The function for getting the difference in days between two days is giving me a wrong answer here.What could i be doing wrong??? DateDiff(DateInterval.Day, CDate("28/1/2011"), CDate("31/1/2011"))
View 1 Replieshow do i get total no of days between two days which might include leap year
right now i'm getting the no of days by using DateDiff function in vb.net. but i reckon it is not precise. cos it is not validating leapyear.
I need this for 2 different changes.ON one form i got a week calendar, the other a month calendar.Was hoping to add 2 buttons previous & next.To scroll back in time x days, or x days forward.And similar for the months, but instead of days months.Can anybody give me a exaple or a method how to get this to work?Figured it could be done with a loop, but not sure anymore.
View 2 RepliesI've been trying many ways to calculate the round number of days between two dates, I mean, counting the whole days. An example of what I need:
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How do I calculate the difference between two dates to display as a number in days?I have 2 text boxes (txtHStart_Date & txtHEnd_Date) I have used an Ajax Calendar Extender to enter the dates in each of these text boxes.I would like to get the difference between these two dates to show in a seperate text box (txtNoOfDays)
I've seen the timespan function but can seem to get this to work. I'm not to sure how to declare the text boxes as the dates I would the calculation to be made from
Code:
Dim D1 As Date
Dim D2 As Date
Dim ts As New TimeSpan
D1 = txtHStart_Date.Text
D2 = txtHEnd_Date.Text
ts = D2 - D1
But I know this isn't right. I also don't know how to get it to display in the 3rd TextBox.
Get the current number of usage days, unique usage days, etc in an evaluation license using CryptoLicensing Generator.
View 1 Repliesconvert days to months and days?
Normal 0
false
false
falseEN-US
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I have a date in the future e.g. 13/10/2008 I need to subtract the current date (today is the 28/09/2010) minus 7 days, so thats 21/09/2010 minus 13/10/2008, which would equal erm, 720 something ? But the current date won't always be 28/09/2010, obviously. I need the code for this. EDIT: When i said future I mean past :)
View 3 RepliesDateDiff for the interval Day gives expected results for days past until present, but if the first date is further in time than the second date, it gives the difference +1. Is there something I'm doing wrong? For example, if I put in today for both, the difference is 0. If I put in yesterday and today, I get 1. This is all expected, but if I put in tomorrow and today, I get 0, and two days from now and today give -1. Why is the function giving altered results if the date is negative?
Here is the specific code.
Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged
TextBox1.Text = DateDiff(DateInterval.Day, DateTimePicker1.Value, Date.Now)
End Sub
i want a function to calculate days number between 2 dates
for example :
start date = 2011/11/13
end date = 2012/01/02
i want months to be 30 days always .
thats mean
18 days in November
30 days in December
2 days in January
sum = 50 days
This is my first time writeing a program and i am stuck. i am just looking for were i should go next. i can't figure out how to write in code for the days in the getDay function.
Write a program that computes the cost of a long-distance call. The cost of the call is determined according to the following rate schedule:
a. Any call started between 7:00 A.M. and 9:00 P.M., Monday through Friday, is billed at a rate of $0.30 per minute.
b. Any call started before 7:00 A.M. or after 9:00 P.M., Monday through Friday, is billed at a rate of $0.15 per minute.
c. Any call started on a Saturday or Sunday is billed at a rate of $0.10 per minute.
The inputs will consist of (1) the day of the week, (2) the start/end time of the call, and (3) the length of the call in minutes. The output will be the cost of the call. Input will come from the user and outputs will be displayed via the console window.
Module program1
Sub Main()
Dim day As String
day = GetDay()
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Lets say every 7 days you manually kick off a VB.net program that moves all old files to an archive zipped folder; and you run this same code every 7 days BUT at some point in time you need to go into that zipped folder and delete every file that is 100 days old........What would you suggest I add to the code I have now, that would automatically un-zip the file (I assume I do need to unzip it first) then do the delete of the files that are 100 days old or older? I am thinking I need to set a timmer or somthing to trigger in 100 days from now then reset it once it is triggered; am I on the right track here???
View 8 RepliesThe date is actually a string being read in from a text file in the format
MM/dd/yyyy
how can i add 7 days onto the date?
I try to get how many days there are between two datetimepickers, but get convert error no mater what i do.
View 2 RepliesThis Code allows you too countdown seconds and minutes but im not sure how to add hours or maybe even days to it,[code...]
View 7 RepliesMy calculation is total/no.of days *3
View 3 RepliesI learned how to use DirectCast over the last few days and it's really helped me. However, I have a similar issue, instead of textboxes I am looking at variables that are referenced in the class.To bring you all up to speed, I have four variables, a Boolean that dictates each of the 4 players I have playing my game. [code] I would assume it'd work similar to DirectCast but I am unsure. What I came up with caused errors: [code]
View 14 RepliesI'm getting the following error:
[ArgumentOutOfRangeException: Value to add was out of range.
Parameter name: value]
System.DateTime.Add(Double value, Int32 scale) +7657639
System.DateTime.AddDays (Double value) +19
...
The line from which this error originates has the following code:
expires = Now.AddDays(30)
It occurs irregularly and irreproducibly. The server date/time is correct and set to GMT. I've heard that it could be some curiosity to do with timezones, but that is speculative. It seems that we're some time from the year 10,000 yet, so I can't understand why adding thirty days to the current time could cause this! Culture settings perhaps?
im trying to make a program, basically its a time in time out, i can get the date from my database and its in three columns, the first one is the date work, next is the timein and the other one is the timeout. im trying to convert the timein and timeout into date which are string at first but i having a problem when the timeout is the next day of the actual datework for example one emplyee has datework of 1/1/2009 and he time in at 6:00PM i can convert it to date and it work be datework + " " +timein or 1/1/2009 18:00, but if i add one day to the datework so the time out is correct "1/2/2009 6:00" , it wont work T_T is there a problem in my codes? [code]
View 5 RepliesI am trying to add 7 days to an existing date. [code]...
how to add 7 days to the date. txtErrorSent.Text will be the current date set equal to duedate.
If I know that today is 236th day of the year, how can I get what date is for 236 + 10 = 246th day of the year?
View 3 Repliesi have a textbox that displays date in format,for eg:March,20,2008.Then i need to get total days n march in year 2008.
View 4 RepliesI have a datagrid in VB2008 currently set up with a column that has dates. I want to be able to calculate the number of calendar days of the Disp Date Column to today's date. Almost like the days360 formula in Excel. I cannot do it in Access as it is a linked data table and cannot do it in excel as the spreadsheet is being updated by the server throughout the day.
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there is any method for calculate days of a month?
View 4 RepliesHow can I calculate the values in a date. [code]
View 4 RepliesThe program operates a board and activates relays when the buttons are pressed, the code works fine and i have published it to use on a PC however, after about 2 days the port times out and it stops operating the port, am i missing any code such as close port anywhere.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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Basically i have a textfile that is loaded into a listbox..now i have to count the number of days in the listbox..
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In a textbox the text 1 Days, 8 hours, 45 minutesI want the outcome in minutes , how do i do that ?
View 7 RepliesI'm trying to get, as the title says, the number of days between 2 dates. TextBox8 is set to a parsed version of the current date. The user has to enter the other date into TextBox7.Then I try to use this function that i made. The code does not work, I get an exception. I have never made a function before so I don't really know much about them. I honestly don't even know if this is possible,
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I've got a really good idea for an application I want to develop and possibly try and sell online. There is one thing I have never done before, and that is disabling an application after 30 days. Let's say I want to let users try out the application for 30 days, and if they haven't bought it after that time, then the application disables itself.
Any possible ideas on how to implement something like this?