Hi: How can I control the thread? For example run a function in 3 thread or run a program in more then 1 thread?? if the speed of the program will running faster when the program is run under multi thread ? Or what's the different between a program running under multi thread and a program runni...more >>

Hi, I want to scale an image in the background of a visual c# form. There isn't an option in the parameter list and I wondered if there is a straightforward way of doing it? Thanks ...more >>

Hi: I had asked how to use delegate in the programming. And now actually I want to know why and when the function need to run by the delegate? ...more >>

Hi all How can I programming with msmq? What's the msmq use for? Please show some example code on the reply . Thank you. ...more >>

How can I make a Toolbox form always stay focused without making it a topmost form? ...more >>

Hello, I have a simple c# app. At first launch, It takes 30Mb once launched. If i minimize it, it only takes 1380 Kb If i maximize it back, it stays near to 2600 Kb, and never goes back to 30Mb. How do you explain this ? ...more >>

(Type your message here) 1 - How do I programmatically assign a value to a specified cell in a DataGrid? Something like DataGrid1(3,8) = "ABC" 2 - When I am going to the last row (the empty one)in order to insert a new record into the DB, I want the default values of the fields that do have defa...more >>

(Type your message here) hi. i am doing a small application project in c#. can any one help me how to find the directory of the current running program. how to create the input box in c# program. -------------------------------- From: sathya moorthy ----------------------- Posted by a use...more >>

I have a form that uses a transparent color. When I change the opacity of the form the transparent color becomes visible....I've tried redeclaring the transparent color and doing a couple other things but I can't get it to be invisible again. I don't remember having problems with this in the...more >>

I have a simple winform Data Grid with a XML source file. The heirarcy is 1 level deep. While I have expand selected, I still have to click on the hyperlinks to get the grid to show its data. What I would really like is to have it just plain come up as if I was getting the data from a databse ( not...more >>

Hi, I wrote an assembly in c# and i need to use it in my vc++ project so i build a tlb from it using regasm.exe and import it in my project i also put the dll under the directory of my exe file but it failes when i try to all the createinstance function why??? It work fine in my xp computer whe...more >>

I am working in C# .NET If I want to invoke LabelEdit event of TreeView/ListView(property set to true) from another event what should I do? I was advised to send a LVM_EDITLABEL / TVM_EDITLABEL message to the control. But how to get the integer number for LVM_EDITLABEL / TVM_EDITLEVEL ? Or ...more >>

hi all. why value types which are stored in the stack, give better performance, than reference types which are stored in the heap? are not both stored in the ram? thanks. ...more >>

w32/sdbot.worm do not download or open ...more >>

There seems to be various methods to determine when the remote client disconnects, but all of them I have seen are Synchronous. AKA: Right before you try to send or receive data, check. Is there no way to do raise an event for this? That way you know as soon as the client disconnects? There ...more >>

Hi. I have a really simple set of classes that writes 2 pathnames to a xml file. I can write the default ok. Then if I change 1 pathname to a shorter one, then rewrite the xml file, the remains of the old pathname, and closing tags are left on the end resulting in an invalid XML file. Xm...more >>

Hi friends, I am a Delphi Programmer I want change my technical skill with C#. What is your recommended book? I think Wrox Professional C# is good. Any idea? ...more >>

I want to use C# for 3D tool development to take advantage of its superior gui library. I have tried out some stuff in managed dx, but still I do not want to be writing the same code twice in different languages. (I.e., I don't want to write a particle system editor in C# and MDX, only to rewri...more >>

I have a form that needs to take input from another form. Problem is I can't see any way to pause the sequence in the main form to wait for input from the second form. prompt = new AddressPrompt(); prompt.Show(); // Wait for click event in prompt if (prompt.okay) a...more >>

I'd like to know how one shares an int variable across different ocjects (of different classes) without pointers. public class ClassA { public int n; public ClassA(int N) { n = ??? n++; } } public class ClassB { public int n = 0; public ClassA = new ClassA(n); } If I inc...more >>

I'm having a lot of difficulty getting even the simplest callback function (void return, no arguments) to work, from a dll to C#. When the callback is invoked from the dll, I get a fatal error, that shuts down the app. I suspect that the function pointer is passed incorrectly. I've studied ...more >>

The thread on 'why NOT to use interface?' has provoked a question - but I'll start a new thread.... Is there any performance difference that anyone is aware of between using interfaces for polymorphism instead of inheritance? I'm aware of the OOP design plusses and minuses of each approach, b...more >>

stupid question time again to most of you experts but this is something that continually bothers me. I am trying to get into the habit of naming variables and controls in an assembly as per convensions. The thing is that Ive never really get the full reference to check against. Ive seen a coupl...more >>

I think a Font.Parse would come in handy right about now. There is a ToString() meathod but is there some kind of parsing for that, or would I have to do it manually :(. Is there something else I can use to turn a Font into a string then back again? thanks...more >>

I need your help! I want to declare and shift left a buffer that bigger then any basic data type that C/C++ supports And I'm doing so: --------------------------------------------------------------------------- unsigned char arr[32]; for (int i=0; i<31; i++) { code = arr[i+1] &...more >>

in java you can create your own url stream handler and make it handle any url you want (like myurl://someurl), is there such a thing on .net? ...more >>

Is there a simple way to check the status of an item as checked or unchecked in a CheckedListBox? I need to cycle through a CheckedListBox and take one of two actions for each item, depending on whether the item is checked or unchecked. So the CheckedItems property doesn't really help me. I ex...more >>

Hi, When i popualte my datagrid the columns are all squashed together and = not applying their set width.. my code is as follows.. first i do this.. DataGridTableStyle TSCA =3D new DataGridTableStyle() ; TSCA.MappingName =3D "tbl" ; DataGridColumnStyle TCCode =3D new DataGr...more >>

Hello, I have a Widnows Service that creates a system event that I would like to have a Sql Server stored procedure fire when the stored procedure is called. I have a Windows Service that runs on my database server that will wait for this event before it will execute (via the Win32.CreateEve...more >>

Hi, I've looked but find what I'm looking for. I'm trying to resize a ListBox to the smallest size but still have all the items showing. kinda like a ContextMenu. I've looked and even tried figuring it out manually, but haven't had a success. Thanks...more >>

Hello Given an array of binary data stored in an ArrayList container, do you associate the container as a datasource in a Data Grid control private ArrayList xList = new ArrayList() // Arbitrarily add 64 integers into containe for (int i = 0; i < 64; ++i this.xList.Add(i) // Assuming Data...more >>

Not sure where to post this Q I am trying to write a Managed Exchange Server Event Sink (as a class library) in C# I have been following this tutorial step-by-step http://www.codeproject.com/csharp/CsManagedEventSinksHooks.as So far so good....except when it comes down to binding the compone...more >>

I need badly establish TLS communication over TCP. How to do it? Thanks ME ...more >>

hi i am looking at a colleagues code and i fail to understand what these mean. public event DataListItemEventHandler ItemSelect { add { this.Events.AddHandler(EventItemSelect, value); } remove { this.Events.RemoveHandler(EventItemSelect, value); } } ...more >>

Trying to get the user password expire date from AD, but there is no such field. What I could get is the PasswordLastChanged property. Is there anyway I could calculate the date or something? Regards, Bryan ...more >>

As in subject. Thanks MH ...more >>

Hi Has anyone got some sample code in C# for a program that basically manages an employees atttendance i.e. the time employee came in and left and when he took breaks and lunch. Thanks...more >>

I've done a lil reading about the performance counter MMC snapin and how it operates. But I'm really interested in tracking the number of instances of particular objects so i can see what objects would be good canidates for pooling. Could anyone point me to a good resource (google didn't help)...more >>

Hello How can i make help files for program in C# in .net ? Thanx Michal ...more >>

All, I was just reading over a new MSDN Magazine article by Juval Lowy on the new features in C# 2.0 (its a wonderful article, see link below.) In the section titled "Anonymous Method Example" he makes reference to an aspect of .NET 2.0 that may have a significant impact on many of your ...more >>

Hi, back in the COM days, i could write something like this, in IDL: [id(1), helpstring("My Foo function")] HRESULT Foo(); and later in (e.g.) VBs object browser, my description would apper when i see the details for Foo. How can i do that in C#? [Description("My Foo function")] pu...more >>

I want to use the EndEdit function, so I need a DataGridColumnStyle object. But I get a 'index out of range' exception when running the line bellow: DataGridColumnStyle dgc = dgShowStock.TableStyles[0].GridColumnStyles[0]; I don't understand what I'm doing wrong. I tried other values then 0...more >>

I have a C# application that I would like to notify the user of events with sound. Is there a way to playback at least the standard sounds? ---------- Will Pittenger E-Mail: mailto:will.pittenger@verizon.net All mail filtered by Qurb (www.qurb.com) ...more >>

Hi. I would need an advice here please. I have to define a set of constant key/value pairs for my C# .NET DLL component. We are talking about at least 5000 pairs (where each key is a System.String and the corresponding value preferably is a System.Byte [0x4] ) These pairs will only have...more >>

Hi all I have a class Parent, and two child classes class Child1 and class Child2 derived from Parent class. In Parent class there is a method that will instantiate child classes based on the input parameters it received. I am able to instantiate my child class from the Parent class, b...more >>

Hi,i'm trying to read udp packets sent by satellite. It's a porting of a delphi program i did some year ago but , as i'm learning c#, i'd like to do it. I have the ip address of the sat card(238.238.200.200), ip address an port where data are coming from( 139.139.139.139:9000). Using socket cla...more >>

I have an application. When a user minimizes it it hides itselfs but stays activate in the system tray. Since it is hidden the user may think that they have exited the application and now may attempt to create a new instance by launching the program again. The problem that I am running into is be...more >>

Hello I finally managed to save Bitmap that reprezented my pictureBox to jpg file, but now how can i load from that file to Bitmap again ? Bitmap does not have any Load or Open method (like Save...). Thanx Michal ...more >>

Is it possible to use GetThumbnailImage with images being pulled from an SQL DB and if so how? All examples I've seen refer to working with an actual image stored on the server. My code for pulling the image from the DB is below if it makes a difference. Thanks in advance private void Pag...more >>

Hi I'm writing the interop functions for functions in a C dll. All these functions return INT (32 signed). However, the return value is to be interpreted as a bool (false=0, true!=0). Can I do the following without problems [DllImport("UsedLib.dll", EntryPoint="UsedFn") [return : MarshalA...more >>

Hi people I am wrapping a C dll using PInvoke from C#. I need to wrap the following signature in C int dma_start( const UCHAR* data, UINT data_length ) The function should start with a DMA operation, and I have to use it from my C# program. I am really unsure what type of marshalling I shou...more >>

Hi, I've got some forms with loads of controls for entering numbers. Each text box should behave in a similare way but i hated writing all the text processing code for every text box. So I made a function that took the object whose property was being set, the name of the property and the text...more >>

Hi, I am very new to C#. I have a c# application which is using lot of .NET namespaces . I want to run it on a machine which has Just OS installed on it say 2k.(No other libraries/tools) What all libraries do i need to bundle with my application to make sure my app works without any problems? ...more >>

I have a simple Combo box on my Form, Data in it is Coming from database, Data is stored in database Through a form where i am using Textbox to enter data The Source data to combobox contains carriagereturn,linefeed ('\n\r') , Since the Combo box can not display carriage return it displays it as s...more >>

How to convert back a string that have converted to byte[] using System.Text.Encoding.UTF8.GetBytes() string StringData = "This is a string"; byte[] ConvertedString = System.Text.Encoding.UTF8.GetBytes(StringData); Now, how can I convert ConvertedString to "This is a string" string again?...more >>

Hello, How can I build the DLL with .def file? I've just build the DLL with following cl.exe options to build, it's worked. But I can't use the DLL in my C# project cause it need to be built with .def file. cl.exe -nologo -LD -W3 -O2 -GF mydll.c So, can you tell me how to build the libr...more >>