Re: backgroundWorker1_ProgressChanged does not raise. - C# Discussion Boards

Re: backgroundWorker1_ProgressChanged does not raise.

Rocky#26-Dec-07 1:59

26-Dec-07 1:59

haveu added the event handler like this
backgroundWorker1.ProgressChanged+= new EventHandler(backgroundWorker1_ProgressChanged)

I think this could be the problem

Rocky

Success is a ladder which you can't climb with your hands in your pockets.

Re: backgroundWorker1_ProgressChanged does not raise.

hdv21226-Dec-07 2:00

hdv212

26-Dec-07 2:00

thanks
where i write your suggestion code ?

Re: backgroundWorker1_ProgressChanged does not raise.

Rocky#26-Dec-07 2:01

Rocky#

26-Dec-07 2:01

write it in the page_load method or the constructor

hope it helps

Rocky

Success is a ladder which you can't climb with your hands in your pockets.

Re: backgroundWorker1_ProgressChanged does not raise.

hdv21226-Dec-07 2:06

hdv212

26-Dec-07 2:06

thanks
i write your code in Form1_Load :
this.backgroundWorker1.ProgressChanged += new EventHandler(this.backgroundWorker1_ProgressChanged);
but the follwoing error has shown me :
No overload for 'backgroundWorker1_ProgressChanged' matches delegate 'System.EventHandler'

Re: backgroundWorker1_ProgressChanged does not raise.

Rocky#26-Dec-07 2:11

Rocky#

26-Dec-07 2:11

ok try doing it in this sequence

type
1) this.backgroundWorker1.ProgressChanged+=
2) then as soon as u press the = key you'll see a tooltip
3) press tab twice

Rocky

Success is a ladder which you can't climb with your hands in your pockets.

Re: backgroundWorker1_ProgressChanged does not raise.

Rocky#26-Dec-07 2:16

Rocky#

26-Dec-07 2:16

BackgroundWorker w = new BackgroundWorker();<br />
            w.ProgressChanged += new ProgressChangedEventHandler(w_ProgressChanged);

ok now I've checked it on my system.
that's the code

Rocky

Success is a ladder which you can't climb with your hands in your pockets.

Re: backgroundWorker1_ProgressChanged does not raise.

hdv21226-Dec-07 2:38

hdv212

26-Dec-07 2:38

thanks for reply
but my problem was not solved.
i call ProgressChanged event handler manually, and solve problem :

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)<br />
{                <br />
	int i = 0;<br />
	while (i < 1000)<br />
	{<br />
		//this.backgroundWorker1.ReportProgress(i);<br />
		this.backgroundWorker1_ProgressChanged(null, new ProgressChangedEventArgs(i,i));<br />
		i++;<br />
	}<br />
}

but why it does not raise ?
thanks

Re: backgroundWorker1_ProgressChanged does not raise.

Rocky#26-Dec-07 2:50

Rocky#

26-Dec-07 2:50

this.backgroundWorker1.ReportProgress(i);

you shuld be using this to report progress as this will raise the ProgressChanged event which will inturn invoke the method refered to by the delegate given at the top (when u did something like

w.ProgressChanged += new ProgressChangedEventHandler(w_ProgressChanged);
)

rest of the logic is upto u but tryin this

hdv212 wrote:
this.backgroundWorker1_ProgressChanged(null, new ProgressChangedEventArgs(i,i));

is simply meaningless

Rocky

Success is a ladder which you can't climb with your hands in your pockets.

Re: backgroundWorker1_ProgressChanged does not raise.

Judah Gabriel Himango26-Dec-07 5:24

Judah Gabriel Himango

26-Dec-07 5:24

Do you have ProgressChanged event handler setup, e.g. backgroundWorker1.ProgressChanged += .... ?

Another thing to remember is that ReportProgress will call your handler asynchronously; it won't block the background thread.

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problem with TopMost Property of forms ?

cmpeng3426-Dec-07 1:41

cmpeng34

26-Dec-07 1:41

hi all,
this may be a silly question but i'd like to know if there exists a solution or not.

the question is: i have 2 different applications (each contains just 1 form and both have their TopMost property set TRUE)

both work great (remain on top of all open applications) separately.

but if i start them one after another, the latter remains on top of all unless i don't click to the former on status bar.

i wonder if i am able to set priority between such forms ?
let's assume app1 and app2 and both have topmost property true.
but i'd like to have app1 that has higher priority than app2 or vice versa ?

thanks in advance.
bye.

MFA

Re: problem with TopMost Property of forms ?

Rocky#26-Dec-07 2:00

Rocky#

26-Dec-07 2:00

ohh jeez that's a difficult one mate Smile | :)

I think u can't set any priority but may be there's some guru out there who can do such a thing but to me it looks quite difficult if not impossible

Rocky

Success is a ladder which you can't climb with your hands in your pockets.

Re: problem with TopMost Property of forms ?

PIEBALDconsult26-Dec-07 8:01

PIEBALDconsult

26-Dec-07 8:01

Don't use TopMost, it's user hostile.

C# marquee control needed

Member 351000126-Dec-07 1:12

Member 3510001

26-Dec-07 1:12

Hi! I'm making a program in C# but have some trouble.
I want to use marquee control, but .Net doesn't provide marquee control.
I've searched for that, but I found some commercial controls or broken download link to free control - "Marquee Label .Net Component 1.0" by Ning Zhao.

Is there anyone who has "Marquee Label .Net Component 1.0" or something like that?
Thank you for any help.

Re: C# marquee control needed

Sun Rays26-Dec-07 1:31

Sun Rays

26-Dec-07 1:31

Hi,
you can use marque in aspx page.
Its working fine, you will get red line (error underline) but it will work.

<marquee>Hello World!</marquee><br />

Thanks,
Sun Rays

To get something you must have to try once.

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Re: C# marquee control needed

N a v a n e e t h26-Dec-07 1:34

N a v a n e e t h

26-Dec-07 1:34

Sun Rays ou can use marque in aspx page.

Looks like OP is asking for windows applications.

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Re: C# marquee control needed

N a v a n e e t h26-Dec-07 1:34

N a v a n e e t h

26-Dec-07 1:34

Use a timer and move the label. It will look like a marquee.

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Re: C# marquee control needed

DannyAdler26-Dec-07 1:55

DannyAdler

26-Dec-07 1:55

Hi there,

Found this the other day:
http://www.codeproject.com/KB/miscctrl/csmarquee.aspx?df=100&forumid=14623&exp=0&select=424537[^]

Danny

Re: C# marquee control needed

Paul Conrad26-Dec-07 7:41

Paul Conrad

26-Dec-07 7:41

Just make a custom control to do it for you. Not that tough.

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Writing Objects into a Database

00carl0026-Dec-07 0:55

00carl00

26-Dec-07 0:55

Hi,
Im using C# and MS Access,
I was wondering if someone could tell me how to store an object of a class into the database, with an sql query.

My class is variable length so i cant separate its members into columns.

class Item
{
string name;
int id;
ArrayList values = new ArrayList();
}

Item i;

I need to sstore an object 'i' into the database.. can anyone help me?
I tried to find out a way to serialize, because i've done it before in php, just wondering if it can be done in that way in c#. If theres another way, do let me know about it..
Thanks,
Carl

Re: Writing Objects into a Database

Giorgi Dalakishvili26-Dec-07 1:18

Giorgi Dalakishvili

26-Dec-07 1:18

You can convert an instance of Item class to byte array and store it in database in blob field

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Re: Writing Objects into a Database

00carl003-Jan-08 0:48

00carl00

3-Jan-08 0:48

hi.. i tried to do this with th ebinary formatter, but it gives an error

Type 'Billing_Module.Bill' in Assembly 'Billing Module, Version=1.0.2924.30808, Culture=neutral, PublicKeyToken=null' is not marked as serializable.

MemoryStream fs = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();

formatter.Serialize(fs, (object)newBill);

fs.Close();

aConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+path);
string queryCommand= "insert into BillHistory values ("+newBill.billNumber.ToString()+","+fs.ToString()+")";

can someone help me?

Re: Writing Objects into a Database

Giorgi Dalakishvili3-Jan-08 2:50

Giorgi Dalakishvili

3-Jan-08 2:50

You can make your class serializable by applying Serializable[^] Attribute

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Regarding Sorting in DataGridView

Ram_Pcr26-Dec-07 0:08

Ram_Pcr

26-Dec-07 0:08

i want to sort the DataGridView...
i dont want to sort first row of the DataGridView.. i just want to sort only from the second row..
whenever i click the header the DataGridview should get sorted only from the second row, the first row should not get sorted

Context menu

Hum Dum25-Dec-07 23:54

Hum Dum

25-Dec-07 23:54

I created a system tray icon & attach Context menu to it,
Now on this i am opening some forms.

Suppose there is menu item "Open" & it opens a form,
now when form is opened & if user click again on "Open" it opens
again, i.e it doesnot focus the same opened one, instead open new instance.

So, How to rectify this.

what if i used mnuItem.checked property to solve the problem?

And plz tell me other ways to do this, if this is one Smile | :)

Thanks in advance to all.

Re: Context menu

N a v a n e e t h26-Dec-07 0:08

N a v a n e e t h

26-Dec-07 0:08

You need to keep the forms object somewhere, and check it's IsDisposed property before creating new Form instance. If it is not Disposed, use BringToFront() to give focus to that form. If it is disposed, create new instance and store it.

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