Hi all. I have a small problem. I have a listview which contais 4 columns. (No. / Desc / Contract / Product). other properties to this listview (lvActivities): lvActivities.View = View.Details; lvActivities.FullRowSelect = true; lvActivities.HideSelect...more >>

Hello. I have a small C# program which uses a number of large arrays of double. The program runs fine on my desktop PC which has 2 GB of memory, but when run on my laptop with 512 MB the laptop practically freezes up, from running out of memory. I would therefore like to modify my program so t...more >>

Hi, My application is splitted into more than one assembly. And I want to clean up the methods which are not called or not used among any of the assemblies. Can any one suggest me the tools available to find and remove the un used methods or members? Thanks in ...more >>

Can someone give me the one paragraph answer to when and why I should use each of the following classes (versus each other): StreamReader/Writer StringReader/Writer TextReader/Writer BinaryReader/Writer The first two, in particular, seem to do much of the same thing and both work with c...more >>

Hello!! You may correct me if I have made any wrong assumptions. Below I have some simple classes. When you have this t.ToString() below it's the ToString() method in Object class that is called and when you have this t.GetType() below it's the GetType() method in the Object class that i...more >>

Hi all! Did anyone try the subj? I use extern IsClipboardFormatAvailable and GetClipboardData from = user32.dll. IsClipboardFormatAvailable(14) returns true, but = GetClipboardData(14) returns null-pointer after that. I found working source codes that can get CF_ENHMETAFILE from c...more >>

I'm using 1.1/vs.net 2003 ... C#example.............. string myPath = Server.MapPath(".\\Data\\" + (string) Session["LogoFileName"]); Produces this value in myPath ?myPath @"c:\inetpub\wwwroot\CSharpCustomers\Data\GaryRocks.jpg" VB example............. Dim myPath As String =...more >>

This code shows all values for the config node. I'm trying to retrieve the value for systrayenabled for attrib "jon". Something wrong? sXmlPath = Application.StartupPath.ToString() + "\\settings.xml"; XmlDocument xmlConfig = new XmlDocument(); xmlConfig.Load(sXmlPath); XPathNavigator navig...more >>

I want to get the ASCII Bell character (7) as a string. How? I'm pulliing my hair out over the stupid little task. HELP!!!!!!!!! ARRRAGGH! -- #####-----#####-----##### POV Tips and Hints at ... http://povman.blogspot.com/ ...more >>

I'm trying to use a C++ .lib from C# (I tried the Interop group will no results). I have a working wrapper DLL (I can get back simple things like int), but I'm having issues dealing with an array of bytes. For example, the .lib contains this function: int create(int id, int scale, unsign...more >>

All, What's the easiest way to convert the string like 1001010101101010101 into a binary mask of type Int64 and back? ConvertBitmask or something like that? Just D. ...more >>

I just realized that I need elements in my List<> to be doubly linked. So I searched for "C# Linked List" and found the LinkedList<> class. I was happy until I looked at the docs for this class and realized that it's missing so much. For example, Find(predicate), operator[], etc Is there...more >>

I'm trying write a SQLCLR that returns FileInfo.Attributes property to SQL Server in a record set and I am getting the following error. cannot convert from 'System.IO.FileAttributes' to 'System.Data.SqlTypes.SqlInt32' How can I convert the Attributes to display an integer value. Clearly t...more >>

I'm dynamically compiling some code and adding needed referenced assemblies. When I add references to DLLs using an absolute path there is no problem. When I add *relative* references to the system DLLs there is, again, no problem. But when I try to add a *relative* reference to 3rd party m...more >>

Good afternoon all, I guess I am missing the benefit of using datasets with Crystal. For years I have written wrapper apps that used the Pull method and I let Crystal do all the sql work. Now I have an issue where the queries run for 4+ minutes so I don't want Crystal doing repeated legwork....more >>

Hey guys, I'm trying to set the Rtf property of a Richtextbox and I'm having some issues. First I do this, which works fine: string test = @"{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fcharset0 Arial;}} {\*\generator Msftedit 5.41.15.1507;}\viewkind4\uc1\pard\ul\f0...more >>

I am writing in C# .NET and am using System.Environment.TickCount (32-bit integer) to get the number of milliseconds since the server was rebooted. The problem is that the server has been up for over 30 days and the 32-bit integer is coming back negative. Of course, I can extend it with zero...more >>

Hello all! I'm trying to deserialize an object which has a few members which no longer exist. Is there anyway using a custom binder to remove the reference to these objects or just return a null? Thanks, Joe ...more >>

Howdy all, what is the same DivRem function for Mobile development. I'm using the ..NET compact framework. Thanks all, Marcelo Muzilli ...more >>

I know there are ways to make this a lot faster. Any newsreader does this in seconds. I don't know how they do it and I am very new to c#. If anyone knows a faster way please let me know. All I am doing is quering the db for all the headers for a certain group and then going through th...more >>

I am compiling a winform app using nant. I first compile via VS.NET, which generates *.resource files in obj\debug. Then I use the <resources> tag in the Nant script to complete a build via Nant. I did try the Nant build by accessing the *.resx file instead. The app throws this error when I...more >>

Hi All, Any ideas on how to resolve the run-time exception: "Unable to load DLL 'EventMgr.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)" It's raised when my app calls a static function in the dll. In my app I have: [DllImport("EventMgr.dll", EntryPoi...more >>

Hello!! As you know every user defined exception must be derived from class Exception. Now to my question if I write catch then every exception will be caught. If I instead write catch(Exception) then every exception will also be caught. These two will catch the exact same exception is t...more >>

Hi: Is there a way to tell exactly how many chars a RichTextBox can display (no scroll bars)? The Font used may not be fixed width font. Thanks in advance! Polaris ...more >>

I developed an asp.net/crystal app in my local machine using the crystal reports which comes with VS 2003. Now I am planning to deploy it to a web server which support asp.net and crystal reports (version 9). What steps I should follow to make a successful deployment? Thanks in advance. M...more >>

Hi all I have a plain text string, sometimes the string will contain special characters, how can I encode this string in xml format? Thanks Kev ...more >>

Greetings, I'm trying to access C# COM object from a VBscript, where C# will modify the reference parameter to an array. I found simple reference parameter datatypes (i.e. int, string) yield to expected result, however, when I try to create an array of these primitives, I encounter strange ...more >>

Other than the Design Patterns book, which book(s) is/are the best to learn object-oriented software design/architecture from ? ...more >>

I am seeing a discrepancy on how bit shifts work in C# vs. C++. In C++, if you do a bit shift and it overflows, the bits are lost. i.e. in C++, -1 << 32 would produce 0. However, in C#, this same expression yields -1. Is there anyway to have C# bit shift behave like C++? -- ------...more >>

Are these two equivalent? Is one better than the other? I tend to go with #1 but started wondering.... Thanks, 1: using (SqlConnection cn = new SqlConnection(DataConnection)) using (SqlCommand cm = new SqlCommand("ItemCount", cn)) { cm.CommandType = CommandType.StoredProcedure; ...more >>

I need help with background worker and form I have a class (form1) that works with database. I need this: -Show form2 while form1 is geting data from database -When form1 is done, close form2, proced working form1 I try these things with thread but a can not do it I try it with background w...more >>

Hi. I have an application that uses sockets, as per below: m_clientSocket = new Socket (AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp ); int iPortNo =8000; IPEndPoint ipEnd = new IPEndPoint (ip,iPortNo); m_clientSocket.Connect ( ipEnd ); It works fine,...more >>

Hello I recently used VS.NET 2003's Copy Project to create a "release' version of my asp.net app. On the same machine where the development has occured, I loaded the app and all worked fine. I then copied all the files to our production server and began testing the application there. So fa...more >>

I'm new to C# (and Microsoft in general) so this may be a simple problem, but I haven't been able to figure it out yet. I've got a database with a number of different tables and I want the user to be able to select which table they want, then have that table pop up in a datagridview. I've fig...more >>

Hi all, I have a problem which seems it has to have a simple solution, though I can't figure it out and I can't find a solution on usenet either. Two forms: Form A contains a textbox where the user can enter a date. When doubleclicking the textbox, a form B wil open with a CalenderControl t...more >>

Can any one please offer any theories on how ManualResetEvent.WaitOne can hang when used with a timeout? When I notice my USB/Serial devices are no longer receiving communications, I hit break all, and one of the threads is hanging at: bool replyReceived = readerCommand.SignalReply.WaitO...more >>

Hello all, I have a C# control that is housed on a form that was created in VB 6. There are some activities I want to do only if the control is on the ActiveForm. However, since the form is a VB 6 form when I call Form.ActiveForm I get a null back, even though I can see the form is the active ...more >>

Hi, Here's a little hack I put together to try to get to the bottom of a problem I'm having with trying to base64 encode a hash value. The hash value contains character codes 135 and 130 amongst others. This snippet will set up a string of chars 190, 135, 130, 73, 242, 243, 10. It puts th...more >>

So Im trying to learn to program with C#. And I have this question about why the string array won't work in the first class but it does in the second. To me it looks like they do the exact same thing. class Test { string[] words; public Test() { words = { "", "", "" }; // This doesn'...more >>

Hi, I have a different requirement and it is : I need to validate a phone number field. It may or may not be a US phone number. The constraints are : *********************** # It should accept any number of numbers # any number of - hyphens # and one + symbol # no other charac...more >>

Hi, I have a different requirement and it is : I need to validate a phone number field. It may or may not be a US phone number. The constraints are : *********************** # It should accept any number of numbers # any number of - hyphens # and one + symbol # no other charac...more >>

Hi, I create a class with a property called MyProperty that needs to register a client script if the value is set to true. When i change the property value to true i always receive a message "Property value is not valid/Object reference not set to an instance of an object". I'm using VS 2005. W...more >>

Are there any know bugs with the ListView in .NET 2? I'm having problems with an application that takes 15 seconds in 1.1, and now takes over a minute. The code in question uses: listViewItem = this.listView1.Items.Add(...) followed by 7 calls to listViewItem.SubItems.Add(...) When I c...more >>

I have a form that is not appearing like it should, in designer mode. It appears that is some problem with an image in my toolbar. It shows the following error: The type 'MyProject.Properties.Resources' has no property named 'Assistencia'. In my case, "Assistencia" is an image in my ToolB...more >>

Hi, I need a data structure such as an Array/ArrayList/Generic List to hold multiple instances of a user derfined class. This array will be accessed across multiple threads. However I dont want to lock the array itself as this will cause poor performance due to the array being accessed f...more >>

Hi Guys, This should be something simple or not possible at all, I have a ‘.pvk’ file and I want to generate a corresponding .spc file, I have followed the instructions on http://msdn2.microsoft.com/en-us/library/9sh96ycy.aspx but failed to generate an adequate cet/spc file, following a...more >>

Not sure why you can't get transparent background with a TrackBar control. Is there any way around this? I've searched for info, but mostly found other people looking for a transparent TrackBar. ...more >>

I have a web.config file which defines different users who can login into the website. After a successful login, the user gets to a page with a javascript menubar at the top. The menu bar needs to be customized according to the "rank" of the user. So for some users, some menu options will not ...more >>

I have this code: System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration("SAS.Int.ComunServicios.ComunProcesos.dll"); The filepath is not useful for me. If I want to use an absolute path like: System.Configuration.Configuration config = Configuratio...more >>

Hi i'm working on chat application in .net , i want to add whiteboard feature in the same project. The whiteboard has been made, but i am clueless about how to share the whiteboard among server and clients,. If any body writes on the board then that must be conveyed to all the connected client...more >>