Let's say I have a program.exe file. When I run it, one instance of it will be created. If I run it again, then another instance will be created. Question is, is it possible for instance #2 to issue command to instance #1, or vice versa? Thanks ...more >>

The following piece of code (between comment /***************/ line )works fine. You can test is in console/win form/web page. Just print strResult. /**************************************************/ public delegate double DlgFn(double x); public static double f1(double x) { ...more >>

I have several objects that I'm saving to disk via the XmlSerializer. 80% of the time this works fine, but occasionaly it will create a file like this: <?xml version="1.0"?> <SystemOptions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> ...more >>

Hi, I'm looking for a way to generate documents from my source files. Like in Javadocs. Anyone? (Thanks in advance) ...more >>

public class BusinessObjectGeneric<EntityType> : BusinessObject where EntityType : BusinessEntity, new() { public BusinessObjectGeneric<EntityType> () { } ..... causes error in constructor declaration: Error 1 Invalid token '(' in class, struct, or interface member decla...more >>

Hi, I want to remove the row then add the fresh new one, so I don't have to decide to update or add. I always add, because I delete any existing row. However I'm stuck with the error below: Violation of PRIMARY KEY constraint 'PK_dtotel'. Cannot insert duplicate key in object 'dtOtel'. ...more >>

www.BrandonsMansion.com ...more >>

Hi, I know this will sound like a lot of hand waving, and I'll be glad to supply some sample code if necessary, but I thought something obvious might jump out at someone without doing so. Anyway, I have a structure that has several members including an array of strings. I assign the eleme...more >>

Hello all, is there a way to reboot my PC with a c# command? I don't mean 'shutdown -s' or some other command. I mean a hard interrupt (INTxx), like pushing the resetbutton on my PC. Thanks for your help Frank ...more >>

Once file is open, it should be closed: Stream fs = new FileStream(filename, FileMode.Create); try { // write, exceptions may raise here } finally { fs.Close(); } What should one do to remove the file in case of an error? ...more >>

Hi all, In the following example, I'd like to replace int by a generic. In order word, I would like to replace int by float, double, byte or something like that. I've tried to find a common interface or something like that, but I didn't find. public static int MaxSum(int[] source) ...more >>

How do I use this, the example in msdn is basically worthless unless you want to check something against a static string or something. I need to check in my list if there is a duplicate entry, how do I do that? I have a collection of supplier objects. Supplier Name ID Count ...more >>

I have created a GridView and dynamically added data to it by creating a DataTable(as advised) and bound it with a reader. Then, assigned the DataSource of GridView to DataTable. But even that aint working as alternatively assigned reader obj. to datasource of GridView. Here is the code f...more >>

I add new row to DataTable (typed). I called TableAdapter.Upadte method. I noticed that field 'ItemId' (which is specified as Identity in SQL Server) has a value of new added item. This is great! Is this feature documented? Can i use it in production? I also noticed when using Access, Au...more >>

I am using: Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException); But, my function is not run when an exception is thrown on another computer running WinXP SP2, and I have no idea why. Instead, the Windows error report screen appears....more >>

I got a System.IO.IOException in my app on another computer, so I couldn't debug it. I don't think it was a HD error. What else could throw this? Could it be from reading a webpage from the internet through a stream? Zytan ...more >>

I've got a parent object that is a collection and it in turn is hosting 2 child objects. My searlization has worked perfectly to plan in as much that I wanted to dictate the names of the objects and properties via XMLatrributes with a prefix of "THE_.."....except for the name of the child object...more >>

Hi there, i've created a little test app where i send an email to myself and = select a number from a combobox how many times to send it. My sending function is called void doMailSend() { //send the email here... } and it works fine with threading, however i want to pass an incrementin...more >>

I am trying to change the colors of the ProgressBar control, using ForeColor and BackColor, but this doesn't do anything. Does anyone know why? I wonder if it has anything to do with Windows insistence on drawing the ProgressBar with the block display, instead of one smooth bar, even if you as...more >>

Hi all; I have a windows desktop application in which I have set as a background image, a graphic that I whipped up. Its nothing fancey, just some gradient colors, shadows, glow, that sort of stuff. I have tried different formats, jpg, png, gif, bmp, and with every one, when the application...more >>

Hi. I'm using VS2005 Express for C#. How do you clear all breakpoints without having to find them one at a time. In previous versions of the C/C++ IDE I could just use Ctrl+Shift+F9, but that has no effect now in the C# version. Thanks...more >>

Hi..need help comparing types example method istypeof(object someobj) { if (someobj=int32) } ya kinda get my idea here.... MJ ...more >>

I am coding with C# in Visual Studio 2005 for a database application residing on remote MS SQL Server 2005. What I want to do is open the same form but from 2 different places and only one instance. I currently have the form where it will open from a double click on datagridview from another f...more >>

Hi there, Does anyone know if this (example) is safe: [DllImport("user32.dll", SetLastError = true)] internal static extern int GetWindowRect(IntPtr hWnd, ref RECT rect); int rc = GetWindowRect(hWnd, ref rect); if (rc == 0) { throw n...more >>

In a program that I'm converting from VB6 to C# (VS .Net 2003 not 2005) there are a few DDE calls and they obviously don't work anymore in .NET. I'm trying to find an easy way around this because there are only 3 lines of code in the app for DDE. frmDialer.txtDDEPop.LinkMode = NONE fr...more >>

Hi all Is there any way to create an instance of a class using its type? I mean something like this: private void util() { object a = null; a = CreateObjectByType(typeof(MyClassA)); } private object CreateObjectByType(Type classType) { ... } Thank you ...more >>

Hi all, Right now, I'm debugging a C# library by starting an external application. To do this, I go in the project settings of the C# project, go in the Debug section and check the radio button "Start external program". I then specify the application that will start my library. I was won...more >>

Hey, Is it possible to set a value for a private variable from outside the class in which it was declared using perhaps reflection? Something like class A { private string s; } class B { private void Foo (string str) { A a = new A (); // Here I need a way to set the val...more >>

Hi, I would like to build my own controls from the ground up. Just as if the Combobox didn't excist and I wanted to create this 'new control' with all is glorious functionality. Is there a technology used for this purpose in .net. Regards Jesper....more >>

[lo ...more >>

Hello, I've got a problem which I can not locate. I will try to describe it and would be glad, if someone had an idea how to identify the cause of the problem. Situation: My application prints labels to a label printer (Datamax E-4203) via PrintDocument. The PrintDocument prints a new p...more >>

Hi, I have an application which does some file manipulation. While the file manipulation takes place, the timer in the statusbar freezes. How can I tell the timer to run on a different thread? Also, my UI freezes if there is a big file to move. I have a label on the form which shows t...more >>

Below is the code I wrote but it aint working.... : It throws an exception on DataBind() statement that "the source does not support server-side paging". PLz Help. Really stuck. protected void Button1_Click(object sender, EventArgs e) { int AtmtransId=3D-1; if (Sess...more >>

Hi all, Let's suppose we have this: byte[] buffer = new byte[3]; buffer[0] = 0x04; buffer[1] = 0xF1; buffer[2] = 0xB4; int Res; 'Res' needs to be the concatenation of all those bytes. I mean, it should be something like Res = 0x04F1B4 which converted to integer is 324020. ...more >>

Hello. I have a windows service running that listens to a port and makes insert queries in a database. I need to make an interface, so my idea is creating a simple windows application that just shows messages from the service. Can I do that with remoting? What are the main steps to do that...more >>

I have a class that is generic and can only be used with numerical types like double or decimals A example code is: class<NumType> { public NumType Test(NumType Val) { NumType d = 0.0; //The problem is this line. This will not compile with the error: Cannot convert type double to NumType...more >>

Hi, In a normal Windows.Forms.TextBox control, I want to be able to select a text (ie highlight, this is by default possible) and than be able to drag that text through my mouse pointer to another textbox, or any control, than drop it. How do v do this? Regards, ...ab ...more >>

Hi, How do I prevent row high (user can't change row high) in DataGridView? Thx PawelR ...more >>

Hi Group, In my application I have DataTable which is displayed in DataGridView via DataView: DataView myView = new DataView(myTable); myDataGridView.DataSource = myView; One column im myTable is boolean (two state - without null value). How can I change value in this column after click ...more >>

I've got a combobox where the SelectedValue property is bound to a class property by a code like this: MyComboBox.DataBindings.Add("SelectedValue", MyClass , "MyID"); My problem is that the MyClass.MyID property gets updated when the focus leaves the combobox - not when you actually select...more >>

Hi i have an app that i am writing and i have a help file that is called by the help menu. I would like to associate this help file with the F1 key but when i use the following code, i dont get the help file up. private void F1_keyPress(object sender, EventArgs e) {Help.ShowHelp(this, hel...more >>