Hello: Using WinForms, certain users may change the value in a combobox, others may not. Some of these boxes open with a default value. I need to check the user's rights before committing his or her changes in the box and restore the previous value if he or she is not allowed (or not l...more >>

hi, in a c# app i dynamically loaded a com type library: AssemblyBuilder ab = tlc.ConvertTypeLibToAssembly(typeLib, "temp.dll", 0, ceh, null, null, null, null); while loading .net raises an event becauce it found a external reference. this is my event handler: (it's in a class derived fr...more >>

I have the following code; string test1 = words[2];//"Exclud" string test2 ="Exclud"; string test3 = String.Copy(words[2]);//"Exclud" bool booTest1 = test1.Equals(test2);//false bool booTest2 = test2.Equals("Exclud");//true bool booTest3 = test1.Equals("Exclud");//false bool booTest4 = ...more >>

I'm using VS2005 Beta 2 (C#) and would like to know how I can remove the decimal portion (to the right of the decimal) of a real number. I want the whole number portion but do not wish to discard the decimal portion; that will be used for additional calcs. Does C# have any methods for doing...more >>

Hey guys, I just recently got introduced to data mappers (DTO mapper). So now I have a SqlHelper being used by DTOMapper and then business layer is using DTOMapper when it needs to persist object to database or load them back. Everything is working nicely so far. My question is, is it OK ...more >>

Hi! I have this method that gets the OS suite and product type, but it is always returning null. Can anyone help me, please? Here is the method and other necessary code: [StructLayout(LayoutKind.Sequential)] private struct OSVERSIONINFOEX { public int dwOSVersionInfoSize; public...more >>

i have a question about this situation: i have a class that i use that i need to know 1 piece of data that exists in a different class. Im wondering is it wrong to add the property that i need onto the first class instead of having to instantiate the whole other class for a single property? ...more >>

Hello friends. I have trying to figure out how to identify a Par number (divisible by 2) but I couldn't find any method. Does anyone knows how to "know" if an integer is a Par number?? thanks in advance Jose ...more >>

Hello, I am using the BITS downloader to retrieve a file as part of a self-updating application. The file is called xyz.dll -- and when BITS tries to get it from its location (where it's hosted on a MS IIS Server), IIS sees the request for http://myserver/xyz.dll and attempts to execute the...more >>

Is there anyway to have cross-file bookmarks? I'd want to be able to quickly jump to a specific spot in a specific file. The toolbar bookmark command only seems to work within the current document. Thanks, Keith ...more >>

I'm doing a recursive function that receives a TreeNode object. It's traversing an XMLDocument and putting the data in a TreeView. The problem is that to start out, I only have a TreeView object. So to add nodes in the beginning, I have to call TreeView.Nodes.Add() But for everything but...more >>

I use the Documents and Settings\All Users\Application Data\AppName folder to store xml settings that are applicable to all user who log onto a machine. (The uers personal settings associated with my application are stored in the system registry's HKEY_CURRENT_USER section) When the xml fil...more >>

Hi everybody, I've got a TreeView and when ever I right-click on it, the ContextMenuStrip should comes up. The problem is the following, if the user didn't left-click an then right click the node he or she desired, the ContextMenuStrip will show the options for the node that was left-clicke...more >>

Hi, Is is possible to create an event handler method that can handle any type of event no matter what the delegate signature is. Here is the code I have so far: public class class1 { public Delegate Hook(Type eventHandlerType) { Delegate eh = Delegate.CreateDelegate( eve...more >>

Foundation...Accessing derived class members through a variable of their base class is just a matter of casting the variable to the derived class. How would you access the derived class members in a collection of type base class where the collection is derived from CollectionBase? I know th...more >>

I have the need to perform an atomic operation in two systems, a database and an ftp site. The process is two step; 1. insert a row into oracle, 2. delete a file from a remote ftp site. I need to make these steps atomic...either they both succeed or both fail. Any suggestions on how I creat...more >>

I have a datagrid that will display data, and based on the security level of our user's they may not be able to see the data. However, I still want the column to appear in the grid and just mask the data with asterisks, one for each char in the value or a fixed number, but none if the value is...more >>

I have two forms, frmBase and frmInherited. frmInherited inherits from frmBase. On frmBase I have 8 controls, these 8 controls show up on frmInherited but not always in the same position as they are on frmBase. I have the following questions: 1) how do I fix this? 2) how do I prevent the f...more >>

hello, I have to call the Handle from a process and FullTrust is needed otherwise it happens an exception. currently i am using only this code and the exception occurs. [PermissionSet(SecurityAction.LinkDemand, Name="FullTrust")] how is PermissionState.Unrestricted to implement? ...more >>

Hello Everyone, I am trying to access a C# class from vbscript. All is file, except for the case when I want to use optional parameters or function overloading. As I found out, optional parameters are not supported by C#, function overloading is not supported by COM. There is an attribute: ...more >>

I am trying to us a simple NetworkStream to transfer a file over tcp. This works most of the time, but one specific file never downloads(.mdb file). It seems to close the socket and I get an "unable to write data to transport connection" error. I have tried multiple ways to transfer this ...more >>

Hi all I'm wrestling my way through OOPs concepts and have a question on set{}. Can anyone help From the stuff I've been reading, set and get are accessors to class properties (i.e. local class variables) which inturn are used to reflect the state of a particular object. I can underst...more >>

I have a C# Windows Service running as the NetworkService account because it needs to access a network share. As part of the service's initialization, I want the service to terminate, if an unrecoverable error occurs. When that case occurs, I create a ServiceController object and call the ...more >>

I have to implement a application that use Serial COM ports and I was thinking to use VS2005, but I wan to know is that is true that is stable ? I heard that the release date is November 7 2005 and I have to release the app in August 2005, I want to move to 2005 so I can use ths IO Serial COMM...more >>

Hi, a thread I start with: threadQuoteRunner = new Thread(new ThreadStart(_quoteHandler.QuoteRunner)); threadQuoteRunner.Start(); but if I try to stop him, it doesn't work: threadQuoteRunner.Abort(); In the constructor of QuoteRunner is an while (true) loop. In the debugger I can stop the...more >>

I am trying to find out if C# has the ability to tie into windows so that when a user tries to save a file from any windows application a save as dialog box opens that is written in c# with other save properties such as owner, person saving, notes etc.. that are not normally part of the save ...more >>

Hi i have created one .resx file for adding 38 Images............... after creating it when i open it and reads it through IDictionaryEnumerator or by using DictionaryEntry structure i am not getting images in order i have added in resource it means following resx file is created with A B C...more >>

We are developing an application in C# that runs on a PC and communicates with a piece of equipment via the ethernet. For testing we have developed a simulation of the equipment that we want to run on the same PC as the application. We assigned the address 127.168.8.225 to the application an...more >>

I am about to take my first crack at C# and would like some suggestions/best practices for approaching the app I am looking to build. Here's a simplified description of the problem : The client application will handle displaying a countdown timer that will be controlled by a remote administrati...more >>

Hi I need to open flat files using C#. I need to work very fast, but when I used StreamReader, This is very slow. Anybody knows how to work FILES very fast using C#. I need to read 3 millions of records at least a minute. How can i access FILES very fast (flat files)? Thanks for your h...more >>

Is The following Code valid it is like a mini thread pool(a friend at work wrote it)? I have cut down the code a bit but kept the essential parts. The main part that I am would like explainedis when the async callback gets called and the the line m_WaitCallback.EndInvoke(AsyncResult); Ho...more >>

Hi, I have an error dialog which shows the stack trace, usually without line numbers in the release version. To try to diagnose a particular problem, I have provided a user with a debug version of my program, and now line numbers do appear. However, there is no line number at the top lev...more >>

Hi all, I'm having a problem with a reg ex. Essentiall, I'm trying to isolate variable declarations from old vbscript where there was no explicit declaration requirement. This should seem easy enough - just identify by the assignment statement; except for the fact that vb uses a single '=...more >>

Hi, does anyone have any idea how to trap a double click event in the title bar of a form? I'm wanting to use help icons on titlebars, but this means that I can't have minimize or maximize buttons, and as a compromise I wish to enable a double click on the title bar to either minimize or ma...more >>

Has anyone heard or know of a tool that takes an h file and builds an interop .cs wrapper to it dynamically? Thanks, Udi. ...more >>

Hello all I've a problem, I need to develop a component to connect a web service for sending SMS. The web service it's not implemented in .NET.I need to use basic authentication (at least that is what I've been told). The most strange thing is that when I add the web reference in Vi...more >>

hi , Is there any way to reverse enggineer the vb.net code from dll file(Portable Executable) i know the tools reflector but it doesn,t give me complete vb.net /c# code. Is there any other way to do that -- Have A Good Day, Mahesh, Maheshmandhare@yahoo.co.in...more >>

Hi I have interview tomm i was searching for interview questions i have just got these two sites any more links http://www.geocities.com/dotnetinterviews/ http://www.techinterviews.com/ will be appreciated ...more >>

Hi Folks, I want to create Activex component. Can we create it using c#.net or do I need to create it using vc++? Thanks in Advanced, Deepak ...more >>

Hi All, I want to declare an interface in C#. I have the equivalent code for VB.NET but when I try to write the corresponding code in C#, it does not work. Can anyone please help me by providing the correct code. I am pasting below both VB.NET code (working) and C# code (not working) <V...more >>

How to translate the following C++ typedefs into C# ? typedef struct { BYTE *data; size_t length; } VizBlob; typedef struct VizUserInfoActions { HANDLE (IMPORTED *createFullInfo) ( HANDLE logger, const VizBlob *blob ); const VizBlob *(IMPORTED *fullInfoBlob) ( HA...more >>

How do you reference a Hashtable in an ArrayList? ArrayList al = new Arraylist(); al.Add(new Hashtable()); now howto add/access hashtable entries? thanks, matthew....more >>

I would like to make some of the rows in the datagrid read only according to certain condition. How can I make some of the rows editable while others read only in a datagrid? Thanks! ...more >>