I'm using datediff to establish difference between two dates using datetimepicker.i.m nnot getting the right results. a one day difference returns a 0, a two day difference returns a 1 etc. the code I am using is posted below.
days = DateDiff(DateInterval.Day, dtpStart.Value(), dtpEnd.Value())
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].....
Anyone know how I can return 3.0790 given the two dates below using VB.NET 4?The code below returns a whole number 3... Dim datTim1 AsDate = #1/31/2005# Dim datTim2 AsDate = #2/29/2008# Dim YEARS AsDouble = DateDiff(DateInterval.Year, datTim1, datTim2) MessageBox.Show("Years: " & YEARS)
View 8 RepliesIs 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?
View 2 RepliesOne of the problems with datediff function is that even if the two dates are 31-12-2011 and 01-01-2012,it will show the difference as 1 year.How to overcome this problem?
View 17 RepliesI need to return the exact difference between two dates in the form of a string. If the dates are 01-FEB-2012 and 01-FEB-2014, the function should return "2 years" If the dates are 01-FEB-2012 and 01-MAR-2014, the function should return "25 months". If the difference is not in exact years or months, it should return the difference in days. I do not want to use DateDiff from the Visual Basic namespace so the code is portable to C#.
View 1 RepliesI am using visual basic 2008 and I am trying to create a form.
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I have an accounts program. My cash book shows data based on date picked from DateTimePicker. Cash book is not entered everyday. I want to make my datetimepicker so that based on dates found in the database, it changes colour or enable / disable some dates, for which cash book has been entered. How is it possible?
View 6 RepliesIs there anyway i can select multiple dates in a Date Time Picker in
View 1 RepliesI am working VB.NET 08 Access Database. I have Two "DateTimePicker" controls one is "StartDate" and one is "Enddate". Now I am selecting Startdate like May 1st OK. Now when I select Enddate control this calender shows only Equal or Greater than dates should be Enable. EndDate should be Always Greater than Equal Date. That's why when ever user selects the Enddate Before May 1st dates should be disable..
View 2 RepliesI 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.
View 1 RepliesI 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
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i have 2 datetimepicker and i need to get the difference of the two dates in two different way
1- Suppose that i have choosed 15/12/2009 and 20/12/2009 i need the result to be as below in order to record them in my database,
15/12/2009
16/12/2009
17/12/2009
18/12/2009
19/12/2009
20/12/2009
2- i need the different between 2 datetimepicker in days
1.I want to click the datetimepicker and textbox will display dates by dates,I want to know if I can do this. Example - textbox will display -> 2/10/2010,2/12/2010,2/25/2010.
2. Can I off the today default on the datetimepicker?
When entering a date in the text-part of a datetimepicker, one could find him in deadlocked situations in normal conditions, but even more if min/max dates are set.Explained by example: having format set to mm/dd/yyyy, having date set to 01/31/2010, wanting to change it to 02/28/2010.At this point the '02' for the month isn't accepted because the day is set to 31, not existing in month 02.
When min- or maxdates are set, the situations where fluid date-entering is even more difficult, are even more frequent.To keep some compatibllity, a new property named 'partialvalidation' which defaults to 'True' could make that when set to 'False' a date is only validating/validated when the control loses focus or any other event (EndCurrentEdit, ...).
I have a dateTimePicker and I set the maxdate to today's date Now when a user select the date after today's date it won't select it but it still be displayed. How can I remove them or disable them do the users can't even click on the date if it is after today's date
View 7 Repliesbeen a long time since i came to the forum. i use to program a lot in vb6 but its been a long time since i did it so im really rusty. now that im trying to get back to programming, im finding it a bit of a challenge in vb2008... i have this question, im using a datetimepicker control to select dates in a calendar. what im trying to do is disable the textbox in the datetimepicker so that the user can only use the drop down calendar to select the date and not enter the date manually! does any one knows how to disable the textbox in the datetimepicker but still be able to select a date from the calendar???
View 4 RepliesI was wondering if someone could help me. I have a database and i want to select all records between 2 dates.I use two datetimepickers and would like my datagrid to show only records between dates selected.
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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:
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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:
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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.
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
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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:
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How to customize a DateTimePicker to show dates in other calendars systems ?
View 2 RepliesIs it possible to disable the dates that appear before todays date in a dateTimePicker control?I want to put in some validation so that my users can only select days in the future...ie a future appointment date?
View 5 RepliesI am wanting to retrieve the current weeks dates from a DateTimePicker control.
Eg, if i select Tuesday July 5, 2011, i will return the following dates: Sun July 3 2011 right through to Sat 9 2011
I've got a form with following controls: Two Datetimepickers Two Buttons One TextBox One ComboBox The idea is adding and subtracting dates using Datetimepicker contols... I found codes for doing Dates Calculation but is'nt quit correct;for example: if i want to add 21years from today the result will be: sat 30 Aug 1930 The Adding Codes on comand button: Private Sub BTNadd_Click(ByVal sender As System.Object, ByVal e As
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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]
View 3 RepliesI 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.
View 22 RepliesI 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.
View 2 RepliesI 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
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