Calculating Date Difference With Timespan And Future Dates?
Nov 12, 2010
I am trying to flag rows in a grid in the following order based on a date column
When 2 or more days old from today
then RED
When 1 day old then YELLOW
When 0 days old then GREEN
When the date is in the future then
BLUE
I have the following which is working fine except for the future dates which are GREEN instead of BLUE.
Dim myDate As DateTime = CType(grdSummaryView.GetRowCellValue(e.RowHandle, "myDate"), DateTime)
Select Case Now.Subtract(myDate).Days
'2 or more days old then RED FLAG
Case Is >= 2
[code]....
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Aug 10, 2010
I am teaching myself VB while creating a basic application I can use at work. Is there something in VB that will calculate a past and future date from a specific date. For instance, an Election Date falls on November 2, 2011. Once this election date is entered I want the program to calculate the reporting dates. The first report due is due exactly 32 days prior to the election. The 30 day post is due 30 days after the election.
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Mar 14, 2011
I want to be able to calculate the difference between two dates, written in SQL db. The difference must be in days/hours format. This is my code:
[Code]...
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Jul 29, 2011
I have a form where a user can choose an election date. One of the most frequent errors users make is entering the incorrect due dates of reports. Therefore, I am attempting to generate the report due dates in the application using the report guidelines. For instance, reports are due 32 and 15 days prior to the election and 30 and 60 days after an election.
I know the following won't work but you get the jest of what I am attempting to do. I am assuming I will need to break down the month, day and year somehow before I subtract or add the days to the date to get the actual report date.
[code]...
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Oct 12, 2009
In VB2005 I am trying to calculate the number of business days between two dates. I must also account for U.S. holidays (New Year's Day, Martin Luther King Day, Memorial Day, Independence Day, Labor Day, Veterans Day, Thanksgiving Day/Friday after, Christmas Day). If a holiday falls on a Saturday, then the prior day (Friday) is assumed to be a holiday. Likewise, if the holiday falls on a Sunday then the following day (Monday) is assumed to be a holiday.
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Jan 12, 2011
Say the user specifies these two dates....
Start Date: 2010-12-05
End Date: 2011-01-15
If I select December 2010 I should get the folllowing
startdate = 2010-12-05
enddate = 2010-12-31
Select January 2011 then
startdate = 2011-01-01
enddate = 2011-01-15
Should I subtract dates? How can I get the start and enddate for the current month/year based on the overall start and end date.I'm coding in vb.net.
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Mar 14, 2011
how to disable the datetimepicker dates in the future and also all the weekend dates but i am unable to find any! Only thing i can find is ASP.net code.
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Jul 14, 2010
I have the following VB.NET Code:
Dim Date1 As New DateTime(2010,5,6)
Dim Date2 As New DateTime(2009,10,12)
Dim NumOfMonths = 0 ' This is where I am stumped
What I am trying to do is find out how many months are between the 2 dates.
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Aug 31, 2009
I want to validate textbox so that it will accept only future date. Can I have regular expression for the same.
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Dec 28, 2011
I have a dataset which includes some numbers, I want to calculate the sum of the difference in the numbers how do I do this? For example my dataset looks like this:
[Code]...
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Oct 5, 2011
I'm using the ASP.Net Membership system but I'm having an issue with the LastActivityDate for the users in the database. For some users, their last activity date is in the future...
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Feb 23, 2012
I need to have the Calendar Control start 36 hours after the current date. How would I do that?
I have a form that requires that the future date has to be at least 36 hours from the current date in the order for the workers involved to be able to complete the task.
check values and keep the form from processing:
Protected Sub calPickupDate_SelectionChanged(sender As Object, e As System.EventArgs) Handles calPickupDate.SelectionChanged
If calPickupDate.SelectedDate < Today.AddHours(36) Then
[Code]....
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Nov 24, 2009
I made a programme through which I get a feed back clicking a button for a future warning date. I am giving the code below so that you can givthe problem is, I have to take 12 DateTimePicker to do that job in a single form which is creating a saving problem means when I click save button it takes long time to save. Now, I thought If I can do it by using TextBoxn a date format would easeup my save problem. Or it can be MaskedTextBox as well. Below is my code if any one can give me the solution.
Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If DateTime.Now > DateTimePicker1.Value.AddYears(1).AddDays(1) Then
[code].....
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Oct 19, 2011
I am trying to calculate the difference between 2 times.
So far I have 4 labels.
Label1 = Current date and time.
Label2 = Contains the exact time that the application was last closed.
Label3 = Contains the exact time that the application was opened.
Label4 = I want this label to say how much time in seconds had elapsed between the application last being closed and the application being opened again, in other words the difference in seconds between label 2 and label 3.
Below is what I have done so far, but despite repeated efforts I can't seem to find a way of getting the time difference to show in label 4?
[Code]....
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May 1, 2010
I have a text box on a form. It is a masked text box that shows in the format XX/XX.It is used for the expiry date of a credit card.What I need to do is how to take a value like 08/11 which means August, 2011 and check that it is in the future.For example something like 08/09 would be last year and hence would be invalid.Is there any way to take this string and check?
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Aug 31, 2009
I have below code in vb.net.
[Code]...
I want to check at client end whether the entered date in text box is future date. I mean this textbox should allow future date only. code the above problem using jquery or vb.net
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Sep 23, 2009
Let just say I have an Integer like 10,000 (that's the VALUE in want to reach). So, I have another integer like 2500 (that's my current VALUE). Third I have another Integer about 350 PER HOUR. To reach 10,000 I need 7,500 (well I already have 2,500). How long must I wait to reach the 10,000 when the increase is about 350 a Hour. Okay, that's easy: 7,500 / 350 = 21,428571 Hours. BUT how can I convert this double to a timespan? Or how is it possible to add this double value to the current Date to get the Date + Time when I reach the Value?
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Feb 28, 2012
I am trying to find the difference between two dates. The first of the two dates can be changed and when it is changed, the difference between the original dates has to be retained. This means that I have to automatically change the second date to have the same difference in days as it did before, but with a new first date. [code]I have the value of the old date1(currDate) and the new date1 value(newDate). I need to get the difference between these, and then add or minus these days from the endDate.
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Jul 20, 2011
I have a sqlce database table that I am entering data every day.
Date No Meter_1 Meter_2 Meter_3
12-05-2010 1 1234 3456 4567
12-05-2010 2 3423 4567 0987
[code]....
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Feb 10, 2010
I need to take 6 user entered dates and compare them to a date pulled from a database & stored in a variable. If greater than 6 weeks, then some action needs to take place.When writing the code, I get the following message (before compilation). Value of type 'Date' cannot be converted to 'System.TimeSpan'. [code] Within my code the 'dt' in the line above is underlined with the error message appearing on mouseover. I have tried using CType, as in dt = CType(Session("dt_occurence"), DateTime) in the hopes that might work, but it doesn't do it.
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Feb 24, 2010
I'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:
[Code]...
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Jan 9, 2011
How to calculate the difference in months between two dates in C#? Is there is equivalent of VB's DateDiff() method in C#. I need to find difference in months between two dates that are years apart. The documentation says that I can use TimeSpan like:
[Code]...
but this gives me data in Days. I don't want to divide this number by 30 because not every month is 30 days and since the two operand values are quite apart from each other, I am afraid dividing by 30 might give me a wrong value.
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Dec 18, 2010
i have this function and i want it 2 calculate the difference between two dates and it is suposed to return the difference in days but it it just not working
[Code]....
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Feb 7, 2011
I am changing the row color of my gridview based on how many days the task is from today. But it is not working date1 is todays date and date2 is the due date of the task.also when i sort i click on the column headers to sort, the rows change colors..[code]
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Mar 12, 2012
I need a program which shows day and time difference between 2 dates.For example: The user chooses 2011/12/11 10:20:05 and 2010/12/11/ 10:40:35.Then the program shows the difference between them in days ,hours ,minutes and seconds.
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Jan 11, 2010
I try use datediff function to get month interval between 2 hijri dates but the function deals with the dates as Gregorian Dates so the result is not correct.
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Jun 19, 2009
I have two tables: a schedule table that contains information about how an employee is scheduled and a numbers table in which each number corresponds to a date.
[Code]...
I can do this on the SQL side or the code side. I have Linq at my disposal if I need it. The table doesn't need to be compiled by SQL. This will happen dynamically on a website and should be as efficient as possible.I don't want to have to iterate through each and look for breaks in contiguous days if I don't have to.
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Jan 13, 2010
why did they make this so hard to do. Does anyone have any clear cut, basic 3-4 lines of code that can tell me how to add 2 time variables together to create a 3rd variable? I tried this but on Time2 I get Value of type 'Date' cannot be converted to 'System.TimeSpan'.
[Code]...
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May 1, 2009
I need to calculate the difference between two days excluding weekends.
this code counts the difference between two days.
PHP
Public Class Form1
Dim date1 As Date
Dim date2 As Date
[Code]....
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Mar 6, 2009
I'm trying to make this program which compares the difference between any date in the past and the system date, showing how many days have elapsed since that date. This is the layout I've created so far, the two date boxes currently show the system date so even if I change the system date, both those boxes will adjust to show it as well. I want to try and make the system date a box without a drop down arrow and so you cannot edit the box at all. The box below is fine how it is as the user can enter any date they desire. And the text box at the bottom needs to show the difference between the system date and the inputted date.
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