DateDiff - Put Together A Booking System
Aug 22, 2010
I am trying to put together a booking system. I have managed to program rates, discounts etc., and am now onto calculating the nights for the stay. On my form I have two datetimepickers, and a button. The code I have entered is: (I am using Visual Basic 2008 Express)
CODE:
This works well when getting how many nights between two dates in the same month, but if I enter say 30th August to 2th September, I get a -28. Is there a way to get the number of nights booked between two different months?
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Jun 22, 2010
I have created a hotel booking system programme. However, I am puzzled as to how when the booking button is clicked it can search a database and find the best suited room (RoomType) and make sure that it is available (Date of Departure < system.date).
This data is held in two tables (Access):
Booking:
BookingID (Primary Key)
CustomerID (Foreign Key, Table:Customer)
Date of Arrival (Date)
Date of Departure (Date)
RoomID (Foreign Key,Table:Room) Room:
RoomID (Primary Key)
RoomType (Text)
RoomPrice (Currency)
Floor (Number)
This has all got to be done within a single button click. Any ideas as to how I can place this into my vb code?
I have a rough query for picking a room that is best suited:
Code:
SELECT roomID
FROM Room INNER JOIN Booking ON Room.RoomID = Booking.RoomID
WHERE Room.[Room Type] LIKE '" & Room_TypeTextbox.Text & "'"
AND Booking.[Date of Departure] < Now()
I have been trying for a while to get it to select a single matching record as there is a high chance that this query will return multiple records but im unsure on how to deal with that.
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Mar 1, 2011
I want to develop a system for booking cars for example. Suppose that one customer wants to book a car and this is the last one.Another customer searches with the same criteria and is finding this car too. How I am able to stay away of this situation?I don't know if I explained well... Imagine when you book tickets. How they can 'lock' the last ticket (or maybe the one that someone is viewing it) and make it unavailable to customers that have browse the site after?I use C# and it's about a very simple web service.
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Aug 22, 2011
If a booking is present in database on 12/27/2011 at 5:00 pm for 2 hours and i try to make a new booking on 12/27/2011 between 5 to 7 pm then my code generates an error message. Even if i try to book at 4:00 pm for 2 hours it generates an error message as the 2nd hour will be overlapped here with already made booking from 5:00 to 7:00.
Now here comes the problem part. When day changes it doesn't generate error message i.e. IF a booking is there on 12/27/2011 at 11:00 pm for 3 hours then it should not allow new booking till 12/28/2011 2:00 am but when i try to book 12/28/2011 at 1:00 am it saves it in the database and doesn't generate an error message. I want an error message generated in such a case.
I am using two separate fields in database one for time and one for date. Both of them have DateTime datatype.
newtime refers to time on which i'm trying to make new booking addednewtime refers to time after adding the duration to time on which i'm trying to make new booking
[Code]...
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Oct 26, 2010
create website involving payments plus some data entry eg booking of some facilities with the main data kept at a LAN window system.
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Apr 16, 2011
I have created a Bus Booking Website [URL]. I want to share the bus booking form with other sites so that they use our services.How can do I this using vb.net?
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Oct 11, 2011
I am making a vb.net client application that works with a php based website where users can reserve a pc for themselves at a certain day and a certain time. I have made the application in such a way that upon logon, it queries the database and finds the person who booked pc at this time and compares the username to the person logged on. If it matches a welcome screen is showed with additional options. Else a window is shown which says "This PC is already booked. You will be logged of in 10 seconds".
The problem i am facing is, i have coded the close button to logoff since i dont want user to bypass this part, but yesterday i saw that if i close the app directly from taskbar (processes) it just closes.without logging him off.How can we code or is there anything we can do that, even if he closes the application through task bar there is still an instant log off?
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May 27, 2011
I am using Visual Basic 2010, I have Created A DataSet Called "GaryTPHDB. and from that, I have created A form Called "Booking Form" , And I have also created a "Daily Jobs Form" And on this DailyJobsForm there is a DataGridView1, and at the begining of the row I have inserted a button called "View Job" and when I click this Button I want to View the whole job in the Booking Form so a user can edit the booking.
And at the end of the DataGridView1 Row, I Have inserted Another Button called "Allocate" There Is also a ComboBox. that a user can select a driver and when a driver is selected. I want the user to click the Allocate Button to update the dataset/Database with the selected driver. then remove the row from the DataGridView1. the DataGridView1 should be refreshed each time a row is remove.
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Feb 11, 2011
Anybody know of an existing open-source booking systems in Sports Clubs or Leisure Facilities based on .NET?
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May 26, 2011
im writing a room booking application, and after i've entered all the details for a booking, which looks like this;
'Declare Variables
Dim sUser As String
Dim sRoom As String[code].....
and now the problem is, its not working , its all going through ok and im not getting any run time errors. But the booking details arent being shown in the main menu screen.
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Mar 15, 2012
I have a customer and booking data sets on my form. customer id is a foreign key in booking table .but when i click delete button. it gives me an error: The DELETE statement conflicted with the REFERENCE constraint "FK_Booking_Customer". The conflict occurred in database "photoshoot", table "dbo.Booking", column 'Cust_id'. The statement has been terminated. Its a one to many relation between customer and booking. one customer can make many bookings each booking will belong to only 1 customer.
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Jan 3, 2012
I'm trying to do a Datediff in VB.Net thats confusing me. Basically I'm trying to do the following. If DateDiff("D", Today(), rsData("Start")) > 0 Then This is working fine when comparing the value from SQL with todays date. I however need to convert this to check the current month and if it matches then return whatever I'm trying to show below.
[Code]...
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Feb 22, 2011
If DateDiff(DateInterval.Day, moDoBooking.m_CurrentDay, moDoBooking.m_BaseDay) _
> DateDiff(DateInterval.Day, DateAdd(DateInterval.Day, _
Convert.ToDouble(moDoBooking.oBooking.oFacility.ADAYS), moDoBooking.m_BaseDay), _
moDoBooking.m_BaseDay) Then
This condition won't satisfy with these values:
moDobooking.m_CurrentDay = 2/3/2011
moDobooking.m_BaseDay = 22/02/2011
moDoBooking.oBooking.oFacility.ADAYS = 1
You might say this is dead-easy but honestly it's late here and my head is not working at all! Could AnyOne tell me why is that?
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Jun 21, 2012
this code always return '0' i don't know why
Dim cur_month = DatePart(DateInterval.Month, Now).ToString()
Dim cur_date As String = "01/" + cur_month + "/" + (DatePart(DateInterval.Year, Now).ToString)
[Code]....
cnb_mnth is ComboBox for Month
txt_year is Text Box For Entering Year
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Jun 22, 2010
I have five text boxes & one button there in my form. I have written this code to get user`s current age. But problem is that I have to get user`s age with months.
My code to get age :
Private Sub Command1_Click()
BDate = Text1.Text & "-" & Text2.Text & "-" & Text3.Text
CurDate = Now
[Code].....
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Jan 15, 2011
I`m migrating access database to vb.net. I have employee database with a few DateTimePickers, textboxes, and comboboxes
In access I have formulas in textbox's control source like this, and it works:
txtDayCalculation=DateDiff("d",txtDateofHire, txtManualDate)txtYear=Int(txtDayCalculation/365)txtMonth=Int((txtDayCalculation-(txtYear*365))/30) txtDay=((txtDayCalculation-txtYear*365))-(txtMonth*30).
So, I have trying to do also in vb.net, but NOT successfull. Maybe my aproach to write a code is wrong. Anyway, I have write like this:
me.txtDayCalculation.text = DateDiff("d",txtDateOfHireDateTimePicker, txtManualDateDateTimePicker)me.txtDayCalculation.text = DateDiff("d",txtDateOfHireDateTimePicker, txtManualDateDateTimePicker)
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Feb 7, 2010
In my office we were using VB.net 2003 and MS SQL server 2000. Now we bought a license for vb.net 2008 and MS Sql Server 2005. I migrated our application to vb.net 2008..Now the code compiles without any problem, but when i run a report, it shows error. System. Data. Sql Client.SqlException : 'DateInterval.Day' is not recognized datediff option.It was working fine in 2003. [code]
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Oct 6, 2011
I'm trying to fill a label with a datediff 'minute' value.. but when the minutes value is < 10
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Oct 5, 2010
How can we handle the case where one date is blank in DateDiff method? Example:
DateDiff(DateInterval.Day, CType(txt61_2.Text, Date), CType(txt21_2.Text, Date))
In above statement fields txt61_2.Textor txt21_2.Text may be empty then take it has 0
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Nov 17, 2009
I am writing some code that is trying to determine how far through a season we are in a game we play.
[Code]....
The code below, sort of works:
[Code]....
which could be any day of the week. I've tried all sorts of things to programmatically set "FirstDayOfWeek.x", but it seems as though vb.NET wants it hard coded as FirstDayOfWeek.Monday or. Tuesday etc and you can't pass an integer like 1 or 2 so I could set it on the fly.
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Jul 11, 2011
I am using the following code in my project. I want to find the number of days by given the last date and now.[code] for example, when BorrowDate is "01/Jul/2011" then the result is 7 days which it should be 10 to now.
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Jun 21, 2010
i have a problem on my DateDiff result. For example the result is 3.5, it will only show 3. How can i control that?
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Apr 15, 2010
i am using Visual Studio 2008 and VB.NET 2008 and SQL Server 2005 as the database. I just finished designing & writing codes for a customer information and , however after it has been connected to the database only one of the datetimepicker can be click, and the rest of the function including in the form are not working!it seem that the form stuck and NOT responding. i cant even close the form (X button), so i have to stop the process using compiler (visual studio 2008), however if i press the 'Delete' button before the 'Add' button, it will successfully delete the data.. but if i disconnected the form from the database, (disabled the form_load codes [put 'quote']) the both of datetimepicker will work and able to view the date interval (after pressing the 'Calculate Period' button) in addition how to make it appear automatically in screen without using the button? below are the code, I try to make some other form.. but it is still the same
Code:
Imports System.Data.SqlClient
Imports System
Imports System.Data[code].....
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Jan 29, 2004
I am using the folowing code to calculate the difference between two dates. intDaysInDev = DateDiff(DateInterval.Day, calManuDt.SelectedDate, calLaunchDt.SelectedDate) I've now been told that the calculation should not include weekends.
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Jun 19, 2010
Is it possible to use DateDiff to find the difference between time?I have two time periods i.e. 05:00 and 05:10pm so i would like to run some code if the time is between the two specified periods. Ive searched around and i think DateDiff could do this but unsure?
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Dec 21, 2011
I had some trouble specifying Monday as the first day of week in the DateDiff function.
The following syntax does not work: Dim myWeekNumber as Int32 = DateDiff("ww",date1,date2,2)
Compiler Error Message: BC30519: Overload resolution failed because no accessible 'DateDiff' can be called without a narrowing conversion
However, using the enumeration value (FirstDayOfWeek.Monday) instead of the value (2) does work. I wonder why.
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Apr 10, 2011
I tested every example I found but it doens't work in vb 2010 express... Do I need to install anything moor to make it work?
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Jul 7, 2010
I need to calculate the number of weeks between 2 dates. This will be used in a billing system.
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May 9, 2011
I have a query to retrieve DateDiff in my SQL:
SELECT Convert(char,DATEDIFF(m, Temp.Opening_Date, '2011-05-01')) As MonthDifference From Temp
It was successfully retrieve the data from SQL Server. But when I bind it to my vb.net datatable, the value is null. It's seems like vb.net datatable doesn't support datatype from DateDiff... What can I do?
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May 16, 2010
I know I can import Microsoft.Visualbasic and just use the ones I used in vb6. But I don't want to ;)In vb6 DateDiff("d", dte1, dte2) would just give me the number of days between the 2 dates and it didn't matter which order I put the 2 dates, it would still return x days.In .Net i have Date.Compare(dte1, dte2) but I have to know which date is newer other wise I get a negative result because I subtracted a bigger from the smallerIs there no .NET way to just get the difference without having to subtract then multiply by -1 if its less than 0?ALSO,In vb6 I could use Weekday function to get what day of the week a date is and use it in the DateAdd function to find the first day of the week's date. Like so: dim firstday as date = DateAdd("d", (Weekday(today, vbWednesday) - 1) * -1, today) would like a .Net way to find the date of the first day of the week, giving that our week might not start on sunday or even monday. I need to pass a date and the weekstart day (wednesday) and have it return the date for the wednesday. Like this:dim firstday as date = GetFirstDay(Today, Firstday.Wednesday)so if the date i passed was "9/3/10" which is a friday, the function would return "9/1/10" which is the date my week started on.
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