Hi, I don't know if this is the proper place to ask this. I'm looking for components from 3rd parties that has a nice and powerfull dbgrid component as well as combobox, etc. I just don't know which products are available. From my Delphi background, I just know about devexpress.com, ...more >>

Does anyone know how to get the underlying type of an Array type? Here's a bit of code demonstrating what I'm looking for... public Type getUnderlyingType( Type arrayType ) { if( !arrayType.IsArray ) throw exception //get the underlying type and return it } In Java you can ca...more >>

Hello, I want to change focus from one textbox to another next to an 'ENTER' keypress. But each time the user presses the ENTER key in a non multine textbox, the systems beeps. How to remove this beep ? Regards, Cybertof....more >>

I need some advice on this. I am working on a fairly complex calculator app (C#) with lots of functions (and these functions in turn use math functions from an unmanaged C DLL). A calculation takes a lot of time (up to hours), and should run on a separate thread from the one that the GUI uses. Th...more >>

The example at the end make me perplex... Looking at the msdn documentation, the inheritance tree that relates to "delegate" is as follow: Object<--Delegate<--MulticastDelegate. Unless I'm blind, there is no "+" operator as well for this class. To be able to combine delegates, I thought w...more >>

i just can't figure out why something im doing is not working correctly.... public interface IInterface { int someProperty { get; set; } } public abstract class II_interface : IInterface { private int m_someProperty; public int someProperty { get { return m_s...more >>

I have written an application that lives in the systray but when I try to close windows or logout it does not close my application and therefore prevents windows from shutting down or logging me out. It is essential that I solve this problem but I have run out of ideas can anyone help (please!) ...more >>

Hi, Can anyone explain the following behaviour? private static int BUFFER_SIZE = 1024; private byte [] Buffer = new byte[BUFFER_SIZE]; private Encoding ASCII = Encoding.ASCII; private System.Net.Sockets.Socket mySocket; // Already accepted a connection... int Length = mySocket.Receive(Buf...more >>

I know that this question has probably been asked before but I am not in the mood to search the forums I am already tired of doing that. I need an answer for my What are Microsoft corp. plans for C# . Will it replace C and C++? How about in respect to Java. I decided not to go java becauase t...more >>

Can anyone tell me how to get the numericupdown control to support themes? ...more >>

Please clarify My doubt.. 1) How to find out whether the component devekopment in Csharp is in Relase Mode or Run Mode? 2) Like Class Id in C++ , what the Unique Id for C-shap Component? ...more >>

I have a package built in C#.Net. I have the deployment package all set. However, I have a file that needs to be installed in the project but I don't want it be overwritten by an older version of the file if a user updates it before another user runs the install. i.e.. Customer 1 installs to ...more >>

Hello, Can someone explain me what is the differences between these 2 lines of code : MyArrayList2 = MyArrayList; MyArrayList2 = MyArrayList.Clone(); MyArrayList/MyArrayList2 are aray lists of class objects implementing the CompareTo() method, so the list is sortable. What happens ...more >>

Hi, got a quick question on al.exe i have an assembly say library.dll without any strong name i have a sn pair say org.snk how do i sign library.dll with org.snk using al? tx -T ...more >>

Ref: Win2000, .NET 1.1 Is it possible to set up a series of buttons, and when each is clicked it passes a parameter (MyButton.Text is fine) to a single event handler shared by all the buttons? 'ToolBar' is NOT an option. Thanks! ...more >>

is there a c# -> c++ code converter out there ? Hi people, I was just wondering if there is a C# to C++ converter out there. I have some working c# code and need to integrate it into a non-managed c++ program. The classes used are all user defined and use simple floats ints etc, so its just...more >>

It is known that one cannot pass arguments as ref or out in a marshal-by-reference class. My problem is that I have a C DLL (and C# wrapper) that I need to isolate in an AppDomain and then I need to interact with many objects in that DLL and wrapper by reference. (So the classes inherit from MBR...more >>

Hi there, I am trying to export a chart using the Excel11 object from C#. I can properly open workbooks and read cells, but calling Export() on the Chart object throws a COMException Exception: System.Runtime.InteropServices.COMException (0x800A03EC): Exception from HRESULT: 0x800A03EC. a...more >>

Hi! I need to get file information from a remote computer, the thing is, i need to use different credentials to get that information. My question is: how the add the credentials to my code, and with what objects this should be done. Thanks, Uzi ...more >>

How can I capture the events leading to my windows application crashing? would a big try catch around the Application.Run() do the job? in my head that launches a thread and if that thread crashes somehow my try catch wont do crap, maybe im wrong. So what do you guys do to capture a possible app...more >>

I just started working with C#. I have a combobox where upon selecting a product a grid is displayed in the form with a bunch of data. When selecting another product, I get an exception because the datagrid is not empty. How do I empty a Datagrid. Thanks, Imad. ...more >>

Hi All I'm wondering how to thread my control class. I've got a main GUI class that calls to the control class to perform all the work ( database, processing, printing, ect... ). What I'm looking to do is to thread that control class so that the GUI dosen't "freeze" when a intensive proces...more >>

If I have a class foo: public class foo { string baseString; public foo() { baseString = ""; } public foo(string s) { baseString = s; } public static bool operator==(foo lhs, foo rhs) { return lhs.baseString == rhs.baseString; } } And a derived class bar: ...more >>

Hi! I use OnMouseDown event to begin drag-n-drop in listbox but when I call to ListBox.DoDragDrop(params) OnDoubleClick event is not working. What I need to do to force OnDoubleClick work? Thanks. ...more >>

how do I format the number of sig digs in the left hand side of a number? for example I want 1 to be 0001 thnx ...more >>

I have created a class based on an XML file using the XSD.exe .Net utility program. The class has all of the XML elements as properties of the class. I am wanting create a way to loop through each property based on the string name. Basically, the xml file will be deserialized into the class obj...more >>

I posted this to framework.drawing, but did not get any responses... Maybe here?? I am drawing some text using DrawString() and using a bounding rectangle so that when the string is too long it wraps automatically. I want to decrease the amount of space between the lines. How would I go abou...more >>

I have a c# windows form that talks to a web service on a server that then can talk to multiple "agents" on different machines using web service calls. I want to be able to launch an application of the users choice on the remove, "agent" machine. I've discovered that Process.Start() won't ...more >>

Hi, How to use the fax service API through csharp? It it a object in .Net? Thanks... ...more >>

I am learning about attributes and at this point, I am completely confused. I have posted some code below. I do not understand the following points: 1) The TestAttribute does not appear for the StructureChanged field, i.e. the GetCustomAttributes() method does not return any attributes eve...more >>

1 I load a text file into a dataset, after doing a bit of work.. 2 Now I have a dataset full of data that I like to transfer to a data base 3 My problem is that if the rowstate of the row is set to unchange, nothing happen!! :( ; 4 Is it posible to load / change this parameter to read Added? 5 ...more >>

I'm playing with MS Visual Studio C# I have a Combo box that drops down to let me pick a quantity value. called milkQnty However, my understanding is that C# treats this as an object. I want to use this value to multiply with the price to get the total. double milkPrice, milkTotal; milkP...more >>

Using Visual C# I created two forms such as namespace test { public class SystemTray : System.Windows.Forms.Form { public createwindow() { stuff here; } public fadewindow() { stuff to fade here; } public displaystuffinwindow() { display stuff here; } } ...more >>

It doesn't seem to work. I get the error: System.NullReferenceException Object reference not set to an instance of an object. Here's the code: public ArrayList _rar; .... private void DoRAR(ArrayList array) { ... _rar.Add(array); ... } I tried ArrayList.AddRange() too...more >>

Hi, Can anyone suggest good resources on the net to learn "Regular Expressions". Regards, Srinivas ...more >>

How do I make sure that the user goes "back" to an expired webpage? Is there a way to trap the Back button and load a different page with the "page has expired" message? margaret *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for ...more >>

I have a struct but I have properties in that struct public and I want them to be visible in the designer for a user control so I have a property of SomeItem.Name, SomeItem.Value blah blah how can I retain that tree in the designer property window? ...more >>

Hi I did alot of research on this on the web and msdn and I couldn't find anything. I have a listview showing as a grid (table looking, with rows and columns and no images at all, only text). I get the information to display on the listview from the network and I add items often and stuff. ...more >>

Hi, Is it possible to change the background color of buttons in the tabcontrol? I have set a custom background color for all the tab pages in the tab control and I want the same color for tab buttons also. Thanks, Girish ...more >>

Hello everybody! Can anyone say me about writing NDIS drivers and USB hardware clients with C#? It's posible? -- WBR, Roman S. Golubin ICQ UIN 63253392 golubin@arhcity.ru ...more >>

I'm trying to locate a magazine that deals specifically with C#. Not a magazine that happens to have the odd C# article but a real C# Magazine with articles that deal only with C#...more >>

What advantages do I reap by following the EventArgs pattern in defining custom event delegates? For example... public delegate void CustomEventHandler(object sender, CustomEventArgs e); public class CustomEventArgs : System.EventArgs { int index = 0; public CustomEventArgs(int Index) { ...more >>

Like VS.NET's left bar... Thanks in advance... ...more >>

Hi there, Could someone help me over my lack of knowledge here? I am trying to find out why, when I use the same key pair, and the assembly version is constant, does the public key change with each Rebuild All in VS 2003? This sort of behavior will change the assembly strong name which is a B...more >>

Hi, I'm studying for a Microsoft exam. Can you tell me what will be returned if say I try to update a table in a database using something like: myCommand.ExecuteNonQuery(); and no rows are actually updated? Will it return zero? Thanks. ...more >>

Is there a good C# function to verify if a date is valid? Right now I am casting a date that is in string form (Convert.ToDateTime(dateString)) and catching an exception. This seems sort of lame. ??? ...more >>

Exit thread in C#CF. I'm createing a thread and setting a class object for when to exit. Before creating the thread i check if the thread is running, if so set the flag to exit the thread. What is the proper way of waiting for the thread to exit. In C++ i would set an event and WaitForMulti...more >>

Hi folks, I've got an unmanaged routine I'm pinvoking to. It takes a pointer to an array of 3 pointers to bytes, typed as byte**. [DllImport("foo.dll")] public static extern void foo(byte **p3pb); unsafe { byte[] pB = new byte[3]; pB[0] = // irrelevent in exa...more >>

Hello, Can Anybody tell me where can i possibly download the .net framework source code from ? -Josh... ...more >>

I have an MDI application that starts an instance of a child form at application start. I have an event handler on a combo box checking for the selected value to change. When the select value changes, I call a method on the parent form to change some menu options, and then I need to close the ...more >>

Hi! Is it possible to access fields in a derived class using reflection? Code below works fine when I access it as a private member in the Page class, but not when accessing base class member through an interface reference. I have tried to change the snd argement to SetAttribute method fr...more >>

I am drawing lines with a semi-transparent color (alpha=100). When these lines intercept, the color becomes more intense. Is there a way to avoid this, so that I would get the same intensity of color? Thanks a lot. ...more >>

Hey, I'm trying to access a function in my base class's base class. I want to skip one level in the hierarchy. class A { virtual void foo() { Console.WriteLine( "A::foo" ); } } class B : A { virtual void foo() { Console.WriteLine( "B::foo" ); } } class C : B { virtu...more >>

Hallo everybody! I have decided to start learning C# for several reasons. I don't have a background in C or C++ nor in Java. I spent 3 years programing websites using CFML and I was originaly inerested in Java although I never pushed seriosely at it. I would appreciate to hear as many proposal...more >>

Hi, Recently we had some code like this cause a failure: MyEnum myEnum = (MyEnum) (int) dt[row][field]; i.e. reading an int out of the database and casting it into a type-safe enum. The thought behind this construct was to enforce type safety and detect data corruption, which it only...more >>

Hi All, I got exception when call Activator.GetObject( ... ) When I start my application I register Channel to communicate between two computers and register type ReceiverLocator for remoting in Bind() Then when I need to get reference to this object on remote computer I call Lookup and g...more >>

Does anyone know how to print a single line to a printer in C# without generating a page advance? Thanks...more >>

Does anyone know any way of having a vertically aligned text box? Thanks...more >>

I need to send ".mht" files to different recipients. I have saved .mht files using CDO. Now i have to send it across.. I have two options both have different types of problems Using CDO I have no idea how to set an external SMTP server since my host machine will not have any SMTP virtu...more >>

HI, I need to create a form that shows a planner (with employees and working days ) where i can use a different colors for "busy" days and "available" days (i'll read the data from a Database). Is it an Excel sheet the only one way to create a Planner? Any other way? Thanks, Fabrizio ...more >>

Hello All, I have some questions about how the file upload process works in a web app. Background: The user is filling out a tech support request form. On the form is a file upload control so the user can attach a log file. On the server, when the form is submitted, the log file needs to be ...more >>