns.Add(colInicio); dgResultado.DataSource = ds; if (ds.HasChanges()) dgResultado.DataBind(); How I associate the scheduledstart date and time attributes to two columns or the content of the element to one column? Can somebody help me? Thank you for pay attention and sorry my bad english. :) []'s Vinícius Pitta Lima de Araújo Tag: How to detect network connection Tag: 75605
  - 7
    - Simple Server Question I'm writing a server which accepts connections with the following line: TcpClient client = listener.AcceptTcpClient(); Next, I'd like to be to determine the client's IP address. How can I do this? No relevant property/method in TcpClient exists. Tag: How to detect network connection Tag: 75595
  - 8
    - GetValue and ISerialization, object not constructed?? I've got this strange problem in a class that uses ISerializable to serialize a NameValueCollection During deserialization, in the object constructor, after using GetValue to get the NameValueCollection from SerializationInfo, the NameValueCollection is not usable. It throws a NullReferenceException from pretty much any property/method. It is usable after the object is deserialized, but not in the constructor. I've narrowed down the code to a small sample. Can an object not be used during the deserialization constructor? I haven't found any docs that say this shouldn't be allowed Code sample ================Snip============== using System using System.Collections.Specialized using System.IO using System.Runtime.Serialization using System.Runtime.Serialization.Formatters.Binary using System.Runtime.Serialization.Formatters.Soap namespace SerializationTes [Serializable public class SerializeMe : ISerializabl private NameValueCollection values public SerializeMe() values = new NameValueCollection() values.Add("string1", "hi") values.Add("string2", "there") protected SerializeMe(SerializationInfo info, StreamingContext context) values = (NameValueCollection) info.GetValue("values", typeof(NameValueCollection)) PrintMe(); // <-- why can this not access values?? // throws null reference exception inside values.get_Count( static void Main(string[] args // create one, print i SerializeMe serializeme = new SerializeMe() serializeme.PrintMe() // serialize it to fil FileStream file = new FileStream("c:\\test.txt", FileMode.Create) SoapFormatter formatter = new SoapFormatter() formatter.Serialize(file, serializeme) file.Close() serializeme = null // read it back and try to prin file = new FileStream("c:\\test.txt", FileMode.Open) try serializeme = (SerializeMe) formatter.Deserialize(file) serializeme.PrintMe(); // <-- this works, what is different here than print in constructor } catch(Exception e) Console.WriteLine("Failed: " + e) file.Close() public void PrintMe() Console.WriteLine("Items: " + values.Count) foreach(string sKey in values.Keys) Console.WriteLine("Key: " + sKey + ": " + values[sKey]) public void GetObjectData(SerializationInfo info, StreamingContext context) info.AddValue("values", values) Tag: How to detect network connection Tag: 75594
  - 9
    - Copying files via URI Hello all, What is the best way to copy files over a network? The remote server will be accessed via http, and the files copied to a local drive. I have tried using the System.IO.File class, but get URI errors when accessing the remote files. Thanks, Mike Tag: How to detect network connection Tag: 75593
  - 10
    - The Register directive for the referenced assembly Hello everybody! I am authoring my custom webcontrol and faced a very difficult problem. I have two assemblies: the first one contains some base classes and the second one contains a class which 1) Inherits a class from the first assembly 2) Contains references to the first assembly's class instances. When I drop the control from the second assembly onto a form, it adds references for both assemblies to the project, but it creates only one Register directive (which defines the TagPrefix) in the aspx code. At design time the control is displayed fine, but at run-time it throws an exception. To solve the problem one should manually add the Register directive for the base assembly. Does anybody know what should I do to that the Register directives for both assemblies were created automatically when one drops the control onto a form? Any help is appreciated Thank you in advance! Sergey Tag: How to detect network connection Tag: 75592
  - 11
    - VB/C# dependecies problem Hi, when I build my application I get a BC30652 error. To reproduce the error I have created a test solution following this steps: 0) I have create a empty solution named TestDep 1) I have create a VB Console application project named ConsoleApplication 2) I have create a C# Class library project named CsDll 3) I have create a VB Class library project named VbDll 4) I have add a new class to VbDll Public Class MyData Dim BaseString As String End Class 5) I have add a new member function to CsDll.Class1 public void Call(VbDll.MyData s) { } 6) I have modified the ConsoleApplication.Main sub Sub Main() Dim cs As New CsDll.Class1 Dim vb As VbDll.MyData cs.Call(vb) ' this is line 6 End Sub 7) A have add to CsDll the reference to the VbDll project 8) I Have add to Console Application the references to VbDll and VcDll project. If I rebuild the solution I get: ... C:\...\TestDep\ConsoleApplication\Module1.vb(6) : error BC30652: Reference required to assembly 'VbDll' containing the type 'VbDll.MyData'. Add one to your project. ... ---------------------- Done ---------------------- Rebuild All: 2 succeeded, 1 failed, 0 skipped After the rebuid the 'C:\...\TestDep\ConsoleApplication\bin' directory contains the following files: CsDll.dll CsDll.pdb VbDll.dll VbDll.pdb so all the needed assembly have been copied. What have I forget? Many thanks for any help. Marco. -- For direct reply change underscore to dot Tag: How to detect network connection Tag: 75584
  - 12
    - remove an item from a drop down list Hi, if anyone can help me with this i would apreciate it. I have 2 drop down lists, and between them, they have some values that are similar. How can i fill the second drop down and remove the item thats selected in the first drop down, so that the same item doesnt appear on both drop downs? i have tried doing this after i load both dropdowns: 2ndlist.Items.Remove(1stlist.SelectedItem.Text) BUT NOTHING HAPPENS. I still get the value on both drop downs it only works with the index: 2ndlist.Items.RemoveAT(1stlist.SelectedIndex) BUT its not right since drop downs dont have the same amount of items. Tag: How to detect network connection Tag: 75582
  - 13
    - General access denied error adding user to group when impersonating Hi, I'm successfully impersonating an administrative user (using KB306158). I know it is successful because after the impersonation, the WindowsIdentity.GetCurrent().Name returns the admin credentials (before the impersonation it returns the logged-in user's credentials). I'm also testing the user's role (using IsInRole()) and receive True for Administrator. However, when attempting to add a user to the group, I receive a 'UnauthorizedAccessException: General access denied error'. Assuming that I copy-pasted the code from KB306158, so that I have the impersonateValidUser() function: this.Response.Write("<BR>before: " + WindowsIdentity.GetCurrent().Name); // returns the current non-priviliged user if( impersonateValidUser(admin, domain, password) ) { this.Response.Write("<BR>after: " + WindowsIdentity.GetCurrent().Name); // returns the actual admin account WindowsPrincipal principal = new WindowsPrincipal( WindowsIdentity.GetCurrent() ); this.Response.Write("<BR>in role: " + Convert.ToString( principal.IsInRole( WindowsBuiltInRole.Administrator ) ) ); // returns True // ... (code which retrieves existing group and existing user ldap path) // fails 'UnauthorizedAccessException: General access denied error' grp.Properties["member"].Add(userPath); grp.CommitChanges(); } Thanks in advance, Elad. Tag: How to detect network connection Tag: 75580
  - 14
    - Architecture: Scalability VS Performance This is a design / inheritance qus. I have class Task. This is a base class for some specific tasks Say WorkOrderTask : Task TimeSheetTask : Task Now Task has a function GetDetails() which gets all info about task. This makes a database call. I override this in the derived class. For implementing this in derived class i see following 2 approaches. Approach 1. WorkOrderTask .GetDetails() { Calls base.GetDetails(); to get base details, populates in the object Gets details specific to WorkOrderTask, populates in the object returns; } Approach 2. WorkOrderTask .GetDetails() { Get details specific to WorkOrderTask as well as the base class details, populates in the object returns; } The problem with Approach 1 I have to make 2 database calls. Approach 2 If theres some change in base class I need to take care of these in all the derived classes as well. Whereas, Approach 1 is advantageous here as by modifying only the Task.GetDetails funciton ( this is the base class ) function i have all the values and i do not need to touch the derived classes. Was thinking this might be a very common problem, so perhaps many of might be able to guide me on the approach i must take here. Perhaps anything other then the two i have talked about. Thanks in advance Sourabh Tag: How to detect network connection Tag: 75579
  - 15
    - Visual Studio 2003 compatibility with original Visual Studio .Net My old laptop has the original version of Visual Studio .Net running on Windows 2000. My new laptop has Visual Studio .Net 2003 running on Windows XP. I imported an existing Web project to the new laptop, made some modifications, rebuilt the project, and pushed the changes, including the DLL and PDB files, to our "test and QA" server. The application blew up on the first screen; the error was something like "unable to find the query string collection object". I copied the changed .aspx and .aspx.vb files back to the old laptop, rebuilt the project, and again pushed all changes, including the DLL and PDB files, to the "test and QA" server. This time, no problem. What do I have to do so that our servers, including our client's production servers, can run applications developed with VS .Net 2003? Much obliged. Tag: How to detect network connection Tag: 75576
  - 16
    - Enumerating Static Arrays Hi I want to place a static string array in a server component. Will this pose any access conflicts, if multiple people are simultaneously using the foreach loop on this array. I wanted to use an array because the values are fixed and an array does not have the overhead of the collection objects Thanks Mark Tag: How to detect network connection Tag: 75575
  - 17
    - EndInvoke can only be called once for each asynchronous operation. Dear Si I had created two components one component calls another component Asynchronously The Problem is when i call EndInvoke Function, It will throw a error message saying that "EndInvoke can only be called once for each asynchronous operation" Please help me out in this regard Thanks Regards Umesha Y.K Tag: How to detect network connection Tag: 75561
  - 18
    - EndInvoke can only be called once for each asynchronous operation. Hi Tag: How to detect network connection Tag: 75560
  - 19
    - scheduling hi I'm planing to make scheduling app and need your advice on the best way to do that,and how to save the tasks to be executed and retrive their data at the right time. your input will be highly appreciated Majed Tag: How to detect network connection Tag: 75559
  - 20
    - Who can tell me how to monitor printer by C# Which class shall I use? Thanks! sunny Tag: How to detect network connection Tag: 75558
  - 21
    - .net zip equivalent of jar in Java Dear All, Is there a .net zip equivalent of jar in Java? I would like to compression my dlls while sending it across via No Touch...it should also take care of versioning... Thanks & Regards Jack Tag: How to detect network connection Tag: 75556
  - 22
    - LoadFrom and gzip Dear All, I have a stub program on my client...Can I use the gzip functionality along with No Touch? I am loading assemblies using assembly.LoadForm method...If I set the HTTPCompression to true in IIS...does it work with Assembly.LoadForm("http://localhost/Smart/bin/Startup.dll")...how do I test if http compression is working? Please help... TALIA Many Regards Jack Tag: How to detect network connection Tag: 75554
  - 23
    - Converting an XML documentation file to a help file Hi all, This may seem like an obvious question. How do I convert the XML documentation file that the C# compiler emits from my XML comments into a help file for the Microsoft Document Explorer? Is there a tool program or something that I am missing? I cannot find anything in any of the documentation. Regards, Chris Tag: How to detect network connection Tag: 75541
  - 24
    - Threading and raising events hello, I'm using C# and having a little thread communication problem : -one thread (and its associated object) receives UDP packets using the UdpClient class -another object (say Object2) needs to raise an event from another thread when a packet is received. -as Object2 *could* be sitting on the main thread, it cannot be blocked waiting on the "UdpThread" -Object2 is not a System.Window.Forms.Control -I'd rather avoid polling some synchronized variable. in the good old win32 times, i would have allocated a window handle in Object2's thread and used PostMessage from the UdpThread.=> no polling and no locking... Any advice on what should be done to remain in the .NET spirit while achieving such goals ? thanks in advance Sacha De Vos Tag: How to detect network connection Tag: 75538
  - 25
    - Responding to global keyboard shortcuts Hi! I have developed an app, which normally resides in the tray and does stuff in the background. I would like to make it possible to press a keyboard shortcut from anywhere in windows/applications and respond to that event. I have searched high and low on the web, but I guess I do not know excatly what to look for. :) Could someone please point me in the direction of an answer? :) - Klaus Jensen Tag: How to detect network connection Tag: 75537
- Next
  - 1
    - how to get the source file reference data from the clipboard in .Net Hello, I am familiar with obtaining source file reference material from the system clipboard using the old Win32 API. For example, copy an Excel chart onto the clipboard and goto Word. Under, Edit & PasteSpecial, there is a label called "Source:" which will contain the file path, etc. How can one obtain the source file reference material utilizing .Net technology? Thanks & Regards, TC Tag: How to detect network connection Tag: 75533
  - 2
    - HideEditBox in a DataGrid. Please Help. Hi All, Has anyone out there used HideEditBox, successfully? I am writing developing in VB .NET (VS .NET 2002) for the desktop. I have a datagrid which is ReadOnly. When you click in a cell, the text edit box appears which looks bad and distracts the user, AND it captures DoubleClick which I want to handle at the DataGrid level. I have set up a TableStyle and GridColumnStyles - all ReadOnly. I have created a new class for the columns, which inherits DataGridTextBoxColumn, and have called HideEditBox in the constructor. It does absolutely nothing. Here is the class: Public Class DataGridPassiveColumn Inherits DataGridTextBoxColumn Public Sub New() Me.HideEditBox() Me.Alignment = HorizontalAlignment.Right End Sub End Class ... I put the Alignment in there just to get some feedback so I know my class is working (I have to admit I'm new at this). The Alignment works, the HideEditBox does not. Can alybody help? I would appreciate it vey much. Randall Smallwood. Tag: How to detect network connection Tag: 75530
  - 3
    - FILE I/O How do you delete some data from a file? The file size should shrink. How do you insert data at a specific offset without overwriting? Something like this: xy xaabcy 01 012345 -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ Tag: How to detect network connection Tag: 75511
  - 4
    - Process.GetProcesses(remoteMachineName) Hi all, I want to get the list of active/running processes on some remote machines in the same LAN my application run. I always get a System.InvalidOperationExpection exception with the message of "Couldn't get process information from remote machine". I run my application under the administrator user account. Do you know where I am wrong? Tag: How to detect network connection Tag: 75510
  - 5
    - Client/Server I need to write an application (Server) that listen to a specific port, and receives and processes all requests that come from multiple machines (clients) at the same time. My question is; where can I start? Are there any examples that can help me? Thanks in advanc Tag: How to detect network connection Tag: 75507
  - 6
    - decimal.ToString behaviour I have come across a behaviour with the decimal.ToString method which i didn't expect, if i run the following console ap using System public class Ap public static void Main(string[] args decimal _decValue foreach(string _arg in args _decValue = decimal.Parse(_arg); Console.WriteLine(_decValue.ToString()) with the following arg 1 1.00 1.000 I will get output as follow 1 1.00 1.000 I would have expecte Can't see anything in the SDK explaining this. If anyone knows why this is so i would appreciate a pointer Thanks in advanc Pa Tag: How to detect network connection Tag: 75500
  - 7
    - TCPListener and Windows service Hi All I have a scenario The server can dial into the client for several task 1. To fetch several rows from 2 or 3 tables - I plan to zip the files and send it across the network; to increase performance, instead of row-by-row update on the serve 2. To execute a remote application on the client and fetch data returned by the client application to the serve 3. To transfer some files to the client which would be either stored on the client's hard disk, or execute an application and pass the file to the remote applicatio 4. To update sql data on the client databas My initial design was to make four TCPlistener exes listening to 4 ports and appropriately make the listeners to the appropriate jobs depending on the port that receives data Is it possible for me to have just one windows service to be running on the client, and depending on the parameter sent from the server, do one of the four options stated above Please advise Thanks Tag: How to detect network connection Tag: 75498
  - 8
    - Framework SDK version Can anyone tell me if the .NET Framework version 1.1 SDK will work with Visual Studio .NET 2002 (as opposed to 2003). Or at least tell me where I can find information on which versions of the SDK are compatible with which versions of Visual Studio. Thanks. Tag: How to detect network connection Tag: 75494
  - 9
    - Urgent: how to call a web service through a thirdly authenticated web page?? hi all, We've been facing a difficult task that we need some wise advices from other professional indeed. Our client want before calling the webservice from 1 webserver, for instance A, we must go through an authenticated web page on webserver B which requires to input user name, password, then if valid, that webpage auto redirect to our web service. More in detail: we need call http://A/WebService/WebService.asmx it jumps to http://B/authentication/authentication, a HTML page here for inputting user name, password. Then if OK, it redirect to our webservice. We've checked by IE already. So, the problem is how can we fulfill this task??? Any help would be very appreciated. Khanh Tag: How to detect network connection Tag: 75491
  - 10
    - PerformanceCounter & PerformanceCounterCategory on Windows 2003 We are trying to create a custom performance counter and category in .Net 1.1 with Windows 2003 and XP as our operating systems. We use the following code to do this if (PerformanceCounterCategory.Exists(categoryName) PerformanceCounterCategory.Delete(categoryName) CounterCreationData ccd = new CounterCreationData(counterName, counterHelp, PerformanceCounterType.RateOfCountsPerSecond32) CounterCreationDataCollection ccdc = new CounterCreationDataCollection() ccdc.Add(ccd) PerformanceCounterCategory perfCategory = PerformanceCounterCategory.Create(categoryName, categoryHelp, ccdc) OurLibrary.Error.AssertThrow(perfCategory.CounterExists(counterName), String.Format("Expected \"{0}\" counter to exist.", counterName)) PerformanceCounter counter = new PerformanceCounter(categoryName, counterName, false) We get a "Category does not exist" InvalidOperationException when we assert that the counter exists. perfCategory != null at this time. The PerformanceCounterCategory.Create does NOT throw. We have tried many permutations of calls to try to get this to work, but it always throws. The odd thing is that the category and counter are actually created in the perfmon utility. We can see them from .net too, but not in the process that created them. We have tried this same code on Windows 2000 boxes and it works correctly. What is the problem with the Windows 2003 and XP operating systems that cause this to fail? We have searched the newsgroups and have not seen any explanations and very few instances of this problem. Are we the only ones using the .net performance counters Thanks Frank Tag: How to detect network connection Tag: 75487
  - 11
    - Good sockets tutorial needed Can anyone give me some links to tutorials on using sockets with .NET? Here's my scenario: I'm writing a service in .NET. I want to be able to create clients which can talk to the service to both get status information from it and also make configuration changes. I figure a simple TCP connection would be the easiest way to facilitate communication. I'm no sockets guru in the first place or I'd try to muddle through it on my own (which of course I may have to). Any pointers would be appreciated, and any suggestions on a better way to set up program-program communication across different machines would be welcomed. Tag: How to detect network connection Tag: 75485
  - 12
    - HOWTO: Add help file to .Net IDE Gentlemen I've developed a library that a good number of programmers are using. I've also now created a Help file that explains this library Where could I find a white paper or article which would explain HOWTO add a third-party help such as mine so that it appears as a "Filtered by:" category within .Net Index, so that my programmers can reference this help right within .Net? Tag: How to detect network connection Tag: 75482
  - 13
    - IPC / Named pipes This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C43F4C.452B0C50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable This is from the Stream help... Where is the IPC Pipe? I cannot find = anything on this. Using sockets is TERRIBLE for this sort of thing. We = have an app that keeps running out of socket handles because they are in = the TIME_WAIT. Why doesn't the framework recycle those? FreeBSD and = other Unix's will force recycle TIME_WAIT's when the system gets under = load and runs out. This seems like a really easy way for someone to DOS = attack a windows box. FROM THE HELP: Stream is the abstract base class of all streams. A stream is an = abstraction of a sequence of bytes, such as a file, an input/output = device, an inter-process communication pipe, or a TCP/IP socket. The = Stream class and its derived classes provide a generic view of these = different types of input and output, isolating the programmer from the = specific details of the operating system and the underlying devices. ------=_NextPart_000_0020_01C43F4C.452B0C50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1400" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV> <P><FONT face=3DArial size=3D2>This is from the Stream help...  = Where is the=20 IPC Pipe?  I cannot find anything on this.  Using sockets is = TERRIBLE=20 for this sort of thing.  We have an app that keeps running out of = socket=20 handles because they are in the TIME_WAIT.  Why doesn't the = framework=20 recycle those?  FreeBSD and other Unix's will force recycle = TIME_WAIT's=20 when the system gets under load and runs out.  This seems like a = really=20 easy way for someone to DOS attack a windows box.</FONT></P> <P><FONT face=3DArial size=3D2>FROM THE HELP:</FONT></P> <P><FONT face=3DArial size=3D2>Stream is the abstract base class of all = streams. A=20 stream is an abstraction of a sequence of bytes, such as a file, an = input/output=20 device, an <FONT size=3D4><STRONG>inter-process communication=20 pipe,</STRONG></FONT> or a TCP/IP socket. The Stream class and its = derived=20 classes provide a generic view of these different types of input and = output,=20 isolating the programmer from the specific details of the operating = system and=20 the underlying devices.</FONT></P></DIV></BODY></HTML> ------=_NextPart_000_0020_01C43F4C.452B0C50-- Tag: How to detect network connection Tag: 75478
  - 14
    - Runs Slow The First Time I have an application that uses data access that runs slow the first time. My first page reads data from an ODBC source and the second page hits a MSDE database. After each page opens the first time, they run just fine. What should I do? I have all my code in ASPX pages right now, but I would like to break it up in some code behind. Also, is this the advantage in pre-compiling data access classes (like in a dll or is there an easier way)? Help appreciated. Thanks. Steve *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: How to detect network connection Tag: 75475
  - 15
    - passing values between web forms usign session variables any comments on this? I always use session variables to pass values among web forms. That is if I get a username, password in a Login form, then I pass these to the subsequent Search form as session variables. The search form needs to know who login to display the appropriate data.........is this the most efficient way of doing this? Tag: How to detect network connection Tag: 75474
  - 16
    - Mutex Differences VB.NET & C# Hi, I've got the following C# code that works perfectly to prevent a 2nd instance of my C# app: bool bAppNotRunning = false; Mutex MutApp = new Mutex(true, "MyC#AppMutex", out bAppNotRunning) if(bAppNotRunning == true) { Run the app and do work... MutApp.ReleaseMutex(); } I did the same thing in another app that's in VB. NET to prevent a 2nd instace of it: Dim bAppNotRunning As Boolean bAppNotRunning = False MutApp = New Mutex(True, "MyVBAppMutex", bAppNotRunning) If(bApNotRunning = True) Then Run the app and do work... MutApp.ReleaseMutex() End If Why doesn't the VB version work? bAppNotRunning comes back True from the Mutex constructor even when another instance of the app is already running?! What gives? Any ideas would be appreciated. TIA, -- John C. Bowman Software Engineer Thermo Electron Scientific Instruments Div. <Remove this before reply> john.bowman@thermo.com Tag: How to detect network connection Tag: 75466
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    - RSACryptoServiceProvider constructor very slow under Win XP I have a .NET app that uses the RSACryptoServiceProvider class to perform a key exchange with a server. During testing we've found that on some Windows XP machines, the call to the constructor for this class can take 15 or more seconds! On our Win 2K and Win 98 test machines it always takes less than 3 seconds. The problem's very easy to reproduce -- just create a console app with one line of code in it: RSACryptoServiceProvider p = new RSACryptoServiceProvider(); One most machines, this should run fairly quickly. On the afflicted machined, it's very slow. I know that the key generation goes on during the constructor, but 15 seconds...?!?! Also, as I said, this only affects SOME XP machines -- we have others that work just as the Win 2K boxes. To compare the XP machines that work fine to those that don't, we compared the advapi32.dll versions/dates, but they were identical. Has anyone else seen this issue or have any idea why XP would be so slow in generating running this constructor? Thanks for your help - Ken Tag: How to detect network connection Tag: 75465
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    - Class Modifiers via Reflection Is there a way to determine the access modifiers of a class type in an assembly via reflection? I see that I can determine if the class is public or non-public, but I would like to be able to further sub-divide the non-public modifiers (assembly, family, familyAndAssembly, familyOrAssembly, private). Is this possible with the .NET 1.1 Reflection API? And just to clarify, I see I can get this info for nested classes, but I would like it for non-nested classes too. Thanks for any suggestions or pointers on this. Kevin Tag: How to detect network connection Tag: 75464
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    - Config File for typefilterlevel change Can someone look at this post and tell me what can i do please.I have been waiting or 3 days now and still no answer. http://www.codeguru.com/forum/showthread.php?s=&postid=950198#post950198 Tag: How to detect network connection Tag: 75461
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    - Scan Resource Files Given a reference to an Assembly, is there any way to generically scan the assembly for embedded resource files ? And, given such a resource file, is there any way to loop through all the entries in that resource file without knowing what the keys are ? Any help gratefully appreciated. Tag: How to detect network connection Tag: 75459
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    - EventLog Category I have an application that writes events to the Windows Event Log. I created a log Source ID on the Application log. Everything seems to be working fine except that all the events have the event category of Network. I found the code for that by trial and error. I would like to add two new event categories to make the event records more intuitive. I've spent a day already trying to do this. Can you tell me how to add two new event categories to my log records. For example if I have a log source ID of "Gizmo" on the Application log, I would like to log events with new event categories of Exception and Trace Data. Can you tell me how to do this? Thanks for your help. Best Regards, Paul J. Lay Tag: How to detect network connection Tag: 75456
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    - how to change the font Dear all, How to change the font in the table grid? Please go to the above link to see the problem http://destiny.xfiles.to/ubbthreads/files/562767-1.jpg THank you Tag: How to detect network connection Tag: 75455
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    - Non-modal Status Form Hi -- I'm trying to write a modeless status form that other classes can call and display information to the user while they're working. The problem is that the controls aren't showing up correctly in the status form when I call frm.Show(). They'll appear correctly if I use frm.ShowDialog(), but I don't want a modal form. I'm sure I'm missing something really basic here. What am I doing wrong? TIA. Tag: How to detect network connection Tag: 75454
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    - Installation of Dotnet framework fails Hello All, I have same situation when I tried to install dotnet framework 1.1. The installation failed. My machine is a windows 2000 server , service pack 4 has been applied. The error message is: Error 1935.An error occured during the installation of assembly component {10BC3EDB-1888-4FD8-99E6-36851AB725oC}. HRESULT:-2147025891 Do any of of you encounter same problem? Any advice or help is vry much appreciated. Thank you Hai Tag: How to detect network connection Tag: 75452
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    - How to invoke a method using the thread which created the object Hello! In my program I've made an STA thread which is running separately from the main thread. The STA thread is instantiating some COM objects. Is it possible, from the main thread, to invoke the COM object using the thread which instantiated it? This situation compares quite much to the Invoke method of the Windows Forms Control class. Do some of you know how to achieve that? Best regards, Henrik Dahl Tag: How to detect network connection Tag: 75448

how can I detect the network connection? Can I use WMI(System.Management)? All i wish to do is to detect internetwork connection, like dial-up, or like what MSN Messenger is doing now. Whenever I connect to the internet using dial-up, MSN automatically detects the availablity of the internet(or just dial-up adapter only) and login for me. How can I do this thru .NET codes?

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