C# Discussion Boards - CodeProject

14-Jul-08 3:24

Lets say i have a custom control with the following private variable and property

private DateTime myTime = new DateTime();
public DateTime MyTime
{
    get
    {
        return myTime;
    }
    set
    {
        myTime = value;
        textBox.Text = myTime.TimeOfDay.ToString();
    }
}

does the property(specifically the set block) get run upon construction of the control?

Cuz what happening is the textBox is Showing 00:00 at startup and its supposed to be blank...

any ideas?

Thanx

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)

leppie14-Jul-08 4:07

leppie

14-Jul-08 4:07

HarveySaayman wrote:
private DateTime myTime = new DateTime();

HarveySaayman wrote:
Cuz what happening is the textBox is Showing 00:00 at startup and its supposed to be blank...

And that's exactly what you told it to do! I am sure you can see the error now Smile | :)

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Harvey Saayman14-Jul-08 4:18

14-Jul-08 4:18

hey leppie

i get that the variable is 01/01/0001 00:00, but what i dont understand is the set block executing on construction(assumption)...

the Variable should be 01/01/0001 00:00 but in the TextBoxTextChanged_Handler i have something like this...

TextBoxTextChanged(object sender, EventArgs e)
{
    try
    {
        MyTime = DateTime.Parse(((TextBox)sender).Text);
    }
    catch
    {
    
    }
}

so then ONLY when a user changes the text value AND it can be parsed to a DateTime will the property change.

but it seems like the initial 01/01/0001 00:00 value of myTime somehow gets written in my textbox Confused | :confused:

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)

leppie14-Jul-08 4:38

leppie

14-Jul-08 4:38

It is really ASP.NET, but you forgetting to save the DateTime in ViewState. Hence it will be reset everytime.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

Alan Balkany14-Jul-08 4:38

Alan Balkany

14-Jul-08 4:38

In C# all variables have an initial value of zero, which results in the date and time you're getting. I don't understand how it gets written into the text box.

So, put a break point in the set method of your property, run the code, and look at the call stack to see what is calling your set method. (This is one of the advantages of properties over public variables; it's easy to inspect what's changing the value.)

DaveyM6914-Jul-08 4:41

DaveyM69

14-Jul-08 4:41

If you look in the Form's designer.cs file you'll see that it is initializing the MyTime public property which is why the setter is being called.

You could remove that line from the designer file but it'll keep getting put back when any changes get made to that form.

Dave

Harvey Saayman14-Jul-08 4:50

14-Jul-08 4:50

OMG your right Unsure | :~

this screws my logic around quite a bit!

is there any way that you can think of around this? accept removing the lines...

thanx

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)

DaveyM6914-Jul-08 5:10

DaveyM69

14-Jul-08 5:10

A bit dirty but maybe have a private bool updateEnabled = false; and put the code in set inside

if(updateEnabled)
{
    // setter code
}
else
{
    updateEnabled = true;
}

Dave

Harvey Saayman14-Jul-08 5:18

14-Jul-08 5:18

thanx, i was thinking something similar... like

public DateTime BreakStart
{
    get
    {
        return breakStart;
    }
    set
    {
        breakStart = value;
        if (breakStart != new DateTime())
        {
            mtxtBreakStart.Text = breakStart.TimeOfDay.ToString();
        }
    }
}

DaveyM69 wrote:
A bit dirty

i agree and my solution is dirty as well, but i don't see any other way... the main reason is cuz my drawing methods bool variables (like DrawData(), etc) is set to true if certain groups of textBoxes can be Parsed to DateTime successfully. That's why i cant have the 00:00 unless the user specifically entered it, the drawings get all messed up.

i thank you again for your help, i dont think i would have found the problem without you...

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)

Pick out a part of a textfile

DaveyM6914-Jul-08 5:26

DaveyM69

14-Jul-08 5:26

No problem Big Grin | :-D

Dave

Customizing Setup Wizard

Member 384581514-Jul-08 3:04

Member 3845815

14-Jul-08 3:04

Hi,

Am working with Windows application in VS 2008,where i need to customize the set up wizard.Is that possible?If so,what are the needed steps to be do the customizing process?

Regards,
Priya

Ixzat14-Jul-08 2:35

Ixzat

14-Jul-08 2:35

I have a textfile(html document) that i want to parse some specific information from. Is there a way built in to C# that enables me to look for a specific starting pattern and ending pattern in a text document and then read that line by line?

Re: Pick out a part of a textfile

CPallini14-Jul-08 2:54

search a keyword (query) in a big text

14-Jul-08 2:54

Oh, there is a wonderful tool [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Splash Form

jonhbt14-Jul-08 2:17

jonhbt

14-Jul-08 2:17

Can someone tell me or relate me to an article of how to create a splash form for windows application please? thank you

Re: Splash Form

Pete O'Hanlon14-Jul-08 2:24

Pete O'Hanlon

14-Jul-08 2:24

A quick search in the article search found this[^] one.

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

My blog | My articles

Re: Splash Form

Giorgi Dalakishvili14-Jul-08 2:53

Giorgi Dalakishvili

14-Jul-08 2:53

Here you are: Use the ApplicationContext Class to Fully Encapsulate Splash Screen Functionality[^]

Giorgi Dalakishvili

#region signature
my articles
#endregion

enginço14-Jul-08 2:04

enginço

14-Jul-08 2:04

hi, firstly sorry for my bad english Smile | :)

List<string> _AllKWs = new {"simple", "object",...};

string lngText= "For most any Serializeable object, making a Debugger Visualizer is exceeding simple and examples abound. However, if you are trying to build a Debugger engin for an object which is not Serializable or takes too long to Serialize and Deserialize, things are not quite so simple......";

var sss = from kw in _AllKWs
where longText.Contains(kw)
select kw;

foreach (string item in sss)
{
Console.WriteLine(item);
}

this code is very simple. The code above is searchs the kws in a big text and lists founded kws.

but I want to do much complex.
I chenged kWs like this :

List<string> _AllKWs = new {"Debugger NOT Debugger engin", "object AND Serializable",...};

1. scenario
it must find only "debugger". If the followed keyword is "engin" it won't be listed kw.

2. scenario
I want to find "object" kw. But "Serializable" kw is must exist somewhere in the text.

thanx...

CPallini14-Jul-08 2:56

14-Jul-08 2:56

There's a powerful tool fur such things [^].
Smile | :)

enginço14-Jul-08 3:04

enginço

14-Jul-08 3:04

is it possible with LINQ or EXPRESIONs? are there any easy way?
I can write some methods, yes, but I can't visualize that efficiency.

by the way I don't now how to use REGEX Frown | :(

CPallini14-Jul-08 8:29

14-Jul-08 8:29

enginço wrote:
by the way I don't now how to use REGEX

Good time to learn. They're sooooooo powerful!
Smile | :)

Rajesh R Subramanian22-Jul-08 23:35

Rajesh R Subramanian

22-Jul-08 23:35

And here too. Hmmm | :|

See here[^] Suspicious | :suss:

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

CPallini22-Jul-08 23:43

22-Jul-08 23:43

Thanks.

Rajesh R Subramanian wrote:
See here

Balanced.

Rajesh R Subramanian22-Jul-08 23:46

Rajesh R Subramanian

22-Jul-08 23:46

Occasionally I go to the "messages posted" page of yours (and a few others too), just to find and fix those unfair votes. A dirty job, but someone has to do it. Hmmm | :|

Thanks for the vote BTW. Smile | :)

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

CPallini22-Jul-08 23:54