Re: how to block code of ItemCheck event of CheckedListBox - C# Discussion Boards

Stefan Troschuetz26-Mar-07 5:51

26-Mar-07 5:51

I'm also a great fan of the XmlSerializer but according to a discussion I recently had in the XML forum it does not support the IDictionary interface. Therefore instances of the Dictionary though marked as Serializable cannot be used with the XmlSerializer.

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

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Re: Easiest way to load Xml?

Judah Gabriel Himango26-Mar-07 6:50

Judah Gabriel Himango

26-Mar-07 6:50

Stefan Troschuetz wrote:
it does not support the IDictionary interface

You're right, however, there are workarounds[^].

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Re: Easiest way to load Xml?

Stefan Troschuetz26-Mar-07 8:02

Stefan Troschuetz

26-Mar-07 8:02

Thanks for the link. I'll bookmark that one Smile | :)

Re: Easiest way to load Xml?

Mark A. Nicolosi26-Mar-07 13:13

Mark A. Nicolosi

26-Mar-07 13:13

Thanks Juda, I'll give that a try. I think this is exactly what I'm looking for.

--
Mark A. Nicolosi

how to block code of ItemCheck event of CheckedListBox

pashitech26-Mar-07 3:42

pashitech

26-Mar-07 3:42

Hi all,
i'm working on CheckedListBox, where in which i am using itemCheck event To capture the checked and unchecked values of checkboxes of CheckedListBox,
But here if Am loading some values

Re: how to block code of ItemCheck event of CheckedListBox

Christian Graus26-Mar-07 4:20

Christian Graus

26-Mar-07 4:20

The common thing to do is to set a flag that tells you to ignore the event, within the event itself. If it's on page load tho, you could just hook up the event handler AFTER setting your values.

Christian Graus - Microsoft MVP - C++
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Re: how to block code of ItemCheck event of CheckedListBox

pashitech26-Mar-07 4:40

pashitech

26-Mar-07 4:40

ya i've taken a flag, saying for the first time[when count is zero] i have restricted my itemCheck event code,
but its not working

int count=0;
if (count != 0)
{

if (e.NewValue == CheckState.Unchecked)
{
lstChcked.Items.Remove(chklstMultipleMdfyTbl.SelectedItem.ToString());
}

else if (e.NewValue == CheckState.Checked)
{
//ChklbxAdd= Convert.ToString(chklstMultipleMdfyTbl.CheckedItems.Count);
// string[] ChklbxFill = new string[chklstMultipleMdfyTbl.CheckedItems.Count];
lstChcked.Items.Add(chklstMultipleMdfyTbl.SelectedItem.ToString());

}
}
else
{
MessageBox.Show("try to restrict this event");
}

}

I DIDN't Understand ur last line,
***you could just hook up the event handler AFTER setting your values.**

reply please

prashanth,
s/w Engineer,
Syfnosys.

Re: how to block code of ItemCheck event of CheckedListBox

Stefan Troschuetz26-Mar-07 5:43

Stefan Troschuetz

26-Mar-07 5:43

pashitech wrote:
I DIDN't Understand ur last line,
***you could just hook up the event handler AFTER setting your values.**

It's the same thing I'm telling you over and over again.

BTW, your count flag cannot work since you obviously defined it inside the event handler, so it will always have the same value (0) when execution reaches the if statement. The flag has to be an instance field that preserves its value between subsequent executions of the event handler. Furthermore, it would be sufficient to use a boolean instead of an int.

Re: how to block code of ItemCheck event of CheckedListBox

pashitech26-Mar-07 6:02

pashitech

26-Mar-07 6:02

Thnx alot, and i am done with it,
ya i've used bool and used in pageload event.

at last,1 morre,
do u know any alternate method, to deselect all the checked values of Checkedlistbox.

for (int i = 0; i < CHECKEDLISTBOX1.Items.Count; ++i)
{
CHECKEDLISTBOX.SetItemChecked(i, false);

}
if i use this, the total days work is vanishing--i mean the rest of the code that u've helped me is not working,
anyway thnx alot for ur help,
bye byes

prashanth,

creating set up

praveen pandey26-Mar-07 2:42

praveen pandey

26-Mar-07 2:42

hi all,
how to create setup file for a windows application so that user can uninstall the application without going to control panel that he should get a sub menu in all programs menu along with menu to launch the application.

thanks and regards,
praveen

Re: creating set up

Judah Gabriel Himango26-Mar-07 5:59

Judah Gabriel Himango

26-Mar-07 5:59

In Visual Studio, add a Setup project. Click on the setup project's file system editor. Right-click, add special folder-> users start menu. There, add a shortcut to the uninstaller.

Tech, life, family, faith: Give me a visit.
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The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

WinForms - edit a TabPage separately

peterchen26-Mar-07 2:29

peterchen

26-Mar-07 2:29

I am trying to create a TabPage as separate object. I can edit them iside s tab control allright, however, I can't create or edit the control layout of a separate TabPage.
When I create a user control (or a form), and change the base class to "TabPage", the editor changes to a generic controll collection.

What can I do?

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Re: WinForms - edit a TabPage separately

Judah Gabriel Himango26-Mar-07 5:50

Judah Gabriel Himango

26-Mar-07 5:50

I don't think there is a Visual Studio designer that allows you to layout tab pages visually. If you really need this, I think you're going to have to create your layout as a custom control, then add that to the tab page at design time.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: The "Church" at Mt. Sinai
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: WinForms - edit a TabPage separately

peterchen26-Mar-07 10:42

peterchen

26-Mar-07 10:42

This actually was easier than I thought - thanks! Big Grin | :-D

Problem with Visual studio.Net

Vimalsoft(Pty) Ltd26-Mar-07 2:02

Vimalsoft(Pty) Ltd

26-Mar-07 2:02

WHEN I WRITE CODE, visual studio.net unexpectactly closes, and restart itself, i get the following errors.
OSK.EXE title
System Failed to initialize

and the second Error is VCSPAWN.EXE TITLE
APPLICATION FAILED TO INITIALIZE

I HAD A CODE THAT CONNECT TO SQL7 DB, IT CONNECT VERY WELL AND DISPLAY THE CONTENTS OF MY TABLE, BUT AFTER THAT IT ATTEMPT TO SHUTDOWN. I HAVE SCREEN SHOTS OF THE OCCURANCE, BUT I DONT SEE AN OPTION TO ATTACH IN HERE SO YOU CAN SEE, PLEASE PROVIDE ME WITH YOU E-MAIL I WILL ATTACH IT. THANKS
NOTE:THIS HAPPEN AFTER I FORMAT THE PARTITION, AND I FIRST INSTALL VISUAL STUDIO 2003.
PLEASE HELP

Vuyiswa

Re: Problem with Visual studio.Net

originSH26-Mar-07 2:18

originSH

26-Mar-07 2:18

WRITING IN ALL CAPS IS JUST ANNOYING AND WONT MAKE ANYONE HELP!

*ahem*

Anyway did you bother searching? It takes less time to open up google and search for something than it does to post on here ...

http://www.google.co.uk/search?hl=en&q=vcspawn.exe&meta=[^]

Now repeat after me: "I will always search before posting multiple times in a forum and in caps"

Edit: spelling X(

Detecting Flash disk or Memeory stick??

kingbode26-Mar-07 2:01

kingbode

26-Mar-07 2:01

I was searching for how windows detect MMC or SD or Flash disk and bring up a dialog that gives you options to open folder or in windows media player..etc. ...

I want to build application that make the same...

I had made an application that detect any change in disks generally but for example ( I'm intereted in MMC ) my application can detect the memory reader when it's plugged or unplugged but when I insert a memory stick in the reader it doesnot detect any change ...should I make timer that watch the memory reader all the time!! I think it's not good way..so any one has any solution for this??? and this dialog that windows brings up is from shell32.dll so any one knows how to know the function and its parameters??

thanks in advance

Re: Detecting Flash disk or Memeory stick??

Niiiissssshhhhhuuuuu26-Mar-07 3:22

Niiiissssshhhhhuuuuu

26-Mar-07 3:22

Hello king,

try this
http://www.codeguru.com/forum/showthread.php?t=371678&goto=nextoldest[^]

Regards Rose | [Rose]

,

Nishu

Wheres my data when app.config is an Embedded Resource

Christopher Stratmann26-Mar-07 1:56

Christopher Stratmann

26-Mar-07 1:56

Ok I you create a new C# windows project and then create a ".settings" with an item (string) and (user) as the type. Now this will create an app.config file associated with the project. Go into the properties for the app.config and change the Build Action to (Embedded Resource). Now in your windows form create and edit box and a button which loads and saves the setting that your created.

Build the project. Go into the bin folder and click on the exe file to run the project. Try changing the settings and saving the settings. Close the project and load it back up by clicking on the exe file to verify that the save works which it will.

BUT WHERE DOES IT SAVE TOO??????????

I cant figure it out......

Chris

Re: Wheres my data when app.config is an Embedded Resource

Hayder Marzouk26-Mar-07 2:20

Hayder Marzouk

26-Mar-07 2:20

Hi,
It saves it somewhere in C:\Documents and settings\UserName\LocalSettings\Application Data \Your Application Name .Exe XXXXXXXXXXXXXXXXXXXXXXXXXXX\VersionNumber\user.config

Try search *.config in your documents and settings and u will find it.
That's because .Net wants to save Config settings for each Windows user. so it does not touch the application.config file that can be shared between many users.

That happens even u don't set the Build action to Embedded Resource wich is not logic because the config file must not be embedded in the exe.

HTH.
Hayder Marzouk

Re: Wheres my data when app.config is an Embedded Resource

Christopher Stratmann26-Mar-07 2:25

Christopher Stratmann

26-Mar-07 2:25

Thanks I see it.

Scope of Refereances to Instances

MehmetFurkan26-Mar-07 1:42

MehmetFurkan

26-Mar-07 1:42

Hi, I am just beginner in .NET with C#. In my study, I have learned that when an instance of a class created in the heap is not owned by reference (a variable of that class) , the Garbage Collector (GC) removes this instance from the memory after a while. In my first small application in .NET, I hasitate in a point that When I am testing a click event of a button control of my Form1 class, I declared a variable of type a Form class (let's say Form2). The View is like this:

private void button1_click(....)
{
Form2 myForm2 = new Form2();
myForm2.Show();
}

Here when the execution gets out of the click event, then I expect that the local "myForm2" becomes out of scope for availibility. But my new form (Form2) still apears on my screen. Why? Cause no availiable reference to this Form2 instance anymore, immediately after the button click event routine. Anything I need to know more about "scopes" and GC ?

Re: Scope of Refereances to Instances

rah_sin26-Mar-07 1:55

rah_sin

26-Mar-07 1:55

As u have created reference of form2 from form1's button click event so this reference of form2 will remain in scope till the form1 is in scope and as soon u will close the form1 the reference of form2 will also be lost and GC will reclaim the memory back and will close the form2 also.

rahul

Re: Scope of Refereances to Instances

MehmetFurkan26-Mar-07 4:37

MehmetFurkan

26-Mar-07 4:37

First, I'd really like to thanks to you rah_sin for your answer..

I need one more point: What you explain is valid for only class of Form or those inherited from Form class? Cause as you hv seen in my example the refernce "myForm2" is not a direct member of Form1 class but a local declaration in button click event. Or should I understand that Show() method of Form class, saves or register its reference into a global collection internally or somewhere in caller form ?

In other words, what if my locally declared variable was of simple class like:

class Sample
{
private string sName;
private int nIdNumber;

public Sample()
{
//...
}
public string Name
{
get {...}
set {...}
}
//...
}

private button_click(....)
{
Sample mySample = new Sample();
mySample.Name = "Testing Name";
}

get data in background for datagridview

Seishin#26-Mar-07 0:53

Seishin#

26-Mar-07 0:53

Hi!
I'm using a dataGridView (dgv) bound to dataSet through bindingSource.
one method (fired by button.click) fills the dataSet using dataAdapter.
the dgv displays loaded rows.
now what my goal is: when a row is displayed additional data for it is loaded in a background thread, and the row is refreshed (i'm using grid's overriden paint event to display the additional data) the reason for this is that I want to get and display the additional data only if the row is ever displayed, to avoid downloading (from sqldb) data that is not needed..

my current solution is:

<br />
public void GetPricesForRow(DataGridViewRow row) {<br />
if(backgroundThread != null)<br />
while(backgroundThread.ThreadState == System.Threading.ThreadState.Running)<br />
Thread.Sleep(3);<br />
<br />
backgroundThread = new Thread(new ThreadStart(delegate() {<br />
try {<br />
int colCt = row.DataGridView.Columns.Count;<br />
<br />
string[] vals = GetAdditionalData(row.Cells[1].Value.ToString().Trim());<br />
row.Cells[colCt - 2].Value = vals[0];<br />
row.Cells[colCt - 1].Value = vals[1];<br />
row.Refresh();<br />
} catch { }<br />
}));<br />
<br />
backgroundThread.Start();<br />
}<br />

row.Refresh(); fires:

<br />
public void Refresh() {<br />
this.DataGridView.InvalidateRow(this.Index);<br />
}	<br />

well it works.. but pretty slow.. when i set backgroundThread.IsBackground to true the row doesn't refresh (at least not always)

anybody knows a better solution?

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