Respected Sir What ever you have explained on WebRequest and WebResponse I came to know very well.I started to implement a project based on this concept.What i did was 1. I used Webrequest to hit the starting page of the website to get the Cookie value(www.ichotelsgroup.com) (I am gett...more >>

How can I write a newsreader in .NET? ...more >>

i am newer to c# programming. i found most of the example of database accessing do not mention that whether the system release all the resources such as sqlconnection, sqldataadapter. and i made a program that use Application.Exit() method to quit the program.Can you tell me dose it can couse...more >>

I wish to receive some data from SqlServer as XML and write out result to as a string. Eg: cmd = new SqlCommand( "select * from blah for xml auto", con ); XmlReader result = cmd.ExecuteXmlReader( ); Console.Writeln( result.ToString( ) ); This XML is meant to be the input for an XSLT tra...more >>

I wrote a program that made some combinations and add them to a listbox, and i need to save the contents of the listbox every 1 minute... The method that save the content of the listbox i have already wrote, but i´m having problems making a timer to save that... Do you all have an idea how i...more >>

Who can tell me the mechanisms of CPU time-slice allocation among processes in Windows 2000? Any difference to UNIX? I wrote an application on the console but found that it was running very slowly while the console's windows was not put on the top. What are the differences in the CPU time-slice all...more >>

Right now I develop an application to retrieve over 30,000 records from a binary file and then load them into a SQL Server DB. So far I load those records one by one, but the performance is very poor: it takes more than 6 hours to finish the loading. So could I make use of the bulk-insert mechanis...more >>

I'm writing a program that calls the Windows Terminal Services API WTSEnumerateSessions. It works well for servers that I have "Query Information" rights to, but for servers that I don't have those rights to it takes up to 10 seconds to send a response. I'm testing with 70 servers right now, a...more >>

Hello, this may seem a strange question, but is there a way of being able to call methods of a class through an array of that class when not referencing a specific object in the array. In other words, defined a class class_A I'd like to be able to do the following: // defining an array of ...more >>

I am trying to convert the following VB.Net code to C# and I am getting the compiler error: VB.NET code: '' Create a delegate that will be called asynchronously Private Delegate Function GetTextData(ByVal DatabaseName As String, _ByVal ProcName As String) Dim async As New GetTextData(Add...more >>

In VB6, we could save some files as templates for reuse in the future I wonder if there is similar approachs in VS.net?...more >>

Hi! Here is what I'm trying to do: I have created a UserControl named PictureView. It holds all the images in one directory in the Bitmap[] images variable. The selected image is displayed in the PictureBox control. Here is how it works. 1. I get all the filenames of the images in the ...more >>

I want to overload the + operator for ArrayList for adding elements public static int operator +(ArrayList l, Object o) return (l.Add(o)) First I have discovered that the return value cannot be void and if I change it to something like int, I have to always write like this int i = list + 3...more >>

What is the namespace of HttpChannel type in VS.NET 2003? I'm using System.Runtime.Remoting.Channels.Http, but there is error while compiling. Error Message: "The type or namespace name 'http' does not exist in the class or namespace" ...more >>

Hello NG, I want to know if there is a c# method that allow me to post some values to an HTML page. What I mean is that: I have a c# form with some textboxs and a button. what i want to do is: fill in these textboxs, click the button and send the values to a dynamic web page using the post meth...more >>

Hi, I'm having several memory leaks in my Windows Form (C#). Testing, I found a curious thing: Put a ListView control in a Windows Form, run the project and start the TaskManager. Each time you focus the form or pass the mouse in/out the ListView, the memory used by the application ...more >>

I am messing around with performance counters to try to learn how to work with them. In VS.Net, I can see that there exist a Performance Counter with a "CategoryName" of "Browser". My application allows the user to key in the "CategoryName" and then if it is found, builds a ListView with...more >>

Form1.WindowState = (FormWindowState) rows[1]["AttributeValue"]; hi i get the following error when i try to do the above . why is taht? thnx ...more >>

I have a small project that I'm writing to help me learn C# and the .Net Framework. This project is a WinForms program with multiple forms that accesses MSDE. I've got most of it done but I've hit a slight brick wall. Does anyone have any recommended strategies for dealing with application ...more >>

How do I set a column in a datagrid as a combo box? Currently ploughing through the .net help files but can't find anything on this topic. Cat ...more >>

I try, but i cant serialize Color field when serialiazing class that contains it! How to do it? Heres how i do it: //Class to serialize public class Colors { public Color Back; public int LineWidth; public void SetToDefault () { Back = Color.FromArgb (255, 192, 192); L...more >>

If you have a datagrid with an underlying dataset and rows are added to the dataset during a program run, how do you get the datagrid to update itself to repflect the changes in the underlying dataset? I've tried Update() and Refresh() but these don't seem to work. Only thing that works is rebind...more >>

I've run into something that doesn't make a lot of sense and I'd appreciate if someone could explain the logic. Let's say I have: internal interface MyInterface { void foo(); } internal class MyClass : MyInterface { internal void foo() { Bar(); } } I get an error ...more >>

Hi, Does somebody know how to obtain the file attributes of a file that is on a website? Specifically, I need to know when it was created. For example, this file: http://www.metalix-cad-cam.com/Downloads/SP/MACHINES.INF Regards, Ram. ...more >>

I am new to C# in C++ you can use vectors to handle a unknown quantity of set of objects. But in C# not sure what to use. As I tried arraylists but they can hold a variety of objects. So when I try to use functions that go through (eg. for loop) of group objects (eg. Cars) and get their...more >>

I'm studying the designer in .net frame, and met many new things such as System.Windows.Forms.DesignerFrame, System.Windows.Forms.FormDocumentDesigner, but I can't find anything about it in MSDN. Do you know how to get the article about them, how does the .net Frame Designer work, and how to dev...more >>

I am working with a project which converts a java based application into C#. I noticed that when I converted the java file, .net throws a SupportClass for me and since there is no List type in C#, SupportClass tries to use ListCollectionSupport instead. This is working great, except one situation,...more >>

Hi all This may seems like an od subject. I would like to know if you can apply some sort of "stylesheet" to winforms? like in ASP.NET you can define .css files to determine your look and feel of your HTML web pages. the obvious advantage of using HTML stylesheets is that all your buttons, dr...more >>

Hi, I have created an array of Objects in a collection. I was wondering is there a way to destroy the array to free up the space in the memory ? or they are automatically destroyed and garbagge collected by .Net framework? Sarfraz ...more >>

1) When you select the "absolute" end of a richtextbox (go to last character, hold down "shift" and click right keyboard button), the font changes to the default of the richtextbox. How can I set this so that when the user changes font, if its the end of the rtb, this font changes as well? 2)...more >>

TreeView Control: If I click using left mouse button on a TreeNode it gets blue and SelectedNodeproperty is Changing - Ok. But if I click on it using right mouse button node is getting blue but SelectedNode propery is not changing. So user think's trat he is on node f.e. 3 cause it's color is...more >>

I have a richtextbox which I want the "literal" rtf of. richtextbox.rtf returns {\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1033\\uc1 }\r\n\0 when i put this into a string I get "{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1033\\uc1 }\r\n\0" I want this to be @"{\\rtf1\\ansi\\ansicpg1252\\deff0\...more >>

This should wotk I think but its not trapping the Insert or Delete key??? Do I not have this written correctly? if (e.KeyCode == Keys.Insert) { MessageBox.Show("Pressed " + e.KeyCode); if (e.Control) { MessageBox.Show("Pressed " + e.KeyCode); } else if (e...more >>

Hi there, I have taken over this project from someone thats left the company. There were about 5 other projects included in the solution explorer and every time I opened the project, something was trying to connect to a SQL server machine that no longer exists. Because this was taking so lo...more >>

If I open my asp's file with .net editor,it will open a development environment widow.If I open another file,it will open the 2nd winow.I want opening two or more files with the same window,only open the editor one time. How to do I can? Thanks! ...more >>

Hello, All I am new to improving user interface. I have some questions for all the experts here who could help me out in this aspect. Now, I am in the early stage of developing a new user inteface for a computation intensive application program which has a character-based user interface now. The ...more >>

Hello all, I have a C# class (in this example, called A) that, in its constructor, starts a thread with a method of its own. That thread will be used to continuously check for one of its object's state and generate classe's A events "Connected" and "Disconnected". It looks something like th...more >>

Hi All Trying to retrieve the value of the Sqlcommand' parameter as integer. Here is how I declare it: SqlParameter paramId = command.Parameters.Add("@id", SqlDbType.Int); paramId.Direction = ParameterDirection.InputOutput; paramId.Value = id; ...... The only method of the SqlParame...more >>

I'm a novice programmer just beginning to learn the new C# language. I'm a bit confused about the way Inheritance and Interfaces are constructed in C#. The following examples may help clarify my confusion: interface IControl { void Paint(); } interface ITextB...more >>

Platform: Windows 2003 Server (MS SQL Server 2003 SP3) Language: C# Problem: My stored procedures times out randomly, some proces works fine when using them from C#, and some generate SqlException which states that the server has timed out. The problem isn't in server, neither in stored pro...more >>

Hi, im trying to upload somefiles using sockets to a FTP site. But i've some problems with extended ascii characters. When i try "MKD bülent" the created folder is "blent". The directory name is kept in a string. What should i convert its encoding to? If you have any idea to solve this, ple...more >>

I need a function or component ( free - with source if possible ) to convert images like BMP, JPG, etc into wbmp. ThankZ... Genival - Sao Paulo - BR ...more >>

H How I change the appearence or boarder style of a combo box control in C#?...more >>

Staying in managed code, what is the best way to get the temp directory in C# .NET programming? I'm currently using this: public static String GetTempDir() { return Environment.GetEnvironmentVariable("TEMP"); } I wonder, is there a better solution? This one feels a little system and OS...more >>

I am new to .Net and have a requirements for a project that we zoom a grid control when it's clicked. This grid will contain a yellow pages like listing and be displayed on a form with other grids in a table like format. Does the grid control support zoom? Can anyone suggest a way for me t...more >>

Hi, everything works apart from the last line :-(( rng.Value2.ToString() An exception is thrown : "Old format or invalid type library" It gets compiled though (so he recognizes the property 'Value2'). So I suppose I'm using a incompatible type lib. I'm using Excel 2002 : Excel 10.0 O...more >>

hi, i'm using ms visual studio .net 2003. i created a new c#-project "smart device application" for pocket pc. next, i wanted to insert "windows forms" "monthcalendar", but in the toolbox, section "windows forms", every item is deactivated (shadowed). does anybody know, how i can ac...more >>

Hello Can someone please tell me what I'm doing wrong? I'm writing an application that should be using callbacks to perform asynchronous calls to the Win32 API. Problem is it never reaches my callback function. Any feedback is appreciated. Also, any references to websites with examples of ...more >>

h I am using a datagrid control. I am displaying some controls like Date Time picker, combo boxes, ect in some cells.When a particuler cell is got focus the control is displayed and user select the value from combo or from date time picker control.When the focus is last the control disappeares and ...more >>

I'm trying to execute this simple query: ObjectQuery objectQuery = new ObjectQuery("Select * FROM Win32_Volume"); ManagementObjectSearcher searcher = new ManagementObjectSearcher(objectQuery); ManagementObjectCollection moc = searcher.Get(); try { foreach (ManagementObje...more >>

Hi. I need help. How can I assign one array to another by reference from current position? (I prefer managed code) For example in C int a[10];int b[5]; .... a=&b[5]; Thanks in advance!...more >>

hi I have created a class with a simple indexer what is the syntax for adding the function "Remove" ... myClass.colors["a"]=Color.Black; // WORKS O myClass.colors["black"].Remove(); // ?? .... ColorCollection _colors=new ColorCollection() public ColorCollection Color ge { return _...more >>

Ok, I have a proxy server written in c#. Because I'm maintaning two versions (a console application for debugging and a windows service for deployment) I got the console application working, then I added a service and wrote the service. However, I can't seem to figure out a way to actually c...more >>

I don't understand why the ArrayList's Add() method is public virtual, but the array of items that the ArrayList uses is private (the variable is 'object[] _items' in the ArrayList). This makes it impossible to re-write the Add() method in a class that derives from ArrayList. I have this type ...more >>

I am drawing in a picturebox and am having some problems. I display outputted images in the picturebox. If the image is too big for the client area then i have scrollbars. The problem is that once i draw a bitmap to the picturebox I have trouble displaying graphics inside the picturebox. I p...more >>

I'm a novice programmer just beginning to learn the new C# language. I'm a bit confused about the way Inheritance and Interfaces are constructed in C#. The following examples may help clarify my confusion: interface IControl { void Paint(); } interface ITextBox: IControl { vo...more >>