I am using the datasource property to populate the datagrid. Once populated the user has the option to select/deselect fields. How do you delete columns by mapping name. Does anyone know how to do this? Thanka in advance...more >>

Hi All, How to Implement Move Next, Move Previous, Last Record and First Record = in a DataGrid Control ? Is there any standard tool available in the tool box button? Thanks for your time. Regards Anand Ganesh...more >>

Hi i just read: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/exceptdotnet.asp Wich is interesting reading by the way. But. I have'nt used exception very much to anything else than ordinary FileExeptions etc. Now i want to create my own exception hierarchy. I...more >>

Hi! How can I "delete" the top of a Form? The part where the Form title is and the the close, minimize and maximize buttons are? I've seen that in some applications and it looks really nice (at least to me :) ). One other thing... can these forms be used within MDI forms? ...more >>

I'm intrigued, MessageBox has gone to MessageBox.Show; but where is MessageBeep? I've trawled the help and cannot find any reference to it! The only instance I've seen is using the following to import it from user32.dll: [DllImport("user32.dll")] public static extern bool MessageBeep(BeepTy...more >>

I'm writing a program to monitor the operation of a process. Part of the process involves trigging a method, then waiting for the creation of a flag file. I want my code to pause at that point. How would you recomment waiting and monitoring. I can think of two ways: 0. Start a timer. 1...more >>

Situation - Using the table pubs.titleauthor in a strongly typed dataset, attached to a datagrid, using the datagrid I would like to set the royaltyper field = null (the database allows nulls in this field). But when click on the cell and remove the field value (leaving a blank), and move to t...more >>

Thank you but I still have some problem as I explain here. 1 application with form1 1 dll which is holding some usercontrol etc... The idea is to use the user control dll to alter the Form1 controls When Form1 load then I call and initialize my usercontrol dll First I notice that the controls ...more >>

Which functions are available to move a part from byte[] into another byte[] ? Let's say I have a byte[] of 20 and another of 40. And I want to move 5th to 15th from the first byte[] into occupping bytes 20 to 35 of the second byte[]. Thanks in advance, ...more >>

Is there a quick way to toggle a Boolean variable? Something shorter than: blah.blither.blatt = ! blah.blither.blatt; ...more >>

I have made a custom control that draws a rectangle when the mouse is = down, and does nothing when the mouse is up. I set/reset a flag in MouseDown/Mouse up and use this to do the drawing = in the OnPaint . The recangle draws correct when i press the mouse, but when i release = the mouse ...more >>

How do create a new line in a text box. If I put \n in my string, and set .Text to the value of the string, a carriage return character is displayed literally, but it doesn't actually start on a new line in the textbox. ...more >>

I am using graphics as backgrounds for forms,buttons,labels etc. The question is: is it faster to load all graphics from files on app start or to use it embeded (places in editor during design). Reason for my question is that application has 5mb, while without graphics it has cca 400kb. Graphi...more >>

Hi, I am learning to code a WinForm application which will need to access a Web Service outside the University network. Our University require us to go through a proxy in order to access the Internet. In addition, the proxy require us to authenticated before allow us to go through it. I hav...more >>

application_start onRemove = new CacheItemRemovedCallback(this.onRemoveReload); HttpContext.Current.Cache.Insert("CUSTOMERLIST", ds, null, DateTime.Now.AddSeconds(5), Cache.NoSlidingExpiration, CacheItemPriority.Normal, onRemove); onremovereload //onRemove = new CacheItemRemovedCallback(this...more >>

Hi, Does anyone know where I can find a VB.net to C# converter? Thanks, Mark ...more >>

I'm working on an office application that's going to need to print out 300+ billing statements. Since that seems like a lot, I'm thinking that will slow things down, which would be bad. So then I thought that it would be cool if I could just send a billing statement to the printer when the pri...more >>

Hi, I'm trying to decide whether I should use Guid.NewGuid() to generate an ID or using database sequence. Is Guid.NewGuid() will return a unique number? The MSDN said that the probability of duplication is low, but how low? Does anyone know? thanks, /m ...more >>

Can the main thread be notified of an event raised by a spawned? A button on a form creates a new thread which will raise an event when it is finished. When the form is notified of the thread termination event, I want my form to create a new form and make the new form's MDI parent the same as...more >>

Hello I am writing a program that makes and window popup and plays a sound repeatedly until the user does soemthing. however directsound for some reason does not play the sound if is does not have focus. Does anyone know how to get round this ? thanks in advance. Kalpesh Modha ...more >>

Hi all Is there a way to simulate a click on a scrollbar (horizontal) of a FataGrid ? I need to programmatically scroll the grid to the right/left upon some condition, when the total width of the grid columns is greater then the grid`s rectangle. TIA Boaz Ben-Porat DataPharm a/s Denma...more >>

Hello All, I am trying to call a Function in SQL Server which returns a TABLE type. I get an exception Unhandled Exception: System.Data.SqlClient.SqlException: The request for procedu re 'testFunc' failed because 'testFunc' is a function object. at System.Data.SqlClient.SqlCommand.Ex...more >>

Hi NG. I am intersted in which persistence mechanism you are using in your projects (which persitence layer - data access classes, or-mapping-tool) (for databases) Which experiences do you have? Thx....more >>

Hi ! I'm wondering about the use of the 'using' statement. In a procedure, should i declare all instance variables in a using clause ? In the below code, what would happen if MyFont & MyFont2 would be declared in the body of the Main() and not inside the using (even not referenced in th...more >>

Hello, I have a simple problem. I got two visual studio projects, one is an application, the other a common windows service. The application needs to get a remote reference of the service. Now the question: How do I get the application-project known to the referenced classtype of the remote ...more >>

Hi All, How to create floating toolbars which can dock wherever the user docks it ? Is there any easy way I can implement using C#? Thanks for your time and suggestions. Regards Anand Ganesh ...more >>

Can someone please help. I am trying to make use of a datagrid in C#. I create it and fill it with no problem. When it comes to double clicking it I have problems. The double click event will not fire unless I double click on the Row Header. If I remove the row header, I cannot get the event...more >>

Hi, i need to create a .NET class that will provide the same functionality as the windows 'run as' command. it seems that this code is not available in the .NET framework. I have found an example that will logon he desired creadentials to get a security token. the only thing i need to do...more >>

The lat part is not working why ???????? Please help......... using System; namespace ConsoleApplication4 { class reflection { public const string mstr =3D "hellpppo world!"; public System.Windows.Forms.TextBox textBox1; [STAThread] static void Main(string[] args) ...more >>

Hi! I will install "Remote Components" on my server to get SQl debbuging working. when I click on the "Install Full" button (To install full remote debugging on all operating systems) I get this message box: Incorrect command line parameters. Windows Installer. V2.00.3790.0 ..... w...more >>

How does one call a static C# method from an unmanaged C dll? Thanks ...more >>

I caught those new letters tacked on to your name. On behalf of the lesser mortals, Congratulations, it's well deserved. ...more >>

Hello, In the code below, is there a shortcut not to use the temp var CurrEmployee ? I would like to use something like "if (Employee)MyArrayList.Name" but don't know the syntax.... ******* CODE : (MyArrayList is a list of Employee) ******* Employee CurrEmployee; for (int i = 0;i<...more >>

Greetings, I am simulating an assembly language bit rotation in C# and it works wonderfully --------- .... public uint Value; .... public uint RotateRight(byte count) { Value = ((Value >> count) | (Value << (32-count))); return Value; } --------- as long is the value is 32-bi...more >>

I have a form with a bunch of combo boxes that will be populated at runtime based on user input. I have created a class for the form with will handle all of the UI processes. I am trying to create a generic delegate that will handle all of the combo box loads. So, when the form invokes the UI ...more >>

I have added a mainmenu object to my windows form and would like to display an MRU list on it. Is there an easy way? or do I have to do it programatically? Can anyone point me to a good tutorial. Thanks for the help. Paige W....more >>

Hi, I have a web form I use to allow users upload files to the web server. Instead of handling this operation in the code behind of the web form, I want to create a class that contains document management functions in it. However, I don't know how to pass the file to this class. I'd appreciate...more >>

I have some VC++ tested code that I want to use from C#.NET. I know I = have methods to port the code from VC++ code to .NET but my code is = tested and I do not want to port that to C#.NET. Then I know that .NET = can use the unmanaged code, I think I have options to make the dll of = the cod...more >>

I have several controls in a frame. I want one of controls to have the focus (input focus) when the program starts. However cotrol.Focus() does not work. How to fix this problem? Thanks a lot, Pengyu ...more >>

Hello, Is there a simple way to read a random access file that has been created with VB6 using direct writing to disk of Type....End Type structures ? I have not found this possibility in C#. Is it possible to map directly a buffer (read from a stream) to a Structure in memory ? If yes, ...more >>

Anyone know what the VB.NET equivalent of this C# statement is... byte [] segBody = (byte []) sqlReader.GetSqlBinary(3); Tried as hard as I could to do it in VB.NET but I cannot seem to do it. ...more >>

OK, I just ran across a program that did this and I am wondering is this something they coded in themselves, or is there already helper classes, etc available to assist in this. The application compiles many C# files at runtime and then uses them. How easy/hard is it to do such a thing? Tha...more >>

Hi; We have one project that has multiple dll dependencies. on one shared folder, we have shared dll's that project needs to load and use on runtime. if I add items to referance list and mark as don't copy local, when project starts running in dev env. project cant see this dll's that is...more >>

Hi, I am new to dotNet, as my background is from Delphi, I am always looking for the way to do it that way :) sorry abt that. I was looking for a way to delegate the interface supported by my class to one of the contained class which we can do in Delphi using "implements" keyword. OK to ...more >>

The combobox can drop and be selected,but the display member or text showing can't be edit. Thanks in advance. ...more >>

I'm creating a routing application that uses both MSMQ and IBMMQ message queues as a requirement. When retrieving a message off an MSMQ, I ask for the message body stream to get the message data, but when I reference messages coming off an IBM MQ series queue, I receive a string. Now all me...more >>

I have some references in my GAC which cannot be removed using Gacutil or the Microsoft .NET framework. On delete it gives this msg Pending references: SCHEME: <WINDOWS_INSTALLER> ID: <MSI> DESCRIPTION : <Windows Installer> have tried the various uninstall program. related ...more >>

Hi all, I have an xml document that can contain 248 nodes with each node containing different fields. There is the possibility that there will be more nodes. Each node can have up to 30 elements. What do you suggest is the best way to parse through this document? Should I create a ...more >>

Ok, maybe this is getting too lazy and too demanding, but hey, I thought I'd see what people thought about it. Would anyone else find a syntax like: foreach (string Name in CompanyNames and EmployeeNames and ...) { etc } useful? I know that on some collections, you can append, insert et...more >>

Hi all, I have an ASP.NET DataGrid wherein there is an edit link for each row. Upon clicking the link, certan fields in that row display in text boxes so that they may be edited. I would like some textboxes to be wider, some narrower. By default, they are all the same pre-defined width. Doe...more >>

I want to buy Visual C# (or C++) and use it to develop for the Tablet PC. I can't figure out what to buy. I can buy the Visual C# .NET ($109), but don't know if that has the inking libraries. Anyone who has bought something similar, please let me know....more >>

Is there a way to set a value for an item in a combo box that's different than what's displayed? So, for example, I'd like to do something like -- John Smith Mike Jones but hidden behind each might be an employee id (155, 239). When user selects item on the Combo Box, I'd like to ext...more >>

Hello Everyone, I would like to use EnumPorts twice on my form. The first time I want to use Port_Info_1 to just list the Port Names. The second instance where I need EnumPorts , is when I receive the Combo.SelectedIndexChanged event. I want to use EnumPorts to get the Port_Info_2 based o...more >>

I have an unmanaged library that handle many TCP/IP connections. In my .NET application i want to test if there is input available on these connections. Using an existing function of the unmanaged library I'm able to retrieve the list of Int32 socket-descriptors handled by the unmanaged library....more >>

Is it possible to develop an Active Document Full Server or a Container application using C#? Thanks, Kevin....more >>

When the user tries to close a child window, I want to use the Closing event to hide the window instead and cancel the close. How can I cancel the window from closing? Thanks....more >>

Hi, Can anyone of u give me a pointer how to create a new .chm file.. One more thing is can i update the existing .chm file with some more information embedded in the xml file. Thanks & Regards Tilve ...more >>

Is there a way to have a handle on a control having only the control name So I dont have to loop through all the controls nested on the form. checking for the control name = my string this could be long and heavy on memory Assuming the control name is "btn_Save" How to get to ctr being the ...more >>

Greetings, If I havea a numeric value, lets say, "uint value" and I want to set the 5th bit, I can't just say "value = (value & 0x20) because it yeilds a boolean evalutation. I can't just add ((2^5)-1) because I am not guaranteed it will set the 5th bit. Thanks, Shawn ...more >>

I am considering using the DataGrid to show my data. I will take the class data and serialize it / xml transform it or simply load it into a new XML document. The new XML document is essentially a recordset - simple rows. I'd like the content to be fully expanded - whereas now I get the ...more >>

I need to import and export CSV files. Before I head off the create my own CSV parser (got the link to Falafel's articles), is there a way to use the DataObject class in this process? I don't want to waste time figuring out what it does if it's really not going to help. It sounds like (from the...more >>

I'm trying to figure out the best way to parse an input string from a file for hex values. The string is actually Motorola S code produced by an embedded assembler. For example lines contain S1142CD0XXYYZZ... I've written similar programs in C/C++ where I save the string and use a pointer to ...more >>

Hi, I use DateTime.Now to display the current date and time. For instance, it's default format is 2003-10-29 21:23:36. How can I change the format as follows? 10/29/2003 9:23:36 PM MM/DD/YY HH/MM/SS AM/PM Thanks for help Tom *** Sent via Developersdex http://www.developersde...more >>

Consider a struct that resembles this: struct mystruct { byte[] myarray; // ...other stuff... } i.e. a struct that contains at least one reference/pointer. The meaning of "=" (and the meaning of by-value parameter passing) is to perform a memberwise copy of the struct. This is also...more >>

Hi, after reading the documentation on C# generics from several sources, I'm still unclear whether it is possible to infer associated types from a type argument. For example, if I have an enumerator or iterator for a sequence passed to a generic function, is it possible to arrange things such...more >>

Is there a way to retrieve the ddl from a database via C#? I'd like to extract the parameter information and build a quick test harness. thanks, Scott ...more >>

I see this error in my ASP .NET code: [SqlException: Line 1: Incorrect syntax near '.'.] I am trying to execute the following: private const string SQL_SELECT_USER = "SELECT User.Email, User.FirstName, User.LastName, User.Status, User.Phone, User.Privs FROM User INNER JOIN Login ON User.Use...more >>

Hi, how do i execute a .exe file using C#? Thanks, Tim. ...more >>

I have to write something VERY similar to Kazaa. Is there something I could use to do some estimation of development time? Is there anything done on the subject in c#? I couldn't find anything handy in google for c#. any pointers? thanks, Matias ...more >>

Hi, Does anyone know how to dial a connection to the internet in C#? Thanks, Tim. ...more >>