I was reading this interview with Hejlsberg, when suddenly the conversation turned to O/R mapping. Hejlsberg talked as if he had had to design an O/R mapping for .NET (he said ".NET had each one of those"--"those" representing, among others, O/R mapping). Probably I'm missing something real...more >>

Hey I need to assert from within a web page that an assembly was previously installed (and registered) on its hosting machine. I want to attempt to create an instance of that assembly inside a java or vb script method and decide according to the results whether it had been installed. The fol...more >>

Is there any way to have tri-state checkboxes in the TreeView, preferably without having to use the state icons for that purpose. Does anyone have or know of an implementation of tri-state checkboxes for the TreeView? Thanks, Aaron Queenan. ...more >>

Is there any way to know whether the OnItemCheck is being called in response to a user action (mouse or keyboard) as opposed to the form loading? I have a class which derives from System.Windows.Forms.ListView. Among other features, it enables the checkboxes and overrides the OnItemCheck() me...more >>

Dear all, I have a struct in C++: typedef struct{ char Command[4]; short a; }PACKET; I have to send by UDP and C++ command is: UDP->SendBuffer((char*)&Data,sizeof(PACKET),sizeof(PACKET)); where data is a PACKET Data=new PACKET; and I put something in that fields. What's the C...more >>

Hey, I'm working on an application (questionaire) with alot of different question types (very different form layout)... But the questions share attributes, however - since I'm working in the .NET Compact Framework that doesn't support Inheriting Forms, and a form is required to inherit System...more >>

I have found that EnumWindows works very quickly. In DotNet (I use C#), I can enumerate the windows, narrow them down to just the windows which are the main windows (i.e., windows which you can alt-tab to), identify the associated executables, group by executable, sort the executables alphabeti...more >>

I have ..... enum day {monday, tuesday, wednesday}; myArray[2,2]=5; i=(int)Enum.Parse(typeof(day), wednesday); Console.Writeline(i); Console.Writeline(myArray[2,2]); outputs: 2 5 as expected. If i try Console.Writeline(myArray[i,i]); i get index outside bo...more >>

Hi. I've not used C# yet but just ran across a premonition from 2 years ago saying that C# would render C++ obsolete by this time. Has it? Have most corporate developers migrated to C#? Is C++ used for new development or just legacy apps? What about non corporate developers? Microsof...more >>

Dears, I apologize in advance if this is the wrong place to post, sorry for the inconvenience. Is there any book or web site or any kind of resource is available for Windows hooking and subcalssing in C# / VB.Net (in general .Net)? OR, is there any link in Microsoft sites / MSDN ? OR i...more >>

I try to transform xml that has default namespac For example <Root xmlns="http://BlaBla.Com"><SomeContent></SomeContent></Root Then if I use the following xslt Iâ?Tm getting no results because it expecting the namespace <xsl:template match="/"><xsl:value-of select="// SomeContent" /></xsl:tem...more >>

Hi, I am trying out creating an addin in c#. I am stuck creating a customised option page for some of the properties.Can anybody please help me with solving this problem? Any example regarding this would be extremely helpful. Thanks in Advance, Amarnath ...more >>

C# Assemblies question. I have a project that writes out objects as an XML document in a specific manner that my bosses want to use. I call this project XMLObjectIO . this project is compiled to an DLL and referenced in the main work project. Writing and reading primitive types goes off wi...more >>

Hi Experts, from my program I offer the user to launch different files from a directory (normaly in this directory are .txt files) - but sometimes other files may be in there - so if my program receives the "no program associated" I would like to launch the standard Windows dialogue that pops ...more >>

What's the "standard" way of replacing a character in a string? Obviously, I can't say "myString[index] = character;" because strings are immutable... So what would be the "standard" way of doing this? TIA...more >>

Hello, If I am binding a ComboBox to a dataTable, I can set the DisplayMember and the ValueMember property. If I am loading the data manually, how do I load a value which is equivilant to the "ValueMember"? Thanks in advance for your assistance!!!!!!...more >>

Could you guys please help me of this? http://www22.brinkster.com/crazyut/ Here's the assignment I've recieved but I can't make it done on time(4 days from now) because I've some serious thing to do. It would be grateful for me if you could that. I know it's very shame but I got no choice. Please ...more >>

Following texts are from C# spec. The optional constructor-initializer specifies another instance constructor to invoke before executing the statements given in the constructor-body of this instance constructor. This is described further in Section 10.10.1. So this means: public class ...more >>

What's up with the server lag? I've sent a few messages today and each hasn't "shown up" for at least 15 minutes after me sending it. The last one I sent (over 30 minutes ago) still hasn't shown up. Is it just me or is someone else experiencing this too?...more >>

Hi, I am attempting to write a C# photographic gallery. I wish to create a standard application that will cycle through all images placed inside a folder that is relative to the executable. The reason for this is so that I can simply add/remove photographs from the directory without having t...more >>

if the web services has a run-time error, how can i send a custom soap error message, like embed the error stack trace: try { ....... ....... } catch(Exception ex) { // format the custom soap error message msg = formatSOAPMsg(ex.ToString()); // send the soap error m...more >>

After a thread has executed and finished, when I try to call its Start() method again, it throws an exception. Is it necessary create a new Thread instance every time? Can't I just re-use the same one? <relevant parts of the code> private Thread thread; public WinForm() { thread = ...more >>

hi , I have a System tray application which configures a Windows Service through it (Both written in C#). I have the service polling to a database table every 30 seconds , the time interval is hard coded into the Service code . What I need is to configure the time interval thru the SystemTray ...more >>

how to get from byte[] to string? i can't remember method to use, Encoding method i think? TIA Sam ...more >>

I'm using a third-party tool that takes a DataTable as a parameter. I really need to pass it a DataView instead. When I try to explicitly cast the DataView as a DataTable I get an error that they aren't compatible data types. Does anyone have a suggestion on how to do this? My last resort is t...more >>

Hi All, I am new to C#, and am having trouble passing the value of a variable from one windows form to another. Can anyone point me in the right direction. Any help here would be greatly appreciated. Thanks David ...more >>

I am using above script for Focus to txtAdi which is textbox in c# web application.But it doesnt work. Have you any idea why it doesnt work thanks....... char c=(char)34; string script = "<script language=" + c + "javascript" + c + ">" + " var control = document.getElementB...more >>

I have a problem with divide operation, the example is: double a =10.0; double b =220.0; double divAns = a/b; the calculation true result is 0.04545454545454545 but for some resone the calculation is changing to get the result 0.0454545468091 if you know how can i get the system to calc the ...more >>

The service is installed, started etc, but no tick events are received. Is this expected? Should I be using an alternative technique for regular data processing? Mr B ...more >>

chr(34)= ? in c# how can I use it? What is the 34 number ? thanks ...more >>

Hi! Does anybody know how to display no tooltips on objects in Crystal report? Dmitry ...more >>

Hello, I have a hash table... some results from it I like to see in a windows form. Which component must I use? Users may select one item in the "list" (from the hash table)... How can I see which item the user haves selected? Thanks! Arjen ...more >>

How can I focus the user to textbox. Thank you...... ...more >>

Hello everyone I have written a Windows Service to monitor local and remote Processes/Applications. However I am stuck because if it is installed as a user account I cannot get it to interact with the desktop and therefore get the System.Diagnostics.Process.Responding of an app. But if I set i...more >>

Hi, I'm about to start on an an application that will need to use SFTP. I know *nothing* about SFTP (or ftp for that matter) besides the absolute basics. Where should I start? Are there readily available components for this? Is there anything I shold look out for? regards, Marco ...more >>

Whenever I try to start my service application, the config file is erased and I get an application exception trying to read it. When I make it read only, everything is fine. Anyone know why this erasing happens in the bin\debug directory? Thanks. Adam Smith...more >>

hello all, can someone please tell me how can i convert a .doc file to a .pdf using c#? or please let me know if you know any articles that shows you how can it be done? many thanks, benny *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...g...more >>

I have an application that I am releasing a beta version of. My question is regarding should I release the debug version or the release? I guess I am confused about the differences. Also, how VS.Net controls versions: 1) On release how does the version change? 2) Does it automatically incre...more >>

if i have a string eg string day="monday"; and an enumerator enum days {monday=0,tuesday, wednesday} how can i use the enumerator so that instead of writing days.monday to return 0 i can use the value of the string day as the enum literal eg. something like: days."...more >>

Hi All I came across this piece of code in C# and was wondering what exactly does it mean to the event Friend WithEvents txtPath As System.Windows.Forms.TextBo The Friend Withevents part Thanks JJ...more >>

does anyone know if it is possible to put spaces and apostrophes in enumerator literals? ...more >>

Hi All, I have created a datalist using the repeatcolumns property to create multiple columns. I have tried to keep everythings width to 100% so that if the window is resized it still looks alright. However with these repeating columns it throws everything out of align because it lets you scro...more >>

I want to center-align the text in 2 Label controls, and I want the 1st char of their text to line up ------------------------------------------------------------------------------ label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter label2.TextAlign = System.Drawing.ContentAlignment.M...more >>

I have been searching and can not seem to find a good example of a working UDP client that listens, but does not block while waiting for data arrival. I am trying to write a client application that needs to listen on several TCP ports and one UDP port. It will send a start signal over UDP an...more >>

<code> public class MainClass { private ArrayList list; public Class() { list = new ArrayList(); AddToList(); ReadFromList(); } private void AddToList() { list.Add(new RecordClass("test1")); list.Add(new RecordClass("test2")); list.Add(new RecordClass("test3...more >>

Whats wrong with this code? public void CleanData(DataSet DS) { switch (DS.Tables[0].TableName.ToString()) { case "scs_ds_vehicle_inventory" : case "scs_ds_sold_customer" : case "scs_ds_employee" : case "scs_ds_fi_deals" : case "scs_ds_ro_customer" : case "scs_ds_ro_h...more >>

Hello: We are considering developing a time critical system in C#. Our tool used in Semiconductor production and we need to be able to take meaurements at precise 10.0 ms intervals( 1000 measurement exactly 10 ms apart. In the future this may decrease to 5ms ). I am concerned that if garbage ...more >>

Here is what I am trying to do. I have written a working program in VB6 that monitors any number of printers simultaneously(sort of). Because VB6 doesn't support multithreading I have to do this with a timers and loops which eats up CPU power and has other inefficiencies. I am slowly converting i...more >>

I'm new to the .NET community. My name is BJ and I've been developing web applications for years now. I'm very new to .NET and could use some assistance. I don't think I'm asking for very much here. This should be very common but I haven't been able to find any concrete examples. I'm creati...more >>

In the following... byte[] ReturnByteArray(int size) { byte[] result = new byte[size]; for (int i = 0; i < size; ++i) { result[i] = (byte)0; } return result; } ....what is being returned - a reference or a value? TIA...more >>

Hi, This is one which I've seen several times on the web but no-ones ever come up with a definite answer or response: When sending HTTP requests through HTTPWebRequest it always includes the header: Expect: 100-continue Is there any way I can restrict this from happening? Thanks, Dave...more >>

hi, I have two image buttons for a custom paging solution in a DataGrid, I would like both button's to use the same Click Event. I have seen this done before but can not remember were, would some please give brief explanation of how? Thanks Ron...more >>

1. I'm trying to convert a C++ program to C#. In C++, our code uses several CRecordset derived classes (These classes are representative of our SQL server tables). These classes are instantiated and used in many places in our C++ code. What is the easiest way to represent C++ Recordsets in...more >>

I have to sort the contents of each column, by default you can sort the column just on clicking on the column head. That works by default. I have to sort another column by the contents of the next column, I have already written the sorting functions, the are trivial. The problem is by no...more >>

Hi, Do memory sticks have serial numbers like harddrives? If so how can I get this, I want to uniquely identify a memory stick (removable drive) for authentication. Thanks ...more >>

Here is my problem. I'm creating an Instrumentation class that will use previously created Performance Categories and Counters in order to time various processes (ie. query duration etc.). This Instrumentation class will be used by a variety of "services", so the Categories and Counters to be ...more >>

Hi, My code reads through a file of shapes adding each one to an ArrayList as it does so. The problem is that for files with large numbers of shapes, calling ArrayList.Add(MyShape) is exceptionally slow. There is no way of knowing how many shapes need to be read in so I can't set the...more >>

Back in the old Visual C++ days, it was always important to define constant strings only once so that they wouldn't be stored over and over again in memory. Has .NET resolved this issue? Consider these two code snippets: Example A ======== const String hey="hey"; MessageBox.Show(hey); Messa...more >>

I am wondering if there are any seasoned software people in here who can point me to some resources on how to price a beta product. I have developed a C# app that will sell for around 30K but I am not sure how to sell the beta. Is there a standard industry scale for percentages? Thanks ...more >>

MS or anyone still claims that C# and VB.NET generate the exact same IL code? http://www.osnews.com/story.php?news_id=5602&page=3 ...more >>

Hello, I have a VS 2003 application that gets the following error window: "An unhandled exception of type 'System.ArgumentNullException' occurred in mscorlib.dll" "Additional information: Value cannot be null." When I click the break button it says, "There is no source code available for t...more >>

I need to copy a directory to another locaiton. Is there some .Net framework method I cannot find for copying a directory from 1 location to another? I found the File.Copy(), but there does not seem to be a Directory counterpart. Or do I have to code my own recrusion routine to do this? TIA, ...more >>

I need to determine if a file's last write time is greater than 15 minutes. Is there a simple way to do this with the TimeSpan object? Thanks! *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

I want to know the decimal separator and the group separator character that the user has set in Regional Settings in Control Panel. I tryied to use System.Globalization.NumberFormatInfo.CurrentInfo like that: NumberFormatInfo numInfo = System.Globalization.NumberFormatInfo.CurrentInfo; str...more >>

Say for example a user of my website makes a selection on the site and I want to store that value for use on a later page what is the best way to do that? My only method at the moment that I know would be to create a static class and static variables inside of that. But if more then one person was ...more >>

Nicholas, Where do we find an example that does a EXE COm server in .net? John, Message 3 in thread From: Nicholas Paldino [.NET/C# MVP] (nicholas.paldino@exisconsulting.com) Subject: Re: EXE COM Server Possible in C#? View this article only Newsgroups: microsoft.public.do...more >>

My client-server system, is begining (when more client are connected) sometimes to throw an exception like this: Collection was modified; enumeration operation may not execute. foreach (tcClient per in tcClientList) <-- Exception throw by this line. { if (tcClient!=tcClientNow) tcClient.f...more >>

How do I programatically determine the enabled or disabled status of AD accounts? I have queried the userAccountControl key, but all I get back is an int, and it seems to be the same for enabled or disabled accounts. Please help. I have read the following article: http://msdn.microsof...more >>

I have an application installed on a web server. When forst intalled it worked fine. The administrator rebooted the server and then when accessing the app the folowing error appears: CryptoAPI cryptographic service provider (CSP) for this implementation could not be acquired. I am using ...more >>

Hi All, I am trying to call COM Component in .NET using PInvoke. In the following scenario, ( I am getting an exception called SEH - External component has thrown an exception) UnManaged Code --------------- virtual HRESULT IDispatch::GetIDSOfNames(const IID & riid, LPWSTR * rgizNa...more >>

I'm currently trying to create an application with a very small window, 32 by 32 pixels to be exact. However, I can't seem to make windows smaller than 112 by 27 pixels, even though I make them borderless. Does anyone know why this is the case If it is not possible to make the window smaller, does...more >>

Can anyone explain to me a meningfull use of the "new" keyword (Shadows in VB). I think i understand how it works fully but i cant figure out why you would use it. Why would you want to declare a variable in a derived class with the same name as in the base class but with a diffrent meaning? ...more >>

Hi All, I am trying to call COM Component in .NET using PInvoke. I have rewritten custom IDL file in a managed language(C#). When I try to invoke one of the COM method from .NET, I am getting the following exception. System.Runtime.InteropServices.SEHException: External component has thr...more >>

Hi, I have a Text Box wich include an URL ,user enter a link address . my application should open this link to save in the disk. how can I do that to get a link and save the page in the disk ???...more >>

I am currently enumerating windows via the EnumWindows API. I noticed that for some reason the very first time I call my enumwindows routine (inside or outside of a thread) it seems to be very slow. But subsequent times in the same running instance the calls are super quick. What might caus...more >>

Hi to all, I would like to know how .net manage the objects and what are the cicle of life of the objects... Are the same this cicle, for the objects created in windows applications and for the web applications? Any help will be grateful Thank Owatona ...more >>

Hi, I Want to open a form that a user specify in a textbox... Thereis any way to open a form having justt only is name? Ex: txtForm.Text = "frmSomething" Form oform= new (Form)txtForm.Text.ToString(); oform.open(); ...more >>

I have a routine that enumerates all controls in a windows form. I what to enumerate also the controls that are inside a GroupBox or Panel,... There is any way to know what is the type of the control being enumerated? ex: if (typeOf ctl is Panel) //Get all controls from this parent ...more >>

How can i add values to a string array? string[] arr = {"a","b","c"}; string s = "X"; I'd like to add x to the front of the array so the array would look like this. {"X","a","b","c"}; I tried arr[] +=s; but it didnt work what did i do wrong? ...more >>

Hi All What are the options in .NET (C#) for creating applications that can both run within a browser and on the desktop in traditional mode? Previously (VB6) user controls have been created to be embedded within the browser and forms (ugh). I know I'm being lazy and should search more but hope...more >>

Hello, I'm currently writing an application in C# to support message integrity checks with signatures. For this, I need to use X.509-Certificates from files (CER encoded) as well as from the windows local machine certificate store. I modified the CryptoAPI P/Invoke-Examples from MSDN (http...more >>

Why is there a filesystemwatcher but not, say a processwatcher? I need an event to fire whenever a new process has been created. Obviously the taskbar is receiving such an event. Anyone know how to do this in c#? Or if it can be done? I find it odd that I can wait for a task to terminate a...more >>