C# / C Sharp Forum

Hi, I've got an application which is written in .Net 1.1. When I try to write a varbinary(max) field using the SqlCommand and SqlParameter classes I got an exception like this: "The conversion of varchar into varbinary is invalid". When I remove this field from my update statement, everything works fine. The SQL paramter got the the...

Necesito que mi aplicacion (ASP NET - C#) envie un net send a determinadas maquinas de la red y no encuentro como hacerlo. Gracias

I have a regular expression that catches these patterns: value1 - value2 value1 - value2 (value3) value1 - value2 value1 - value2 "value3" As you can see value3 is always optional. The regular expression I use is:

Hi, i TRY to create a windows apllication that insert in a Access DB name and surname; the Insert istruction Works but the the refresh of DataGridView doesn't works... the code is : public Form1() { InitializeComponent(); } #region Variabili

Hello guys........ please tell me ............. I want to do email validation like i have a userid entered by user new user.so problem is that i have to do the validation when i'll click on save button b'coz userid should be unique.....

I need some information on guidelines on how to use XML comments in c#. Please suggest some good articles or books.

It will show the reference page when I right click a web project and select it's property page. There are some reference types: BIN, GAC What is the difference between these two types?

I'm not very familiar with C#. I have a static class and would like to define some constants similarily to Math.PI. Could someone show me how to go about doing this. So far no luck searching. Regards Chris Saunders

Hello, How do I select 10 random records from a table? Thanks, Miguel

I am trying to figure out how to make an object instance available for all methods of a class. I tried to do something like this: public class test { TheObject Instance = new TheObject(); TheObject.Dictionary<string, string= new Dictionary<string, string>(); .... } The first line (TheObject instance = new TheObject();) doesn't get

Hi, I have a .NET / COM DLL. On the client the COM object is created by a application using VBScript (Windows Scripting). I try to deploy the .NET / COM DLL using ClickOnce deployment. I know that it is only possible to deploy a Windows Forms - no DLL. Well, my idea is to deploy a "dummy" Windows Forms app, that references the .NET / COM...

Hi, all! Some weird thing happens... I'm trying to create a shortcut programmatically in C#. I need to create a shortcut with the "target" parameter using slash. Actually I'm creating a shortcut to a file using command line arguments, smth like: "C:\PATH\MyFile.exe" /param1 The problem is that when I create a shortcut the regular slash...

I have an application that uses the system.io.ports.serial class to receive data from a serial device. The device is sending a data stream of stx then 15 readable ascii characters then a cr. My datareceived event looks like: int iBytesToRead = com.thePort.BytesToRead; string data = com.thePort.ReadExisting(); // Make sure we are...

So I have this perfectly fine and running app, that uses managed C++ forms. Problem#1: I pass a Bitmap reference to a class, hoping to modify it in one of the class's methods, so it reflects outside too. Something like this:

Hi, VS2008 IDE Desktop app. Anybody out there deploying this db? I am finding a strange problem with column names. I am using an SQLCeCommand to create a datareader. I have a where clause that is refusing some of the column names. Saying the column name is not valid. The columns are visible in Server explorer.

Hello! I'm reading in a book about .NET and here they something that sound wrong but I'm not abolutely sure. They say that a DataSet contains methods to update data in the database is that really correct ? I have looked in the documentation for DataSet and it seems that there are no methods or propery that can be used to update the...

A windows service I've created runs on all boxes except Windows 2000 server. The windows service initializes (i.e., the Service:ServieBase class gets constructed), but the OnStart() method never fires. On the same server, I have another service I've created which runs just fine. Both services were installed using the Windows Installer,...

I need to use lambda expressions or other way to specify default query for dlinq entity type. Code below causes compile error shown in comment. How to fix ? Maybe to use ? Andrus. using System; using System.Linq;

Hello! How does this connection pool function actually ? As I have been told is that when the connection is returned to the pool the connection to the database is still open. What you do is that you just return a still open connection to the pool. When I open a connection I get an already open connection to the database. Is this correct...

You wrote a great deal and there is so much I would have liked to elaborate on but this really de-railed the whole debate. You posted that linq DOES throw an exception if its not ordered, and that runs contrary to my experience. On Apr 21, 1:26 am, "Frans Bouma " <perseus.usenetNOS...@xs4all.nlwrote: We wouldn't be having this...

Hello All, I need to integrate my application into Active Directory. My application has the concept of groups, users, and also individual permissions. Users can be part of a group such as administrators, but explicit permissions may also be set. Can active directory handle this too? For example: Administrators can typically...

Is there an easier way to determine if a specific assembly is loaded into the current AppDomain? I'm thinking that there has to be a way to do it without looping through all currently loaded assemblies, yet I couldn't find how to do it without looping. This is what I have: private bool AssemblyIsLoaded(string pathToAssembly)

Hello! A DataSet is using XML to represent data that is stored locally. I just wonder how can I look at these XML data that describe the DataSet? //Tony

Hi, just learning extension methods and the first parameter confuses me. I understand using the this keyword to indicate the class we wish to extend, but is the first parameter also used to catch something passed ? Or is is it just to specify the class we wish to extend? the reason I guess I'm confused is because sometimes a see a variable...

Hi there, since < has a meaning in c# for regular expressions and \< says it's an unrecognized escape sequence, I'm pretty lost parsing html tags without replacing them first with another character or string. Does anyone have a hint for me on how to get c# Regex class to find "<"? Thanks in advance,