Hi there, I want to test a String. This string must be made of - 8 numbers - then a single underscore - and then 6 numbers Can anybody tell me what can be the right .Net pattern ? String sample : "20041224_235959" (latest christmas) "20011109_140000" (9/11 crime - CET) "19891009_180...more >>

I'm using the System.Drawing.Bitmap class for loading a 32-bit bmp file which includes an alpha channel. The problem is, when it gets loaded (just using the Bitmap(string filename) constructor), it doesn't bother bringing the alpha along with it. All of the pixels just show "255" as their ...more >>

Hi all, I have developed a windows service using the windows service project template in VS.NET. I have used three controls in the service, a timer, performance counter and a message queue control. The service will "sleep" for 'n' seconds using the timer control and whenever the timer_ela...more >>

Hi C# experts, I am to C# and .NET. I am writing a database application using C# and Dataset. In Sql server, I have a Acount table which contains over 100,000 records. This table will be accessed and updated by many users at same time. So the data in this table keeps changing and growning....more >>

I'm trying to automate excel from visual c#. One thing I need to be able to test is if excel is even installed on the target machine and what version of excel is installed on the target machine. Is there a way to do this via c# code? Thanks. Mansi...more >>

Hi, I'm learning to use NDoc.. I'm facing a strange problem, well .. at least for me. I could not find the XML file. I'm able to generate XML comment web page though. How can we generate XML file from C# code comments so that we can use the XML file in NDoc.. I'm usin...more >>

Ok, first of all, let's get the obvious stuff out of the way. I'm an = idiot. So please indulge me for a moment. Consider it an act of = "community service".... What does "64bit" mean to your friendly neighborhood C# programmer? = The standard answer I get from computer sales people is...more >>

Hello Everyone, Is there anything wrong with this block of code? ArrayList arr = new ArrayList( 33 ); for( int i = 0; i < 33; ++i ) { arr.Insert( i, new MyObject() ); } It's so strange that when my web application have another thread allocating and deallocating bit junks of memor...more >>

HI, Stupid question - how do you insert a new line symbol in a multiline TextBox? I try a standard textBox.Text = "Line1 \n Line2"; but it doesn't work, i see "Line1 Line2" and a "square" symbol between them Thank you, Andrey...more >>

In Amit Kalani's book (0789728222, 70-315 exam prep. book) he says that: "a delegate is a special class whose object is capable of storing references to methods with a particular prototype" elsewhere (in C# books I'm studying) the term used is signature. Is it signature or prototype or ...more >>

Hi, I've a com dll developed in VB6. I want to use this dll in a C# application. I set the references to that control and created an instance of the class set to a variable. But when I call a property in that class I get this error : Property, indexer, or event 'SourceDatabaseConnectionS...more >>

given a Hashtable and an Index, how do I retrieve the key? Hashtable h = new Hashtable(); h.Add("red", 3); h.Add("blue", 99); h.Add("green", 33); how do I get the key at index 2? h.Keys[2] should equal "green". thanks, -Andrew ...more >>

I can't find this answer anywhere! I am making a class that inherits from StatusBar control and I want to convert this function to C#... Private Sub Reposition(ByVal sender As Object, _ ByVal sbdevent As System.Windows.Forms.StatusBarDrawItemEventArgs) _ Handles MyBase.DrawItem...more >>

I like richtext textbox and its shortcut, but I don't need the richtext format. How do I tell the richtext text box to strips all the format and convert everything to plain text? Thanks ...more >>

Hi All, I'm trying to create XML commenting for my code using XML commenting feature for the first time. I'm using VS.NET 2003 and C#. I'v tried the following way. Step 1: set the file name for xml file in "Project Properties | Configuration Properties | Build | ...more >>

Hi, Could someone pls help me here: If i use async sockets in the separate thread like this: void ThreadFunction() { ..... 1. MySocket.BeginAccept(AsyncCallBack(OnConnectRequest), MySocket); 2. ?????????? } What do i do after line 1? Do i put an endless loop in order to keep the...more >>

Hi, I have a program where I load images to a screen. How would I go about determining the size of an image prior to loading it on the screen? Thanks, Tim ...more >>

I would like to create my own command prompt application using .NET. I'm looking to start off with a basic framework, essentially passing commands through to cmd and displaying the results. However, I'm stuck on creating even the framework. The approach I've been looking at involves using a p...more >>

I've been working on an application which has a NotifyIcon (system tray icon), and a corresponding ContextMenu. I want to be able to update this menu dynamically. However, when I make changes to the menu, it seems to disappear. This only breaks when the context menu is tied to a NotifyIcon - ...more >>

Hi all I have to use unmanaged COM from .Net environment. This component does some calculations on a two dimensional array of data and returns another two dimentional array of processed data. I've added a reference to this COM. Then I've instantiated an object of its type. Now I want to call a ...more >>

Hi, Sorry for a repeated post but i didn't receive an answer and will try to re-phrase my question: How do i close an additional thread from the main thread, if this additional thread is stuck waiting for a blocking operation, eg. if in this additional thread i wait for a Tcp connection: ...more >>

Hi all, I could use a little help. I am trying to customize a displayed value in a dataGrid. What i would like to do is create a IFormatProvider that will set my column to be displayed in terms of 100, where 100 = 1. I have not been able to figure this one out. I have been messing around w...more >>

Hi all, at the moment i am developing an app which is sort of an interface to copy data from one database to another and it shall run as a service. As there are several databases the app must be installed and run in multiple instances with the configuration data (database, login, etc.) sto...more >>

Hello guys. I have a problem with a topmost form. I am writting in C#. I have Mdi Form wich has 2 child forms. I want to set one of them as a topmost window, but when I sets MdiParent the TopMost property does not working. How can I set the one form as a topmost? Can anyone send me code ex...more >>

As a Listbox.item, rather than using a string I'm using a ListItems object, overriding the ToString method When I add items to listbox.items, my strings are shown correctly. On the otherhand, when I update the "value" field the listbox doesn't update to reflect the new value. What do I need t...more >>

Hello, When do I need to use the Clone function? I am aware that instances that inherited Forms.Control will somehow be of reference types instead of value types. I have tested that ArrayList behave the same as well. Anyway that I could know when I need Clone when I do not want to m...more >>

Hello NG ! I would like to test, if a file in my subtree is allready in use by an other application. Do anybody know how to get this information ? It is possible to get this information ? Thanks and regards. Marcel Hug ...more >>

I try to use C#.net to build a multimedia search engine which will intergrate with google api to get the results. Visual studio.NET is my development enviroment and ASP.NET web application is my visual C# project. Where can I find the sample C# codes for this kind of web application development...more >>

I'm using File.Exists to test a file on my C: drive. My program was strongly named and had caspol -af run on it to allow it to run from the network. There are 3 ways I am doing this: 1) Run from my C: drive, File.Exists works properly and says C:\Temp\test.txt exists 2) Run from my H:\ (...more >>

I wrote a little c# app to send SQL queries to a iSeries 830 and return the results in a data grid. Now I want to create a deployment program. It's using the iSeries DB2 Provider for .NET which is part of a CD install. The key DLL is: ibm.data.db2.iseries.dll I created a Setup pr...more >>

Hi, I am working on a dotnet url rewriting mechanism that has to be able to deal with urls containing non-standard characters, eg http://www.mysite.com/Télécharger. The problem is that some browsers will encode this url using utf8 & some using ISO 8859 (I *think* those are the only two poss...more >>

I'm writing a webpart which is supposed to connect to a Webserice in our interanet.I am using "RSService.Credentials = System.Net.CredentialCache.DefaultCredentials;"to Authenticate to the webservice.but it dosn't work.why? I think SharePoint which hosts my webpart authenticate the user requ...more >>

I have applied this code myMessage.To=MessageTo; myMessage.From=MessageFrom; myMessage.Subject=Subject; myMessage.Body=Body; myMessage.Priority=MailPriority.High; SmtpMail.SmtpServer=SMTPServer; but I keep getting back the error message "Could not access "CDO.Message" object. What am I mi...more >>

I'm trying to pass a filename, obtained with using the fileName property from the OpenFileDialog, as a application parameter in Process.StartInfo.Arguments and run a MFC/C++ application using the Start method. When I hardcode the application parameter such as "/name=c:\\myFile.txt" all is wel...more >>

by reflection I can infer that a property is Array type. But how I can get the type the array is composed from? for instance: string[] table; I want to get String and not Array thank you ...more >>

hello, My project in a web project. I choose to use singleton in one of my projects. Towards the end I realise that I seemed to have refered to the fields singleton in my other classes in my business logic a little precariously. I access my the fields in the singlton in my BLL classes directl...more >>

Hello, Is there any better collection than HashTable in terms of performance, when the type of the key is integer? Regards, Sreekanth. ...more >>

I want to convert a double value to string. 1.2345678911 -> "1.234567891" 123 -> "123" I used the following code to convert it: string str = doubleValue.ToString("f9"); but the second value is converted to "123.000000000". So I changed the code to: string str = doubleValue.ToStr...more >>

Hi, I'm looking for some code to monitor for when an external drive is connected to a computer (USB ThumbDrive, External Hard Drive, etc.) and is assigned a drive letter. I'd want my code to trigger off of the mounting process so I can search for a specific file on that hard drive (which is...more >>

Hello there, I have a function to parse csv data and then create an xml file out of it. Here's my function private string delimtedDataSet( string strDelimiter,string strpath,string outpath) { DataSet oDs = new DataSet(); DataTable oTable = new DataTable(); DataRow oRo...more >>

I am trying to call a static method within a sealed class. However, the wrong method keeps getting called instead. In a seperate class I am calling the following code: LogHelper.Log("Sample Exception", ex, LogLevel.ERROR); Here is the weird thing, the public static void Log(string message, ...more >>

Hi All, I'm looking for a good paperback resource on the System.Drawing objects. I'm looking to create graphs and convert graphics from one type to another. Any Suggestions would be helpful. Thanks in advance ...more >>

Hey, I have a XML Schema, and a XML file. How can I validate that the XML file is implements the XML Schema meaning that it is build correctly Thanks ahead --Ram ...more >>

Hello Everybody, Please guide me so that I can fulfill this challenging assisnment ... I have been asked to "Restructure a Windows application" from scratch in 2 months. The existing application which is working but it is very heavy as no proper application architecture and layering has been...more >>

Hi, I want to do the following: I have to XmlSerialize a HashTable, but since it inherits from IDictionary it cannot be XmlSerialized, and I prefer not to make my own implementation of IXmlSerializer. So, I make two arrays, one containing the keys and one containing the values, and I wo...more >>

How is it possible to call the WScript object? I haven't found it in any namespace... is it only for VBScript? If yes, is it possible to launch a .vbs programmatically from c#? Thanks, Daniele...more >>

I am currently in the process of developing a transaction loading service which parses an xml file and loads these transactions to a Database. The problem i am having is if i try to process the same file twice (accidentally copied into the listening folder twice) then the transactions are ins...more >>

For limiting access to the database to strictly necessary I try to filter the query by using DataView. Thw DataSet ds contains three columns (fields) : (LAND_ID, Landcode, Landnaam) and four rows. I try to filter out only one country (key is LAND_ID) with the following code: DataTable dt =...more >>

Hello, I use c# to start excel and to get numberformat of active cell. VBA outputs results as expected, but via c# i get result 'Standard' instead of 'General' for a call to numberformat. Why? It look's like 'numberformatlocal' is returned instead of 'numberformat'. Output of C#: Numberf...more >>

I am trying to update a field of type IMAGE. I am able to do this by deleting the record and then INSERTing a new record as shown below in the commented section. But I really want to do this with an UPDATE command as shown below in the un-commented code. I assume this is possible. The ima...more >>

Hi, I have the following code: public enum MyColors { Red, Green, Blue } MyColors c = (MyColors)Enum.Parse(typeof(MyColors), "abcd"); Why do I get c = "abcd" after this code instead of getting a ArgumentException ? MSDN says that this expetion is triggered when value is a name, but not ...more >>

Hi, I would need that when i click the button the code of the Onclick method executes first, and then the onInit Method... Its possible make this? -- Thanks Regards. Josema...more >>

Hi all, I need to highlight textbox in a Form when they are selected. In order to do it I have added for each one a .GotFocus and .LostFocus Event Handler.... textRS.GotFocus += new EventHandler(gotFocus_Event); textName.GotFocus += new EventHandler(gotFocus_Event); textSurname.GotFocus +=...more >>

I've configured a RangeValidator control on a WebForm, using ASP.NET, and have set the type to string, the max value to 100, and min value to 1, however, the control to validate always throws an error, regardless of the length of the string. For example... <asp:textbox id="txtQuestion" run...more >>

Interesting little problem; go easy on me because I'm just a humble scripter turned c# developer. I've a class UserList which I auto-generated with a python script, it extends CollectionBase and has the usual methods: this[int index], Add, Insert, Remove and Contains. There are no differences ...more >>

HI, As i posted below i have an app with a separate thread listening for a tcp client connection. In the simplest way it looks like: void ListenerThreadFunction() { TcpListener l = new TcpListener(IpAddress.Parse("127.0.0.1"), 8080); l.Start(); Socket client = l.AcceptSocket(); clien...more >>

I have a chart with data and I want to add a scroll bar there but to do a paging - each time I move the scroll bar to add a data (to divife all the data untill all of it will be presented) What is the best way to do it? Thanks a lot!...more >>

I'm not sure whether I'm doing something wrong, or StrongNameIdentityPermission just doesn't work in 2.0 beta 2 yet. public class Class1 { [StrongNameIdentityPermission(SecurityAction.Demand, PublicKey = Keys.PUBLIC_KEY)] public Class1() { System.Diagnostics.Debug.Ass...more >>

HI, How do i get a remote TcpClient address here? // ======================================= TcpListener l = new TcpListener(IPAddress.Parse("127.0.0.1"), 8080); TcpListener.Start(); While (true) { TcpClient cl = l.AcceptTcpClient(); <Here i need to get the client's ip address> }...more >>