Hi Anybody had ever used this statement? ///// SetSocketOption(SocketOptionLevel.Socket,SocketOptionName,DontLinger,new LingerOption(false,0)) //// Whernver I use this will got a excption only has a message read "OptionValue" ...more >>

Hi. I need to perform DBLCLK on TreeView Node. I try the following: [DllImport("user32.dll")] private static extern int SendMessage(IntPtr hWnd, uint msg, UInt32 wParam, UInt32 lParam); private const UInt32 WM_LBUTTONDBLCLK = 0x203; pTreeNode.TreeView.SelectedNode = pTreeNode; UInt3...more >>

Hi, I'm totally bluffed: how can a 'public const string name = "myname";' ever evaluate to null? I have the following class: public class MIB2 { public const string org = "1.3"; public const string dod = org + ".6"; public const string internet = dod + ".1"; public con...more >>

Folks, When I single click on a single word, within a RichTextBox, how do I set that word's background color ? Regards, Joe ...more >>

I have this error, what it means "An unhandled exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dl Additional information: Exception has been thrown by the target of an invocation."...more >>

I create an object with type A dinamicly and when I obtain it I tryed cast it to A and this action cause an exception A a = (A)dynamicCreation(...); // this cause invalid cast exceptio Thanks for any help ...more >>

Im working on writing an FTP application in C# to get a good feeling for the .NET language and how threading / networking classes all work. Thus far I have it working for the most part in PASV mode. The only problem I have encountered is when the server ends the connection, the socket cant...more >>

how should look string format that the String.Format() return result the same like function sprintf("%08x%08x", a,b)?? ...more >>

Hello, does anyone know if it is possible to react on ms sql triggers in c# and how to do it ??? AM. ...more >>

Hi, I have an interface with an event. I'd like to explicitly implement the interface by a certain class. However, I received the following error: "An explicit interface implementation of an event must use property syntax" Here is a code sample: public interface IFoo { event Evenet...more >>

Hi,=20 I want to protected all files in my website, so I try to use = httpHandlers, I put this in my WEB.CONFIG (at the end of page), but I = can't protected the files type MDB, CSB, can someone help me? : <httpHandlers> <add verb=3D"*" path=3D"*.mdb" type=3D"System.Web.HttpForbiddenHand...more >>

I was wondering if someone could lend me a hand with a C# problem I am having I am trying to use the “setPrinter” api to change the duplex setting (under printing preferences on printer context menu) so that I can send a document to the printer in duplex mode These are my declarations [D...more >>

Can I change the font and backcolor of individual cells of a propertygrid control ?? And what if I want to make this change row-wise?? Say, show diff prop in diff colors?? ...more >>

I need to serialize a class that have a field of type System.Windows.Forms.Panel it give me an exception saying that "...System.Windows.Forms.Panel is no marked as Serializable...", how can I resolve this problem if I need to save the panel field... Thanx in advantage;...more >>

I have a simple xml file that contains, in part, content that is in HTML. I am encompassing that content in <![cdata[]]> tags. This works fine. However, my application needs to output the XML file (from a strongly typed dataset) to plain text. I am doing theText = myDataset.getXML() Wh...more >>

Hi Guys, I know XPath is a good method to search into an xml file but what if you're looking for a specifc data which could be any where within the xml file ? Should I consider all possibilities and paths in the xml file ?!!! Isn't better to have a recurrsive method to traverse the whole...more >>

with the using construct, exit from scope calls dispose on said object. But what happens in a connection pooling scenario? Is the run-time smart enough to realize that Object Pooling is being used so it will not call dispose and instead flag the object similar to what close() does when pooling is...more >>

On my ASP.NET pages, it seems that _after_ any web or user control - an extra (small) line break or space is inserted automatically right after the Control. This is unwanted since it messes up vertical alignment preventing me of having things "touch" each other. I have tried surrounding the co...more >>

I'm looking for any good database programming with C# books, any recommadations? Note: I'm just learning C# coming from VB back ground. I'm looking for something that explains ADO.NET and C#. I don't want to know about the .NET IDE or anything like that, I want the down and dirty of C#, etc. ...more >>

Hi All, Is it possible to add other controls to the ListView control in C# windows forms. i.e. I want to add a button column so to speak to the list view. You can do this sort of thing with the datagrid in asp.net, however I think the datagrid in c# is overly complex for what I'm wanting to do...more >>

Anybody got any idea how to do this? They don't get handled with the regular keydown/keypressed events thanks, bill...more >>

When working w/ forms and controls, in 95% of the cases, the value of the control is used somewhere in the program (duh!). However, there doesn't seem to be an easy way to attach a value variable to that control the automatically handles synchronization of the value w/ the contol. Here is a...more >>

I have a base class in an assembly that I want to add the following attribute: [StringNameIdentityPermission(SecurityAction.InheritanceDemand, PublicKey="00024....e45e")] The assembly is strong named and all the derived classes are in the same assembly. The problem that arises is that at ru...more >>

I am trying to convert a string into a uniqueidentifier by using the following code string contrID = Request.Params["oId" SqlGuid sqlID = SqlGuid.Parse(contrID I am then putting sqlID into my SQL WHERE clause so it only pulls that record. I've double checked that the record I'm trying to pull ...more >>

Suppose I have the following in file1.cs (all code is compacted to reduce the number of lines): namespace B { namespace C { class D { public static void Print() { System.Console.WriteLine( "B.C.D.Print" ); } } } namespace E { class D { public...more >>

Hi there! I'm using a COM component from my C# application and I can't get it to work properly. I get a COMException (Invalid procedure call or argument) on this line : //*** ArbreSaisieClass as = new ArbreSaisieClass(); bool bSubLevel = true; bool bValid = false; bool bCalcPrice = false...more >>

Hi I often use Queue.Synchronized method to create a queue for multithread writing. I also know I could use SyncRoot and lock to write Queue. Could anyone here please explain to me the pros and cons between those two approaches Thanks a lo Chris...more >>

I have an asp.net page in C# and this code does not when I point it to my database, it works fine going against the pubs sql db but not mine String selectCmd = "SELECT dbo.Task.emailAddress, dbo.Task.tasks, dbo.Task.datePosted, dbo.Task.comments FROM dbo.Team INNER JOIN dbo.Task ON dbo.Team.I...more >>

Hello, Is there any way to make a form part of a windows service application and launch it upon double-click of a system tray icon? I already have the NotifyIcon working and have added an event to it for the _DoubleClick. I added a form and tried to open it with: {Form ...more >>

I want to compare two DateTime values but only down to seconds, so how do I truncate DateTime values to second granularity ? Similarly, I may want to truncate to the minute granularity. I also may want to round to the nearest minute. How do I do these things ? I'm sure it must be really simple...more >>

Hello I am trying to send an object over the network. However I want to be able to sign the object. I looked at the sha hash function provided and it takes in a byte array. I thought of converting the object into a stream using binary formatter, then converting the stream into a byte array and f...more >>

Hi I have to use functions inside of system apis so I want the correct dllimports declarations in c# for the following functions or information about where I can get these statements. + OpenProcess + CloseHandle + EnumProcesses +EnumProcessModules +GetModuleFileNameExA +GetProcessMemory...more >>

Hi, Can someone tell me where to look to enable me to read "Folder Options" user settings for hidden/system files from within C#/VB.Net/Any other .NET language. I'm pretty sure it must be part of the framework, but I'm buggered if I can figure out which part. I've tried googling for it, but to...more >>

Hello, I have a datagrid which is bound to a datatable. I created the "DataGridTableStyle" object and defined all of the columns that I wanted to display. There was one column, however that I did not want to have displayed and as such, I did not reference in the DataGridTableStyle. When t...more >>

I want to check for a conditon as follows: if ( name Like "sa*") So, I need to use this * as a wild card and the above statement should = return all those names which starts with sa. I know that VB Like operator will do this one. I want to know whether we have any similar one in C#?=20...more >>

I am a newbie to C#, so bare with me. This seems like it should be an easy task Thanks...more >>

VS.NET 2003, C# and .NET Framework 1.1. Hello, I am trying to serialize a small sample class using the XmlSerializer class. ** Here is the code: DerivedClass myClass = new DerivedClass(5, "sample string"); Stream fs = File.Create("sample.xml"); XmlTextWriter writer = new XmlTextWriter(...more >>

Hello: I want to know the class of object, to compare to some class, how can I do that? Owen. ...more >>

If an object implements an interface, are interface methods always virtual or only if accessed through the interface? For example, if I have: interface IFoo { public void Method1() } and I have: class Bar : IFoo { public void Method1(){} // IFoo method public void Method2(){...more >>

http://activex.126.com ...more >>

Why can't you take the sizeof a class? Would there be some implementation problem for the compiler writers, or is it to stress that there is just no point in knowing the size (since you obviously could never do pointer arithmetic with reference-type objects)? I don't see how there would be an ...more >>

Hi, How can I get the extention name of one file when I have a file list ? Thanks. ...more >>

hi all i am going to be soon in india on my travel around the world. i was thinking of doing a software-school in india. (MSCD or something like that) does anyone of you have some experience n India or has some adresses? thanks for your help greetings jonas ...more >>

I am missing something obvious here. I have a simple grid with 2 columns pulled from an ADO.NET ODBC datasource. All that I want to do is lengthen the columns in the grid so each field displays completely. Somehow it appears the order in which you set your grid properties determines whether ...more >>

I am curious as to 2 things. One is the order that the constructors are handled and the other is why the debugger doesn't show the static objects constructor (unless you set a breakpoint. For example, here is my code: *********************************************************************...more >>

Hello, are there any good references to .NET history? I would like to read some more about the development of the ILasm language and the C# language. were they developed separately? is it true that the first c# compilers targeted JVM because the .NET RE was not ready at that time? how the ...more >>

Hi, is there a (built in) way to use MSMQ as a "timer": MessageQueue mq; // . . . mq.ReceiveCompleted += new ReceiveCompletedEventHandler( MyMSMQHandler ); // . . . private void Foo() { mq.Send( /* Send MY_MSG_CODE without delay *& ); } private void MyMSMQHandler( object sender,...more >>

Hi, I have an application, the user are able to change records in this application. Also, there's a button called "What If". After the user pressed the "What If" button, the user may change the records and save it. When the user open the same record again, all the changes is there. (Pls. n...more >>

byte[] salt = new byte[8] {0xA8, 0x9B, 0xc8, 0x32, 0x57, 0x35, 0xe3, 0x03}; PasswordDeriveBytes p = new PasswordDeriveBytes("thepass", salt, "MD5", 21); EncryptData(args[0], args[1], p.GetBytes(8), p.GetBytes(8)); Does anyone know how to convert this code to C++ code that doesn't use the ....more >>

Hi, I am using Application.startup path in debug mode and of course its looking down into the debug directory instead of Project directory. What command can I use to have it looking in the project directory during debug mode? Or better yet how do u guys handle path setup for apps? What ...more >>

Is there any way to create a Csharp Console application that does not require the user to have the .NET framework installed?...more >>

Hi, I'm currently working on a little tool to copy files over the network using FileStreams. I've written a class that takes care of that. I create an instance of the class within the main program, specify some properties and start a new thread which calls the StartCopy method. My idea was t...more >>

How can you get all the items out of the collection of a listbox? -- Ryan Schoolman - Programmer & Application Architect ryan@pclegends.com PC Legends http://www.pclegends.com [w] 715.839.6855 [c] 715.379.0878 [h] 715.855.9003 ...more >>

Is there a Web Control that I can use to generate a calendar similar to an Outlook calendar... I.e, if I have a event on a given date, show that event on that day on the calendar... likewise, If I have an event spanning multiple dates, show a bar across all the dates... and if there are several ...more >>

Hi, I would like to know whats the difference of inherit from webcontrol or webcontrols In wich cases its better the use of one or another Thanks in advance Regards Josema....more >>

Hello, Is there anyway to get the menu's to appear like Office 2003 or VS.Net 2003 in .Net? I was using Application.EnableVisualStyles() but this works for textbox and buttons if the FlatStyle is System but the menus are still in the old plain format. Thanks...more >>

Hi when comparing a Type object to several built-in types, do you recommend to use Type.GetTypeCode() instead of typeof() ? Is there a BIG performance difference Example if (type == typeof(int) || type == typeof(long) || type == typeof(decimal)) .. -OR int typeCode = Type.GetTypeCode(type) i...more >>

How are you supposed to pronounce C#. I say 'C-sharp', but I don't know if that's right....more >>

Hi the following code should throw an exception, but it doesn't! can anyone tell me why tr IPAddress test = IPAddress.Parse("192.168"); //invalid inpu catch(Exception mye MessageBox.Show("error") return Any ideas Sam Henson...more >>

i must write a "simple" application, it should work like this scheme: client: acquire from mic->compress audio->send server: server: receive audio->decompress->play on speaker. (the sound must go only from client to server) i'm new user of c# and i can't find the right metohd to do...more >>

hello how can we change cursor on particular text in richtext box using c# i.e i want to change the cursor from default to Hand when the mouse moves over a particular text. regards --rammohan...more >>