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I tried it. I don't get any extra message box.
---
single minded; short sighted; long gone;
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Hmm, i just moved the code from a button click (the button in the groupbox) to the forms OnLoad event, i no longer get the message. Must just be one of those wierd things.
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It was from the click of the button in the group box that I ran the code also, so that is not the cause of the extra message box.
Move the code back and see if the extra message box comes back or not. I still think that there is something in my original theory...
---
single minded; short sighted; long gone;
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Hmm, it doesn't do it now. I am confused.
And i never checked how many controls where in the groupbox in the first place. Infact, i've never used Controls.Count ever.
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I have written a service that will be run on mutiple computers connected to the same network. However if the service is already running on one computer I don't want it to run on the other computers.
Does anybody know if this is possible?
-- modified at 18:34 Wednesday 7th March, 2007
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Most things are possible given enough time and resources.
The problem is that you will have independent processes running on independent machines that know nothing of each other. Somehow you have to get them to know about each others run status. The most common way of doing this is for them to connect to and query a server. This server can keep track of which computer is currently running the service.
Hopefully that helps.
Phil
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Thank you very much. Your post was most helpful.
I created a table in the database that has one column called Running which I set to N. When the service first starts up it queries this table. If N is returned the service sets it to Y and it can start. If Y i returned the service cannot start. When the service which is running stops, it sets the row back to N.
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Hi,
I'm using MSVS 2005 .N_ET 2.0
Seems that one should use datagridview instead of datagrid?
I have a MS Access database and in that db a table called Cancelled which
contains colums in order [Employee,Booker,Tele,CancelDate,Reason] and i have no problem
writing data to this db.
Here is what i want to do:
1. If i click some button, a window appear with a datagridview object in it containing
the whole database row by row.
2. What i have trouble doing is reading the database so all information is displayed in the
datagridview object.
Since i use OleDbConnection to my db i looked into the OleDbAdapter.fill method that reads into a dataset. I've also tried to drop from the toolbox a dgv object onto the window and tried to bind datasource and all that came with it like connectionstring(that went totally wrong), but i didn't think i knew what i was doing 
I think my problem is very easy to solve ? I think i can build the dgv object's structure and simply read all records from the database and then insert records one by one in some manor..
But since i'm new to this i would like some starting point if someone can help me?
Thanks from Daniel, Sweden
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Hiii
My question as it appears from the subject is : what is the best way to access function in a (MFC) VC++6 DLL from a C# program?
Thanks.
MiNa
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See this[^] link, esp. Taylor Michael L's reply.
/ravi
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how can i create a variable that can be accessed by any Forms in the same project
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Hi,
you can create "global" variables by putting public static variables in some class,
as in:
class MyGlobals {
public static int recordCount;
public static bool modified;
public static bool exitRequested;
}
and then access them as in: MyGlobals.modified=true;
But then this is considered bad practice, since it does not follow OO guide lines;
one should give explicit access, by passing objects to interested parties, not by
publishing them to the entire process.
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thanks allot
i will try it using OO
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I was using Petzold's book to learn Forms in C#. I noticed the nice MenuStrip replacement for Menu and decided to try it out. When using the Menu, the client area does not include Menu but the MenuStrip is placed in the client area. What is the best way to make the client area start below the MenuStrip like it does for Menu?
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After reading further in Petzold's book, MenuStrip is just like StatusBar and ToolBar, they are controls. The client area needs to modified and Petzold recommends using a Panel.
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My code:
//declares the string array
public string[] msg;
...
function one(string name, string message)
{
msg[name] = message;
}
^^^^^^^^
that's what i essentially want to do, but of course it throws an error about not being able to explicitly convert to int. Now if i use:
msg[Convert.ToInt32(name)] = message;
It converts it to '0', and it does that for any value of "channel"
In languages like php you're able to use a string as the identifier in the array, is this at all possible with c#?
Thanks in advance
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Use the generic Dictionary type. It allows you to specify the key and value types:
protected Dictionary<string, string> messages = new Dictionary<string, string>();
protected void function one(string name, string message)
{
messages.add(name, message);
}
Ian
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Well thanks, that works to add and retrieve, but if i try to add data by retrieving the old data and adding text to it and readding it, it crashes.
i.e. (assuming all variables and members are declared )
messages.Add(name,"message 1");
messages.TryGetValue(name,out value);
value = value + "\nMessage 2";
messages.Add(name,value);
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Nevermind, found out during debug mode that i couldn't add it because it's already there
messages.Add(name,"message 1");
messages.TryGetValue(name,out value);
value = value + "\nMessage 2";
messages.Remove(name);
messages.Add(name,value);
^^ that code works great  thanks for your help!
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If you know the item you are looking up will always be there, you can simply access the item with the overloaded '[]' accessor:
value = messages[name];
If, however, you suspect the item may not exist in the list, you can use TryGetValue (like you do in your example). This returns false if the item was not found. So you should only use this method if you intend to check the return value:
if(messages.TryGetValue(name, out value) == true)
{
value = value + "\nMessage 2";
messages.Remove(name);
messages.Add(name,value);
}
else
{
// The expected item was not found. What do we do?
}
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You can't add an item to a Dictionary<> with a key that is already in use. Try:
messages.Add(name,"message 1");
if(messages.ContainsKey(name) == true)
{
messages[key] += "\nMessage2";
}
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Good Morning,
i have a problem!
i have a form with a DataGrid.
the form have a KeyPreview properties and i placed it to true.
the form events "KeyPress" i placed the following code:
if (e.KeyChar == (char)13)
SendKeys.Send("{TAB}")
so when i click on enter and the focus is on datagrid on the first row, so the focus goes to third row and not on second.
what's the problem??
Thanks a lot!
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I think you don't need to capture Enter key in DataGridView. Because normally pressing Enter causes to focus goes to next line. For activating movement by "Enter" instead of "Tab" use below code :
<br />
Form_KeyDown()<br />
{<br />
this.SelectNextControl();<br />
}<br />
Don't forget to set all controls TabIndex property.
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Thanks dude!
i didn't know that DataGridView has this movement by "Enter" instead of "Tab", without need to use code.
it was a good tip.
Thank you a lot.
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Hi, I'm looking for a ListView exactly like the Properties panel in VS.NET. Where can I get one?
Thanks!
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