Has anyone know good webpage or book covering C# code in transformation of real time or sampled time data into FFT spectrum display (using GDI+). I like to learn FFT processing in abc way...can anyone point me good book or student course booklet. Thanks. ...more >>

Hi, I m beginner. i wanted to know how to get names of all the textboxes oded on the form object Based on that i would then flash the message to the user about the particular textbox been blank. and fill in the appropriate details. My guess is that this can be done with foreach(contro...more >>

Is it at all possible to monitor a port, and when there is a connection made to a remote server by some other 3rd party app, my app could report that the socket is connected, and can report the IP address that the port is connected to ? Websites: http://www.thelisters.co.uk/ http://www.my...more >>

Ok having another issue with binary reader. My file contains values 08 8A . When I read ReadBytes(2) what gets stored in the array is [0] = 8 and [1] = 138. How do I convert that to 2186 integer value? Thanks ...more >>

Hello All, Is it considered a best practice to always write a parameterless constructor for any object - just in case? I'm not sure. I want my object to have all it absolutely requires to function in the world at birth. Defining a parameterless constructor allows it to be created in an u...more >>

Hi, I cannot get the code below to work (C#). I'm trying to send a file to the recycling bin, and I keep getting the following error: "Cannot delete file: Cannot read from the source file or disk." Most tips i've found online talk about terminating the path with null chars, but I'm already ...more >>

Hi, Hope I've posted to the right groups. I'm trying create a Crystal Report for the first time using C# (novice at that as well). The CR I can handel. What I want to do is to have a whole bunch of fields in my application (winforms) which the user can select to include in the report or not...more >>

All: Is it possible to replace the delegate with a function pointer that will use the cdecl calling convention? Thanks. ...more >>

I'm working with a Window based application. I have a small form with just 1 label control which is set as Enabled and Visible. Its text is in black telling users to please wait while application is updating DB. However, the form pops up but the label.text is hot showing at all. What shou...more >>

I'd like to know when exactly the this. keyword is needed. For example: public class Combination { private long n = 0; private long k = 0; private long[] data = null; public Combination(long n, long k) { if (n < 0 || k < 0) // normally n >= k throw new Exception("N...more >>

i have the following public event ButtonPressedHandler InputButtonPressed; public delegate string ButtonPressedHandler(string Value); i am trying to capture that string how can i do this? i am basically trying to pass a variable from one form to another when OK button is pressed ...more >>

I have the following that works: public static void GetValueFromDbObject(object dbObjectValue, ref decimal destination) { destination = 2323; return; } This gives me an arithmetic overflow: public static void GetValueFromDbObject(object dbObjectValue, ref decimal des...more >>

Hi, I am creating a printing engine and I am cycling though my recordset. Each item gets added to an ArrayList. Once there are more items that will fit on the page I add the item ArrayList to a pages ArrayList. Seems pretty simple so far. However, when I clear the items ArrayList it clea...more >>

How can I tell if my C# code is running in debug mode? I need to execute some extra code only when my project has been compiled in debug mode. In release mode I don't want to execute this extra code. I was looking for something simple I could test like: #if DEBUG do_extra_code #e...more >>

I am looking for a call equivalent to: exit (111); What do i use in c#? Jim...more >>

Hi All, I was trying to apply databinding to a custom collection as in the MSDN Magazine article found in the August, 2005 issue. After converting the code in the article to C# and applying it to an existing set of classes, I tried using the collection as the datasource for a standard DataGr...more >>

streaming random filetypes from .aspx how to stream a file from inside a .aspx? e.g. so one could go href="./foo.aspx?file=bar.mp3" or href="./foo.aspx?foo.dat" etc. preferabley i would like all file types to open with "save as" when href clicked ...more >>

In my current work I noticed that I have several circumstances where I need to create little if/else constructs to handle the phrasing of a message. This typically involves a ternary situation like this example illustrates: 0 files were downloaded (or No files were downloaded) 1 file was ...more >>

Hi, I'm not working with anything web-related, all that I have is a datagrid, a dataset, and a datatable. I programatically sort whichever column when I need to. Now I'd like to be able to detect the order in which a column is sorted. I've been looking into ViewState, but I'm not having mu...more >>

I get the following error: Cannot implicitly convert type 'Factory.Stack.pArrayStack' to 'Factory.Stack.StackDefs.ImStack' at compile time. I thought perhaps there was a mismatch between the interface method types and the actual implementation types, so I removed all methods from both the in...more >>

Hi, The SqlParameter myPM =new SqlParameter("@Address", txtAddress.Text) is working for update, but SqlParameter myPM =new SqlParameter ("@Address",SqlDbType.NVarChar,90,txtAddress.Text) is not working. The Address column is DataType NVarChar 90, no problem. Any idea? Jason ...more >>

I have requirement, that i get one big chunk of text file. This text file will have has information, that on finding "****End of Information****", i have to split them individual text file with our naming standard (unique id) and create them designated folder. This requirement should be cre...more >>

I'm not entirely sure what the difference is between these two approaches. In order to avoid reentrant code, I was using Control.BeginInvoke in my UI to cause an asynchronous activity to be done on the UI's message loop. I began to get System.ExecutionEngineException errors so (on the theory ...more >>

I tried to do this: public static void GetValueFromDbObject(object dbObjectValue, ref decimal destination) { destination = dbObjectValue == DBNull.Value || "" ? decimal.MaxValue : (decimal)dbObjectValue; } Where I am just trying to say if dbObjectValue is either equal to a DB...more >>

I have the following code for a clock in my gui. Everything works fine EXCEPT the following line when the TimeZone is changed in the windows. string tz = TimeZone.CurrentTimeZone.StandardName; It will not pick the changed timezone but it does pick up time change due to timezone change....more >>

Hello, I have a problem while trying to add a folder to a project in C#. An exception NotImplementedException is thrown every time I call one of the function bellow. Here the code: DTE.Solution.Projects.Item(1).ProjectItems.AddFromDirectory (@"C:\Perl"); I get the same error with this fu...more >>

how can I reference frame objects to a .net object meaning how can I search for the frame and do things to that frame object...more >>

this code: private Array[] m_arrays = new Array[3]; results in an array of 3 null Array objects. What am I missing? ...more >>

Hi, I have something like this: try { // some code } catch // note - i am catching everything now { // do something } Will this sort of catch statement, catch 'unsafe' and 'kernal-level' exceptions (even if the app is a simple asp.net app with no unsafe stuf...more >>

Hi, I have a class with properties and each property has specific datatypes. Is it possible to extract the datatypes of each property found in a class? I would like to extract these datatypes so that I can build a dataset schema structure at runtime. Is this possible? public class ...more >>

How can I use C# to find the most recently modified file in a folder? As you can probably guess, I am just a beginner, so any help would be appreciated. Thanks! ...more >>

Hi all, I am making a program using the I.E. web browser control and need some (more) help. I need multiple windows open (multiple instances of the web browser) open at once on a page which requires the user to log on. As it is now I simple create the new forms and the webpage asks me t...more >>

Anybody knows if there's an already-made control which looks like Outlook's Calendar ? I mean that vertical control which has the hours at the left (9 Am, 10 Am, 11 Am). I've been told to work on a Scheduling System and have found none which makes me think the only way is to develop it mysel...more >>

I was wondering... Are there attributes you can use to mark accessors/variables that will identify them as to be shown when hovering over an instance of the containing object during debugging? As in, if you have a class with lots of different instance variables, but you are interested in se...more >>

hi ! i've recently begun developing in c# and i'd like to know what's the best way of calling a form from an already instanced form ? I have done a "Login" form which I run in the Main() using "Application.Run(...)", now when the user logins correctly, another form named "Calendar" must be c...more >>

I have an API, with a call back error definition. API receive reference to C# output message function (write to text box using Invoke since I use thread). Every thing is working fine API can write a message to my GUI textbox, but when I access the API from another THREAD , API try to call thi...more >>

Hello All, I seem to have found a problem using a ComboBox. If you bind a ComboBox to an ArrayList of classes, setting the DisplayMember to one field in the class and the ValueMember to another, and the ComboBox is sorted, then the bounded indices are incorrect. It appears that the Comb...more >>

I use asp.net to set mail to notify users to do something every Friday. There are 500 users of my programs. When I add 500 users in the BCC of a mail and send it with program, it fail. But if I add 10 users in the BCC, it will ok. What is the max users I can send at once by program? ...more >>

How to ensure that generic Collection accept only String as a typeparam? This causes an compiler error... public class StringCollection<T> : List<T> where T : String { } ...more >>

Hi all PRO, I don't know how to create the MSAccess database in the runtime with C#, Are there any body know how to do this? I am pretty sure that all of you know how to do it, except me :( . Thanks you so much in advance, I am deeply appreciated for your help. Take care and have a good o...more >>

Hi, What is the easiest way to retrieve the path from a console application? Right now I am using: - System.Reflection.Assembly.GetEntryAssembly().Location to extract the path and filename - path.getfullpath to split path and filename I am almost sure there is an easier way...!? Jan...more >>

If I have a class which wraps a class which implements IDisposable, should I implement IDisposable, too, in the wrapping class, and call the wrapped class Dispose() from the wrapping class Dispose()? E.g. Public Class Widget : IDisposable { private DisposableObject disposableObject; ...more >>

Is there a difference between Page.RegisterClientScriptBlock and Page.RegisterStartupScript? I've seen them both in code examples and they both seem to be doing the same thing. Any help would be really appreciated. Cheers, Mike *** Sent via Developersdex http://www.developersdex.c...more >>

Hi, I would write the following code in C#. set objHTTP = CreateObject("Msxml2.XMLHTTP") objHTTP.open "POST", "http://url.com", False objHTTP.setRequestHeader "Content-Type", "text/xml; charset=utf-8" objHTTP.setRequestHeader "SOAPAction", "urn:blabla#ListOfTitles" objHTTP.send fullStrin...more >>

Hi all, I have an app which is being no-touch-deplopyed. One of the library assemblies the exe uses makes a call to System.Reflection.Assembly.GetExecutingAssembly(). This works fine if you run the application normally, but when run using NetRun (a loader for no touch deployment application...more >>

Since System.Threading.Timer uses the threadpool to do its stuff what happens when (a) You try to create a timer and the thread pool is *exhausted* (b) The timer is due to fire AND all threads in the threadpool are blocked (deadlocked maybe)? As a followup qn to this.. (please excuse my i...more >>

Hi, I want to create a short-cut for a button (for example F2, F3..) without menu. Is there a direct way or I have to write key down event (with this I have to add this event for each control in the form)? Thanks. ...more >>

I have some unreasonable issue while reading access component from other thread. I have a Form class which includes TreeView, this tree view includes some TreeNodes , lets say 2 . In my Form class I define an arraylist which include reference to those TreeNodes. ArayList myTNodesPackage (...more >>

How do I scan through my Outlook Inbox programmatically looking for emails with a specific sender and subject, and then download any attachments from these emails? Any help would be really appreciated. Cheers, Mike *** Sent via Developersdex http://www.developersdex.com ***...more >>

hi all can some one tell me how to call dispose method of webresponse. I am currently using close method. But this is creating problem. So i want to use dispose method of webresponse. Can some one tell me how to do this. Any help will be appreciated. thanks in advance. ...more >>

Hi there, How to get my Network Workgroup Name with C#??? Hope you can help Best Regards ...more >>

Hi all, I have a asp scripts which runs a stored procedure which runs for about 30 seconds to generate a dataset. Somehow this page generates the time-out error. To find out what is wrong with page, I used SQL Profiler to monitor on when the request hits the database and discovered that it ta...more >>

.... is warning me not to use catch(Exception e) as too general. But how to determine what exception type should I use if try section may cause a few exception types? How to determine what kind of exceptions could such lines cause? XmlTextReader xTr = new XmlTextReader(pFileName); XmlSerializ...more >>

I want to create something like wizard, which will ask one question and proceed to the next question. So, it's like showing Form A (Question 1), then when the user press "Next" button, I want to close Form A (Question 1), and show Form B (Question 2). Sorry to ask if this is too simple, as I a...more >>

Greetings, I have text files that have: - one record per row. - no header. - no delimiters. Columns are know by the number of characters per field. For example: 3388br445bob smith 122332324 could be: UserID - 4 chars BlahID - 5 chars FirstName - whatever chars et...more >>

I want to XmlNode.ChildNodes reSort by any InnerText en....how? thanks very much!! ...more >>

I cratee a form to meet the fallowing requirement. 1. If any node is selected the corresponding checkbox should be checked 2. If any checkbox is clicked the corresponding node should be selected 1st requirement is working ,but, 2nd requirement is not wokring properly. when I click ...more >>