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A DLL is not an EXE - you cannot launch it like an application. If you've ever written a managed application that actually compiles and runs, then you're only loading DLLs. All those types you use from the .NET Base Class Library - they're all defined in other DLLs (known as assemblies in the .NET world) and you load and use the types defined in them. So, if your DLL is managed just add a reference to it for your project (and I know I've been through that with you already) and use one of its types. Make sure the DLL and the EXE are in the same directory or the DLL is resolvable in other ways.
Read How the Runtime Locates Assemblies[^] in the .NET Framework SDK.
And mav.northwind is right - you really should read about the basics of computer software. Since you're in the .NET world, start by reading the Assemblies Overview[^].
This posting is provided "AS IS" with no warranties, and confers no rights.
Software Design Engineer
Developer Division Sustained Engineering
Microsoft
[My Articles] [My Blog]
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Hi guys im currently in the process of struggling with my first web application using C# and ASP.NET and im having a little trouble removing a collection(of around 20) of tickets from my database table it keeps crashing and givin me the following error message
[CODE]Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
I have included the problem code and I would really appreciate it if you would take a few mins to look at it thanks in advance
Tadhg88
[CODE]sqlDataAdapter3.Fill(concertDataSet1);
// declare a new DataTable called tickets and fill it with the data in the Ticket table
DataTable tickets = concertDataSet1.Tables["Ticket"];
//***work throught the list of tickets and find the selected one
foreach(DataRow myRow2 in tickets.Rows)
{
//*** check if the selected concert name matches
if(ConcertsListBox.SelectedItem.ToString() == myRow2[0].ToString())
{
//*** check if the selected performance name matches
if(PerformancesListBox.SelectedItem.ToString() == myRow2[1].ToString())
{
//*** delete the selected row
myRow2.Delete();
//*** break out of the foreach loop
//break;
}
}
}[/CODE]
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Does anybody know if it is possible to write software that works across multiple monitors? and if so, is it possible to program one so it is private to the user / administrator and the other public. i.e they both show different things. Or even better- the private one shows both screens and the public one shows just what is meant to be seen.
If anybody could point me in the right direction of where to find out this info I would be very grateful 
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I think (and I'm not positive on this) that it is indeed very possible.
Just trying to recollect how to go about this (because i did read something about it at one point) I think your going to be dealing a lot with the adapters to the screens.
When you have a video card that supports multiple monitors, it refers to each device seperately *I think*. When you want to talk about one screen then you would ouptut to that screen, and vice versa. That data would not appear on the other screen. So, if you have one screen that you want to be private you just have to output all your graphics to that adapter.
Would this be a business app or something like a full screen app? When I talk about this stuff this was coming from a DirectX background, but I imagine its all very similar now.
I hope my convolution has helped at least a bit!
Jim
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Thanks for your response, I had thought about DirectX after reading something similar. Do you recommend any articles about beginning using DirectX? It is a business application I am writing - a kind of waiting notification like the one Argos have.
Thanks for your help
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I'm not 100% sure if I understand what you want, but there's explicit support in the framework for multiple monitors/screens.
Take a look at the Screen class. You can query the number of displays, for example, or retrieve the available desktop space.
How many displays are reported here should depend on the graphic drivers. They can tell Windows that there are two separate screens or that there's only one screen with twice the resolution.
mav
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Hello,
I have a data grid, and l want to added some records some text boxes into the grid. I have 3 text boxes and the user might want to add the contents 1, 2, 3, or 4 times.
Example:
Enter data in the text boxes, and enter the number of rows you want added. So if the user enters 3 and then click a button, than the data in the text boxes will be entered on 3 different rows. The data will be repeated on 3 rows.
Is there a way to do this using the datagrid?
Many thanks in advance,
Steve
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Don't try to manipulate the grid itself, instead, add the rows to your bound dataset.
- DougW48
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Hi!
I need a good method to remove multiple blanks from a string and replace them with a single blank. For example: "This is a string" -> "This is a string". The method I am using now works fine but is a bit resource demanding (about 80% of the thread). 
public static string RemoveMb (string strIn) // Remove multiple blanks
{
string search = @"\s+";
string replace = @" ";
strIn = Regex.Replace(strIn, search, replace);
return strIn;
}
Anyone know of a better method? ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
Best regards,
Daniel
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public string st(string st)
{
for(string st1="";st!=st1;st1=st,st=st1.Replace(" "," "));
return st;
}
Sorry ...
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Hmm, I took a quick look at and even tested that code. Does it do anything good at all? 
Doesn't it just replace all blanks (even the multiple ones) with a "new" blank?
Best regards,
Daniel
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Come on, take a look at the proposal and use your brain.
It's not so hard to find out that the first string in Replace has to consist of two blanks and that they're rendered as one blank because lainoo didn't quote his code in <pre>.
mav
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Well, I guess it wasn't that hard to find out so I'll accept the heat for that one. 
But it still doesn't work since the "multiple blanks" in my strings can consist of more than just two blanks.
Best regards,
Daniel
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Did you try the code after correcting it?
It's supposed to replace double spaces with single spaces until the string doesn't change anymore.
Each run should halve the double spaces in your input string until there are only single spaces.
mav
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Ahh! Tested it again now more thoroughly. My deepest apologies to both lainoo and You mav, the code works it just don't apply to tabs (\t) which the regexp "\s" seem to do. I got confused when I saw the big gaps in my string but when looked at closely they are mixed blanks and tabs. The method works way faster than the regular expression I used, now I need to find a way to include tabs.
I guess I'll have to go with a double run to first remove all tabs?
Thanks a lot!
Best regards,
Daniel
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Nice to see you were persistent enough to actually try
I think a simple call to
st = st.Replace("\t"," ");before the loop does the trick.
You don't have to care about double (or more) tabs, since the resulting double (or more) blanks are taken care of in the loop anyway.
mav
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String[] parts = strIn.split(' ');
StringBuilder newString = new StringBuilder();
for(int n=0; n<parts.Length; n++){
if(parts[n].Length > 0){
newString.Append(parts[n]);
newString.Append(" ");
}
}
newString.Remove(newString.Length-1, 1);
return newString.ToString();
_________________________________
Vote '1' if you're too lazy for a discussion
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Can't get that to work since it seems to split directly after the first blank found and leaving the remaining blanks in the string-array items 
Best regards,
Daniel
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Hi,
How can I directlly connect to mySQL server from C# without an ODBC drive? connecting through ODBC means I have to include mySQL Connecter/ODBC in my distribution media.. I want to only distibute my application..
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hello,
i have been told to develop an application that has a country map displayed along with all its states. now whenever i move my mouse over a state, the stae gets highlighted and when i click on a particular state an event gets trigerred and some data is displayed on the map. what tool should i do to accomplish this.
see this example
http://www.lq.com/lq/map/index.jsp[^]
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Well the link that you gave as an example used Macromedia Flash to do the animation and the mouseover type of information. You could use an html map function to create a map on an image,it might allow you to put a mouseover type of event in, but it has been a while since I have done that. You could make evach state into an image in the application and then just use the custom drawing routines on CP to draw them for each state.
Is this a web app or a Windows App?
Steve Maier, MCSD MCAD
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