C# - Date Comparison To Check If Last Date Has Passed?
Dec 16, 2011
I have a DB table with the following columns
PolicyNumber
NextPremiumDate
PremiumNumber
Example For each PolicyNumber i have 5 NextPremiumDates.I want to display the 1st NextPremiumDate which is easy ...but i want to show the next NextPremiumDate only after the last NextPremiumDate has passed...How do i check if the last date has passed?I mean if i have 5 dates in the table given above...how do i check if the 1st date has passed then show 2nd date ...if 2nd has passed show 3rd and so on.
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Apr 23, 2009
how can i make it like IF (todays date is passed a specific date) then basically what i need is to see if the date is passed a static date i set in the vb code.
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Oct 18, 2009
how can I create following thing with Visual basic?I would like my excel to check the date value in a cell and compare it to current date and if the value in the cell is older than 2 months compared to current date it would change the cell's colour.
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Aug 24, 2011
I have a code in vb, and I'm trying convert it to c#.
_nextContactDate.ToShortDateString > New Date(1900, 1, 1)
This is _nexContractDate declaration:
Private _nextContactDate As DateTime
Comapre datetime to string?
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Aug 26, 2011
I have a DataSet where I need to filter the collection where one of the date columns is not null.
How do you term this in LINQ?
This is what I have so far but there is a compiler error on the w.CompletedDate field in the Where clause.
Dim completed = From ins In InspectionDataset.Inspection.AsEnumerable _
Where (Function(w) w.CompletedDate IsNot Nothing) _
Order By ins.Field(Of DateTime)("UpdatedDate")
I have also tried it the below way but the compiler will not allow the DBNull comparison.
Dim completed = From ins In Inspection.AsEnumerable _
Where ins.Field(Of DateTime)("CompletedDate") <> DBNull.Value _
Order By ins.Field(Of DateTime)("UpdatedDate")
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Mar 5, 2011
I am pulling a date value from my database:
Dim qfresho = From p In dbConfig.Configs _
Where p.Description = "FROD" _
Select p.dateValue
Dim qfreshc = From p In dbConfig.Configs _
Where p.Description = "FRCD" _
Select p.dateValue
Then comparing these date values to the current date:
[Code] .....
But for some reason its always returning the Else condition - even though the values in the database should make the query true. I'm guessing for some reason its not pulling the results as a date?
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Jul 17, 2011
I am trying to create a statement with my dataset that uses an underlying access table. There is a date column in one of the tables in the dataset/access db. Originally the date column within the datarow was set to 'nothing'.
[Code]...
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Feb 11, 2011
This has been driving me batty for the last while. I have an application that is passing up data to a SQL server table. Part of the data is dates. Because of settings on the SQL server the update will not accept the MM/dd/yyyy format. I have been trying for quite some time to get around this.
For some more information. Changing the update method or the server regional settings is not an option and I don't want to change my regional settings as this may not reflect the production server when this goes live.
Here is what I have tried so far
Code:
Dim dateEnd As Date = Date.MinValue
Dim dateStart As Date = Date.MinValue
If IsDate(Me.txtPostEnd.Text) Then
[Code]....
It works fine if the day is 12 or below because it still thinks that is the month. Is there a way to force the code to recogize that I want to use dd/MM/yyyy format or even dd/MMM/yyyy format?
This has to be done at thhe vb code side as the update to the SQL server is completed via a custom framework so I can't customize the SQL code to insert the data using a CONVERT
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Apr 8, 2010
Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
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Mar 13, 2009
I have noticed that hwen i set the datetime programmatically on the wpf datepicker the writing "show calendar" does not disappear but remains visible underneath the date passed?is there a way to solve this problem
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Jan 16, 2012
how I can ensure that conversion of a date to a string and a string to a date will give me the same date format.
For example:
Code:
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim d As Date = Date.Now
[code].....
I'm actually only interested in the date part as the label text shows so f is more than I want.But also, the day and month are reversed.
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Aug 12, 2011
i have 2 datetimepicker which are startdatedatetimepicker and enddatedatetimepicker.. the start date should not be more than end date..thus i need to check these two date.. here is my code...
[Code]...
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Sep 9, 2010
I have a date time as a string, eg. "2010-08-02", I'm trying to convert it to UTC with the following code snippet..DateTime.ParseExact("2010-08-02Z", "yyyy-MM-ddZ", CultureInfo.InvariantCulture)When I print to the console, I get the following: 8/1/2010 5:00:00 PM.Is there a reason why the date shows up as the date before the date I'm trying to parse? I could just add a day to this to advance to the original day.
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Mar 1, 2012
I have 2 SQL tables (A & B) with dates in the format DD/MM/YYYY and time, for example 01/03/2012 00:00:00. In my VB.net application I am looking to count the number of records in table A which have a date less than the one in table B. I have no problem getting the dates from the database. I have extracted the date in table B and stored this in the program. how to compare the dates within the SQL query.
In short what I am trying to do is:
"select count(records) as totalRecords from table A where date < " & dateBvariable & ""
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Oct 10, 2011
I have a txt file with a few settings that get loaded into the Program. These are put into an array. As the array holds different types (int, string, dates etc) its set to object type.
What i am trying to fingure out is how to check the date is a valid format, by returning a false value so i can have a msgbox pupup and say the date in the file is invalid. I cant use isdate() on the string from the file as even if the date format is correct its a string not a date type so i have to convert it first (which is the point it throws an error).
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Mar 22, 2011
I'm trying to find a VB code that checks if my date on a label is between a certain dateperiond that is chosen from two DateTimePickers..[code]...
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May 31, 2011
I would like to compare dates (not times) for 2 datetime variables. I get one of the dates from database as follows and comapre it with yesterday.How can I do it?
[Code]...
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Feb 21, 2011
I'm fairly new to ASP.NET & VB.I've been asked to take an existing textbox that is automatically filled with the current date and allow the user to either add a "+" or "-" and a number or a spcific number and convert that into a date.I underdstand the basic concept on how to do this, but I'm running into some problems using the proper commands in order for this to work.The Textbox is called txtDate.What I've tried to do is this:
If txtDate = '+' Or '-' Then
DateAdd("d", txtDate, today)
End If
Here is what the whole thing looks like:
Protected
Sub
DateEnter_Click(ByVal
sender As[code].....
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May 13, 2010
I have an access form that shows a data table. when the form is opened, I want to filter the data in the date column to show only the records that don't have a date entered into the field.
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Nov 21, 2011
I need a function that would return true if the date provided was a payday or date of next few weeks paydays.Paydays are every 14 days on a Friday (not twice a month).I tried several attempts, but don't have a clue where to start, except that the function needs a reference date to calculate from. [code]
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Jun 24, 2011
I am attempting to import data in a batch from an Excel Worksheet to a Sql Server database. Everything works except for the one date field in the spreadsheet. The date returned is off by four years from the value in the spreadsheet. Example: The Excel sheet has a date 10/24/2010 14:18, but when I look at the column in my query, the date is 10/23/2006 2:18. This pattern, 4 years and 1 day earlier, is repeated for every row in the worksheet.
The Excel column comes to me as a custom type, formatted m/d/yyyy h:mm. I receive this from an outside vendor and having them change the column is not going to be my simplest solution.
For what it's worth, the relevent part of the query is:
Select [Date Created] From MyWorksheet
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Mar 11, 2010
I am currently working on a custom data type, and wanted to implement a = operator.
I data type is a nullable date that returns a string value if date was supplied.
I want to allow the variable to be set like this
Dim nd as New NullableDate nd = Today Does anyone know how this can be done, or can anyone point me in the right direction?
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Jul 19, 2011
I'm trying the fetch only the date within the current and return how many rows Dim dc as new dataclassesdatacontext dim q=from p in dc.worktime where p.name.equals(session("name") and p.date ).count what I should I put after "p.date" ? And if I want to search for the record which there are record that are insert five days earlier, how to do that ? use (datetime.now - 5) ?
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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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Mar 6, 2009
I'm trying to write a 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 what I've got so far:
Code:
Public Class Form1
Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub
[code]....
That's what it looks like so far. I was wondering how you can automate the top label so it automatically comes up with the date when the program is run.Plus, I need to know how to display the dates difference (how many days have elapsed between the system date and the user's chosen date) in the bottom label.
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Jun 1, 2012
I am working on an application which uploads data from excel sheets into sql server database. The application will accept dates only if they are in mm/dd/yyyy format. It should reject all dates otherwise.
Now i am struggling to check its format. Here is my code.
Dim ROHSDate As String
ROHSDate = Trim(filterString(holdingTank))
...
here i need to check if it is in mm/dd/yyyy format
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May 7, 2009
Is there any way to check date and hour without using two Timers?
Right now i have this for the date:
Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Timer1.Stop()
[Code]....
PS (again): I thought about setting the Timer1 interval to 60000miliseconds, so that it would check the time everysingle step of the way (or maybe 10 minutes...), but I don't want the app to lag, so... How can i implement a Background Worker?
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Jun 24, 2009
I need to check my field in format ddMMyyyy(ex 12/03/1990) whether in interval of two dates that user picks from two date picker controls. Two date pickers are in custom format dd/MM. It does not matter for me if its between particular years. I need just to know if given Birthday belongs to interval taken from screen. Each datepicker gives values dd/mm/yyyy. I do not know how to check it. For example: Given date 12/03/1990 . User select two values from screen: From 01/01/1950 Upto 30/04/1949(or 1990, or 2000) Result should be True.Because 12 march is between 01 Januar and 30 April.
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Jun 24, 2009
I need to check my field in format ddMMyyyy(ex 12/03/1990) whether in interval of two dates that user picks from two date picker controls. Two date pickers are in custom format dd/MM. It does not matter for me if its between particular years. I need just to know if given Birthday belongs to interval taken from screen. Each datepicker gives
values dd/mm/yyyy. I do not know how to check it. For example:Given date 12/03/1990 . User select two values from screen: From 01/01/1950 Upto 30/04/1949(or 1990, or 2000) Result should be True.Because 12 march is between 01 Januar and 30 April.
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Mar 24, 2011
I am working on a business related program, so I need to know if system date is correct -synced- with remote server. How do you do that in vb .NET winforms?
P.S: In addition, is there any way to raise some event when system clock changed to prevent hacks? I don't want users to change local date after logging in their account.
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