C# Discussion Boards - CodeProject

Re: txt1_textchange()

Laxmi R12-Jun-07 3:01

Laxmi R

12-Jun-07 3:01

okey bye

see u tom.

Laxmi

laxmi

Re: txt1_textchange()

Sylvester george12-Jun-07 19:13

Sylvester george

12-Jun-07 19:13

Change the properties of AutoPoatback = true

Then double click on textbox in design mode
you will get

protected void TextBox1_TextChanged(object sender, EventArgs e)<br />
{<br />
//Write your code here<br />
}

Regards,
Sylvester G
sylvester_g_m@yahoo.com

Re: txt1_textchange()

Laxmi R12-Jun-07 19:45

Laxmi R

12-Jun-07 19:45

Hi,

Thanks a lot.

laxmi

Re: txt1_textchange()

Laxmi R13-Jun-07 20:56

Laxmi R

13-Jun-07 20:56

Hi,

I did as it is. But I want when press tab in T1
(textbox1) it check database whether the given data
in T1 is exist or not? if exist it give message like
already exist and it again wait for data there (T1)
only. once we are giving data which is not in the
database, then it moves to next field.

according to your logic it checks database. not
only that if we press tab it gives msg. and it
comes to next field. again we come back to T1 and
press tab with out changes, this time it won't give
any msg also.

Please help me.

with Thanks

laxmi

Re: txt1_textchange()

Laxmi R13-Jun-07 20:57

Laxmi R

13-Jun-07 20:57

laxmi

Maximize Button

Ian Uy12-Jun-07 1:26

Ian Uy

12-Jun-07 1:26

Good Day Sir/Maam:

I have a very simple question thats been bugging me ever since.

Clicking on the maximize button, the FORM (Window) will maximize, but the objects on will not.

Say I have a text box and a command button. If I hit maximize, the form will maximize but the text box and command button will just stay as is.

Is there anyway that they will maximize proportionaly?

Regards,
Ian

Re: Maximize Button

Martin#12-Jun-07 1:33

Martin#

12-Jun-07 1:33

Hello,

You have to use the Anchor property of the controls.

All the best,

Martin

Re: Maximize Button

PandemoniumPasha12-Jun-07 1:34

PandemoniumPasha

12-Jun-07 1:34

hi,
this is due the the anchor property of the controls.
by default they are anchored to the top left of the form or the containing control. if you want to maintain the same size then you can set the anchor all the anchor properties of that control. or you can even use dock property.
just play around with these two properties and you will know what works best for you.

if you want, you can even create an event handler to handle the layout event which is fired when ever the layout of the control is changed.

hope this helps.

regards

Real-Time (?) updating of a file...

Shy Agam12-Jun-07 1:19

Shy Agam

12-Jun-07 1:19

Hello experts,

I'm using Serialization to store a collection, and retreive it from a file.
However, there are times in my application that a single item inside a collection should be written/read.

I'm currently marking my collection class, and all the items classes it stores with the Serializable attribute.
I'm using a BinaryFormatter and a FileStream to serialize it.

How can I update the file without writing the entire collection again and again?

Thanks in advance,
Shy.

Regularly checking up a folder

Hum Dum12-Jun-07 1:16

Hum Dum

12-Jun-07 1:16

I have to do a modification in our software,
see our software sends messages,

So, i want to modify like this, Suppose there is folder in which whenever a text file is being dumped then
software regularly checks that folder and when a file arrives it send to a particular address.

the file name is the destination address,

is there any way to do this?

plz help me. any similar code like this in any website then give me address, i want in c#, but if any other lang, then also no matter.

Re: Regularly checking up a folder

Giorgi Dalakishvili12-Jun-07 1:37

Giorgi Dalakishvili

12-Jun-07 1:37

Have a look at FileSystemWatcher class

my articles

Re: Regularly checking up a folder

Hum Dum12-Jun-07 18:44

Hum Dum

12-Jun-07 18:44

i saw ur articals but there is no article like filesystemwatcher?

Re: Regularly checking up a folder

Martin#12-Jun-07 19:31

Martin#

12-Jun-07 19:31

He doesn't meant to search in his articles.
The link is allways in his Signature.
Very confusing off corse.
Try searching on the CP articles[^]

Or msdn doc[^]

All the best,

Martin

drag in a certin position in a text box

merwa12-Jun-07 0:38

merwa

12-Jun-07 0:38

Hi all, I make a code to drag a text from a list to textbox but i want to insert it in a certin postion in the textbox how can i get the cursor position

merwa

Re: drag in a certin position in a text box

Martin#12-Jun-07 1:03

Martin#

12-Jun-07 1:03

Hello,

I think the SelectionStart property is what you are looking for.

All the best,

Martin

Re: drag in a certin position in a text box

Muammar©12-Jun-07 1:24

Muammar©

12-Jun-07 1:24

Hello merwa,
Martin is right, the mouse position has nothing to do with what you're trying to do, however if you're sure you want to get the mouse position, use e.Location for e is an automatically created mouse event argument for your control "textbox int this case"

Smile: A curve that can set a lot of things straight!
(\ /)
(O.o)
(><)

enum question

akkram12-Jun-07 0:31

akkram

12-Jun-07 0:31

Hi, is there a way to use an enum as condition in an if statement. Say for example can I change the following code and use enum instead /thx:

string houseType = string.Empty; //is set to different housetypes

...
...

if(housType.Equals("detached house"))
..do something

else if(houseType.Equals("manor"))
..do something else

Re: enum question

Luc Pattyn12-Jun-07 0:37

Luc Pattyn

12-Jun-07 0:37

Sure:

enum HouseType {UNKNOWN, DETACHED, ... }


HouseType myHouse=HouseType.UNKNOWN;
...
if (myHouse==HouseType.DETACHED) ...
...

Now if you want enum values that are not valid identifiers, you need some special
trick, e.g. add Attributes to each enum value, and retrieve them using reflection.

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Re: enum question

akkram12-Jun-07 0:43

akkram

12-Jun-07 0:43

Many thx Luc Smile | :)

Re: enum question

DavidNohejl12-Jun-07 2:27

DavidNohejl

12-Jun-07 2:27

Or use static class, like

  class HouseType
  {
      HouseType(string){...}

      string desc;
      public string Description { get {return desc;}}
  }

  static class HouseTypes
  {
      static HouseTypes()
      {
        type1 = new HouseType("House of type1");
      }
      public HouseType Type1 { get {return type1}}
  }


...

if(myHouse.HouseType == HouseTypes.Type1)...

It should have better performance then using attributes but it consumes some extra memory.

"Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus
"Real men use mspaint for writing code and notepad for designing graphics." - Anna-Jayne Metcalfe

How to record the video from web camera

Exelioindia11-Jun-07 23:53

Exelioindia

11-Jun-07 23:53

Hi all,

Can any one suggest/guide me how to record and store the video captured by the system web camera. I want to record the video which captured by my web camera and want to store it in my local hard disk. I want to do this using c# as an desktop application.

I got some ssamples to capture the video only, but i need ideas how to store the videos.

Plz any one suggest me how to do it.

Thanks in advance

Know is Drop, Unknown is Ocean

Re: How to record the video from web camera

Thomas Stockwell12-Jun-07 3:10

Thomas Stockwell

12-Jun-07 3:10

For specific web cams you will have to look to see if their is an API command library that you can use. Or you can do a search on this site for: web cam. You will get many results, one being http://www.codeproject.com/cs/media/motion_detection_wc.asp[^]. Their is another example of a webcam article that I like better, but the search didn't come up with it.

Regards,
Thomas Stockwell

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.

Visit my homepage Oracle Studios[^]

Re: How to record the video from web camera

Exelioindia12-Jun-07 3:54

Exelioindia

12-Jun-07 3:54

Thanks for your reply. I will have an look on your suggestions. Thank you once again

Know is Drop, Unknown is Ocean

How can simulate button clicking in multiple threads environment？

gzcjun11-Jun-07 23:39

gzcjun

11-Jun-07 23:39

I'm trying to simulating a button containing in a form.By reading some reference articles,I'd seen that most of them suggested to use webbrowser control,and then acquire htmldocument2 dispatch to get IHTMLInputButtonElement interface.But I'm now doing real time system,it demanded to get infos as soon as possibly,so I must use multiple threads to solve it.From some articles,I heard that webbrowser control cannot be used in multiple threads environment.So what's the better way?

Clarification On Static Member [modified]

Rahul8311-Jun-07 23:22

Rahul83

11-Jun-07 23:22

Hi friends..plz go through this pseudo code

I Included Requirid Namespaces
Dataset ds;--------------------------------------1
//static Dataset ds;-----------------------------2

protected void page_load(parameters)
{
ds = function in Data acesss Layer which retrives records from database and returns dataset.
populatedatagrid();

}

void populatedatagrid()
{
if(mydropdownlist.selectedIndex=0)
datagrid1.datasource=ds;
else
{
datagrid1.Datasource= here I performed filtering action using Row Filter Property and selected Index Value
}
}

void mydropdownlist_selectedIndexchanged(parameters)
{
populatedatagrid();
}

I am designing a web page where by default all records will displayed.but by selecting from dropdownlist I can filter the records.Later I thought its not right to perform the fuctionalities of the page_load event at each postback(unnecessry making connection to the database)..so i used Page.Ispostback to avoid that..so first time it worked fine but when i selected from dropdwn list it throws an error "object reference not set to an instance of object"..
reason for above error i understood(because in page load event i am returning dataset which does not happened at page post back)..so one of my friend commented the line no-1 and uncommented the line no-2 in above code..thus made dataset static..and it works

What I am not understanding is why making the dataset static solved the task..though HTTP is static?Is making dataset ststic makes the records to be saved at server?

Warm Regards,
Rahul Agarwal

-- modified at 7:28 Tuesday 12th June, 2007

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