Web Forms :: Preventing Double Booking In SQL Database?
Mar 21, 2011
I would like to create a module that is similar to the inventory system but not with a whole lot of bells and whistles. Basically, I have a jumper business and would like create a database to hold the items (jumper, pop-corn machine, etc.). I would like to have a calendar that when a user click on a date that he/she like to book my item only the available items display and not the one that is already booked. Pretty much to prevent the same item to get book by two different people on the same date. I also would like to create a form on the order page to have the booking information to go into the database.
I want to save multiple seats to status(booked) inside my database. In the table there are t1,t2,t3,etc... But i can only update one of the column. I am using label to store into string of array.
Code:
Dim forBook() As String = lblSelected.Text.Split(",") Dim i As Integer For i = 0 To forBook.Length - 1 cmd2.Connection = mycn mycn.Open() cmd2.CommandText = _
I have deveopmed i web site in ASP.NET and C# using Visual Studio 2008. I have a problem with performing button events twice. A user has a web page open. He click on a button (Save) and data is added to the database. He then presses F5 to update the page, and the button event is fired again adding more data to the database that should no be added. My question is how can I avoid this scenario?
my project is on online multiplex ticket booking system, In my system when a user selects a movie it will show timings of the show and according to selected time on which screen movie is available is shown. So i just want to know when user selects all the details as i mentioned, according to that seats available should be shown and when user books seats that user has to type in textbox ,available seats should be deducted. how to perform all calculation from database and coding for the same.
I have to adjust the existing travel booking form on www.lastminutejoy.de for all the 6 subpages which can be seen in the footer area (royal atlantis, aspendos beach...)
On a certain subpage, e.g. .../aspendosbeach.aspx, the visitor should be able tosearch ONLY everything related to aspendos beach. The style should be like this one: www.delphinpalace.de (on the left)
There you can see that you can search for "flight + hotel" (Flug + Hotel) and "hotel only" (Nur Hotel). As a result of the search, visitors should see the same style like the one you see on those subpages of lastminutejoy.de.
As you don't have to code from scratch but just have to do some adjustments for all 6 hotels this shouldnt take too long.
how this is achievable, not so much in the "build the whole project" as to how the reservation website gets quotes for all the flights from all the flight companies. I assume that in the website's code you have to use a webservice which will quote say website A, and get its ticket prices.
i want to make website where users can book tiket online. i want to make quickbook like [URL] in this webiste to make this quick book like to work. how to do this type of quick book methods for booking online.
As the title states, how can i stop two users from booking the same appointment time.
Example, two users logging, on there screen they can both see that a 1pm appointment is available. They both try to book themselves into that appointment time.
How can i stop this from happening and ensure only one user can book it, then refresh the screen to show the next available booking time to the other user.
Having a lot of problems getting to grips with the Kentico CMS, but I'm finally getting somewhere close. I'm using a normal portal engine and running Kentico 5.5 RC2 on a local installation. I currently have an events page which uses a repeater to display all of the events that are available on the system currently. I want to use a calendar to be able to filter the events in that repeater. How would I go about this?
Currently i am learning on create a website with appointment feature. The website i am doing basically a dental appointment web, which show the free slot of dentist on the website and enable patient to book appointment by schedule an appointment based on time and date given. I have done others thing such as register, login, report those however i have no idea on doing the appointment module. I am trying to learn easy way to create booking feature for dental website. Is that a tutorial on learning to do this or others way which i can easily learn it.
I'm using linq to sql,everything seems to be working fine except one thing,I'm showing any mapped float fields from my db tables as "Double?" instead of "Double", and when binding to a datagrid, any of those "Double?"fields don't show.If I iterate through the items and spit out the property,the float value is indeed there and properly returned.
I am relatively new to ASP.NET and have searched the Internet to find guidance in preventing caching of web pages (in the latest versions of IE, Firefox, Chrome and Safari). Based on my search, I found a lot of conflicting/confusing info. As best as I can tell, it appears that I need to add the following 3 lines to the <head> section of my .aspx files:
[Code]....
if the aforementioned lines are correct and if all 3 lines are necessary? I have tried using different combinations of the 3 lines, but I get conflicting results (i.e., sometimes the page is cached and sometimes it's not).
How can i prevent a user from entering the same data twice, i guess i need some validation in somewhere?For example:I add a name of a city, added successfully to the table.Try adding it again, click add and the program crashes.What type of coding do i need for this, some type of compare tool or something for the table?
I am expecting the RequiredFieldValidator control to prevent a postback when the textbox is filled in with an incorrect data and the button pressed. What happens is that the validator displays an error message but a postback is fired.
I'm just wondering what people use to stop user from click a submission button more than once thus creating many records. Does any one have any examples that take client-side validation into account. I have done much research on this but am yet to find a feasible solution.
I'm using an asp:ImageButton as a custom CheckBox. When the user clicks on it it shows a dotted rectangle briefly. My code-behind immediately switches the focus to the submit button, but how can I keep this rectangle from appearing while the user has the mouse button down?
I have an existing app that has a java based search utility - this search utility has a FILTERing mechanism. You can click a button to POSTBACK to the server and there, a new window is generated displaying "blah dee da".
So, click a button to filter the utility, click a button to postback and voila, you get your popup aspx.
Unfortunately, the old aspx loses STATE when on the round trip and refreshes itself too - i lose my filter.
How do I go about NOT losing my STATE ?
I understand that specifying the following in the FORM tag on the old ASPX: target="_blank"
takes the focus away from the old aspx and so, the STATE is not lost. However, when the popup generates, a brand new aspx is created along with the asps pop-up. So, I end up with 3 aspx forms!
We have a flash site which uses POST requests to commumicate with the database, via .NET pages. There is no login, it's an open system. Since we are communicating with POST data we are using Request.Form to get the data posted from the flash. My issue is that anyone who can view that post request, in firebug for example, can then set up a post request from another server and this is not good as some of the actions are sending emails etc. Is there any standard way of preventing a POST request from another server when using Flash > .NET combo?
I have one TextBox with RequiredFieldValidator control and LinkButton on my page.
May occur the following situation on this page:
I filled the texbox and clicked the linkbutton is make postback on the server - so all ok.When I not filled the textbox and clicked linkbutton it will show message "Please enter your first name." and no postback will happen but when I filled textbox and click linkbutton I got a PROBLEM : Message "Please enter your first name." goes away (correct), but it doesn't preventing posback.
We have a number of multi-line text fields on our pages for form submissions. On the backend of things, we have our stored procedures checking for html coding in those fields to help prevent sql injection. In some cases, someone that is completing the form without any malicious intent is copying and pasting from their word resume into our text fields and once they submit the page it fails because word uses html encoding for formatting and such. So is there a way to either prevent pasting in that way or maybe a way to submit the data to sql in plain text?
Just looking for the easiest solution so that the user doesnt have to do multiple things to submit their application. In order to get it to work for anyone having issues, is to have them copy and paste into "notepad" and then copy and paste from there to our form, which strips the html coding.
Before I begin, I would like to acknowledge that I might be using incorrect terms below due to my lack of experience.
I have a GridView bound to an ArrayList of Custom Objects. I have a button as part of each row, which when clicked, I delete the row from the Arraylist, and re DataBind() the GridView. While this deletes the Row, it causes the Page to be refreshed that takes the User back to the top of the Page.
E.g. If the User clicks on the button of a row at the bottom of the Page, after the deletion, the Page gets refreshed and the User is now taken to the top of the Page.
This is irritating especially in long lists i.e. GridView with many rows. (I don't want to use paging here.) Is there any way to avoid this, or mitigate this problem.
