Counting Number Of Days From Date Column?
Mar 8, 2010
I have a datatable that stores information on employees. What i'm trying to do is use it to run a seniority list looping through the table using the current system date. The looping part i have no problem with, and the system date calculation also i know how to do. The problem call the date from the startDate column to do the calculation.
i have tried
dim sDate As date = "startdate"
but i get an error that it cannot be converted to date.
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Sep 28, 2010
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 :)
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May 31, 2010
I have an SQL database with a single table with several colunmns. I want to count how many times a certain number appears in one of the columns. E.g. I have the following:
A B C
8 4 6
0 9 3
1 4 6
4 7 1
I want to count the number of times 4 is used in column B. I have looked at using the following, but not sure if this is even the right approach:
Dim db as New MainTblDataSet
Dim BCount = Aggregate B In db.MainTbl Into Count(B.B = num)
where num=the number I am counting the instances of (4 in this case).
The hope is that BCount will equal 2, but it returns 0 every time.
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May 28, 2010
Is there a method or function that I can use to get the number of days between a start date and end date? I tried using Timespan, but I was noyt able to convert the value to a string. What I am doing is I have 3 text boxes. 1 with start date value user will set using a calendar. And another with end date set using a calendar.And the 3rd text box is being used to display that difference between the two dates.
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Apr 30, 2010
on my design i have a listbox, datetimePicker and a button. how do i pick a date like for example 14 feb 2010 from the datetimePicker and click the button, then the listbox showing how many days from 1st jan 2010? should be 45days.
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Mar 18, 2009
I am trying to filter the first column of a listview which holds date values. If the date is less than 21 days from today it deletes the row from the listview.
[Code]...
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Jan 29, 2012
I'm trying to count the days between two dates, excluding Saturdays and Sundays. I've written this code so far
Dim startDay As Integer
Dim endDay As Integer
Dim days As Integer
[code].....
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Jun 10, 2011
Counting days independent of system calander ?
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Jun 10, 2011
I want to add a feature to my trial version of the application. After first activation, I want to make it limited to 90 days. But I am concerned about user's changing the date of system hence deceiving my application. Is there any possibility to make it fool proof in a way that even if user takes the calender back, application expires after 90 days of first activation? First activation date has been saved in the database.
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Jan 25, 2010
Get the current number of usage days, unique usage days, etc in an evaluation license using CryptoLicensing Generator.
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Jun 8, 2011
I am Importing a Excelsheet(xls) in to my Application, but the date and Number column showing blank in dataset when comes to application. The values are there in Excel. Any other way to import the excel sheet to application, so that i should get all the values same as there in the excel sheet.
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Sep 4, 2010
Lets say i had a label with 9/6/2010 11:59:99 that was selected from the month calendar control, is there anyway to determine how many days are from the present days date to the selected end date?
so 9/4 to 9/6 = 2 days
The "2" days is the value im seeking
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Mar 4, 2009
I am traying to use the DateTimePicker to extract days diff from a date selected on DateTimePicker1 to a date selected on DateTimePicker2. I have no problem substracting the daydiff in numbers of days. The problem I have is that I need the DateTimePicker to tell me how many of those days are weekends (friday, saturday) and how many are weekdays.
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Oct 16, 2009
'search Male
Dim cmdTextName As String = "SELECT isnull(Count(Gender),0) as TotalMale FROM tblStudent WHERE (Gender = Male)"
Dim sqlcmdName As New SqlCommand(cmdTextName, New SqlConnection(GetConnection))
sqlcmdName.Connection.Open()
[code]....
Am trying to count the number of male in my table however when i try to run using this code it pops an error which is "invalid column name Male" what seems to be wrong with my statements?
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Sep 9, 2009
tell me how I count the number of times a specifc value appears in a column within a DataGridView?
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Oct 14, 2010
i want to use this code to display a date in a datepicker without counting the weekends.That is if i specify maybe 20 days from a date or 20 days from 01/01/2010(1st Janunary,2010) i should get 28/01/2010(28th Januanary,2010) not 21/01/2010(21st January,2010).
[Code]...
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May 13, 2011
The 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?
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May 28, 2009
How to count no of Words in A RichTextBox?
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May 27, 2010
i have a datagridview linked to a access DB that right now looks in the 5th column and counts the number of "c","o" (completed and open) but it gets the count from the entire data base. I am able to filter the ones for a certain day and view them on the grid but how to count the number of occurrences that are visible and not the ones that have been filtered out?
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Apr 30, 2009
I am using a tableadapter to connect my project to an MS database. I need a a function which counts the number of rows in the table for something which I am doing. I have sucessfully used the count function to count the number of rows for my other tables, but when I tried to reuse it for another table, it wouldn't work. I get an error...
An unhandled exception of type 'System.ArgumentException' occurred in System.Data.dllAdditional information: Input string was not in a correct format.Couldn't store <AH25> in ProductCode Column. Expected type is Int32.
and this is the code which I used
Dim record As Integer = TAProduct.GetData.Rows
Do Until record = TAProduct.GetData().Count
' other codes
loop
It only seems to work if the first column is an integer datatype, which is the case for my other tables, but the table which I am currently dealing with using a string datatype. Is there another way to count the number of rows without using SQL statements or can I adapt my existing code in some way?
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Nov 19, 2010
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?
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Feb 11, 2012
I have a DateTimePicker (dtBBDate) and a textbox(txtDBBDate) object in my form....but what i want when user change the date of dtBBDate my text box should show show the date 10 days minus from that selected date i.e. if user select 10 may text box should show me 1st may?
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Nov 12, 2011
I have put datagridview on form. I have add one column and 7 rows. Beginning four row contain value "PASS" respectively and last three rows contain value "Fail" respectively. I have to count total fail values in a column in CellEndEdit Event.
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Jun 21, 2012
i made a tool which detects arrow keys .When i click up it shows the word up in text box when i click down arrow it shows down word vice versia.
My problem is i want to count the number of times i clickd an arrow and want to save it in text doc with time and date
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Mar 27, 2012
I have a display system that I created in VS Studio 2005 that uses ini files for certain functions. Reading and writing to ini files is easy enough but what I just can't figure out is how to count the number of items under a particular ini section.
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May 29, 2009
i am trying to count up to a number and add each number to a combo box. so for instance, the string value = 7. i want the combobox to count up to 7 in single numbers starting with 1
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Nov 7, 2010
I'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,
[Code]...
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Feb 27, 2009
I want to get number of days in a month. Here is my requirement if I am selecting month name in a combobox then I am displaying days in another combobox.
Example :
If I am selecting JAN in one combobox then 1 to 31 numbered bind to another combobox.
If I am seleing FEB in a ombobox 1 to 28 numbers added to the combobox.
I want to do this in vb.net (windows application).
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Mar 17, 2011
In my project, i need to add days to a given date. but when adding the days it should not have saturdays and sundays.
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Jun 22, 2012
I need to calculate the end date given the number of business days (excluding weekend and holidays). All the examples I've seen so far return the number of business days between a start date and an end date.
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