Is it possible to use C# 2.0's (VS2005's) PropertyBinding properties to automatically load an ApplicationSetting (presumably of type System.Collections.Specialized.StringCollection) so that it auto populates the drop down list on program startup? Also, what is the easiest way to save a new ite...more >>

The SqlCommand.Parameters.Add(..) function takes an paramter for SqlDBType. Is there a generic way in .NET framework to convert .net types to SqlDBTypes? Or I have to mapping manually with a big switch statement? ...more >>

Hi, I have three classes: Animal, Dog and Cat. Dog inherits from Animal and Cat inherits from Dog. My question is: is Cat now also a Animal even though it didn't inherit directly from Animal? ...more >>

Hi, i've wrote a windows service that handle incoming tcp connections. Now i need to let him communicate with a windows form.. but without remoting. My service fires events too that i subscribe in my win form... is it possible? regards....more >>

Hello, currently we encounter several huge memoryproblems running .NET C# Applications under Windows Terminal Servers/Citrix. Sometimes the program claims 100 MB which is not very much at a single PC but a pain in the ass at a Terminalserver when 20-25 Users start the program (25*100 = 2500...more >>

When a user starts up my application, I want to check for some prerequisite conditions, and if not met, the exit the application. Example: public Form1() { InitializeComponent(); if ( MandatoryConditionsNotPresent() ) { MessageBox.Show ("So Sorry! Unable to run."); ...more >>

Hi All, I am trying to load 23 MB PNG file using the Bitmap Class, but I am getting an out of memory exception. My computer has 1 GB RAM and 1.5 GB Virtual Memory but still I am getting this error. The Image file is not corrupted and I am able to see the Image in the Windows Picture View...more >>

Often in dbs , tinyint is used instead of int (because tinyint cols may be indexed , whereas int cols may not). What is the best way to convert integers to booleans ? The following fails: bool myBool; tinyint myTinyInt = 1; myBool = (bool) myTinyInt; If you have restricted your i...more >>

Hi All, I just have a simple Windows Application with one Windows Form and one button. In the Button Click event I have the following code. Bitmap TheImage = new Bitmap(@"C:\GV7TestService\SIDSpot\mrsiddecode_win\TestImage.png") ; bool ImageLoaded = true ; TheImage.Dispose() ; When ...more >>

Hello: Anyone have an opinion on the best way to formulate a dynamic HTML email? Thus far I have figured out that the only way to "build" the HTML prior to the email (I'm using System.Net.Mail) is to manually build the HTML string in code or "screen scrape" a stream from a WebRequest. I'v...more >>

Hey folks, I have a toppic I would like to discuss: Many authors write that business objects should have the CRUD behavior implemented (create, read, update, delete). Which means that a class Customer has a method Load() etc... In my opinion this is not the right way, because this means...more >>

I want to data bind a user control and a business object, using a BindingSource control. The control has a 'Priority' property that takes a 'Priority' enum (High, Normal, Low). The business object has a property with the same name, which takes an identical enum. Data binding isn't working, ...more >>

Hi I have a function in a c++ dll that I need to use, but I do not know how to pass the arguments. This is the function in c++: extern "C" __declspec(dllexport) void __stdcall Info(char *Label, const int &ID, char *Message, int &StatusCode, int &ErrorIndex, char *ErrorString) Can anyone ...more >>

I need some help regarding the mechanism to put in place to be able to dynamically update a remote object when the assembly where it is defined is modified, and this whitout having service interruption. Basically what I'm missing is how do we re-expose a remote object when assembly has cha...more >>

Hey guys, I have a DataGrid and DataTable field in my class : private ImageDataGrid dataGrid1; //ImageDataGrid extends dataGrid and just overides OnMouseDown private DataTable dt = new DataTable("MyTable"); In the classes constructor, after InitializeComponent() I call the following ...more >>

Can anyone give me any hints on how to do this. I already have a console app that I have to start manually but I want to configure it to run as a windows service. ...more >>

I'm trying to finalize a windows service design any would appreciate any comments - I'm new to windows services. Essentially my UI app relies on a service to schedule IO tasks. The service does nothing but keep track of elapsed time. The reason I need a service is because the IO tasks are...more >>

I have the infamous GoF Design Patterns boo - it's been sittin gon my shelf for years. I have a huge reading list and find this book a rather dry read and am always putting it off. I have recommendation for "Head First Design Patterns" book, but it's aimed aimed at Java developers. I'd rath...more >>

Hello, I have the following code below that does not work for me because the directory has millions of files. foreach (string ofile in System.IO.Directory.GetFiles(strMyDir)) { System.IO.FileInfo oFI = new System.IO.FileInfo(ofile); oFI.Delete(); } How can I get the first file...more >>

I am about to deploy a C# application which requires a third party database to be installed and ready at the client machine. The third party database has its own .msi file, complete with expected user interaction etc. My question is, is posible to create an installation package that does th...more >>

Hi, I have a situation in where i have two instances of SQL server, the first is our Production Environment, the second is our Development environment. Both servers contain the same databases but I need to write a utility that can transfer a row of data from the Production to the Developme...more >>

We have a number of COBOL programs, and some were currently developing, that simply read TEXT based reports and scrap the reports for various information. I'm curious to know if anyone has attempted to do this sort of thing using C#? I would love to get rid of my COBOL programmer and esp...more >>

I have a ListView on a dialog with Detail view. (1) How do I select the whole line instead of the 1st column? (2) How do I hide a column so that user would not be able to see it? (3) How do I programmatically adjust the column width to show all the text in each column?...more >>

my understanding is that the max value of a byte is 255. Therefore, why does the following code get a compile error? byte val1 = 10; byte val2 = 23; byte ttl; ttl = val1 + val2; //this line wont compile compile error: Cannot implicitly convert type 'int' to 'byte'. val1 + val2 = 33 w...more >>

I have a C# project with tab control with eight tab pages. I would like to allow the text or the text color to change when an event occurs, then have the text or text color change back when the tab is clicked. However, I don't find a click event handler specifically for the individual tab pa...more >>

I am in the beginning stages of rewriting an application from Delphi to C#/VS2005. In the current application, we cache much of the static data on the local work station in memorydatasets. This works nicely because it reduces network traffic and the app is very responsive. There's an inita...more >>

I am trying to open an Unconnected/Disconnected ADORecordset. Using VB I would use the following function call rs.Open() However C# requires a Source and Connection. What do I pass in? I have tried null, the null string, zeros, empty objects but I keep getting a runtime error when I try...more >>

Today I discovered that a syntax that I thought was forbidden in C# but allowed in VB.NET (and I _don't like_ that it's allowed in VB.NET) is actually allowed in C#. Which confused me. The syntax in question is referring to static members of a class *from a subclass*. (Now, I know for sure the...more >>

Folks, I am working on a .Net web site that connects to SQL Server 2000 on another box. The DBA has given me a Domain user account with rights to the database and table. I have confirmed with Query Analyzer that the user ID and password are good and can access the correct tables. How...more >>

Currently I'm working on a Windows application (C#) where I'll need to create controls, like VU Meter, Sine Meter, switches, etc. What's the best technology to use to create those controls? Is GDI+ good for it? Also I'm looking into possibility of buying such controls. Can someone send me into t...more >>

Basically I'm creating a map application. When a user selects display all accomodation, the accomodation icon appears painted over the map(in picturebox). Is there anyway to display info eg name of hotel when user uses the stylus to mouseover the icon?? ...more >>

If the code to insert a new Student is: Profile.Teachers[tId].Classes[cId].Students.Add(new TCS.Student(id,teacher, class, name)); what is the code to Remove a student? I tried the code below, but I don't understand the syntax: Profile.Teachers[tId].Classes[cId].Students.Remove(new TCS.Stu...more >>

I want use a different signature for a base class event and also override the On... protected method. It's not working. What am I doing wrong? Here's the code. public partial class UCBase : UserControl { public event EventHandler IWasClicked; public UCBase() ...more >>

When looking through the object browser, I see comments that are shown for each property, method, etc. What is mechanism for doing this? Thanks, -- Warm Regards, Lee "Upon further investigation it appears that your software is missing just one thing. It definitely needs more cow ...more >>

I'm new to programatic manipulation of XML, and I'm sure I'm not doing everything in the best way. In specific, I have a number of pieces of code that look like this: string foo=""; foreach (XmlNode xnii in xni.ChildNodes) { switch (xnii.Name) { case "foo": foo = xnii.InnerText; ...more >>

I have an automated application that opens and manipulates Office documents. Every time a document triggers a dialog to pop up, the process waits for the dialog before it continues. After a little research, it seems like I will need to use hooks and messages in the Win32 API. Does anyone know...more >>

Is there any way of modifying the ProductName in my setup project dialogs that doesn't involve me having to rename my setup project? I have an application named 'Foo', and the main project within the soloution is 'Foo'. I'm trying to make my setup project use the name 'Foo' for product name, b...more >>

I am pulling an integer value of the amount of seconds since 12:00 am from a SQL Server DB. I want to convert this integer into a formated string or datetime to display a legible time of day. Are there any built in methods in the .NET framework that will accomplish this. If not, any other s...more >>

Hi, I have a datagrid and based on a condition I like to display either a asp:textbox or asp:label. How would I do that? I have the following <asp:TemplateColumn HeaderText="Qty"> <ItemTemplate> <% if (DataBinder.Eval(Container.DataItem, "DynamicAttribute") = "No") {%> <asp:textbox ...more >>

hello all, i have a question about system analysis and design, i tried to solve it but i could not .. choose a relaively small organization that is just beginning to use information systems. what types of systems are being used? for what purposes? to what extent are these systems integrated...more >>

Avoid running several simultaneous instances of the same application on a single machine. ( Checking if application is already running) (Book Excerpt Practical C#2) Thanks to the static methods named GetCurrentProcess() (which returns the current process) and GetProcesses() (which returns a...more >>

Hi All, I'm stuck whit an issue I can't seem to resolve in C#: I have an arry of bytes which I would like to "recast" to an array of structs with an Explicit layout. I tried the Buffer.BlockCopy method, but that one complains my struct is not a primitive type. Any Suggestions ? In de...more >>

I have an XSD which I have generated a class from using the xsd.exe tool. My XSD contains complex types within it, so that the generated class has member variables which are of types that are also defined in the XSD. I deserialize XML data into instances of that class, and serialize back to ...more >>

After a I read Walkthrough: Connecting to Data in Objects (http://msdn2.microsoft.com/en-us/library/ms171892.aspx#Mtps_DropDownFilterText). I still have project on that. My School project provided me an array of objects - News, but VS 2005 seams only accept Collections like IList<News> for Dat...more >>

I'm learning c# and see a code example where a value of null is assigned to a variable: int? a = null; I could not find this in the docs. can someone please explain exactly what the '?' is? and where-all it can be used? Thanks. -- moondaddy@nospam.nospam ...more >>

Can anyone tell me what the rational is for not supporting optional arguments. It is obviously a trivial thing to implement and, since C++ has them, I would not expect them to be omitted without a good reason. ...more >>

VS2005 not integraged with Visual Source Safe 2005 ? ...more >>

Hello, I want to auto generate the data acces classes from my database(sql server 2005/2000) . I use visual studio 2005 and c#. Can someone tell me where i can find relevant documentation on this matter? Many thanks in advance JJ ...more >>

Where can I find the suggested Design Pattern ? ...more >>

I am using remoting to talk between separate apps *on the same machine*; currently my server startup code is as below, but it throws the XP firewall warning dialog. Since I only need to connect locally, is there any way of preventing this - i.e. can I tell it that I only want to accept local ...more >>

Hiiiiiii I'm working on a client server application which work like messnger.. I was able to capture the camera with no problem but now i want my my program to listen to incoming connection and start sending.. I'm using UPDClient (I think TCP is not the right protocol to send video stream)...more >>

Hi, Is there a way to get minimize and maximize buttons on a sizable tool window? Or maybe just a minimize button? :-) Thanks everyone! Julie ...more >>

Am I correct in assuming that grid.Controls.Count is 1 less than the count of the number of rows ? Is there some other property which gives the actual count ?...more >>