I just started with C#. How do I navigate on a dataset by changing the value of a textbox or other simple bound controls? Imagine that I have the customer name on a textbox and have a datagrid with the orders that will display the orders of the customer that the user enters on the textbox. With...more >>

Present I am using Windows.Forms.Timer for reminder. But I want to sleep on events and when every event wake up they call my code. Please give the coding of the below example for example : let us say I have three reminders.. one at 10am, one at 12am and one at 2pm same da ...more >>

Hi, Does anyone know how to get an offline reference to an assembly that has been downloaded using Assembly.LoadFrom. E.g. Application downloads the assembly while it in online... next time it is run it is offline and needs to still use that same assembly. Assembly.LoadFrom throws an exceptio...more >>

HI, I wanted to develop an applicatioin which has to show current currency rates to to our clients (i.e. 10 currencies and 3 or 4 changes in our data in one second) and client may buy or sell his lots. Please let me know if TCP/IP is right protocol to use or should I use something else. and p...more >>

Hello, Are nested function calls inefficient (or inherently evil)? In Delphi I've seen small but significant performance improvements by always declaring a local variable and 'unwrapping' the nested calls, but I'm not convinced it is necessarily so in c#. So for example: public struct T...more >>

I'm triyng to use this function int result = NativeMethods.midiOutGetDevCaps( -1, ref pSI, (uint)Marshal.SizeOf(pSI) ); Docs say that pSI is a struct (below) [c++] typedef struct { WORD wMid; WORD wPid; MMVERSION vDriverVersion; CHAR szPname[MAXPNAMELEN]; //...more >>

Hello I have writen a contact form in c# using system.web.mail I can not figure out how to clear the form once it has been e-mailed. Any ideas? Mike ...more >>

Hi.. I'm making a OleDb connection to a access database.. I can fill the dataset fine and view the data, but when I add a new row and try to update the db I get this error. Any help would be appreciated.. Error: An unhandled exception of type "System.Data.OleDb.OleDbException' occurred in sys...more >>

Can I debug my addin written in C#? If yes, how??...more >>

Languages such as Simula 67 contain a general concept of coroutines that allow the execution of a method to be suspended without rolling back the stack and then later resumed at the same place as it has been suspended. The C# iterators seem to be a special case of this general suspend/resume c...more >>

Hi, I have a question on interfaces in C#: I have a simple interface that is implemented by a class. However, the class accessibility modifier is internal, while all interface members are public by default. What is the accessibility of the implemented interface member? Here is the code sam...more >>

See: http://www.ai.uga.edu/mc/SingleInstance.html While attempting to use a mutex to allow only one instance of my app to run at a time (Recipe 4.12 in C# Programmer's Cookbook), I found that if the mutex is in a local variable in Main(), and my program launches any windows before Application...more >>

Private Sub Button1_Click _ (ByVal sender As System.Object, _ ByVal e As System.EventArgs) _ Handles Button1.Click Dim cntrlTester As Control Dim chkTester As CheckBox Dim sb As New System.Text.StringBuilder For Each cntrlTester In _ Page.C...more >>

Hi Group, This seems a peculiar problem. I am wrirng this code for creating a Remote Server=20 Here I am not able to access the namespace.=20 System.Runtime.Remoting.Channels.Tcp Wts wrong with this one?? Does MS have removed this namespace? and if yes, whats the actual = namespace ...more >>

if i put the same code at the windows application or console, i can logon to the computer. but, if i put the same code at the windows service and start it, i still can't logon to the machine. the return value is TRUE. i tested it by going to windows explorer and then click that computer. ...more >>

Hi, we have a (unmanaged) ATL COM server, which implements two interface: ITestInterface1 and ITestInterface2. Both of these interfaces also support the ISupportErrorInfo-interface. Interface implementation is divided into two class: CTestInterface2, which implements the ITestInterfac2, and...more >>

Hi Group, Is there any method in C# search to ingnore the different between some data which are "same in concept" but different in "the way are stored" ? Let's say I'm doing a search against an xml data item like : "What is your name?" but it's saved as "what is your name?" Any...more >>

Hi, I am compiling a C# Strong named project on two computers, on one computer the project is being compiled successfully and on the other it generate the following error: Cryptographic failure while signing assembly 'D:\...\NPSPool\obj\Debug\NPSPool.dll' -- 'The key container name '.\NPSPoo...more >>

Like c++, is there any way to apply formatting in c# like println("%c",i) ? ...more >>

Values altered when I convert from string to float and back again: using System; class FloatTest { static void Main(string[] args) { string var1 = "800856.22"; Console.WriteLine(var1); float var2 = Convert.ToSingle(var1.Replace(".", ",")); Console.WriteLine(var2.ToString()); ...more >>

Hi, I want to use C# to access an MS Access database which has been setup a password by using Set Database Password in Microsoft Access application. How can I do it? Please help! Thank for your help. Z. Su ...more >>

I am working on an existing .NET (C Sharp) component that had a com interface that was used by a VB component. When it was originally written, it had the SSEAssemblyCom class below - minus the two last methods (for space I modified method names in my example below). I added those. Everything ...more >>

I'm trying to determine if I need to make my application multi-threaded, or if it can be done with asynchronous programming. I realize that asynch calls do create a new thread in the background, but when they come back, they return to the thread that launched them, is that correct? If I go multi...more >>

Hi Group, I have a problem with XML! I have an xml file which starts like this: <Plaftorm PlatformName="empty" PlatformID="1" StyleUsage="URL" xmlns="http://www.domain.com" PatformProgrammer="mynamehere" DateTime="09/12/2003 6:00:54 PM"> ....... ...... </Plaform> When I changed it t...more >>

I want to copy a parent class instance's all datas to a child's. It's actually a C++'s copy constructor. But why the following code does not work - there is a compile error! How it should look like? (The background is I don't know (I don't care indeed) all members in DataGrid, so I don't want...more >>

Hi, I have a dll that needs to be registered for an application to use. I can use regsvr32 xxx.dll, however, I'd like to automate this process in a VS setup installation. I've created a VS setup project; added the dll to the setup and set it's propery to "vsdrfCOM". After installing, the dl...more >>

I have a readonly textbox that displays a message in Red under certain conditions and default if not. It defaults to "grey" initially (the readonly color), however, if I switch it back to default using "textBoxArray[i].BackColor = System.Drawing.SystemColors.Window;", it displays as White, makin...more >>

Im using Environment.GetCommandLineArgs(). However some of the arguemtns passed in have spaces, so I enclosed them in "". For example: "c:\temp\My area\" The problem is when I access this as an element of the string array it treating the last \" (And maybe others" as escape character...more >>

Hi, Is there a function that can check if a string can be parsed to an int? (Without using try{}catch{}) Thanks, Jose. ...more >>

I just started with C#. How do I navigate on a dataset by changing the value of a textbox or other simple bound controls? Imagine that I have the customer name on a textbox and have a datagrid with the orders that will display the orders of the customer that the user enters on the textbox. With...more >>

I need to get byte values from an object into a byte[] in order to write the bytes to file. An object (vSound) is passed to a function. From the Autos window I can see that the Value of vSound is {System.Array} and the Type is {System.Object}. vSound has no properties or methods that allow yo...more >>

Hi. I want to save a DateTime value with format like "2004-02-11T12:11:17.0000000-05:00" using XmlTextWriter. I think I should write codes something like: StreamWriter sw=new StreamWriter(FileName); XmlTextWriter writer = new XmlTextWriter(sw); // ... writer.WriteStartElement("FileTime")...more >>

Hello All, I have an application that is written in c#, this application calls a native (not managed) c++ dll, the connection is good and the functions run great, I have a problem entering the c++ code in debug mode (when trying to step into to the code). This could be a big problem for me, if ...more >>

I am attempting to making a app that has similar dockable toolwindows as VS.Net. Are there any free libs or tips on how to do this?...more >>

How can I reuse an object that is already defined. I want to delete some files using the FileInfo class and the "name" is a read only property so I can't set the name as I want to. I don't want to delete all the files only a few of them in different Directories For example this gives me an error...more >>

Hi All I created web user control that has a few properties and an Update method. These controls all get initialised and configured (all properties set) at the page load event. Today I included an if(!this.IsPostBack) {} around the initialisation code, so that if an error occurred when the ...more >>

I'm using one of the Graphics.DrawString() methods to draw a string on a surface. I want to know how long (in pixels) the rendered string will be. I've looked at the Graphics class, but can't find a method that does this. Is there a way to determine this? TIA! ...more >>

i have created a windows application, but i didn't use any form and control indeed (like console application). by default, there's a Form1 at the project, can i remove it or hide it so that it hehaves like a console application. thanks! ...more >>

Is it something like e.char == ''? ...more >>

All, I want to write a big binary stream that was getting from WebResponse.GetResponseStream() to a file. Anyone can help? Thanks, Rudy ...more >>

aargh! what's wrong with the following snippet? i'm trying to use PrintWindow with a RichTextBox. [DllImport ("User32.dll")] public extern static bool PrintWindow (System.IntPtr hWnd, System.IntPtr dc, uint reservedFlag); System.IntPtr hwnd = rtf.Handle; Bitmap bm = new Bitmap (rtf.Siz...more >>

I've got a DataTable, see? I'm pulling it from a stored procedure, dig? I've gotta push it to an array for calculating certain columns, then spit it to a web page. With me so far? The datacolumns are dates, doubles, strings, man. How do I store all the different datatypes in a multidimensional ar...more >>

H when i execute this query, my query is crashing throwing an exception "cant convert char datatype to datetime type format my query is "insert into mytable(mydate) values ('"+ varmydate+ "') iam passing date format as dd/mm/yyyy my system date is in format dd/mm/yyyy is there any proble...more >>

does anyone know of a well supported control that emulates the left hand panel in XP File Explorer? source code available in c# would be nice, but well maintained is the most important. Here is one that looks great but is an ocx: http://www.innovasys.com/products/explorerbar.asp. ...more >>

I want to build a rules engine in a rules.xml page. I was thinking it would look like this: - Rules - rule1 if (0 < iTime <= .5) { iFee = 15; } - rule2 if (.5 < iTime <= 1) { iFee = 20; } - yada yada Now lets say in my c# code I loop thru the Rules node of rules.xml, a...more >>

....and recompiling it again Hi all, I've got an Assembly DLL and associated .NetModules and want to amend a function in one of the .NetModules I've used ILDASM to decompile the .NetModules into IL so I can modify the code but am having trouble trying to compile up the .NetModule and eff...more >>

Hello, have anyone .NET DHTML Components for downloading? I want to write an own Editor and search for those components. Volker ...more >>

Hi All I am creating a C# app, in which there are some methods that are considerably longer than the others and take a few minutes to complete, I want to give the users an option to stop that method (which is in process). I want to include a command button using which the user of the app, can stop...more >>

Hi, I'm trying to get a list of COM ports on my machine using the API GetDefaultCommConfig. I've found an example in VB of how to do this but wanted to C# it up. This works fine but is very slow in C# In VB it searches for 16 COM Ports in less than a second. In C# it searches for 10 ...more >>

Hi I am using CDO 1.21 from C# in order to iterate through the entries in a users outlook address book (as OOM was too slow). Basically I take the Name field from each "message" and insert it into a ListBox. I shall paste my code at the end, and describe my problem first If I call my MAPI.Sessio...more >>

hi guys, i am currently studying through my book and wonder if somebody could clear this up before i have to look at other sources. I have code which defines and creates an event object using a delegate as the handler as thus.. //Start of code using System; // Declare a delegate for an e...more >>

Hi all, I need someone to push me in the right direction. Most of my projects at work are small tracking applications that help people generate month end production reports, i.e. (This many users did this many items between these dates). I have already developed several and they all do pre...more >>

I have two strings that I would like to compare. To guarantee the compare is not affected by trailing spaces, I would like to remove them. Will this do: MyTextBox.text.ToString().Trim()? ...more >>

I would like to create a program that will monitor up to 15 different servers over a WAN link. Actually, what I am thinking is that I will develop an application that will be installed on each of these remote servers. This application will do one of the following: 1) Write to a SQL Serv...more >>

hi all, I want to add minutes in a time which is already in string format. string time="12:30"; Now add 30 minutes in it how to do that?? plz help..... Regards, Ibrahim Ibrahim@islamabad.net Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------...more >>

hi I have used the System.Web.Context class to hold my Web application settings in cache for use Is there a way to do the same with a windows application to hold those settings in a cached state I have looked all thourgh the .Net Framework looking for an eqiveliant class but i am have trouble fin...more >>

I have the following cod private void btnUpdate_Click(object sender, System.EventArgs e TextBox tbMembers = new TextBox() tbMembers = (TextBox) dlClubs.FindControl("tbMembers") string sqlUpdate = "UPDATE tblClub SET " if (tbMembers.Text.Length > 0 sqlUpdate = sqlUpdate + "Mem...more >>

Hi Al When I have a text box, list box, and a datagrid, how does a CurrencyManager relate to all these controls(seeing as though the datagrid uses Complex binding and textbox and list box use simple bound. So for example if I have a text box, list box and a Datagrid on a windows form, and I want t...more >>

Looking for the be all end all answer to this issue. 1) Yes, i'm running in the Debug mode and not in Release 2) Yes, the timestamp on my pdb and dll file are in sync 3) Yes, i'm tried deleting my project and fetching our source tree again 4) Yes, the Module window shows that all symbols are ...more >>

Hi, can anyone tell me what ist wrong with this code ? TextBox[] txtField = new TextBox[4]; txtField[0].Text = "Hello"; I get the error : An unhandled exception of type 'System.NullReferenceException' occurred in PentaEngine.exe Additional information: Object reference not set to an ...more >>

I am having some trouble w/ a school project database that I am doing. The database is used for a ski rental shop. In the rental table I have various customers w/ rentals on different days. I have a combobox that selects the customer number from my customer table. What I would like it to do is p...more >>

Hi all... I searhed for a code to save and retrieve image from SQL database using Data adapter but I didn't found anything. Thanks, Bassem....more >>

Was wondering what the iteration depth limit is in C#? This is in the context of a recursive (LOGO) parser, wether I should watch the level or not. Thx!...more >>

Hi, I need to a select the last entry in a sorted combo box. The index isn't a set number so it could be any number... it is populated on form_load. Any idea's?? Thanks /Jonny...more >>

Hi, I recently was at the MS dev days and some speaker mentioned that there is a cool feature that allows edit/continue, so you can debug, edit and continue without recompiling. But, this feature was only for VB, because the development team thinks that c# developers aren't interested in such ...more >>

As I have looked all over, even MSDN, I cannot find much on iis management using wmi in c#. Does anyone have sample code or any documentation. If so please email to me bduffy@no.spam@4duffy.com remove no.spam@ of course --- Outgoing mail is certified Virus Free. Checked by AVG anti-vir...more >>

Hello, i tried to compose myself a custom usercontrol which is derieved from System.Windows.Forms.UserControl. It contains 2 comboboxes and one textbox (which are also custom controls, but directly derived from the .net classes ComboBox and TextBox) I did the custom control in the visual...more >>

I just started with C#. How do I navigate on a dataset by changing the value of a textbox or other simple bound controls? Imagine that I have the customer name on a textbox and have a datagrid with the orders that will display the orders of the customer that the user enters on the textbox. With...more >>