I building a small win application that has one form and several classes. I want to allow each class to give a log about its activities, so I created a static method at the form and called it from each class. ex Form1.echo("the message"); //in the form staic void echo(string x){ log_tb.Text ...more >>

The User.Identity of WebPages is set with login controls in asp.net 2.0. Can we set the User.Identity with program not by Login Controls? I have tried the code: this.User.Identity="Jhon", but it fail when compile. ...more >>

I have an operator== overload that compares two items and returns a new class as the result of the comparison (instead of the normal bool) I then get an ambiguous operater compile error when I attempt to check to see if the object is null: "The call is ambiguous between the following methods...more >>

I have written a class to contain tags that are loaded from a spreadsheet. I can load the value ok. But from another class I would like to change a value inside the arraylist. Here is my code (see Update). Thanks wg class Singleton { private static Singleton instance; // Lock s...more >>

I plan to write a Windows Forms MDI application for a medical office. Users must be able to select a patient and view related information on multiple forms; with1-4 forms opened at the same time for the same patient; each form showing a different type of patient-related information. After v...more >>

I am experiencing what looks to be a bug using the AfterCheck event. I have a TreeView which represents a hard disk directory structure. When a tree node is expanded or collapsed, the AfterCheck event is being fired. From my undesrtanding, this event should only be occuring when a node is c...more >>

Hi, I am thinking of using visual inheritance. I am using C# VS 2005. I am concerned about how good it is. I have heard about problems like controls dissapearing or so. Any hints, tips, ideas, concerns ??? Thank you, _dino_...more >>

Yello, Quick Q: What is the fastest way of getting data from a file? Does the though put of the file increase if I collect a great big chunk of it? Eg say 6meg? or does that even help? Does a bufferedstream work better if I am just going to open a file and read it? All I am doing, is o...more >>

Hi, I have an asp.net page that has a save method. I would like to append to the querystring at the end of the save method, before the page reloads. Is there a way to do this without using Server.Transfer? Thanks Sean ...more >>

Are they? I mean, you could always downcast them for particular use, but then the system would be well designed with intefaces instead of generics, and for other uses I don't see any sense (collections excluded). Why do I need to hold something of type 'object'? For what concrete usage? I am ...more >>

Hi! I have a class named CClassToSerialize that contain some boolean, string and few custom variable types. Now when I create only a single Object and Serialize/Deserialize everything is fine. But I want to save more than one Object of this class into same file. Now the problem is th...more >>

I need to some how add a page to a tabcontrol. The problem is I have a single method to bring up the dialog which contains the tabcontrol and doesn't return until the dialog is closed and I don't have any events for it. The only thing I can think of is to start a thread before calling that ...more >>

Hello everybody, I have been searching around the net for a good (commercial or non-commercial) physics engine written in C#. Unfortunately I only know the existence of many physics engine (novodex, ageia, etc.) but they are written in c++. Does anybody know/has any notice/has heard of any w...more >>

Hi I've this code to open a Word 2000, but this generate an error. I reference to Microsoft Word 9.0 Object Library. WordApp = new Word.ApplicationClass(); if(WordApp != null) { WordApp.DisplayAlerts = Word.WdAlertLevel.wdAlertsNone; WordDoc = WordApp.Documents.Open(ref DocFile, ref FalseP...more >>

Hello All, I ham using VS.NET 2003. Have followed instructions from http://gridviewguy.com/ArticleDetails.aspx?articleID=26 along with several other articles to no avail. I am pulling my hair out at this point. What I have is this : Members.aspx file: <HTML> <HEAD> <title>member...more >>

Hello, I've created an arraylist which consist arraylist ..like ArrayList myAL = new ArrayList(); // Main Array List ArrayList tmpAL = new ArrayList(); //Temp Array List tmpAL.Add(2); //Add int to Temp AL tmpAL.Add(3); //Add int to Temp AL myAL.Add(tmpAL); //Add Temp AL to Main AL //(and ...more >>

Hi, I have a web application, code of ASPX page needs to call one static method in another class which does not inherit System.UI.Page class using System.Web; public class Utils { public static void GetSessions() { HttpContext ctx = HttpContext.Current; ctx.Sessio...more >>

How to obtain the current users Temp folder %temp% using C# ?? Thanks in advance JIM ...more >>

What is the best way to construct this type of XML <ROOT><Person PersonId=\"1000\" /><Person PersonId=\"1001\" /><Person PersonId=\"1002\" /></ROOT> when I'm getting back only the three numerical values? The is occuring in a loop and I'm getting a variable such as PersonID, which holds the ...more >>

Hello, I am using a COM object which requires the use of Single Thread Apt.. I have used this before in Windows/Console applications which have the Main[] methods [STAThread] static void Main(string[] args).... How can I use this in a regular web page? thanks -- adi...more >>

How do I configure my WIN2003 SBS server to allow me to use it to develop WebServices? I am trying to use VS Enterprise Developer version 2003. on my Win2K box and create projects on my 2003 server. I keep getting an error trying to save the project on the server. ...more >>

I'm playing with CodeDOM and CSharpCodeProvider. I've found the following possibilities: CodeDOM -> Assembly C# Source code -> Assembly I miss the C# Source code -> CodeDOM only. Is it there? Or it's hidden under the hood? ...more >>

I am allready preventing a second instance of a application from running using a Mutex. How can I signal the first application telling it that the user wanted to start the application again so I can bring a window to the front for example. ...more >>

I am using VS2004 and .Net 2.0. Every time Guid.NewGuid() is called, the returned guid is all zeroes: {00000000-0000-0000-0000-000000000000} In looking at the MSDN documentation on NewGuid(), it states: "There is a very low probability that the value of the new Guid is all zeroes or equal t...more >>

I've just blogged some stuff on Nullable types in net 2.0. http://stevenr2.blogspot.com/2006/01/nullable-types-and-null-coalescing.html Question however as to why you can't simply get an implcit conversion from a ..Net value type to to a Sql Server data type rather than having to use null ch...more >>

Hi, I am trying to read from my application config file and keep getting null. Here is my config file My application is called SampleApp.exe I named the config file: SampleApp.exe.config Inside the config file <?xml version="1.0" encoding="utf-8" ?> <configuration> <appSet...more >>

Hi! There is a way to detect which office version have a Windows? Thanks ...more >>

I'm at my wits end. I have a service that downloads stuff from the web. When it's done it needs to notify a windows app that there's new content for it to display. Everybody seems to say to use remoting but I can't get it to work. I can set up the remote object, I can call the object in the se...more >>

If anyone has experience with DotLucene, then this question might be right up your alley. I have two lists of music titles. Each from a different source. I am trying to match determine possible matches to associate them. I know that any association on text will not be perfect, but I am i...more >>

I have a dll that I need to use in an application that I am writing. Can anyone point me in the direction of creating a class in my project that has all the dllimport statements. I have used the dll but all the dll import statements are within the same code.. Sample Code: /// </summary> ...more >>

I have a 20meg in-memory stack-based array and I'd like to normalise in the client's memory... then add foriegn keys, and display results on a datagrid. I discovered that converting the stack to a datatable my memory utilisation increases to 120 megs. (lots of overhead) Couple of questions...more >>

The C# compiler gives warnings about unused variables. I thin it needs a warning about an unassigned reference. For instance, this compiles without any warnings/errors, but of course blows up when run: SqlConnection cnn = null; try { new SqlConnection(myConnectionString); cnn.Open()...more >>

I have a parameter typed SqlDbType.Binary and length 30. I can transfer to this parameter an int value. How can I transfer this value? Thanks! Mihaly...more >>

My.EXE project does a file reference to a A.DLL. I have the PDB for A.DLL. A.DLL inherits from B.DLL, which I file reference and also have the PDB for. The method I'm referencing in my.EXE is a type of A but derives from B. When the debugger gets to this method and I step into, it skips righ...more >>

I have a C# project that has a tab control with four tab pages. On each tab page is a set of three radio buttons (named radioButton1 through radioButton12). I would like to loop through the radio buttons and set their state without having to form the complete name of each one, something lik...more >>

I really can not appreciate why Microsoft has introduced Anonymous methods. It promotes quick and dirty style of programming and as I can see it offers no advantages over normal methods. I have spent years reviewing source code and asking people not to write anonymous code (supported by some n...more >>

I am trying to store a time in a DB2 time field usinc C# and the IBM managed DB2 data provider. The error I am getting is SQL0181N, "The string representation of a datetime value is out of range." I have tried using the DateTime.TimeOfDay property, the DateTime.TimeOfDay.Ticks property, th...more >>

When an exception is generated is there not suppose to be a property which contains the error code? I'm not seeing this property. Does it not show an error code if the exception comes from a COM component? Thanks in advance for your assitance....more >>

I'm not an expert on XML so have a question I have been unable to find an answer. I have a fairly complex XSD file that was provided to me, for which I used XSD.exe to generate a class. I added both the class and xsd files to a C# VS 2005 project (Not Web Site). I need to create an XmlDocument...more >>

I'm getting a dataset back from a web service and I want to verify that the table I want exists before trying to access it (which will cause an exception.) Is there an easy way to check for a specific table in my dataset without doing a try/catch or is that the easiest way? TIA - Jeff. ...more >>

Hi all I need to make a program that will loop inside the HKEY_CLASSES_ROOT and find the name of the DLL associated with a ClassID. I want to know how can I possible loop inside the classes id ? I tried to look into the documentation of the RegistryKey class but I didn't find something us...more >>

Hello, I have developed a web application that connects to 2 different database servers. The connection strings with db username + password are stored in web.config file. After a code review, one developer suggested that it's a security flaw; therefore connection strings should be kept som...more >>

When I create a new form a private member System.ComponentModel.Container components is created, and appears to be passed to the constructors of various things like timers. Can someone explain to me what the purpose of this is. It seems to have something to do with the Dispose method. If I c...more >>

Hello i'm just starting out with csharp. and am trying to figure out why an sbyte can take any value from '-128' to 128. i've drawn a BIT box with eight bytes, and I'm assuming the eighth bit is used to SIGN the number, which leaves seven bits. when all 7 bits are on you get : 127 so i w...more >>

Does anyone have any good code for a self restarting application? Sometimes I need to exit my application and start it again, what is the best method of doing this in a windows form application. The reason why I want to this is complicated, so a restart is faster and more easier whey of doing it...more >>

I'm streaming quicktime H264 movies to 224.1.2.3:554. Why, in my MulticastReceiver class of another application, have I have to bind my socket locally on the same remote port (554) in order to receive the multicast packets (with the primitive receive)? Why can't I bind to another port and still ...more >>

Hi, can I create a instance from a class which is another assembly and call a function inside this assembly? I know the assembly name, class name, the function name and its signature. Thanks Christian...more >>

Is there any way for .net to get the name of the changing entry of registry in real time? We want to monitor the whole registry and be notified when there was a entry is changed on time. We also want to know the name and path of the changed entry. how can i do this? we appreciate ur hel...more >>

Hi, I have a list of different objects in a <List> Structure. There is only one category of each kind of object. Current I have the following methods: public static Flag GetFlagObj() { foreach (Thingy s in _Thingies) { if (s is Fl...more >>

VS.2003, .NET Framework 1.1, C# My goal: Creating a dll (helper.dll) which contains some UserControls and some other helpful classes in order to use it in other projects. Symtoms: The inital use of the UserControl component works. However, if the Helper Project is recompiled, the UserC...more >>

Dear All, I am deploying c#.net windows application in client machine. it is working fine. but, When i run the same application from a network path, it is throwing 'security exception'. in dot net framework configuration , what settings i've to chang to work the application fine? Th...more >>

hey guys, i'm trying to generate a crystal report based on data in an access database, but i keep on getting this error: "Error in FIle c:\......\CrystalReport1.rpt. Buffer too small for string or missing null byte." Any ideas??? cheers Steve ...more >>

How to check if a file path is correct? Hrcko ...more >>

Hi, My project is .Net 1.1 C# Windows Form project, and the database server is SQL Server 2000. In one of the database's datatable MyTable, the Primary Key is a Join Key [Name, Number]. Now in my C# Windows form MyForm, it is designed mainly for manipulating the datatable MyTable. I am t...more >>

Hi everyone, I have a question that I hope can be answered. Is there a way to create a borderless form, that has no backcolor (transparent) that has a label (with no backcolor) that is showing? In other words, is there a way to have text on a screen with nothing behind it? Some people ...more >>