Greetings Experts, Hopefully someone can help me out with this problem. I've been trying to solve this problem for the past 10+ hours without any result. This is my last resort. Someone please respond. I am a newbie to using DataSet's and DataView's so I apologize in advance if my problem ...more >>

Hi, I created an aspx page with a Datagrid control that should list a bunch of records from a MS Access database table. When I load the page on Web Server , the datagrid itself is not visible. The dataset is filled corretly, but the datagrid won't show. Thanks, Fabrizio ...more >>

I want to select a single which has the mix attribute value <= 40 and max attribute >= 40 node from the following xml <range> <age min="21" max="30"></age> <height min="1.2" max="1.6"></height> <weight min="20" max="50"></weight> </range> <range> <age min="31" max="40"></age> <he...more >>

i would appreciate some assistance in finding a reference that describes how to set up a tcp/ip server/listener in c#. also samples would come in handy. thanks m ...more >>

Hi, I've been thinking about how to do this, but can't think of a solution. I have a class that is derived from System.Web.UI.WebControls.DataGrid which works a treat, but I'd like to extend the DataGridColumnCollection class (property of DataGrid) just a fraction by allowing a string indexe...more >>

Hi, Since C# is ECMA draft standard, why isn't VB.NET going for standardisation also? Is this because like VB6, it is a closed language and propriarty? VB6 will be ending in a few years officially (according to support.microsoft.com information), no good business reason to use a propriety ...more >>

Hello, The following code writes the text string: Uri uri1 = new Uri("http://www.here.net/aplace?param=one"); Uri uri2 = new Uri("http://www.here.net/aplace?param=two"); int h1 = uri1.GetHashCode(); int h2 = uri2.GetHashCode(); bool e = uri1.Equals(uri2); if (e == true && h1 != h2) { ...more >>

How be able to manage more deeply UI of TabControl and TabPage For example - I want to manage border color, change color of TabPage reef, eliminate spaces from both sides of the reef, so I bould custom control that inherit all information from TabPage, but how to access those properties, not su...more >>

Hi, I'd like to know if it's possible/responsible to use the ReaderWriterLock class (RWL) in a class without declaring it as "static". The example in the SDK does not use a static RWL. However, the documentation has the standard disclaimer of "Any public static members of this type are safe f...more >>

Hi, Is there way in C# (or C#.net) to just define a function without having to initialize the class every time. For instance a function that takes a number, adds 2 and multiplies by 10. I know how to do it in a class. But the problem with classes is that it has to be instantiated every time....more >>

I do this kind of thing all the time in applications but with ASP.NET i have problems with selecting an item in a list box and reading that selected text out when something like a button is pressed. First the problem was to do with the listbox losing it's selected item, now i've managed to keep ...more >>

So I'll preface this with the fact that I'm a UNIX developer by training and have just recently gotten in to C# development on Windows. I'm basically running in to a problem whereby I suspect something to do with process groups or threads and closeOnExec semantics (to speak in POSIX terms) is c...more >>

In C# if I want to know the time in hours (fractional as well) between two times how would I do that? Current code is as follows: DateTime startTime = DateTime.Parse(e.Row.Cells["StartTime"].Value.ToString()); DateTime endTime = DateTime.Parse(e.Row.Cells["EndTime"].Value.ToString()); ...more >>

diggityduncs (Programmer) Nov 13, 2003 Hello, I'm tring to use a win32/api dll in c# The vendor I received the dll from doesn't know anything about .net I received two files ACGAPI.DLL + ACGAPI.LIB and some example source code Declaration: Visual C/C++ extern "C" ...more >>

Hi, I have some problems with starting my asp.net application. When I entering on login page I see message that it can't find file WebUIValidation.js. I found in MSDN about aspnet_regiis.exe and configuration asp's application. I configured it, uninstalled my framework 0.5 because I had two fram...more >>

Please check your clock and time zone settings, you have future posted. ...more >>

Hi, how can I easily link a Trackbar to a TextEdit control in order to see the trackbar value in it ? thanks. -Marc ...more >>

Hi Everybody, I've got this problem when signing this interop. All my project dll's are signed correctly except for this one where its a com reference. I've read the KB http://support.microsoft.com/?kbid=313666 but after trying this it still doesnt work. It either says that it cant find the fi...more >>

Hi, I just stepped into C#. I am facing one problem. Here is the scenario. I am posting some data to one website (https site). It returns me response HTML. I want to parse this HTML and want to look for some specific tags. To achieve the same, I wanted to use MSHTMLs HTMLDocumentClass Interface....more >>

I have seen a very strange piece of code being generated by the C# compiler and was hoping someone might be able to shed some light on it. I've reduced the example down to a bare minimum and I am using the .NET 1.1 framework. Here is the C# code: using System; namespace Example { clas...more >>

Newbie to .NET question I have a form Form1 that will instantiate and show a second form Form2. Form2 has a slidder control that I want to use to update a value of an activeX control on Form1. How the heck is this done. In a regular Windows app in C++ I could just post a message in VB I could c...more >>

A business logic component creates a registration request for an asp.net application and it inserts the request to the database. The data access component returns a request key for the inserted request. After receiving the key the business logic component sends an email to the user. This whole p...more >>

I have a frameset with multiple aspx pages whithin it. I lauch the page and notice that it triggers many session_start events. In fact I knotice multiple events for the same page. I am also using windows authentication. On a few pages I get guest and then the user who is loged into the comp...more >>

Hello, Every now and then my application throw this exception: "Unable to read data from the transport connection" And when I break into the Visual Studio, the thread where it failed has none of my code and the following is the call stack: system.dll!System.Net.Connection.ReadCallback...more >>

I was disappointed to see that you can't use a parameter type as a base class for a generic class. I would find it extremely useful to extend a generic type of class (as is done nicely using C++ templates). For example: public class SoapClientProtocolWithHeaders<T>: T where T: System.Web.S...more >>

Is is legal to declare abstract members in non-abstract classes? How about non-abstract members in abstract classes? I am writing a base class with three derived classes. The base class will define the behavior for most, but not all of its members. The derived classes will define the behavior ...more >>

I am trying to "join" two existing DataTable objects based on related information without having to request the data from SQL again. Lets just say the DataTables are contained in a single DataSet. I am struggling with the manipulation of data once it is all contained within tables inside a dat...more >>

The table I am reading has the potential to contain millions of rows. Can I run the select command multiple times to update the dataset without those inserted rows appearing as updated?...more >>

Can I access/update a single dataset in a multi-threaded envirnment using C#? I'm assuming this is possible, but don't know how to go about it. This scenario is hypothetical so I can't give any specific code examples. I believe there is an article about in using VB.NET, but I haven't seen i...more >>

you are given two rectangles, each defined by an upper left(UL) corner and a low right(LR)corner,Both rectangles' edges will always be parrallel to the x or y axis ,Write a window program with c# that user can use mouse to draw the rectangle add the program will determines whether the two rectang...more >>

Can anyone tell me what's the command in c# that is equivalent to the instanceOf in java? thanks ...more >>

Hello, I try to create IPAddress object from array of bytes and it always throws exception, even when array of bytes is taken from proper IPAddress object: IPAddress lAddress=IPAddress.Parse("1.2.3.4"); byte[] lBytes=lAddress.GetAddressBytes(); IPAddress lNewAddress=new IPAddress(lBytes); ...more >>

What's the best way to determine in code which control on a form has input focus? I'm programming an edit menu (the usual cut, copy, paste), which needs to target one of several text boxes on its form. Specifically, the menu needs to target the text box that has the input focus. For the moment...more >>

I am trying to use a string as an in/out parameter from C#. I have a win32 dll that exports a simple function: extern "C" __declspec(dllimport) int ShowTheMessage(LPSTR str) { MessageBox(NULL, str, "Testing...", MB_OK); strcpy(str, "XXXXXXXXXXXXXX"); return 42; } As a non ref para...more >>

Hi, i am newbie here and need help. Subject: Multidimmensional Cube In the following code I send the sql query to mssql and retrive data to objCellSet object. My problem is: In retrive data I have 10 000 records, get_Item() method is too slow, does anybody knows why? Is any better solution for t...more >>

Hi, How can I get the type of the caller of a method via reflection ? I want to know what type actually called the method. For example. Class A method Afn() calls Class B method Bfn() How can I actually programatically via reflection inside Bfn() get the C.Afn() type that a...more >>

Hello, We are developing a web browser windows application. Is there a sample C# applcation with source code that demonstrates how to do this? Thanks, Jacques...more >>

Hello, i am trying to decode a .eml file, parse out the header and the body and what not. and i'm trying to figure out what would be the best method of reading the email into, a string, stringbuilder, memorystream, byte[] or any other method, because one thing that i'm running into, is ...more >>

Here are three simple classes: class A { public void DoIt(B b) { DoSomething(b); } public void DoSomething(B b) { } public void DoSomething(C c) { } } class B { } class C : B { } Here is some simple code with line numbers: 1. A a = new A(); 2. C c = new C()...more >>

I am currently hiding a form until a key is pressed (I am using the command "this.Hide();" to hide the form). When that key is pressed, I am once again showing this form, with the command "container.Show();". My problem is that when I do this, it always brings up the form in a minimized s...more >>

Hi, I've deployed the app I wrote through an Install Wizard project. I place a link on the user's desktop, and in the program menu, using "shortcut to primary output....". When I click the icons on my computer the app starts up. Now when I installed it on a second test computer, I clicked on ...more >>

I am trying to implement the MVC design in my winform app. I have few questions about it. First when I am binding a dataset to a control what I do know is have the controller class invoke an event in the UI by passing it the dataset from the data layer. I then bind the dataset in the UI, is th...more >>

Hi, This is my first post on this group. I have strange problem with starting new Thread. When I'm running application (release version) on computer with Visual ..NET, all works properly. When I'm running the same application on computer without Visual. Thread doesn't start. (I'm using fr...more >>

I have an object that I want to add to an ArrayList. However, I don't know ahead of time how many objects I will need to add to the list. Therefore, I had built a function that created an instace of the object, set its properties, and then added it to the ArrayList. The function would then...more >>

I have a COM server that's generally working ok. But one of its methods, when the IDL gets read by the Intertop layer, has parameters of type "out object". The C# compiler tells me that it can't convert from object to out object, or from int* to out object, or from object[] to out object. In...more >>

Hi This is a fairly generic question about programming style and to a certain extent garbage collection. I have some methods that I write to text logs, the event log etc at various places in the method. What I do is open the various logs at the start of the method and, being good, I explicitl...more >>

Hello there. Why does one need to use "new" keyword in C# in order to construct object? Does semantic of constructor invoke have other meaning except of object construction in the heap (or value type in a stack)? -- Vladimir Nesterovsky visit: http://constcli.sscli.net e-mail: nesterovsky@...more >>

Hi, How to print crystal report on printer? I need code in c#.net and i shold not get print setup dialog box and I need to provide number of copies to print programatically. Thanks, Venkatesha R ...more >>

I have a server.transfer question. I have a page that utilizes the server.transfer method. On the page that is transfered to - lets say page 2, I want to do another server.transfer. This gives me the error: System.InvalidCastException: Specified cast is not valid. What is the proper wa...more >>

I am developing an application which at some point must write registry value in the registry of type REG_DWORD_BIG_ENDIAN. Does anyone know what data type i have to use to write REG_DWORD_BIG_ENDIAN in the registry May thanks in advance Stelios Panayi ...more >>

Hello, The DataGrid.CurrentCellChanged requires too much overhead to determine when only the row has changed. Can anyone suggest a way to fire an event when the user selects a different row in a windows forms datagrid? Perhaps this can be done by examining the underlying DataTable, but I'...more >>

Hello, I am currently trying to respond to custom messages sent via SendMessage/PostMessage from my unmanaged C++ dll in my C# application. I am responding to these types of messages by overriding WndProc function in my C# form. This works fine until I attempt to populate an LPARAM with a...more >>

Let Me know one thing whether the following is possible on C# or not. Whehter Optional parameter's are allowed in C-Sharp or Not? I am talking about trialing Default argument. In MSDN There is one topic called default argument Values. It's not very clear. Note : without overloding a MEt...more >>

I have a class the reads in a file and sets the values of the file into its properties. This class is used to populate the data onto a form. This form has controls created at runtime based on user input (file values when file is opened). I was hoping to put the name of the property in the tag ...more >>

hello, i'm currently using a PropertyGrid to monitor the properties of some numerical objects, mainly composed of ints and floats that must stay in a specific range. The logical choice for editing that is a TrackBar in a DropDown control. I managed to write the code for that and it works. H...more >>

HI, How i can use the Microsoft.Web.UI.WebControls reference inside a web project? There is any DLL to add? Thank you, Fabrizio...more >>

Hi I use the following syntax to have events inherited from base to child classes which works nicely (virtual and override keyword on events). But I am wondering if it is a "supported" way of using events since I never saw it used anywhere in MSDN documentation/samples?! Or it will just break when ...more >>

how can i create object declaring it's class during run-time? fe. i ask user for classname. after he enters, i'll need to do something like this: IMyInterface obj = (IMyInterface)System.createObject("EnteredClassName"); of course i assume that EnteredClassName implements IMyInterface. ...more >>

Hi; How can I mark a DataTable as dirty (has changes)? I need to do this because when I add a DataColumn to a DataTable, it does not set HasChanges() to true. thanks - dave...more >>

hi, does any one how to do regex to get the charset in this strings? "SCRIPT language="JavaScript" charset="ISO-8859-1">..."...."..."...">?" ^^^^^^^^^^ I want the value after charset, (charsets value is not consistant) I am having problems with the ...more >>

Hello, I have two C# applications that use some files common to both and some files unique to each. On the computer itself I have them stored them in folders PROJA, PROJB, and COMMON. I would like to set up a similar structuring in the IDE so I created a solution containing two projec...more >>

What is the size of a reference type and why? Thank you ...more >>

Hey gang, Ok, I'm stumped on this one... I am using the using statement to wrap a SqlDataAdapter that I am using to fill a DataTable. Now, what I need to know is, just how much block-scope applies to objects created in the using scope. For example: <code> static DataTable getTable() { ...more >>

How can I have a resticted access to assembly? I want onlt code I am writing to be able to access my assemblys. Thanks, Ron ...more >>

After binding an arraylist to a datagrid, is it possible to allow the user to add and delete new rows on the datagrid just as they would if a datatable were bound to the control? I have tried to implement some interfaces but nothing has been successful so far, thanks in advance, Jordan...more >>

Hi, I need to export the content of a DataGrid (in Windows application in C#), into an Excel spreadsheet. Anyone knows how to do this? Any code snippets would help! thanks a lot, Maria...more >>

Hi, Is it possible to have the code secure? Meaning that know one can use LDasm to read the assembly? Thanks, Ron ...more >>

Hi, I am trying a basic opearation of splitting a multiline value to an array of single lines(Actually making Address into AddressLine1, AddressLine2). I used Environment.NewLine in split, I could get only 1st line, but it is not returning 2nd line. here's code: string[] address = null; stri...more >>

I know that print funciton will be available in the application for each type of file. My question is, can I print a file(any type, e.g. word, bmp, html, etc) in program? No printer dialog should be prompted. Can this be done?...more >>

In visual c++, I can send parameter to a new thread when createThread(). But in C#, how can I send parameter?...more >>

Hi, How can I call JavaScript from C#? I've create a Window User Control, that I put on ASP.NET site as Object tag. Now, while some function from my control is being proceed I need to call a JavaScript function that is on the site (same as my control). Best Regards, Jakub Gutkowski ...more >>

Hi Guys, any of you have a tutorial for coding a IE toolbar? I am not looking for a finished code but a 'from scratch' kind of article since I want to learn C# as well. /K...more >>

Does anyone know of where I can find information about database programming in C#? It should be from beginner and up? I'm interested in online info and what books you should buy....more >>

Hello, I want to develop a simple activeX control with property page support in C#. Any code samples/reference material will be highly appreciated. Thanks in advance, Laxman ...more >>

Hi. I have an apsx page with a Panel inside. The panel has his properties Width and Height set to 590 and 390 respectively. I call a function to make up an table inside this panel. That table has 2 columns. The size of the first one has 2/3 of the panel.width and the size of the second one has...more >>

Hi, I have a dialog box with a multiline textbox and three buttons. The obvious thing I'm suffering with is how to give focus to the textbox, so that when the dialogbox pops up, the user could immediately start typing without having to click in the textbox. I tried textBox.Focus(), textBox.S...more >>

Can anyone tell me a good way to make a blinking systray icon? I want it to alternate between two icons. I've tried toggling between two notifyIcons and alternating the visible variable - but that makes the taskbar blink. I'm new to C# so I'm not really sure where the drawing mechanism takes ...more >>

I have a problem accessing a DLL using C#. I'm using C/FRONT with Navision's CFRONT.DLL, which contains the method: DBL_S32* DBL_NextKey(DBL_HTABLE hTable, DBL_S32* Key); typedef signed long int DBL_S32; In addition the documentation says that "hTable" is the "Handle to the table" and "K...more >>

im at my wits end. where can i get icons for an application im building. i need the usual ones, align, font size etc but i simply cannot find the icons. im probably being dumb but ive tried all sorts. the net, groups, icon extractors (i had 15000 on my drive, but they were all icons, not too...more >>

Can some one send me a sample DLL file which wrote in C# language....more >>

hi, help me with ideas or somehow please. how the "exe" books are done? I want to make an "exe" book, for that I added some html files, added LinkLabels, but do not know how to load that html file into my Form. or it is a wrong way for that? and, I added Reference in my project to IEHost ...more >>