I need help understanding why the following code causes an InvalidCastException? //I created an Interface public interface IFoo { string a {get;} } //Then a class that implements the interface public class Foo: IFoo { string a {get "something";} } //Then a special class that de...more >>

I know how to ban an IP from the firewall. Is there some slick way to code a trap on my website to check IP and redirect them to a 'banned' page? That way they have the option to contact me if they are legitimate (via contact information on that page). I know that I could, at the top of eve...more >>

I have a C# Web Application, and we are getting banged repeatedly by a web crawler at a specific IP address. I did an internet lookup on the IP address (http://www.ip2location.com), and it just says it is owned by Cox Communications. I don't know if it belongs to a specific customer of Cox, ...more >>

Hi, I have this issue where a form that contain a System.windows.forms.mainmenu has its height increased by the height of the mainmenu at object creation level. Here's the idea: //form creation frmMyForm myForm = new frmMyForm(); //frmMyForm constructor public frmMyForm() : base() ...more >>

Hi, When creating a form, how can we set its property .left and .top to be handled when the form is showed. Because, if I first assign values to ..left and .top, and secondly I call .show(), then the form does not display at the correct screen location. ex: System.windows.forms.form my...more >>

Hi All, I have seen many examples of deleting folders with subfolders and files. (system.io.directory/info etc delete method) However, I cannot find a decent code example which will work where some folders/files maybe read only or hidden. I know, basically have to change the file attributes ...more >>

Hi I have the following code to open a form modally. It works great only the second time I have to close it twice, the third time 4 times. I am using Dispose(), why is it coming back so much? Tim MM.Forms.frmPriceCalc fCalc = new MM.Forms.frmPriceCalc(); fCalc.RegPriceCalc = true; //r...more >>

Hi, I'm new to C sharp and currently writing a small program that uses an Access 2003 database. I am currently having a problem when updating a row that includes numeric data. When updating just the text fields in the row everything works fine with the following command: dbComman...more >>

I am currently working on an app the will be a shell replacement. Part of the goal is to list the current network status; basically I need to know if the network card is plugged in. I am currently using WMI to query all adapters to see if they have a connected status. The status is updated eve...more >>

This is for a Win form. Before I made changes to my text boxes this code worked. I don't think I touch any code relating to my datagrid. Code should populate my datagrid with blank data, this use to work but now I get a "System.OutofMemoryException", on the DataRow dr = dt.NewRow(); ...more >>

This is for a Win form. After creating my new Textbox Class, all my instances of my new Textbox Class are transparent. My textbox class inherits System.Windows.Forms.TextBox, why would my text boxes be transparent? How do I fix this? ...more >>

Hi, I have a ASP.NET aspx file that needs to pass large images from a network storage to client browser. The requirement is that users cannot have access to the network share. The aspx file must be the only method that users receive image files. Essentially, the aspx file is an i...more >>

Is it possible to view the contents of a CHM file within IE? I've attempted to do this by right-clicking on a CHM file then selecting "Open With..." and finally selecting "IE", but nothing happens. What I'm attempting to do is allow the user to open an MDI child within their .NET app and v...more >>

Is there an upper limit to how many Session variables you can transfer? I'm working on a utility application that passes info from a web form into a pdf. There's no database access, so I'm using Session variables, but it's going to end up being a lot of data. Is this the best way to do it, or...more >>

Hi- I'm developing a asp.net web application and everything has proven fine on the dev and acceptance environment. We've moved the code up to our windows server 2003 prod environment and get the following intermittent error when browsing the web page through a client browser (the action causing...more >>

Hi, I am trying to pass a SQL Command, complete with parameters and their values from one form to a modal form. The modal form has; public void GridDataPreload(System.Data.SqlClient.SqlCommand cmdPreload) { } the calling form has; fSaleItems.GridDataPreload(this.cmmSQLUpdateSaleReview...more >>

Does somebody know where I can find the P# compiler? Thank you ...more >>

Is it possible to Reflect a variable inside a method? I can Reflect a class field using GetField, but can I reflect a variable/field from inside member? For example, I want to Reflect samp inside of the method: public int myMethod() { string samp = "five"; // Get type infor...more >>

Hello, I'm doing a kind of Windows TaskBar application and I've found a problem. When I want to show open application's buttons I need to search in each Process running at PC and system becomes too slow. I thinked to modificate the process by using a global hook to intercept Window Opening,...more >>

I'm loving VS 2005. These are my questions and comments so far: BUG: Autoformatting ================ I've turned off virtually all autoformatting, but there is still one place where it rears it's head even after it's been turned off. Reproduce the problem as follows: 1) Turn off all auto...more >>

Hi, I'm writing a C# win application program, and i need to transfer my hebrew letters from unicode to ascii, now if i use the ascii encoding it writes me ??? instead of the hebrew letter i've entered. I know what the Ascii value of each letter, so i understood that i can transfer my string...more >>

Hi, I have the following code at the heavily demanded server side service: strResult=str1+"\\"+str2+"\\"+str3+"\\"; Would it be better (performance wise) that we change it to this: strResult = string.Format(@"{0}\{1}\{2}\",str1,str2,str3); Which one is faster? Thank you, Alan ...more >>

I have a WinForms app in which I have several data object libraries. One of them is called "DataObjects" (excuse the unoriginality of my naming!). Anyhow, I keep on getting messages like this when I compile my main app: Warning: The dependency 'DataObjects, Version=1.0.2127.16824, Culture...more >>

I am streaming an audio presentation with which i will also have some text. I would like to remember the text that was displayed with the audio. I want this to be replayable later thus requires that text be displayed at the appropriate time as the original presentation. (make sense?) what ...more >>

Hi, for some of the classes in my project, IntelliSense does not seem to be available, whereas for others everything works fine. I believe that for all the classes I have added after a certain date this information lacks somehow. I tried to rebuild IntelliSense information by deleting the o...more >>

Greetings, Looks like we can download VS.NET Professional from MSDN subscriber downloads, along with Visual SourceSafe 2005, Visio for EA 2005, and SQL 2k5 Developer. My DSL only has 180kbps so do download the VS.NET ISO alone (3,7GB) would take about 48 hours. SQL 2k5 is 2.7GB, that wo...more >>

Hi, All: I'm populating database records into a panel controls and want to render that panel into a HtmlTextWriter which will creating a word document. Do you know how to insert a page break between each records? Thank you for the help. Below is my code: Response.AddHeader("Content-D...more >>

Is there a way to get the name of the class and method in code when not running in debugger. For example: class myclass { const string modulename = "myclass"; public void mymethod() { const string methodname = "mymethod"; string output = "You are in " + modulename + "." + me...more >>

Hi, I need to develop a program to control electronic instruments. We have so many different instruments but we can group them. Each group has some common functions. When user choose an instrument, the other instruments may not be needed at all. So I was thinking if I want to write one exec...more >>

First off, yes, I used the search as a first step. But I am a complete newbie when it comes to C# and a lot of the help I found was of no use to me because of my limited knowledge of the language and how it works. So please bear with me, haha. What I need: --A command line executable applic...more >>

Hi There Consider the following error that I receive when trying to instantiate the web browser control: An unhanded exception of type 'System.Threading.ThreadStateException' occurred in system.windows.forms.dll Additional information: Could not instantiate ActiveX control '8856f961-340a-11d0-...more >>

Hi, Seen on the VS.NET 2005 Launch page : >>All attendees will receive a full version of SQL Server 2005 Standard Edition and Visual Studio 2005 Standard Edition.<< Will this version be crippled (in time) or will this truly be the full (Standard) version? Cheers, Dan...more >>

How would I signal the main app when a thread has completed a task. The thread must remain actice. Every time it reads a given number of bytes it must let the main app know, then wait until more data shows up. The number of bytes it reads varies. Thanks, Bill ...more >>

hello there I was doing a project in VB.net and i used the following code to access the element of the parent form #################Code ##### DirectCast(Me.Owner, PhysicalInventoryfrm).drpInvName.DataSource = inventoryCombodataset.Tables(0) ######### where "PhysicalInventoryfr...more >>

Hello all, I have buildt a class library for my co workers to use, using C# and vs.net and for some reason, when they reference this class in their projects the Summary, params and returns are not being displayed in the intellisense. Is there something special that I need to do for this to s...more >>

How can I use WinPcap or PacketX.dll to catch any packets that flow on my machine network adapter? Is there any sample code on how to do this? I would like something like this... and without using any additional ..dlls: ----------------------------------------------- using System; using...more >>

In spite of the obvious advantage of not encountering a NullReferenceException unexpectedly in your running program is there an offset cost in performance for using String.IsNullOrEmpty() over != ""? If so, would it be of any great significance if a large number of strings were being tested ove...more >>

Hello, I am writing a class in C# that uses [DllImport("DllWin32Ndisuio.dll")]to call functions from a C/C++ dll. ------------------------------------- //Code in C# in Platform .NET [DllImport("DllWin32Ndisuio.dll", CharSet=3DCharSet.Auto)] public static extern bool ConectarNdisuio ( ) ; ...more >>

Hello all, Below I have a function that captures a packet and sends that packet to a Receive function (wether it is sent or received). I'm asking what functions should I use (what imports should I use and a sample of source code) in order to get a "byte[] buf" filled with a packet and using...more >>

Hi there does anyone have any idea on how to implement this function? How i wish that DataGridView had a GridVScrolled function like the old DataGrid but it doesn't so i'm wondering if there is another approach? thanks in advance Brian Keating...more >>

Hi I need to create a form that has a navigation panel similar to the outlook bar in MS Outlook. Do I need to purchase a 3rd party tool for this, or is this control available within C#. I am creating a windows application. TIA ...more >>

I want to remove check boxes for the child nodes but keep a check box for the parent node. Does anyone have any ideas? Thank you kindly. Warm Regards....more >>

Hi all, I have an MDI application, where the user can have more than one child windows. Im trying to have a cursor for each child window and the position of the cursor has to be synchronized with the cursor in the active mdi child. For this i have tried using a picture control with a arrow ...more >>

hi all im facing a problem in error handelling. what im doing is getting the images from the database to my csharp application form .. now here in some of the records contains images along with the data where as some as has null value .. who to trap this please help thanks f...more >>

I am getting a System.Data.SqlClient.SqlException with a message string of 'Unknown Error'. Happens occasionally when creating a "new SqlCommand(...)" while the same command works perfectly happily hundreds of other times. A side effect is that the connection closes. ..NET version is 1.1, sam...more >>

Say I have string foo = "Some text http://www.google.com more text fred.bloggs@somewhere.com more"; How could I parse it to find the links and store the results in a string array, i.e. to get string[] bar = ParseText(foo); // bar[0] = "Some text ", bar[1] = "http://www.google.com", bar[3...more >>

Hello, Does anyone know if there is a library or a sample project that can parse strings with mathematical expressions inside ? eg. string math = "(23 + 48) ^ 2 - (7.76 * 3.14)"; parser should calculate the result of this. Atm I have my own parser, but it can only handle very simple expr...more >>

Q1: The intellisense summary info for a class only seems to update after a change to that class's XML comments if I remove the reference to the project from the current project and add it back again. Why so, and how do I stop this? Q2: The <seealso> tag seems to be required (by Vis. Stu. 20...more >>

What is the best way to convert a bytearray into a string ? I thought I could do it using the code below, but is there anything faster/easier than this? Thanks! Chris int aLength = 100000; byte[] myByteArray = new byte[aLength ]; string myString = ""; for (int i=0; i<aLength ...more >>

Hi, i am learning c# at home in my spare time (what a life), and i am working through some examples. I run the following code and i get the following error when the if condition is not met. An unhandled exception of type System.FormatException' occurred in mscorlib.dll string charval=...more >>

Hi all, I am very much new to the world of Crystal Reports. On my server I have say..10 reports(.rpt's); which are modified once in a while. On my clients there are copies of these reports(.rpt's). What I'd like to do is that each day when the client fires up, it checks the version of ...more >>

Hi, Now that I've built up a DataSet and a CrystalReportViewer in Form1. Also the CrystalReportViewer is pointing to CrystalReport1. The Form1 can open the CrystalReport1. However, I don't know how to have the CrystalReport1 or CrystalReportViewer use the DataSet. How does a textbox in ...more >>

I am building a pocket pc application that requires a datagrid. I am inserting a new row this way: private void mInsert_Click(object sender, System.EventArgs e) { try { DataRow dr = this.ldb.DohvatiDataSet.Tables[tableName].NewRow(); dr.BeginEdit(); for(int i = 0; i <...more >>

hi all, I want to install a (FREE) log framework to my application. which logging package is easy to use? or which logging packaga is most popular? Please advise. Thanks. steambun ...more >>

Hi all, Iv got a slight problem with a datagrid and the ability to only display certain things in it. I have a Data grid which is connected to a data table. The data table is connected to a data set which in turn gets its info from an xml file and xml schema. I am able to view...more >>

Hi, This is regarding using Arrays of UDT's in COM. The following is a short description: - We basically need a structure, struct MAIN_STRUCT which must contain a dynamic array of another struct, struct SUB_STRUCT. We have a interface function that is callable by the client, which take...more >>

ok have u ever been on a website someone makes and they have these really cool cursors that have some glitter or bouncy balls followin them? well i need help to find out where to go and look for them... i really want to be able to download or make them for my site... can anyone plz help me? Tigg...more >>

Hi all, got a bit of a problem with a datagrid. I have a datagrid that gets it information from a data table which in turn is connected to a data set. The data set is linked to an xml file and an xml schema for the rules. The table that i have displayed in the datagrid has 2 columns ...more >>