Comments by Nguyen.H.H.Dang (Top 24 by date)

Thanks for the solution :D

Base on my current application (developed on WinForm and .NET 4.0), this is a list of features :

1. Text Communication : User can chat (send text) to another Users (i treat one to one chat the same as Group chat - cause i think its just a "group" of 2 users)

2. File share : User can send file to others, but i have a problem with large size file

3. When login on, the main "Form" is showing all online Users (just like Skype)

4. I checked who is online or prevent same user login in 2 PC by : about 1 minute, if server doesnt receive any signal from client, that client will be kick out

5. I'm prospecting about 100-500 users

But at now, i realize there are many problems in my code. Its so hard to maintenence and add more features. So i wanna re-write it, but have no idea about how to do it by a proper way.

And yes, by your suggestion, i wanna make 1 version to run on Mobile.

Can you show me how to do that ? Or any reference source is OK (like some of classe diagrams)

Thanks for replying :D

Its a Desktop Application, can you give me some advises ?

Thanks for replying !

I have done the application before, but my code is hard to maintenance and upgrade and without an architect. So, i wanna re-write the application, and wanna learn how to do it the right way. Googled about it, and found some free sources using those 2 patterns.

May be i made a beginner's mistake when trying to "implement a pattern". But, can you give me some advise about where should i begin ?

Thanks again for reading, and sorry for my bad English.

CodeProject - For those who code, not for a lazy look for someone to code something for him

My solution just like Solution 1 and Solution 2 here, read and think about it please.

XML parsing is very easy, please Google it with some keywords like "c# mvc 4 XML"

May i ask you why you don't wanna use MAC address ?

Debug it, make a checkpoint at the print method, and determine if this method is called 5 times or not

Yes, it possible, but ERP system is very big, i cannot answer you WHAT to do to because even you don't know what you NEED to do :|

Eer... may be an impolite question, but do you know how to debug your code ?

I'm not good at using WinAPI, but do you know how to detect if ActiveWindow's Bound is intersect with ApplicationWindow ? My idea is, check if Active window is ON (intersect with) application window, if TRUE get the active window location, calculate if that location is ON application window's textbox (sth like point to client). If TRUE, get screen shot.

You wanna take a Screen Capture of Active Window, right ? I think drag drop event cannot do this. So, if you can find how to detect if user MOVE active window TO your textbox, you can screen shot that window.

P/s: i think, capture a window's screen shot is an easy task, the hard part is determine WHEN to do that.

Sorry about the confusing, English is not my mother language :(

I think you must find which is Active Windows, then determine if that active windows is overlapping which your textbox

I dont like using foreach loop too, but if you really wanna use it, and textbox has more than 2 lines, this solution is good enough : (FONT = Courier New)

richTextBoxColumns.Text = " 1 2 3 4 5\r\n";
richTextBoxColumns.Text += "12345678901234567890123456789012345678901234567890\r\n";
richTextBoxColumns.Text += "12345678901234567890123456789012345678901234567890\r\n";
richTextBoxColumns.Text += "12345678901234567890123456789012345678901234567890\r\n";

int pos = 19;
int length = 0;
foreach (var line in richTextBoxColumns.Lines)
{
richTextBoxColumns.Select(length + pos, 1);
richTextBoxColumns.SelectionBackColor = Color.Yellow;
richTextBoxColumns.SelectionColor = Color.Red;
length += line.Length + 1;
}

@George Jonsson: I think the best way to let him know how to do things is show him what's wrong. That's how i learned programming too :)

About my solution, if he know what is wrong, he will know how to solve it :)

The easiest way is looping.

You have DataTable A and DataTable B, right ?

First, declare a result DataTable C

So, just loop row by row, compare A's rows with B's rows, if match, add that row to C. If not match, add a row with 0 value to C.

Done !!! :)

It base on "how you save your old Data".

Example, if you can save your Data first, then after do something like change value, remove space ..v..v... you can revert back to your old Value.

save your value first -> [remove space,remove special symbol] -> (if need) restore old Value

What do you mean in "select multiple canvas" ? Please provide more information.