i want to pass a struct by reference to a function in a c++ dll. the problem is that the call causes an ArgumentException in the calling c# code. i already tried to use "out" instead of "ref" there was no exception generated but i saw in the unmanaged code all fields of the struct were uninit...more >>

Is it possible to late bind to a dll written in C# from VB6? If so, does anyone have an example. ...more >>

I downloaded some dotnetmagic classes from http://www.dotnetmagic.com/ and I added them as reference to my project but I don't know what to do after that. And their page doesn't have any documentation regarding their use. How would I go about using their components in my windows forms? Are the...more >>

I have class B that inherits class c: B : C I have client D the instantiates Class B D.Obj = new B(); I get: dll Referenced class 'b.b' has base class or interface 'c.c' defined in an assembly that is not referenced. You must add a reference to assembly 'c'. I don't want to expose c ...more >>

I have a c# console app that needs a bit of testing before I make it available for free (with source) to everyone. It's a simple program - at this time - which connects to your POP3 server, downloads _only the headers_, and if you have specified the delete (/d) switch it deletes messages mat...more >>

Aaarg. I can find no standard way to represent a Property in UML. http://www.geocities.com/jeff_louie/OOP/twisted1.htm Regards, Jeff *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

Hi, I'm currently writing an application using C#. However, to access and update a database, I must only use rdo (due to a certain reason). I heard I can use the VB6 to make the function of accessing and updating the database and then, compile it into dll. After that, using the C#, adding the ...more >>

I have a base class (say, BaseUser) in my class library that 3 other classes derive from: UserTom UserDick UserHarry Additionally, a fourth class that contains some administrative functions has a method, SaveUser, that takes one of my derived classes as an argument. Ideally, I would li...more >>

How do I load a file(folder) with notepad , internet explorer and explorer in a C# program? ...more >>

Hi, My target is quite clear: 1) Open an excel workbook. 2) Print it to a file 3) Copy the file to a new location Pretty simple, huh? Well, I found it to be a bit tricky. I am able to automatically do the workflow mentioned above but something is missing... In the MS-Word Object Librar...more >>

I am trying to teach myself some .net remoting and I find most of the examples lacking on depth or explanations. are there any good tutorials on this stuff out there? maybe Im using the wrong terms to search on google. Is there a way to get the instance of an object when the object requires par...more >>

Hi, I am unable to create New project in VS.Net which I installed last night. During set up, in 4th cd, there was an error saying that, "Could not register 'C......\VsWizard.dll". I continued with the set up. And after that I open VS.Net IDE to create C# Windows Application. And it does not ...more >>

HI: I'm reading a string that will be displayed in a MessageBox from a resource file. The string in the resource file contains escape sequences so they will be broken up into multiple lines. e.g. This is line 1\n\nThis is line 2. When this string is read using a ResourceManager GetString m...more >>

I'm using a web form DataGrid. When I populate the grid, I set the DataSource to a collection and then call DataGrid.DataBind(). When looking at the DataGrid in the debugger, the DataSource is set properly. When I then get to the SelectedIndexChanged() event, the DataSource is set to null. I hav...more >>

DataTableCollection dta = myDataSet.Tables; DataRowCollection dra = myDataSet.Tables["Plyty"].Rows; DataRow dr = dra[0]; textTytul.Text = dr[0].ToString; !!!!!!!!!!!!!! ( ERROR : Method 'int.ToString(string)' referenced without parentheses ) What shuld I do?? What is wrong... ...more >>

Hi all, Does anyone tell me how to set the width of a custom server control. Because my server control comes in a small box forcing some of it's elements to jump into new lines. Thanks in advance. Prasanna. ...more >>

Hi, I just wanna ask a very simple question. i) Does rdo supported in C#? ii) If not, is there any alternative way? I mean, I must use rdo no matter how. Thanks in advance pcPirate ...more >>

Hi, everybody! I create a control inherited from System.Windows.Forms.Control and override OnParentChanged method: public class MyControl : System.Windows.Forms.Control { protected override void OnParentChanged(System.EventArgs e) { // I look for current parent form Sys...more >>

I want to print a string value that represent temperature. how to print the 'little superscript circle' in C#? thx... ...more >>

Hi, I have a winforms app that will need to save certain runtime values that will need to be accessed by different classes throughout the life of the app. Is the best approach to create a container class designed as a singleton class? Any other ideas? Thanks in advance ...more >>

has anyone been able to release Excel Object from process stack. // my sample cleanup code oWB.Close(null,null,null); oXL.Workbooks.Close(); oXL.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject (oRng); System.Runtime.InteropServices.Marshal.ReleaseComObject (oXL); Syste...more >>

I'm a creating a dataView in the following manner: VW_PRODMAIN = new DataView(ProdMain,"product_id='" + this.PRODUCT_ID + "'" ,"product_id",DataViewRowState.CurrentRows); when I do it in this manner I do not get any records in my DataView. If I hard code the product_id in VW_PRODMAIN...more >>

Hello, I'm creating a table on the fly that is used by a datagrid. I'm also creating a tableStyle that is used for the datagrid to make it look like I want. I'm using the DataGridBoolColumn to make one column a CheckBox field. It shows up fine...as a CheckBox. I looped through the table and sto...more >>

Didn't they used to have a bat file that combined VCVARS32.BAT with launching a command prompt? I can't find it in my DotNet directories or in my Visual Studio tools menu. thanks for any memory-jogging......more >>

Hi, I have a form called form1 on which there are a lot of checkBoxes (they form a 8x6 field). I'd like to create a class in a seperate .cs file which gives some control over these checkBoxes (for example to make them all unchecked). So I now created a .cs file for this class, but I can't a...more >>

Is there no way in .net to get disk space remaining for a given drive??? I can't believe it and yet is seems to be so. If someone knows of a way to do this in the .net libraries I'd be very much appreciative. Thanks, LT. ...more >>

Hi! I have a very newbie-ish question: When I have a comboBox on my form, how can I set it so that the user cannot edit the elements that are selectable in that comboBox? By standard the user can write in there himself, but I just want him to select between the options I give him. Thanks...more >>

I have a form that shows my name on the top half and my address on the bottom half. Is it possible to divide this form into two separate child forms (inside MDI form)? Thanks. ...more >>

I have a DOS application that I want to run from within my Windows C# application (eg. c:\> DOSApp "hello"). is it possible? Thanks. ...more >>

Hi, I have to implement client/server application. The client have to instaniate an remoting object via http and pass some auth info. If the auth is OK, the client should invoke a method (or sequence of methods) which will do the actual work (prepare a binary file) and return it to the clie...more >>

Hi to all, i am just try to send emails in a timer-loop fashion, using the code below and i get the following error message: Could not create 'CDONTS.NewMail' The problem is not happening all the time and i do not understand why is happening at all. The machine i run my app is an NT4 Wo...more >>

Several years ago I wrote a console program in Visual C++, which I am still using. In converting this program to C#, I have encountered the following problems: 1. I build my console display in a back ground buffer and use the function "SetConsoleActiveScreenBuffer(hForegroundBuffer)" to switc...more >>

Does anyone know how to put text on a form (using DrawString or another method) in a certain angle? I can only find ways to orientate text vertically or horizontally, but I'd like to display a string in an angle of 30 or 45 degrees... ...more >>

Hi. I have a c# console application that works fine when it is executed under the context of a user account who is Administrator of the local machine. However, my production environment, no end user is a full Administrator of their machine. Is there a best practice or way out there to s...more >>

Hello. How I can write a program that save a high color image as 256 color or fewer with .BMP format , just like Microsoft Paint. I want to write this Program with C# .NET , NOT with MFC . Thank you....more >>

Hi, I have a C function in a DLL that takes a void* that is passing back some other type, what is the general way to do this with object rather than declaring the actual type that its returning. ATM I am using the function that has the following signiture long someFn(long l, void* ...more >>

I have created an assembly that needs to load types from other assemblies on-the-fly. However, if I use the Assembly.Load() method it tells me it cannot find the assembly that I requested. I assume this is because the assembly is not referenced in the project. So how do I load assemblies that ar...more >>

I've been trying to view my .aspx pages in Design View, but I'm unable to find where to activate the tabs that allow you to toggle between HTML and Design View. Please Help! ...more >>

Hi, Is there some way that I can look at messages which are about 2 or 3 months old? I had asked some questions on deployment over the internet and gotten some wonderful replies which I need to refer to now. thanks LK ...more >>

Does anyone know of any R*tree implementations in C#? There is alot around in Java but nothing good I have come across in C#. Thanks Ralph ...more >>

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A broad question: To what extent is it possible to have C# code integrate with *unmanaged* C++ code? ...more >>

Hi, I have a table IV00108wc which contains several thousand records in whcih ITEMNMBR is the primary key. I have a com+ object returning recordset which has ITEMNMBR and another details related. [I do not have direct query to get the list] I want to query another table based on Com+ obje...more >>

My program copys things from a word document and puts=20 them into an excel spreadsheet. The problem I have=20 though is these annoying symbols that appear in place of=20 spaces in the text after Ive put them into the excel file. here is an example. this is what it looks like in the=20 word...more >>

Hello, Has anyone ever heard about AOT compilers for C#? Any info would be highly appreciated... Regards, RP ...more >>

I Know, ... a struct can not be inherited. ** Is there any tricky way to extend a struct ? ** I have to implement a component that represent a date (without time) that has a small number of functions over those of DataTime type. My first thougt was : "Inherit from DateTime and implement those ...more >>

Hello, is it (in c#) possible, to splitt a large class into two or more files ? If yes, how can I do that ? Thanks Heinz ...more >>

I love the .NET framwework. Compared to mfc this is a dream to work with. I would love if the C# and maybe other languages too, somehow gives more friendly messages when executed on a machine with not .NET framework installed. * Some unmanaged startup stub in the generated executable would b...more >>

Has anyone else noticed that if you try to place a control on a form of the same width, that the control does not completely show up on the form? i.e. If you have a form with width = 300 and you place a button on the form with the same width = 300 (and location = 0,0) that the right side of the ...more >>

Hi, I am working on .NET 2003, C#. I have created a class file and getting... The name 'Session' does not exist in the class or namespace 'RADWebV5.RADAsp.Class.Connection' Connection.cs code.... using System; using System.Data.OracleClient; using System.Web.SessionState; namespace...more >>

Below is code for testing whether an enum is part of a "set" of enums. There must be some better way to do this. How does one get a group of enums and test for inclusion? I want to use sets. But maybe collections? What is the right way to proceed? enum Suit: int {spade=1, club=2, hear...more >>

Hello, I want to now how to do a dynamic report with Crystal Report (C# .Net), the number of colum and row are different each time because they depend of my data base. Thanks Climber...more >>

I submitted this Sat but all the email responses were blocked. I will ask again and look here for a response. Win 2000 When creating a new Web project I get the error "Unable to create Web project The file path c:\inetpub\ wwroot\myproject does not correspond to the URL hyyp://localhost/my...more >>

Hi, This is the first time im working with MSMQ, so a very basic question. If I want to send a message to a queue that already exists on a remote machine, do I need to have message queuing installed on my machine. Thanks. M...more >>

Hi. I want to deploy an upgrade of a software that I made, so I would like to create a setup project that will just install the upgraded components and forms. There is a way to do that? Thanks, Fabrizio ...more >>

Hi, I've got a listbox linked to a DataSet in this way: // connetto la lista di clienti ai dati this.lbClienti.DataSource = GestoreClientiDistributori.caricaElencoClienti().Tables[0]; // imposto DENIMINAZIONEBREVE come valore visualizzato this.lbClienti.DataTextField = "DENOMINAZIONEBREVE"; ...more >>

Hi all, Can anyone tell me whether visual studio .net supports serial port accessibility. I am now doing a project, an unspecified machine is pluged into computer's serial port. GUI is necessary. After i searched the MSDN, I cannot found any solution about how VS .net handles com port reading. I...more >>