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Hello ,
I am developing web application using asp.net.
I want to read barcode of book in asp.net via web cam.
If user attach web cam ,web cam is detected in my web application and read barcode (in my case it is ISBN number ) when user move book infront of webcam.
Thus in short i want soruce code to read barcode in asp.net
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Member 4009037 wrote: I want to read barcode of book in asp.net via web cam.
If user attach web cam ,web cam is detected in my web application and read barcode (in my case it is ISBN number ) when user move book infront of webcam.
Hmmm... 
Member 4009037 wrote: Thus in short i want soruce code to read barcode in asp.net
This is nothing to do with ASP.NET.
cheers,
Abhijit
CodeProject MVP
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Member 4009037 wrote: web cam is detected in my web application and read barcode
Hmmm, what is next....
- webcam to spy on who is in front of the monitor, you idiot, get up that was not the real you.
- webcam to spy on people keyboard. Hey I can watch as you type your password
- webcam to look around the house, hmmm, pretty house...
This is not fun, I want my web application to detect their speaker, so I can SHOUT my commands as I sneak through the webcam. 
Yusuf
Oh didn't you notice, analogous to square roots, they recently introduced rectangular, circular, and diamond roots to determine the size of the corresponding shapes when given the area. Luc Pattyn[^]
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Yusuf.A wrote: what is next....
- webcam to spy on who is in front of the monitor, you idiot, get up that was not the real you.
- webcam to spy on people keyboard. Hey I can watch as you type your password
- webcam to look around the house, hmmm, pretty house...
Excellent. ![Jig | [Dance]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/jig.gif)
cheers,
Abhijit
CodeProject MVP
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This can't be done with ASP.NET. ASP.NET cannot run a webcam. However, you can write an active X control to control a webcam. If you can read a barcode from that, is another question.
Christian Graus
Driven to the arms of OSX by Vista.
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i use application state to store the session data, after logging off i want to clear the session data relevant to the user , how can i do this, or is it clear by it self
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prasadbuddhika wrote: i use application state to store the session data
That's odd. What are you trying to achieve? You can clear application variables by calling Application.Clear() or Application.Remove(ItemToRemove)
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Hi,
i have created a user control in VS 2003. in user control it have 1 text box. in aspx page it have e user control with a button.
i try to read text from the user control, but it give error the textbox is null, even a have type text on it....
I can create user control in VS 2005, successfully but not in 2003. Can any one guide how to achieve it????
Advance thanks...
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You have not provided enough information to answer. How are you trying to read the values? What code are you using?
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user control file was -> editor.ascx
code in editor file
public string gettext
{
get
{
return TextBox1.Text;
}
set
{
TextBox1.Text = value;
}
}
in aspx file
//on button click events
editor edi = new editor();
label.text = edi.gettext;//to read the text
//on page load
editor edi = new editor();
edi.gettext = label.text;//to set the text
first of all i tried to read the value only from aspx page, i couldnt make it work
and then i try the above by set the value from aspx page, still it is not working.
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Hello there everybody!
I'm creating my own "web shop" using .NET ( + JS, AJAX, SQL, CSS ) but i'm not quite familiar with the "ASP.NET web development stategies" (actually i'm a software developer, but i'm familiar only with the "desktop standarts and some business logic"). In my free time i've read some "big ass books" about ASP.NET but i've some questions which i don't think any books examplain (at least some of them).
Can i please ask you for some help ? If you can spare some business logic or advice i would be very greatful! Now i'm gonna do something "not so standart for an ordinary thread". I'm gonna explain some of my business logic and i would like you to correct me if you see something wrong ( well .... if you want to ... i cant force you )
1) SQL, JS, AJAX, CSS
My experience has thought me that, the maximum logic exported in the SQL Server, the better. I'm quite familiar that stored procedures must be used for many reasons ( performance, security ) and so on. ( If you disagree , please correct me.) I dont have any questions here and none for the other technologies too ( JS should be used for client validation, some other operations which don't require server processing but are not dangerous ( for example you should not validate password on the client ) but maximum logic should be exported in the client and the SQL server, AJAX should be used for "partial updates of the page" and soooo on.
2) ASP.NET
My logic about:
1) Creating the web store was first to make a base form which has only the logos and backgrounds.
2) Create forms which inherit the base form and define the "cells that the controls are gonna aligned in"
Question 1: In Windows Forms when you want to put a control on your form (using the VS.NET form designer ) you simply drag and drop it from the toolbox and you edit it by positioning it, anchoring, setting other properties and so on. But i read in many articles that its NOT a good way to do that in web forms ( i'm talking especilly about the positioning ... ). However .... i actually never read a good way of doing so! What is the right way to position a control in yout web form? ( I saw video lessons in which they places a 1row, 1 column table on the form and inside it they palced the control. I really, really dont think thats right )
3) After the "second base forms inheriting the first base form" ( for example two forms .... two types). Than we create web controls needed ( i would personally store them in another assembly if i was developing a windows app. Question 2: is there a problem doing so in web apps, is it a good way? )
Question 3: There is a "logic" that i'm quite curious about. For example we have a search form in which by special criteria the records are listed. For example a query is executed and 1000 results are returned. Its natureal that only 20 records can be displayed and the other are calculated as "number of pages" ( 1,2,3 .... 50). When the user wants to click on page "3" is another query executed or are the results chached when the first query is executed ( in the current Session ) and the "page 3" displayed records taken from the chached data ?
I have one last question:
If i have defines access rights "administrator", "moderator", "user" the control ponals for each of this user types must be different ( or ... the administrator must have the admin + moder + user panels, the moderator must have the moder + user and the user can have only user panel ). That means that "the page must be different for each of this types".
There are two ways of doing this ( in my point of view ). First is to develope pages that inherit the base page, set "special access" ( authorization ) to those pages and implement the panels (and other logic). I really don't like that way.
The second is simply to generate different control panels based on the "special access" ( no pages are created for each type )
Is there another approach ? Please give me some advice.
I have many other questions , but the thread is going to become really big. I would like you to comment on the things so far
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Hristiyan wrote: I'm creating my own "web shop" using .NET ( + JS, AJAX, SQL, CSS )
It would be very helpful to learn the basics of HTML. While you can build web application with out knowing too much about it, but getting the basics will help a lot.
Hristiyan wrote: My experience has thought me that, the maximum logic exported in the SQL Server, the better
I agree. But you may also have some business logic that do not belong at the db layer. I like to create business logic layer and database layer.
Hristiyan wrote: AJAX should be used for "partial updates of the page" and soooo on.
you could do a whole lot more with AJAX than partial page updates.
Hristiyan wrote: .... i actually never read a good way of doing so! What is the right way to position a control in yout web form? ( I saw video lessons in which they places a 1row, 1 column table on the form and inside it they palced the control. I really, really dont think thats right )
Like I said, learning about HTML will help you clarify this sort of issues. you can use tables to position your controls. If you look into some of the web controls, like grid control, they get rendered as table.
Hristiyan wrote: Than we create web controls needed
what do you meant by this? There are a number of web controls provided to you out of the box. If none sasifies your need, you can create your own web control.
Hristiyan wrote: Question 3: There is a "logic" that i'm quite curious about. For example we have a search form in which by special criteria the records are listed. For example a query is executed and 1000 results are returned. Its natureal that only 20 records can be displayed and the other are calculated as "number of pages" ( 1,2,3 .... 50). When the user wants to click on page "3" is another query executed or are the results chached when the first query is executed ( in the current Session ) and the "page 3" displayed records taken from the chached data ?
Look at GridView. It can do all what you said. 
Hristiyan wrote: If i have defines access rights "administrator", "moderator", "user" the control ponals for each of this user types must be different ( or ... the administrator must have the admin + moder + user panels, the moderator must have the moder + user and the user can have only user panel ). That means that "the page must be different for each of this types".
There are two ways of doing this ( in my point of view ). First is to develope pages that inherit the base page, set "special access" ( authorization ) to those pages and implement the panels (and other logic). I really don't like that way.
The second is simply to generate different control panels based on the "special access" ( no pages are created for each type )
Is there another approach ? Please give me some advice.
Look at asp.net membership.
I think you are in a right track. you may want to pick good asp.net book and you will find most of your questions answered.
Yusuf
Oh didn't you notice, analogous to square roots, they recently introduced rectangular, circular, and diamond roots to determine the size of the corresponding shapes when given the area. Luc Pattyn[^]
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That you for your kind and quick response !
Yusuf.A wrote: It would be very helpful to learn the basics of HTML. While you can build web application with out knowing too much about it, but getting the basics will help a lot.
You are right. I actually went head first in the ASP.NET and the other technologies ( i'm actually in a hurry with that project ) and thought i would learn HTML on the way. But if the control alignment is an html issue then i have missed some serious logic. However, is positioning controls with tables the best way to achieve control positioning?
Yusuf.A wrote: I agree. But you may also have some business logic that do not belong at the db layer. I like to create business logic layer and database layer.
No, no .... i'm quite familiar with that . I perfectly agree with you on that matter. I've created similar framework for a CRM system.
Yusuf.A wrote: you could do a whole lot more with AJAX than partial page updates.
Agree with that too. I was just giving an example. My mistake.
Yusuf.A wrote: what do you meant by this? There are a number of web controls provided to you out of the box. If none sasifies your need, you can create your own web control.
Thank you for your advice. I'm gonna research about that control right away.
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Hristiyan wrote: However, is positioning controls with tables the best way to achieve control positioning?
You will hear people who swear by tables for layout and those who won't even come close to tables. The confusion arises from the HTML 4.01 specification. personally, I use tables to position my controls, and in most cases I don't see any problem using it.
Here this [^] article will explain it better. Hope it helps!
Yusuf
Oh didn't you notice, analogous to square roots, they recently introduced rectangular, circular, and diamond roots to determine the size of the corresponding shapes when given the area. Luc Pattyn[^]
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Yusuf.A wrote: You will hear people who swear by tables for layout
Not professional web developers I suspect.
Yusuf.A wrote: I use tables to position my controls, and in most cases I don't see any problem using it.
It buggers up many accessibility features. People with vision difficulties who use screen readers won't thank you. There are also Search Engine Optimisation implications (according to the SEO specialist in my office) that make tables a poor choice.
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Colin Angus Mackay wrote: Not professional web developers I suspect
Colin Angus Mackay wrote: Yusuf.A wrote:
I use tables to position my controls, and in most cases I don't see any problem using it.
It buggers up many accessibility features. People with vision difficulties who use screen readers won't thank you. There are also Search Engine Optimisation implications (according to the SEO specialist in my office) that make tables a poor choice.
Well, may be I should have put some disclaimer on my statement. I know and I agree with the HTML table you raised. But then it depends on who your target audience are. In my case, our application is targets to specific audience, for that this is not an issue.
Colin Angus Mackay wrote: It buggers up many accessibility features. People with vision difficulties who use screen readers won't thank you.
This is true, but how will these people use screen reader for DataGrid? we all use them pretty much in many pages. They get rendered as tables.
Colin Angus Mackay wrote: There are also Search Engine Optimisation implications (according to the SEO specialist in my office) that make tables a poor choice.
This is not an issue for us. We don't allow search engines to crawl our app, because there are many customer proprietary data we can not spill out there.
Yusuf
Oh didn't you notice, analogous to square roots, they recently introduced rectangular, circular, and diamond roots to determine the size of the corresponding shapes when given the area. Luc Pattyn[^]
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Adding to that, browsers take more time to render the page if it is contained in a main table. Something like
<body>
<table id="main" >
...............
...............
...............
</table>
</body>Browser can render the main table only when it gets the ending node of it which is at the end of the page. This may make rendering slow if your page is big. But a page design with small tables (without wrapping in a main table) looks OK to me.
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Colin Angus Mackay wrote: Not professional web developers I suspect.
Could you please suggest another approach, a more "professional" one ?
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I am working on a website remotely using VS2005. When I change a file, I save my changes and then close the file in the editor. Once I compile, I get a message:
This file has been modified outside the source editor. Do you want to reload it?
The file is not open anywhere else and I am the only person working on it. Whether, I press ReLoad or the Ignore it causes weird behavior: For example, I have a break point set at the login screen but debugger skips the login screen and stops somewhere at another breakpoint.
If I close VS2005 then re-open the website all is fine and the debugger stops where it is supposed to. But this is very tedious because everytime I make a change I have to close VS and re open the website.
Why is this happening? I do not have the project open in multiple instances of VS or anywhere else
CodingYoshi
Visual Basic is for basic people, C# is for sharp people. Farid Tarin '07
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I am making a website and want to integrate a plagiarism software in .NET, can any one please tell me that where can i find or use plagiarism software for detection or any software with source code.
Thanks
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What do you want to detect, someone copying your website on another site, or someone copying your code ? If the former, use google, if the latter, I assume you are joking.
Christian Graus
Driven to the arms of OSX by Vista.
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sorry sir i forgot to mention that, i am making a website in which a research document can be uploaded and an online plagiarism application/software can check plagiarism with results for e.g(www.plagiarsimdetect.com). Can you please tell me that is there any application with source code or online services which can do that
thanks
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I have an ASP web application. with three asp:dropdownslists. The lists work fine in IE, but when on Firefox (v3.0.7), I can not gain focus on the control with the mouse. I can however tab onto the controls, and use the arrow keys to select focus. I can't get the list to "drop down" even when using the keyboard. Any one have any ideas?
Code For one of the drop downs is......
**********************************************************************************************************************
<asp:dropdownlist id="cmbRaceDates" runat="server" autopostback="True" xmlns:asp="#unknown">
VB Code
Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
getRaceDate()
End Sub
Private Sub getRaceDate()
Try
cmbRaceDates.Items.Clear()
cmbRaceDates.Items.Add("Please Select A Race Date")
While Reader.Read
cmbRaceDates.Items.Add(Value To Be Displayed)
End While
cmbRaceDates.Visible = True
Catch ex As Exception
System.Diagnostics.Debug.Write(ex.Message())
Finally
End Try
End If
End Sub
Protected Sub cmbRaceDates_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbRaceDates.SelectedIndexChanged
Do Stuff
end sub
**********************************************************************************************************************
Any Help would be greatly appreciated!
Ryan
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Have you tried removing the autopostback property ? Obviously, ASP.NET is generating HTML that FIrefox doesn't like.
Christian Graus
Driven to the arms of OSX by Vista.
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