I just want to create a large file with size of 80MB and add a char 1 at the end. Two method I has been used. i) seek to the End and write one char ii) open the file , and append it to the end both method take nearly 30sec to do so I want to ask whether they is other method can do this job ...more >>

Hallo I have a pictureBox with a picture loaded from file, then I draw some lines on the picture, and then I want to save the new picture. Befor I can draw lines I have to create a Graphics object, with g = pictureBox.CreateGraphic, and draw lines g.drawLines(....) But when saving the pic...more >>

Hi everybody I was wondering if it is possible to use SendTo to send a whole IP package including header to another IP than specified in the package. Say I have a complete package and in it the destination IP is set to 10.0.0.3, but now I want to send the package to a server which has dest...more >>

Hi, How can I open a web site in a new browser window from a regular windows form? (not an ASP.NET) Do I have to use a COM ActiveX control or is there anything like that already built in in .NET? Thanks, VR...more >>

If I have an object o and want to check if it's a certain interface, I write like this: bool oIsIMyInterface = o is IMyInterface; However, if I have a Type object t, and I want to check if it's a certain interface, I have to write the interface name as a string: bool tIsIMyInter...more >>

Hello all, I have an application that is using some picture box controls that are being used to preview jpg files. The jpg files are created on the fly and will be overwritten when needed. The issue I'm having is that when I release the picturebox resources, they still seem to be hanging on ...more >>

I'm making a graphics heavy program, and I need to allow the user to click on an image or block of text to select it, drag it around a page, and resize it if necessary. Rather like the Windows forms designer. I haven't the slightest idea how best to do the resizing handles, and moving the images ...more >>

Hello, I'd like to verify if an IP address (as an IPAddress parameter) is in a range defined by two other IP addresses (also passed as IPAddress parameters), something like IsLoopback() but not only for 127.x.y.z and not only for x,y,z in the 0-255 range. There is an Equals member function ...more >>

I've been using Visual Studio .NET 2003 with C#, and I find it annoying that some sort of address (unique id / hash code) isn't displayed when objects are printed in the debugger (e.g. {System.Data.DataRelation 235} rather than just {System.Data.DataRelation}). Doing this would make it visibly a...more >>

Hi I have created a User Control. I want to set Dotted Border when the control is getting focus and also set it back to solid border when it loses its focus. How to do that? Thanks and regards Karuppasamy Natarajan ...more >>

I'm looking from an algorithm that will do a statistics calculation for me-- it's the first time 'Numerical Recipies in C' has failed me! A normal distribution table tells me the probability (by percentile) of an item, given something called a z-score. If I have a z-score, I can look up the pro...more >>

I have a webservice which implements a webmethod called PrettyXML. This webmethod loads an XML file and returns the XML, which is then displayed in a webcontrol (textbox) on a webform. If no XML file is found, it just returns null atm. I would now like to alter it so that if the XML file is no...more >>

Does anyone know what might cause an Error 48 0 when loading a dll from C#? The dll is in VB. ...more >>

Does anyone know if when writing a multi-threaded application that C# will just run all threads on one processor? Another question will Windows 2K take the threads and, if it deems necessary, dole the threads out to the other processors? Is there a way to tell the thread to run on anoth...more >>

Just wondering if I need to add a Mutex around this section (and if so, where) where multiple apps will be making the static method call: public static bool GetDBConn(string dbName, out string connString, out string dbType) { string XMLPath = ConfigurationSettings.AppSettings["xmlFilePath...more >>

I have a pdf that is contained in a byte[] array in memory and I want to display this in a browser window. The window will beopenned when a button is clicked on the current web page, i.e. a second browser window is displayed, preferably with no menu or tool bars.... Cheers Jim ...more >>

Dear all, I am writing to a C# program to connect to the telnet server and getting data; however, I know that I can use either TCPClient and Asyncronous Socket to do the program. However, I don't know which is better and why. Can any one tell me about this? Thank you for all of your help. ...more >>

Is there an easier way to create HSplits and VSplits as currently its a pigs mess and over involved for what it is. Will this be improved in later versions or are we stuck with this pigs mess? ...more >>

What Class.Method should be used to Open a file on the file system so that the appropriate program is run and the file loaded into it. Just like as if the user double clicked the file in file viewer. i.e. if I Open a .doc file and MSWord is set to open .doc files Word comes up with the file loa...more >>

I know you cannot have string enumerations such as: enum myStringEnum { enumItem1 = "value 1", enumItem2 = "value 2", etc } However, I was wondering whether you had ever created something that would mimic this? I have tried the following: struct myStringEnum { public const string Enum...more >>

Hi; I want to serializate TextBox Control, i try it ,but don't work. How to serializate TextBox Control? Ths Ekey ...more >>

All, In my Windows based .NET C# application I tried to change a form's background color to non-gray. The form backround color change had the desired ripple effect for most controls on the form however it had no effect, and is a problem, for: - a TabControl {not a tabpage - the tabcon...more >>

Is there a way that I can control exactly what happens when the user presses the return key in a TextBox? ...more >>

I have a DLL (not .NET) that takes a function pointer argument and calls that function with an integer argument. The DLL is being called from C#. So far, it is partially working, but the integer argument is getting corrupted (MessageBoxes in the dll and C# fire). I do not understand why...more >>

Just finished reading about upcoming features in 2004 version of VS.NET and C# in particular http://msdn.microsoft.com/vstudio/productinfo/roadmap.aspx# whidbey Looks good and I am very happy (about generics, split types...), Except 1 thing Microsoft is reintroducing the "Edit and continue" ...more >>

How can I find out what the *instance* size of an object is? I know i can use sizeof() on value types, but using it on an objhect reference only gives me 4, which simply means that the reference is a 4 byte pointer. How can I find out how big the referenced object is, i.e. the total size of al...more >>

What is the best way to index an array by an enum. Pascal has a nice feature in that arrays can be indexed by an enum, for example type ButtonType = ( Left, Middle, Right ) ; var buttons : array[ ButtonType ] of Button ; .... buttons[ Left ].Enabled := true ; It appears that th...more >>

Hello, I have problems to implement a C# component which is called by a VB6 application through COM. A method Item accepts a variant as a parameter which can contain either a string or an integer (as an index) to access a collection. In certain cases, the integer I extract from the varia...more >>

The documentation of DataTable.LoadDataRow() has a major omission. To quote: "Finds and updates a specific row. If no matching row is found, a new row is created using the given values." What this does NOT tell you is that it ignores any rows which have the INSERTED or UPDATED flags set. ...more >>

Hi, I have a Windows Service C# application. How can I get the full path of the application exe? Thanks, Ronen ...more >>

Is there any way to programmatically select a particular client certificate and associate it with an HttpWebRequest instance? I know using WinINet this was possible. Erin. ...more >>

hi i have a simple question about ArrayLists. Normaly ArrayLists will be accessed by index-number. ArrayList arr = new ArrayList(); arr.Add("test"); String str = arr[0].ToString(); Now, i'd like to access not by index-number. i'd like to access by index-string like......more >>

I have a TreeView, with an ImageList. The ImageList's size is set to 20x15, and all of the images it contains are 20x15. When I use it with the TreeView, though, all of the images are scaled to what looks like 16x16. Is there some way I can tell the TreeView not to scale the images, and display ...more >>

Is there any way to connect to SQL Server with Visual C Sharp Professional ?? I can successfully test a connection to SQL but cannot create a connection & message says you cannot do this with this version of VStudio....more >>

Folks, I need to try and make sure that a given string is a valid numerical value (not just int, or int32 - it could be float, decimal, what have you). VB.NET has a neat "IsNumeric" function - too bad C# doesn't have anything similar. Or does it?? I was thinking about trying to convert the...more >>

I want to print a C# form by pressing button on the form. It will print the contents of the form as well with the form layout. Any suggestions Thanks, Ruchi *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it!...more >>

I have something like this: if (strVariable.BeginsWith("SOMETHING") //whatever if (strVariable.BeginsWith("ELSE") //whatever if (strVariable.BeginsWith("SomethingEvenLonger") //whatever Is there any way to put that in a case statement? The key to my trouble is that the val...more >>

Hi! Is there a simple way to check if a string entered in a text box is a valid integer? Thanks in advance! /Henke ...more >>

Lets pretend you have a string array and each element is a sentence. Two of those elements read as follows: 1. The fox escaped from the hound. 2. The fox almost escaped. Now lets say you loop the string array and inside that loop you use a Regex class to determine if the current element...more >>

Our application makes extensive use of C#'s event handling mechanism to communicate between classes. A problem has cropped in that it becomes difficult to know for sure that all observers of an object's events have been deregistered when it's time to delete said object. If some other object is...more >>

I'm trying to create a data layer and having problems returning a DataSet from my code that's in a class module. Please forgive me. I'm new to C# (VB'er). I decided to create my data layer in small steps. Right now, I'm just trying to attach a ComboBox to a dataset that's in my class module. I...more >>

Why do we have the IComparable and IComparer interfaces don't they do the same thing (dispite having function which take in eitehr one and two parameters respectivly). an you give an exaple of where I would use one and not the other. Thanks Nick...more >>

Hello, Can someone point me to the site where the source code exists for where I can launch my application to use the SERVER GC in Framework 1.0 and Framework 1.1. Thanks...more >>

is it possible to turn off the multiselect in a Datagrid? if yes, how? Erald Kulk...more >>

hello Can I make swf(flash file) file using C#? what I need to make this ? Do you know any URL to reference this ? plz, I'll waiting your reply ... ...more >>

Hi, I have docked a tree view to the left on a form. When I start to populate this tree view with nodes, a horizontal scroll box appears in the bottom of the tree view even though thee tree view is big largely big enough to fit the nodes and text. If I widen the tree view the scroll bar...more >>

I would like to create a project from C#. Any body got some good references? I have been looking at what is at MSDN. Could not find anything that was very helpful. Thanks ...more >>