I want to set a DateTime field to Null before passing it to the DB //First I check to see if anything is in this datarow column, because sometimes we have no data. DateTime dt; if ( datarow["date"].ToString().Length > 0) { //We assume the data is a date dt = (DateTime)datarow["date"]; } ...more >>

I am comparing performance of my own application with another microsoft product. Is there first of all any s/w that could measure the performance of a running application like Ms publisher.....would be great if their was. I would at least like s/w to measure the performance of my own C# applicat...more >>

Has anyone been able to record microphone data via C# in any way? I know there is a way with winmm.dll but I have not been able to manage the whole process yet. Any code would be GREATLY appreciated! ...more >>

I have created a custom textbox which contains an arraylist of permitted chars. Any chars that are not in the list are not permitted. One of the events looks like this and is attached to either this.KeyUp or this.KeyDown: private void TextBoxEx_KeyAction(object sender, KeyEventArgs e) { ...more >>

hi im trying to write an app in C# which catches file delete event and keeps a copy of deleted file to a location before windows sends the file to the Recycle Bin. Im not able to do this wehn i delete an outlook message. any help on this issue wud of help. -- thanx.. Bhavtosh...more >>

Hello all, i have a problem to change system time programatically in C#. Can Any one help me with that. thanks -- Srinivas L.Kollipara ...more >>

Hi, I'm writing a server application which uses TCP sockets. In real time, there would be about 4000 clients connect to this server app. I need to broadcast a packet regularly to make sure all clients have up to date info. Can anyone suggest me how to broadcast a packet to all o...more >>

i need to present user with an Outlook mail item. the following code is a modication to the code found here(http://support.microsoft.com/?kbid=819398). However, when the line is question is run(Outlook.MailItemClass mItem = (Outlook.MailItemClass)oDoc.MailEnvelope.Item;), it generated an exc...more >>

Hi When i select a node by "node.Selectnodes("*/ABC")" the nodes dont have ne details abt the parent. Can some one plz tell me why its is not storing the parent details. after selecting i need to delete the nodes so i need the parent details Regards Saurabh ...more >>

How to access a control in another form and how to make a form become a MDI container. ...more >>

Since the .NET framework 1.1 does not come with any built-in file/stream compression methods, I've had to come up with my own solution--which is not much of a solution because it doesn't work for all cases. I don't know why. It'll work for short input strings, but the problem is when I try and...more >>

My service send email messages and log all information to a log file I wonder if it's common to raise events from the service(the remote object which hosted inside the service) to my MMC snapin, so user will be able to see (roughly) what the service is doing I am thinking about something si...more >>

Hi, I am using Dom Parsing in Xml. I am the parent node and it has many children and each children has many children. I want to select children with a given name . Is there any method by which we select them with not going to each child node .. something like node.selectnodes (* +...more >>

hello in my program,i have following method,it copy a jpg file to clipboard,and works well: Private Sub CopyImage() Dim file As System.IO.Stream = Me.GetType().Assembly.GetManifestResourceStream("ProductCatalog.Nwind.jpg") Clipboard.SetDataObject(System.Drawing.Image.Fr...more >>

Hello, I'm calling a web method of an xml web service. The method returns a class that is serialized according to an xml schema definition. The xml schema is very extensive an has several level of nodes (child nodes). My question is: How can i best read data from the class that the web ...more >>

Hi All, I am working on Text editor. We are using Microsoft Word object for Spelling checking and correcting. Now I want to add new word in Word dictionary using Word object. Can anyone guide me how to achieve my goal. Any suggestions will be appreciated. Thanks and Regards. Sakharam ...more >>

Hi, I am writing a window service and I wonder should I use my own event log or should I use one of the predefined event logs? Thanks in advance ...more >>

Hi to all, i populate a ListView with data from a datareader and i just want to know the column name of the cell that the user clicks on. E.x., if the user clicks on the 2nd column, 3rd row in the ListView, i want to get the string that the column header displays. How i can do that ? ...more >>

I have been trying to build a screensaver that will connect to a database and display specific data depending on the user that is logged in. I have managed to get a simple data access screensaver to work, however, i can't get the application to work with some prebuilt assemblies i have. Also, ...more >>

I always use the word "class" to describe a class that can be instantiated. However, I don't get the concept of "Type" or at least I don't know how to use the word properly. If I have a class called Person, what is its "Type" and how does it relate to the class? Thanks in advance. mark ...more >>

This is probably a simple one to answer, but I can't seem to find it.... When in VS designer, I have some components in a panel, which is docked to FILL..... Sometimes when I drop a component on the form, it ends up 'behind' the panel, and therefore can't be seen, despite it existing.... ...more >>

What is wrong with this code ? I get message "Attachment.bmp". Bitmap bm = Bitmap.FromFile(@"..\..\Attachment.bmp") as Bitmap; //use the color from 0,0 as tranparent //uncomment this line to make the blue transparent bm.MakeTransparent(bm.GetPixel(0,0)); imageList.Images.Add(bm...more >>

Hello, I need help as soon as possible. I have installed Visual .NET 2003 Professional on Windows XP O/S in my classroom. I cannot DEBUG using a an account that does not have ADMINISTRATOR rights. Error message "access denied" occurs. The account is in the DEBUGGER USERS group, but it...more >>

Looking for Internet Componets : anything comparable to IP Works? Hi, I need a suite of components that provided me with SMPT, POP3, NNTP, Telnet and Ping protocols. I have been looking and found "IP works" actuallly works very well, just it is a bit pricey ($400.00). Indy seems to wor...more >>

Hello all, I have the following problem that I can't seem to solve. I have a database with 6 different tables. when I update the tables I have no problems expect with 1 table. I get a "the instruction Insert contains a syntax error" (I translated this to english cause I get the error mes...more >>

Hi, I want to manage a rubberband For that, I use the "controlPaint" class. No problem to draw my rectangle, I use "DrawReversibleFrame()" No problem to draw my selection, I use "DrawSelectionFrame()" No problem to draw my hands, I use "DrawGrabHandle()" But after, I don't know how to do to er...more >>

I have a default button on a form, but when a certain textbox has focus, I want to intercept Enter key events and perform a different action. Is there an easy way to do this, or should I just check the textbox's focus in the default button's event handler? Thanks in advance, Steve Murphy ...more >>

For authentication purposes I query my Access database using a Username and Password. If the dataset turns up empty then the user does not have access. If it shows up with a value in the dataset then the user is authenticated. The problem I am having is that when I count the number of entrie...more >>

I would like to know how to write a spyware program....more >>

I read in a Visual Studio .NET book that with C# it is now recommended to open database connections whenever you need to query a database as opposed to the traditional method of opening a database at the start of your app and closing it at the end. Their reasoning was that "opening a database...more >>

I'm building a relatively simple client-server app. One of the functions of the client is to notify the server when it terminates, this all works fine. The problem comes in when the server is stopped before the client, in which case the client "hangs", waiting to talk to the server. This is h...more >>

I have a derived DataGrid class that overrides the OnMouseUp event so that I can highlight multiple cells for cut/copy/paste functionality. When the user selects to open a new file via a OpenFileDialog dialog, the OnMouseUp event for the grid is called after the user presses the Open button o...more >>

I have a dataset that I need to loop threw the rows of the table. What is the best way to do this? -- D ...more >>

This should be an easy question. With all of my dataadapters, when I am done with them i do the following: DataAdapter da = new DataAdapter(); // do something with da da.Dispose(); Is that the proper way to destroy an object when I am done with it? Or should I be doing: da = Nothing; ...more >>

I need to create a read-only copy of Object X at run time, I know how to find the type of Object X (using GetType) but how do I go about creating a readonly copy of X? What I want to do is this: System.Type ValueType = Value.GetType(); create readonly object of type ValuteType and copy Value...more >>

I am using a com server to return a memory pointer to a C# program in .net. The code works fine when it is not in a thread. When it is run in a thread the pointer no longer points to the data the com server has. I am using a System.IntPtr to transfer the pointer. Are there marshaling issue...more >>

Hello group, I have irrational idea but I thing that this solution is good for me. In my apps I have custom class MyClass with few public, and private integers, two ArrayList etc. How serialize this class to dataBase. I need have completly object in one place. I know that I want create few t...more >>

Hi: I work in Csharp's parser files by LEX/YACC.Now I have only CSharp-lex.l and CSharp.y file,but they not have CSharp'comment Parse. this is a part of CSharp-lex.l. ..................... /***** Comments *****/ "/*" { yy_push_state(IN_COMMENT); } <IN_COMMENT>. ...more >>

Hello! A longer version of this posting was originally sent to the C# whidbey newsgroup, but it seems like those newsgroups don't get much attention from Microsoft. I'm wondering on the status of C# 2.0 and whether it's been fully implemented in the released betas of VS .NET or we can expec...more >>

I'm creating an MDI application with multiple maximized MDI child forms. When a child form is open, the title/caption is merge with the MDI's title/caption. So, if the MDI title is "Parent" and the 3rd MDI child is "Child 3", then when the 3rd MDI child is opened, the title becomes "Pare...more >>

I have an application that I want to use an embedded database in. I started with MySQL and ODBC (client server model) but want to change that. I found SQLite http://www.sqlite.org and found it promising, a single dll-file contains all the needed functions. I'm new to C# but I found that I have...more >>

I am building a windows services that accesses files on another machine in the domain. My understanding is that I should use NT AUTHORITY\NETWORK SERVICE as the account to run the service under if I want to access resources on another machine. However, I get Access denied. I can't find very...more >>

All, I have a situation where a Server exists in a stand alone workgroup on an Active Directory domain. The server can access domain resources with the correct domain security information provided (for example I can map a drive from the server to a server in the AD by connecting as a different...more >>

Hello, I need a control which will contain radio buttons that will be added in a loop. I am using this control a source of some other control. I tried to use group box windows control and to add the radio buttons this way(in a loop): this.groupBox1.Controls.Add(radio); but I can see there o...more >>

Does anyone have any sample code, or references to help when calling SQL DMO to backup / restore DB via C# Thanks ...more >>

Does anybody know if it is possible to write software that works across multiple monitors? and if so, is it possible to program one so it is private to the user / administrator and the other public. i.e they both show different things. Or even better- the private one shows both screens and the...more >>

Hi I have the following code which runs ok from a button click event private void btnCompact_Click(object sender, System.EventArgs e) { string mdbComp = @"C:\Compact.mdb"; string mdbTemp = @"C:\tempdb.mdb"; JRO.JetEngine jro; jro = new JRO.JetEngine(); jro.CompactDatabase(@"Provider=...more >>

between STAThread and MTAThread?...more >>

Greetings, I am new to C# and programming in general. Taking the self study route with an associate in an attempt to increase skill sets, and potentially start a business of it. Just wanted to introduce myself to the group. Thanks for being such a great resource!!! --------------- tm...more >>

Hi I'm attempting to pass a string into another string but I get an error This code work ok jro.CompactDatabase(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Compact.mdb", @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\tempdb.mdb;Jet OLEDB:Engine Type=5"); However when I declare ...more >>

Hi all, I want to create an application that downloads a user defined webpage and does makes some content analyzes. Basically download (only the text) and write it to a buffer. Someone knows what classes I can use for this? Regards Stijn...more >>

I recently had to modify an application that had originally been written for SQL Server to work with MySQL. I found myself replacing all of the declarations for the connection and command objects with their MySQL class equivalents. In hindsight it is clear my code should have been written ...more >>

Hi, I created a form which contain one Image and text box. I wnat to make the image as imageMap like HTML MAP and AREA tags. In image, when i click some part( region ) of the image , i will directed to a image click event handler and if i click another part i will be directed to anotehr eve...more >>

Hi, how can i connect to mySQL server and keep the connectivity in a public area so that I can use it fro all forms within my application... Many Thanks, Jassim Rahma *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

Hi, what is the best way to populate comboBox from database.. the reason I am asking is that i have more than 8 comboBoxes in one form and each should retrieve data from a table and I don't want that to slow the form show. can you please submit a sample code... Many Thanks, Jassim Rah...more >>

Hi, why when I design everything in design time (IDE) including the size and location, then when i run the program everything looks different!!!the size, location, etc is totally changed!!!please help... note: I am using a localized application, Arabic, Right to Left. Many Thanks, Jassi...more >>

Hi, How can I directlly connect to mySQL server from C# without an ODBC drive? connecting through ODBC means I have to include mySQL Connecter/ODBC in my distribution media.. I want to only distibute my application.. Many Thanks, Jassim Rahma *** Sent via Developersdex http://www.deve...more >>

I'm trying to add another button to a window's title bar to use as a "keep this window on top" button. I've managed to draw the button using the code below (C#) but I'm having a couple of other problems... .... private bool buttonChecked = false; private int buttonSize = 16; private int bu...more >>

Ok, I populate the combobox just once upon page "initializecomponent": PaperSource pkSource; for (int i = 0; i < printDoc.PrinterSettings.PaperSources.Count; i++) { pkSource = printDoc.PrinterSettings.PaperSources[i]; comboBox1.Items.Add(pkSource); } Now, I want to programatically select ...more >>

I want it to go to another winform when I select from the combobox. I tried this with a populated combobox: private void comboBox1_SelectedValueChanged(object sender, EventArgs e) { if (comboBox1.SelectedIndex != -1) { PrintDocument printDoc = new PrintDocument(); printDoc.DefaultPageSe...more >>

Recently I had posted a query about intermittent problems with a C++/Interop scheme (unmanaged C DLL wrapped in unmanaged C++, wrapped in managed C++, all accessed by C#). The system works fine when unstressed, but fails under stress. Well...I just noticed short mention in Prosise's book, of ...more >>

I am moving over to C# from VB.NET and am having some problems replicating functionality that I could do in VB.NET. In VB.NET I used to use the code Dim frm As Object Dim frmType As Type Dim SampleAssembly As [Assembly] SampleAssembly = [Assembly].Load(strLibrary) frmType = SampleAss...more >>

Hi, I have come across codes like this if(dbConn != null) { dbConn.dispose(); } and sometimes like dbConn.dispose(); if(dbConn != null) { dbConn = null; } I was wondering what is the correct way of cleaning up? Thanks Joey...more >>

The documentation has the following remark for the ReadBlock method of the StreamReader: "The method blocks until either count characters are read, or all characters have been read". What kind of blocking are they referring to? Are they referring to the BaseStream being blocked so that no o...more >>

Hi All, I'm wondering how way in C# to alter a file's attributes? I'd like to be able to change the created date, etc. Thanks in advance, Barry....more >>