Windows collision - C# Discussion Boards

lmoelleb14-Oct-07 7:20

14-Oct-07 7:20

It's .NET 3.0. You will need some CTP plugins to Visual Studio 2005, or the beta release of VS2008.

While it is pretty new, the plans for it are not. There is a reason the temporary WinForm hack was stuffed into the System.Windows.WinForm namespace - it left the main namespace System.Windows free for WPF.

Re: Paint.NET

MasterSharp14-Oct-07 7:22

MasterSharp

14-Oct-07 7:22

Thanks; do you know anything else, I mean, simpler, (I'm fairly new), with no downloads or anything, just a ref or something?

The most knowledge doesn't mean the most wise...

Re: Paint.NET

lmoelleb14-Oct-07 7:32

lmoelleb

14-Oct-07 7:32

Nope, sorry.

Maybe being new to this is just more of a reason to go to WPF. I have been using WinForm since the betas of .NET 1.0 and unlearning the stupidity and completely outdated methodology of it is a challenge. Smile | :)

Re: Paint.NET

Pete O'Hanlon14-Oct-07 10:13

Pete O'Hanlon

14-Oct-07 10:13

Have a read of Christian Graus' here on CodeProject about graphics and GDI+. He goes into the theory of how to do effects based graphical stuff in C#. They are very good.

Deja View - the feeling that you've seen this post before.

Re: Paint.NET

MasterSharp14-Oct-07 10:15

MasterSharp

14-Oct-07 10:15

hey, thanks. Do I just look at his articles?

The most knowledge doesn't mean the most wise...

Re: Paint.NET

Pete O'Hanlon14-Oct-07 10:21

Pete O'Hanlon

14-Oct-07 10:21

He has source code and samples that you can download and try. Plus, he explains why he has done things the way that he has. Here's[^] the link to follow.

Deja View - the feeling that you've seen this post before.

Re: Paint.NET

Christian Graus14-Oct-07 11:41

Christian Graus

14-Oct-07 11:41

The core answer here is that if you want to do any sort of drawing, you should just draw directly on the form, in almost all cases. As Pete said, my image processing articles do offer a library you can free use for things like blur. Because I was trying to illustrate some core concepts with my code, I never use color matrixes, which are almost certainly a faster option for things like greyscale. You might want to also check out the source for the fotovision sample ( or paint.net ) to see if they do things in a way that's more optimised than my articles, which are designed around teaching how to write certain types of generic filter and then how to do different effects within that framework.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Windows collision

MasterSharp14-Oct-07 5:53

MasterSharp

14-Oct-07 5:53

DOes anyone know a way of checking collision between a picturebox? I found a way, but I deleted it because it worked only sometime, and other let the object pass right through. I used (Something like this...)

private void CheckCollision()<br />
{<br />
    int x = picturebox1.Location.X;<br />
    int y = picturebox1.Location.Y;<br />
    int ex = picturebox2.Location.X;<br />
    int ey = picturebox.Location.Y;<br />
  <br />
// assuming both boxes are 20 units l/w<br />
<br />
    if ((x + 20) == ex<br />
&& //things that tell if you are below / above box...<br />
|| // ditto<br />
    this.Close();<br />
<br />
// there were more things to the if and it worked, but after 1 collision it stopped working<br />
}

So, my real question (I was just showing you basically the idea I had), is if there's a simpler way to do this. Thanks in advance.

The most knowledge doesn't mean the most wise...

Re: Windows collision

Kristian Sixhøj14-Oct-07 6:46

Kristian Sixhøj

14-Oct-07 6:46

Look at the picturebox1.Bounds.IntersectsWith() function.

Here's an example I made long time ago:

if (pictureBox1.Bounds.IntersectsWith(pictureBox2.Bounds))
{
    MessageBox.Show("Collision!");
}

Virtual1ty

"Any fool can learn from his own mistakes, but a wise man learns from mistakes of others"

Re: Windows collision

MasterSharp14-Oct-07 6:55

MasterSharp

14-Oct-07 6:55

It's so easy! I mean, really, even for squares/rectangles, it's easy! Thanks a lot.

The most knowledge doesn't mean the most wise...

Re: Windows collision

Kristian Sixhøj14-Oct-07 7:16

Kristian Sixhøj

14-Oct-07 7:16

You're welcome Smile | :)

Virtual1ty

"Any fool can learn from his own mistakes, but a wise man learns from mistakes of others"

Re: Windows collision

MasterSharp14-Oct-07 7:19

MasterSharp

14-Oct-07 7:19

Do you know anything about my post above??? ^ ^ ^ Smile | :)

The most knowledge doesn't mean the most wise...

Re: Windows collision

Kristian Sixhøj14-Oct-07 7:21

Kristian Sixhøj

14-Oct-07 7:21

Your first post?

Virtual1ty

"Any fool can learn from his own mistakes, but a wise man learns from mistakes of others"

Re: Windows collision

MasterSharp14-Oct-07 7:23

MasterSharp

14-Oct-07 7:23

"Paint.NET"

The most knowledge doesn't mean the most wise...

Re: Windows collision

Kristian Sixhøj14-Oct-07 7:27

Kristian Sixhøj

14-Oct-07 7:27

Sorry, I don't Smile | :)

Virtual1ty

"Any fool can learn from his own mistakes, but a wise man learns from mistakes of others"

Re: Windows collision

MasterSharp14-Oct-07 7:30

MasterSharp

14-Oct-07 7:30

Thanks anyways.

The most knowledge doesn't mean the most wise...

carrer gudiance

sid_si14-Oct-07 4:56

sid_si

14-Oct-07 4:56

i am not sure if i am on right site. i am wondering if you can help me. i am seeking some
carrer advice/guidance from you.

i use to work in totally different industry than IT. two month
ago i have resigned my job and made up my mind to jump in to IT industry, cos i was really
bored with my previous job. so i have started studies C# lang. as i have never done
programming before. it is quite challenging for me. i m not attending any class room
course/coaching, only studying at home, cos canot afford course in UK.

As i m studying C#, i am almost at stage of finishing my book and i find it interesting.
with that i have lots of question flowing in my head. it will be great , if u could give
me guidiance on following :

1. i m alomost there to finish my book, but i just wonder there is so many concept in it
and how m gonna join all together to make software or program

2. is it possible i can pratice C# langauge , if yes then how? like through books ,
dummies project or pratice software and where can i get these stuff from which is suitable
for fresher/new commer not for people who is allready in developing software. as i m not
taking any coaching i dont have lab sessions.

3. how can i prepare myself for interview or what kind of question they ask, and how whole
interview process run?

4. should i studying any additional material to go with c#, which will help me getting job
easily in UK or which better for my carrer.

i m so soory to ask so many question bcos i am so confuse and i have no one else to ask
apart from using internet. thanks for reading my mail. i will appriciate if you could
help.

many thanks

sid

Re: carrer gudiance

J4amieC14-Oct-07 5:15

J4amieC

14-Oct-07 5:15

Hi welcome to CodeProject.

Can I start by pointing out that this is not the right forum for this sort of question, it would be better suited to somewhere like General Discussion or Work Issues. This forum is for specific programming questions with the C#language.

sid_si wrote:
i m alomost there to finish my book, but i just wonder there is so many concept in it
and how m gonna join all together to make software or program

This is almost impossible to answer other than to say that the more you practice the individual concepts the more they click into place as a whole. Read Books, download examples, learn from others.

sid_si wrote:
is it possible i can pratice C# langauge , if yes then how?

Microsoft provide "Express Editions" of the Visual Studio progrramming environments which are free. Search for the one that is most suitable for you.

sid_si wrote:
how can i prepare myself for interview or what kind of question they ask, and how whole
interview process run?

The same way as you would prepare for any interview; learn a little about the company, and what sort of person they are after. Learn what technologies they are using and what products they provide.

As far as the interview process goes, most programming jobs have a normal interview followed by one or more technical "tests" or interviews. Do not attempt to bullshit this part as you will find yourself in a job that you have no idea how to do which will rapidly lead to you being out of a job!

sid_si wrote:
should i studying any additional material to go with c#, which will help me getting job
easily in UK or which better for my carrer.

Frankly if all you know is C# then you are unlikely to get a job. GO and have a look on monster.com at jobs advertising for C# (or .NET) developers and see the list of other skills that employers are looking for.

Apart from that programmers are problem solvers. If you have a good brain for figuring out puzzles and like logic problems then thats a damn good start. Another thing that is vital is the ability to search for the answers to things. Which means that all the questions you have asked above can be answered by a bit of research on your part.

Finally one thing that ALL employers in ALL fields are looking for is a good literate person who can communicate well. I suggest you get out of the habbit of the over use of words like "bcoz" and "ur" as well as touching up your general spelling.

Good luck.

---

How to get answers to your questions[^]

Re: carrer gudiance

sid_si14-Oct-07 5:25

sid_si

14-Oct-07 5:25

thanks mate

how to write?

s4_sabahatf14-Oct-07 4:24

s4_sabahatf

14-Oct-07 4:24

OleDbConnection m_Connection = new OleDbConnection();
m_Connection.ConnectionString =@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:user.mdb";
m_Connection.Open();
//m_Connection.Close();
Can any one tell me that how could i write edit command using this db

Re: how to write?

Roger CS14-Oct-07 6:14

Roger CS

14-Oct-07 6:14

Essentially you have four things you can do: SELECT, INSERT, UPDATE and DELETE. When you edit a record you first SELECT the record, make changes then use UPDATE to save the changes to the database. Go to msdn.com and click the Library link, search for OleDbDataAdapter. Here's an example from...

<br />
public DataSet CreateCmdsAndUpdate(DataSet myDataSet,string myConnection,string mySelectQuery,string myTableName) <br />
{<br />
    OleDbConnection myConn = new OleDbConnection(myConnection);<br />
    OleDbDataAdapter myDataAdapter = new OleDbDataAdapter();<br />
    myDataAdapter.SelectCommand = new OleDbCommand(mySelectQuery, myConn);<br />
    OleDbCommandBuilder custCB = new OleDbCommandBuilder(myDataAdapter);<br />
<br />
    myConn.Open();<br />
<br />
    DataSet custDS = new DataSet();<br />
    myDataAdapter.Fill(custDS);<br />
<br />
    //code to modify data in dataset here<br />
<br />
    myDataAdapter.Update(custDS, myTableName);<br />
<br />
    myConn.Close();<br />
<br />
    return custDS;<br />
 }<br />

OleDB

s4_sabahatf14-Oct-07 4:10

s4_sabahatf

14-Oct-07 4:10

System.Data.OleDB.OleDBConnection();// OleConn;
System.Data.OleDB.OleDBConnection OleConn;
"Provider=Microsoft.Jet.OLEDB.4.0; Data source=C:\tony.mdb";
OleConn.Open();

the following code is giving error
OleDB namespace not exist??
please tell how to tackle that error and how to acess the database

Re: OleDB

Hesham Amin14-Oct-07 4:31

Hesham Amin

14-Oct-07 4:31

The code should be:

System.Data.OleDb.OleDbConnection OleConn = new System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data source=C:\tony.mdb");
OleConn.Open();

Hesham A. Amin
My blog

Method timeout

martin_hughes14-Oct-07 3:40

martin_hughes

14-Oct-07 3:40

I've found this, potentially, useful code example on the Interweb:

delegate object WorkDelegate(string arg);
public object DoWork(string arg)
{        
    WorkDelegate d = new WorkDelegate(DoWorkHandler);
    IAsyncResult res = d.BeginInvoke(arg,null,null);
    if(res.IsCompleted == false)
    {
        res.AsyncWaitHandle.WaitOne(10000,false);
        if(res.IsCompleted == false)
            throw new ApplicationException("Timeout");
    }
    return d.EndInvoke((AsyncResult)res);
}
private object DoWorkHandler(string arg)
{
    Thread.Sleep(5000);
    return "blah " + arg;
}

From here: http://www.developerfusion.co.uk/show/4497/[^]

The intent is to allow a synchronous method to timeout - I'd like to use this as I have to make a call to a barcode scanner api, which has no built in timeout and is prone to hanging/crashing/locking up my application when it fails.

Can any of the more experienced denizens of this handy forum spot any problems with it? Is there a huge "gotcha!" anywhere?

Me: Can you see the "up" arrow?
User:Errr...ummm....no.
Me: Can you see an arrow that points upwards?
User: Oh yes, I see it now!

-Excerpt from a support call taken by me, 08/31/2007

Re: Method timeout

TJoe15-Oct-07 4:07

TJoe

15-Oct-07 4:07

This may return control to the caller of DoWork after the timeout, but it does not stop the DoWorkHandler from executing. The BeginInvoke is going to execute on a thread from the ThreadPool. If you have lots of orphaned DoWorkHandlers running, then you could tie up all the threads available from the pool. There are some classes in the .Net framework that use the thread pool. So you may see other problems, if they are starved for ThreadPool threads. Your best bet is to timeout in DoWorkHandler.

Also, the timeout exception should use this[^].

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

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