Re: C# Theory question - C# Discussion Boards

.gonad5-Jul-03 2:37

5-Jul-03 2:37

I'm new to c# and programming altogether, so can you help me figure out the best way to do this?

i have a "Tools > Options" dialog box where a user can put in the db settings to connect to a database (IP, username, password, etc). once a user submits these settings, i want the whole application to reference these settings for the database connection.

i have about 5 forms on this small app that connect to a db, so i don't want to statically assign these settings per form.

can i (or should I) use a struct and define the users settings as constants? if so, how can i call the struct from each form?

Thanks for your help.

Re: C# Theory question

leppie5-Jul-03 2:46

leppie

5-Jul-03 2:46

.gonad wrote:
i have a "Tools > Options" dialog box

You have or want?

.gonad wrote:
i want the whole application to reference these settings for the database connection.

Add a name/value to your config file. Then you can just get the value via dynamic properties.

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Re: C# Theory question

.gonad5-Jul-03 3:11

.gonad

5-Jul-03 3:11

Hi.

actually, I already have a dialog box where the user will have to enter the db connection properties. basically, i wrote this because i use this app at home AND at the office, but my network settings are different, so this "tools > options" dialog box will be helpful for me to make the these changes easily.

I just don't know how to make those changes permanent throughout the execution of the app and how to call those settings from each of the forms.

Thanks for you help. Smile | :)

Re: C# Theory question

Nathan Blomquist5-Jul-03 4:08

Nathan Blomquist

5-Jul-03 4:08

The best way to make the settings global to your application is by having a class that is visible to the whole app. Something like:

<br />
public class MySettings<br />
{<br />
  public static string MyDbConnectionString;<br />
  public static string SomeOtherSettings;<br />
}<br />

Notice the keyword static infront. This means that you do not need an instance of the class to reference those members. You would access them like:

MySettings.MyDbConnectionString = ...

So you just load your settings from a file at the start of your app, and then just set them again from the options dialog.

Hope this helps and gives you a start,
Nathan

---------------------------
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Re: C# Theory question

.gonad5-Jul-03 6:40

.gonad

5-Jul-03 6:40

Thank you for your help. that's exactly what i needed to know, and it works like i expected.

Blush | :O

Re: C# Theory question

Nathan Blomquist6-Jul-03 7:52

Nathan Blomquist

6-Jul-03 7:52

Glad that I could be of help Smile | :)

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Re: C# Theory question

leppie5-Jul-03 10:12

leppie

5-Jul-03 10:12

Its generally better to place things like your own SQL/Access connectiong string in the machine.config file. That data will be available to all the applications running on the machine via Dynamic properties.

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Re: C# Theory question

James T. Johnson6-Jul-03 4:04

James T. Johnson

6-Jul-03 4:04

leppie wrote:
Its generally better to place things like your own SQL/Access connectiong string in the machine.config file.

I would advise against this for a couple reasons:

Your app will break if you move to a new version of the framework, but forget to update the machine.config for that version of the framework. Or worse, another application does the same thing, but storing a different connection string.
You are taking something that should be local, and making it global. You wouldn't want your connection strings entered into another application so you should keep them local to the apps that need it.

Instead you should store the read-only setting in the app.config file. If you expect to make more applications using the same connection string then you would be better off creating your own settings class and storing that in the user's application directory, or the common application directory if the settings should apply to everyone.

James

"I despise the city and much prefer being where a traffic jam means a line-up at McDonald's"
Me when telling a friend why I wouldn't want to live with him

Re: C# Theory question

leppie6-Jul-03 8:26

leppie

6-Jul-03 8:26

James T. Johnson wrote:
You are taking something that should be local, and making it global. You wouldn't want your connection strings entered into another application so you should keep them local to the apps that need it.

I realise that! I was thinking more in a development enviroment, rather than production. Obviously on deployment, an app.config file is created to carry the setting. That makes sense doesnt it?

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Displaced text

Zibar5-Jul-03 1:07

Zibar

5-Jul-03 1:07

You have probably noticed that if the text attributes are set to bold, larger size etc. on most of the controls the text itself is displaced to the left (usually). I'm talking here about the standard .NET controls (button, etc)

Can something be done? Are custom controls the only solution to this problem?

Also buttons with an image and text do not look very good.

Re: Displaced text

leppie5-Jul-03 2:43

leppie

5-Jul-03 2:43

Zibar wrote:
Also buttons with an image and text do not look very good.

Try turning on ClearTpye sfont smoothing if you have XP, and see how screwy everything goes.

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Game development

Xedecimal4-Jul-03 21:11

Xedecimal

4-Jul-03 21:11

Looking for C# game developers, I've already got the engine started, I just want more people to work on this with, it's coming pretty far and I want to collaberate with others that have some experience with these matters, anyways, all the information is at http://xed.kicks-ass.net/ypconquest[^]. Thanks

Running another application in C#

pdunn4-Jul-03 21:00

pdunn

4-Jul-03 21:00

I am writing a method in C# and I need to execute applications from it. I have used ShellExecute in C++ before. So I thought that I would be able to make a managed extension. For the method, it was suppose to take in a string, the name of the application to execute. I got an error message when I used String, string, CString. I don't know what to use as the type. So I tried something different in C#, I used

Process myProcess = new Process();
myProcess.StartInfo.FileName = "Notepad";
myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Maximized;
myProcess.Start();

but that did not show the notepad application (I didn't try any other application program yet). The process is running in the background, I check with task manager. The problem is that I don't know how to write managed code and I don't know how to use C#. I am new to both.

Thanks for any help

Re: Running another application in C#

J. Dunlap4-Jul-03 21:35

J. Dunlap

4-Jul-03 21:35

I used the exact same code that you did (I copied and pasted just to be sure), and it worked. Confused | :confused:

"Blessed are the peacemakers, for they shall be called sons of God." - Jesus

"You must be the change you wish to see in the world." - Mahatma Gandhi

Re: Running another application in C#

MrEyes7-Jul-03 6:43

MrEyes

7-Jul-03 6:43

This is how I have done it in the past :

<br />
FileInfo launchfi = new FileInfo("myprogram.exe");<br />
if (launchfi.Exists)<br />
{<br />
  Process mainapplication = new Process();<br />
  mainapplication.StartInfo.FileName = launchfi.FullName;<br />
  mainapplication.StartInfo.WorkingDirectory = launchfi.Directory.FullName;<br />
  mainapplication.StartInfo.UseShellExecute = false;<br />
<br />
  try<br />
  {<br />
    mainapplication.Start();<br />
  }<br />
  catch<br />
  {<br />
    MessageBox.Show("Unable to start application.");<br />
  }<br />
}<br />

drag-drop dash line ??

azusakt4-Jul-03 15:27

azusakt

4-Jul-03 15:27

hi,
I'm a beginner of C#,
recently, I have to handle a project which need a dash line object.
I know I need to make my own control, however, I can't find any solution and idea at all.

actually, the application is composed by a panel, and a picture box. The picturebox is placed inside panel, and the image will show inside pictureBox (fixed). Then I need to make 2 dash line that are able to "drag" left/right like a splitter in order to let user measure the length of picture.

Does any experts made an example like this?
or do you know where has this type of example?
I'm quite urgent to do this. Please help and guide me on right way..
Thank you very very much !!

Re: drag-drop dash line ??

leppie5-Jul-03 0:35

leppie

5-Jul-03 0:35

Have a look at my MyDUMeter article. I did something in the Report View that sounds similar to what you want to do.

http://www.codeproject.com/useritems/MyDUMeter.asp[^]

Hope it helps Smile | :)

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Re: drag-drop dash line ??

azusakt6-Jul-03 15:43

azusakt

6-Jul-03 15:43

Hi, Leppie,
Thank you very much for your reply. You did a great job, however, it's a little bit hard for me. I'm sorry, I'm stupid... Frown | :(

I don't need to do such powerful as your's, I just need a control that is movable dash line. I would like to move the line over picture. I know it's bascially as same as your's. But could you explain it more to me, or teach me how to make this control.

Thank you very very much

Beta Version of KingTermite.Net

KingTermite4-Jul-03 15:07

KingTermite

4-Jul-03 15:07

Hi all. I apologize to the mods if this is against the rules..I'm not sure where to find the rules anymore.

Just announcing my new website meant to be a code developer type of website like this one, only on a much smaller (mostly personal) scale. Please feel free to stop by and discuss things. Smile | :)

KingTermite.Net

KingTermite

There are only 10 types of people in this world....those that understand binary, and those that do not.

send user event for C# to C++

troels_sorensen4-Jul-03 13:11

troels_sorensen

4-Jul-03 13:11

Hi.

I'm writing a new app in C# where i'm using an old C++ app written in Power++. in my C# app i'm writing files whisch will be read by the C++ app. the C++ app is started from my C# app using the "proces" class in the .NET framework.
Before the C++ app will read the files it has to recieve a user event (WM_USER Event) from my C# app. My question is this:

How do i genereate a event in my C# app with the appropriate data that will be seen by the c++ app?

for the record: i Usually code C#. I do not code C++. i can read it but not well.

I have access to the sourcecode of both app's but I am not interestest in changeing the C++ app.
I have pasted a small part of the c++ app where i think the "eventlistener" is created.
------------------
WBool Form_POSManager::Form_POSManager_User(
WObject * source,
WUserEventData * event )
{
FindPOSFiler(event->data);
return FALSE;
}
----------------

I have abserlotely no idea how i am going to generate or send the event from C#.
Can anyone help me out?

//finger

Re: send user event for C# to C++

Anonymous8-Jul-03 4:19

Anonymous

8-Jul-03 4:19

i found the solution:
http://www.gotdotnet.com/Community/MessageBoard/Thread.aspx?id=119342&Page=1#119937

Re: send user event for C# to C++

Troels_soerensen8-Jul-03 4:21

Troels_soerensen

8-Jul-03 4:21

i found the solution:
http://www.gotdotnet.com/Community/MessageBoard/Thread.aspx?id=119342&Page=1#119937

drawing part of component outside parent window?

misterbear4-Jul-03 10:36

misterbear

4-Jul-03 10:36

Hello,

I'm currently looking in to making a modified dropdown control, and as with the standard dropdown in .NET API I want to be able to let it extend outside
the bounds of the window containing it if necessary. So how do I go about to do this? I really don't know where to start (or, I would give WIN32 API as an educated guess, but...)

does anyone have any information/hints/references to help me?

/Bjorn

C# question

ClintChin4-Jul-03 8:38

ClintChin

4-Jul-03 8:38

I am new in C#, can someone please tell me what's the best solution writing a console application for this scenario:

A manufacture sells the following vehicles: trucks and motocycles. They want to be able to track the vehicles by model, color, and price. In additioni to the above shared information, they also need to track engine type for trucks. Also, they need to track tire size for motorcycles. Finally, they want a function to display the data for their vehicles.

Thanks in advance.

CT

Re: C# question

leppie4-Jul-03 10:47

leppie

4-Jul-03 10:47

Sounds like its time for DataBases 101 Smile | :)

There are many beginner articles on database right here on Code Project.

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.