I need to get the position and also seek in a network stream, is there an easy way to do that? (I am converting some java code so thats the easy path). ...more >>

Is there something special I need to do to send data to a multicast IP and have it go across a router? Router is a Win2000 Server connecting 2 networks via RRAS PPTP. The routing appears to be working because I can ping the multicast address and get responses from the server on the other netwo...more >>

I'm using the (managed) Microsoft.DirectX.AudioVideoPlayback namespace to program an app where I want to quickly swap the video that is being displayed, playing the new video from the position where the old one left off. Here's a sample of the relevant code: // when this code is executed t...more >>

I'm sure this has been asked a million times, but I did a search and didn't see anything. I have a socket in my form and I call MySocket.BeginReceiveFrom to listen for incoming data asyncronously. How do I cancel it so I can close the application. I call MySocket.Shutdown(SocketShutdoen.Both) ...more >>

I have a string assigned a value from a querystring public string a = request.querystring[1] how can i make sure string a is less than 250 char? without using if's aaron ...more >>

I have written a little programm, which converts normal Text into Unicode Bytes - nothing special, but i tried to creat 2nd Encoder which converts strings(numbers) in a textBox (strings which i had converted from UnicodeString to Bytes) to a UnicodeString. <textbox Text : 0770> ->>> byte[] <--...more >>

I'm using Reflection to obtain data about a given objects public properties. I need to perform different actions depening on whether a properties class type is derived from one of the collection classes or not. Take the following theoretical classes: public class MyClass { private int F...more >>

Hi, I've been using CodeDom to generate and compile source code... .....but, have found that in the CodeBinaryOperatorType (used when making a CodeBinaryOperatorExpression), there is no "not equal" .....there are the usual, equals, greater than etc...but no, not equals. I would have thought...more >>

Hi, How do I change the backcolor of a control at run time. I know I can do this: .backcolor = Color.Yellow. But what if I want to use color #ffffffcc? TIA ...more >>

Given a short string that should only contain an (integer) number, is there a way to filter out anything that is not a number? Many thanks. Patrick. ...more >>

How to put an application in systray with F1 or any shortcut button? ...more >>

hello, how can i have multiple datarepeaters on the same aspx page? i have tried something similar to this: <asp:repeater id="repeater1" runat="server"> <itemtemplate> <td>text</td> </itemtemplate> </asp:repeater> <asp:repeater id="repeater2" runat="server"> <ite...more >>

When I unload my appdomain, I got the following exception: A blocking operation was interrupted by a call to WSACancelBlockingCall: ..... My appdomain uses remoting... From previous post, I know that I should call "RemotingServices.Disconnect" to close the remoting channel while unloading m...more >>

I need to change the paging buttons in my C# web datagrid from "previous" and "next" to something like "Records 10-20 of 100", etc., depending on which page the user is on. Any ideas? Thanks, Dave ...more >>

hi, how do i chk if a column in my dataset is null? ...more >>

Is there a 'best practice' methodology for storing and retrieving configuration data in C# Windows Forms applications? I'm talking about the sort of stuff that went into INI files in the old days. I'm planning to create a class to hold initialization information, then serialize the class to th...more >>

I have the following need for a custom control. Two columns, n rows. Column 1 is simple text (non-editable). Column 2 is drop-down combo boxes (1 for each row). Needs to be sortable (with column headers). I'd prefer the second column to not display a column of combo boxes, but rathe...more >>

hi, can anyone explain to me how application blocks differ to references. from my understanding an application block is a reference to a pre-compiles bit of code, (which is what a reference is). thanks in advance. ...more >>

Hi, I use the following way to write to the Windows Event Log from my C# application. EventLog eventLog = new EventLog(); eventLog.Source = "My Source"; eventLog.WriteEntry("Just a test:",EventLogEntryType.Error); Initially i was using 1.0 framework with VS 2002. It wrote "Just a test"...more >>

hi i have an arraylist that has doctor objects with various properties, members and methods. i want to enumerate this arraylist object. but i dont understand how. this is what i have done ArrayList arrDoctors = Doctors.GetAllDoctors(); for (int cnt =0;cnt<1; cnt++) { Doctor p = ...more >>

Ok. I just downloaded and installed the MS .NET SDK 1.1 (~120MB). However, I can't seem to find the csc.exe or vsvars32.bat? I searched for those files but they're not on my PC. I thought the command-line c# compiler comes with sdk 1.1? To C# or not to C#. That is the statement. *** Sent ...more >>

Is there anyting in C# equivilent to the VB.NET module? ...more >>

I am in a situation in which I am recieving a DirectoryEntry that may or may not be already be disposed. I need a very fast, (from a code point of view not necissarily a coding point of view), way of testing if it has been disposed. Currently I have: try { string Junk MyDirectoryEntry...more >>

I am relatively new to .Net and C#, but I hav ebeen programing in other languages and done some COM work for a number of years. I am attempting to understand how to map an older program architecture into .Net -- not looking to do it at this time, just to understand how I would achieve it. In t...more >>

hi public string LastName() { get //ERROR HERE { return this.lastName; } } this code gives me a compilation error. says : ; expected what am i doing wrong.? ...more >>

hi what is the difference between virtual / override and new? until now i only knew the virtual / override thing. thanx for hint. Jazper //--- new ---------------------------------------- public class MyBaseA { public void Invoke() {} } public class MyDerivedA : MyBaseA { ...more >>

Hi, I have a project with 5 Classes. PMAIN ist my main class, where I make instances of all the other classes. The Class ENVIRONMEN, ROOM and CHARACTER are instanciated only one time !!! Many methods in all these classes need to be some instances of the other classes as prameters. e.g. my...more >>

I'm going absolutely insane trying to set this thing up.... I've read a tutorial on setting up these controls and I understand you need to have a design time version and a run time version My run-time version is fine and was working perfectly by itself, until VS decided to go spastic and started ...more >>

Hello! I need to conver string (sql statement) from one Polish charset standard (ISO-8859-2) to another (Win-1250). Using help I managed to create line like this one: sql=Encoding.ASCII.GetString(Encoding.Convert(Encoding.GetEncoding("ISO-8859 -2"),Encoding.GetEncoding("windows-1250"),Encodin...more >>

Hi, I've got a DataSet (ds) which was created by a DataAdapter (da) method: ds.Fill(ds). This DataSet is passed through various methods (by value). Each method changes some fields in the DataSet (for converting data in another format). As this DataSet is _not_ class-wide declarated, each...more >>

hi how do i format my c-sharp code? sometimes when i delete certain lines of code , the code is not formatted automatically. how do i do that? thnx ...more >>

Hi it's possible to "overclass" (at runtime) a base control with a new instance of a derived class? Thanks ...more >>

My application is written in C# and I'd like to pass 'double' array to managed C++ class library (which is a native C++ wrapper) Of course the array should be passed by reference and not by value, therefore the C++ prototype is something like that Void myFunc(double * myData Since C# doesn't sup...more >>

In my Windows app, I'm running a batch process that's composed of a FOR loop that'll run 15,000 times (datatable row count), copy cthe data of each row -3 fields- to a struct, and send the strct to an external method (using DLLImport). The problem is that the processing speed is very inconsisten...more >>

I would like to parse RSS 1.0 (not RSS 2.0) files. But I don't know how to work with these XML namespaces! And when namespaces are improperly used in RSS 2.0 files, I don't know how to deal with them and exceptions keep getting thrown! Does anyone have a tutorial or know of one that deals with X...more >>

I'm writing a windows service, that does some stuff every second in a loop, generating random numbers. It works fine apart from the fact that for some reason it's using an extra 8K of memory every loop. I've isolated it down to the use of the Random object. When I remove the use of this object my...more >>

hello, how can i have multiple datarepeaters on the same aspx page? i have tried something similar to this: <asp:repeater id="repeater1" runat="server"> <itemtemplate> <td>text</td> </itemtemplate> </asp:repeater> <asp:repeater id="repeater2" runat="server"> <ite...more >>

If I were to use the following call: Mutex my_mutex = new Mutex(); bool got_lock = my_mutex.WaitOne(500, false); and then got_lock returns false, do I need to call "my_mutex.ReleaseMutex()" on it? So put another way, should I always call ReleaseMutex, regardless of whether or not I got the...more >>

Hello Is there any class in C# with qsort() function ? Thanx Michal ...more >>

I can´t find information about how to work with a Microsoft Graph object in windows forms using C# I have a macro in PowerPoint which creates slides and elements like graphs using Microsoft Graph 10 ("MSGraph.Chart") and I'm migrating to C# with Visual Studio .Net 2003 but not enough information ...more >>

Hi, I have a problem. We have web applications on 2 seperate servers that need to talk to each other. App 1 needs to pop open a second windos with App2 in it where you choose a value and that is returned to App1. The problem is that when we try to call App1 from App2 with a value say in it's add...more >>

I have been using System.Text.Encoding.Unicode.GetString(byte[],0,72) to converter a byte array from the registry to a string. This works, but I end up with a bunch of null characters after the "good" string data that I need to parse. This is evidenced by the fact that string.length returns 3...more >>

hi, I have a table in sql 2000 that has a few fields. one of which is datecreated. I have an xml document that i created from this table. i need to find out the max(created date) from this xml file using c#. how do i do this? do i need to use xpath? or do i need to use one of the reade...more >>

I have a system in which I have a single thread that places data on a Queue. Then I have one worker thread that waits until data is put on the thread and dequeues the Queue and processes that information. Works just fine. However, I possibly need 1..m worker threads that can act on the same pi...more >>

Is there a way to make a property of an inherited class invisible to the programmer? I know that using the keyword "new" allows you to create another property in the place of the existing one, but how can I make the property hidden and not available at all? Thanks, Jacob ...more >>

Does anyone know of a textbox like control that allows to markup text and save the results as HTML. This would be very helpful. Thanks -mike ...more >>

Hello Is there any proprety/method to set that i always see new text (vertical scrollbar always on bottom) ? Thanx Michal ...more >>

Hi ! What is the common use of sharing a single .cs across multiple project files ? I think it's to share common classes between projects. I have actually a .cs file shared accross multiple projects in a same solution. It's nice to have a common "set" of Classes. Is this the only way t...more >>

Hi, I wanna buy an advanced 3rd party DataGrid for windows forms .Net framework. The best tool for me will be a grid inherits from the 'Windows.Forms.DataGrid' object, meaning that I will have a full compatibility with the object I'm using today. Any recommendations are most welcomed. ...more >>

I am writeing a webService that needs to recieve a CDO.Person object as a parameter. but when I run it I have a runtime error. Cannot serialize member CDO.PersonClass.DataSource of type CDO.IDataSource because it is an interface I assume that something is wrong with the serialization of this...more >>

Hi, My goal is to have a series of thumbnail images on a control/panel and to drag/drop those items onto another control (i.e. a treeview). I am able to drag one item and need to somehow select more than one thumbnail image. I would like to use the Control key/Left Mouse Click to select more...more >>

Is int to Int32 as string is to String? If that's the case, then the following is logically equivalent: //equivalent int MyInt = 5000; Int32 MyInt2 = 5000; //equivalent string MyString = "slick"; String MyString2 = "slick"; Correct? Is int then essentially an alias for Int32? Tha...more >>

hi there is a way to obtain the handler's list for a specific event of an object? thanks ...more >>

I am finding the windows handle for an application using the FindWindow() call. I need to then close that application if it is running. Any suggestions on how I should do this? I tried to use the CloseHandle() call, but that doesn't seem to work. Maybe I am just doing something wrong, or maybe I...more >>

Hi I'm trying to apply the "reset password" right to a computer object in Active Directory.. To do this, i used the ActiveDS lib Whatever i do, i get the 'The security ID is invalid Here is my little code (in C#) ActiveDs.IADs dsobject Ac...more >>

I'm creating several forms that inherit from a base form. I want to require the derived forms to implement certain methods of the base form. The easy solution would be to declare abstract methods in the base form. But I can't do that, since the WinForms Designer can't instantiate an abstract form...more >>

I'm using a web service proxy with a method that accepts a byte[] as a parameter. The intent is to send an XML document via this byte[]. I'm trying to do it with the following code MemoryStream byteStream = new MemoryStream() XmlTextWriter xml = new XmlTextWriter(byteStream, System.Text.UTF8Enc...more >>

Thanks to all... I need to read a block of text, operate on the read text then move to the next text block and so on and so on from a 650MB file. Pseudo code would be something like this: 1. Start at the beginning of the text file 2. Read in 100K of text 3. Work with the 100K of text 4....more >>

I'm trying to use Forms authentication for my site, I've got <authentication mode="Forms"><forms loginUrl="MyLoginPage.aspx"> .....</forms></authentication> in my web.config file, and I've designed a login page. But the login page never gets displayed. How can I make the login page get displayed ...more >>

Hello Thanks for reviewing my question. I noticed that the ListView properties do not offer any Data Binding option. Did Microsoft forget this Many Thank Peter...more >>

hi, i m new in C#....... here have the simple question abt GDI+ i draw some lines and rectangle into a picturebox by using pen and brush. By what way, i can check a particular of pixel on this picturebox is drawed or not?? Beside, how to convert these lines or rectangle shapes into objects...more >>

Is it possible to determine a method's own attributes from within the method without hardcoding the name of the method as a constant within the method? Please tell me if it is possible and how it is done. Thank you, Kelly ...more >>

Hi, I'v created NT service using Windows service project template. Now , I want to recieve WM_USERCHANGE and WM_DEICECHANGE messages after the service started. How can i do this? Thanks....more >>

Basic of basics ...... OK I have created a basic winows application using Sharp Develop. I have built it successfully as a windows .exe. The problem is that I am only able to run this application on my own computer, because I have the .Net framework installed. How can I compile my applicat...more >>

Hi - I am using the Encoding class to encode unicode strings. I am encoding into a variety of target encodings eg utf-8, 'iso-8859-1' or 'iso-8859-5' etc like this: encodedBytes = Encoding.GetEncoding("iso-8859-1").GetBytes(TextBox1.Text); anyone know a technique to cause exceptions t...more >>

When I add a reference in Visual Studio to quartz.dll it creates a new file named "Interop.QuartzTypeLib.dll" into to bin folder. My app only works when this file is in the application folder. Is is legal to ship this file with my app ? Does Microsoft allow it? If not how can I use directShow w...more >>

When building a windows forms application in C#, I notice that you get two different folders for different builds, debug and release. But when building a web application there is only one, c:\inetpub\wwwroot\<projectname>\bin .. Am I right in thinking that whether the current build that is prevale...more >>

How can I limit an application to running only one copy of itself at a time? -- -- Thom Little -- www.tlaNET.net -- Thom Little Associates, Ltd. -- ...more >>

During an uninstall, how can I check to see if the application I an uninstalling is currently running? -- -- Thom Little -- www.tlaNET.net -- Thom Little Associates, Ltd. -- ...more >>

Is it possible to use System.Type, Activator or whatever to create a complete "blank", unitialized object of a given type, and then at a later time call a constructor on it. The only caveat is that before I call the constructor I still want the object to correctly return its type if GetType() is...more >>