I need help with a quick question I a string "07/10/2014" how can I get first the year "2014",second the month "10" ,third the day- "07" with out "/" only the values in VB.NET
Please show me the full way how to do it.
First declare it like this Dim x as Date = "07/10/2014". And to get the individual values use x.Day, x.Month and x.Year
Use the DateTime.Parse() method then use the return DateTime structure to extract the Month, Day, Year properties (similar to DJK's answer above).
If the thread's current culture is set to one that understands "mm/dd/yyyy" format, then the code can be as simple as:
Dim dt As DateTime = DateTime.Parse("07/15/2014")
MessageBox.Show(String.Format("Month: {0}; Day: {1}; Year: {2}", dt.Month, dt.Day, dt.Year))
Have a look at this.
Dim MyDate As Date
MyDate = "07/10/2014"
MsgBox(Format(MyDate, "dd")) ' dd gives you day number
MsgBox(Format(MyDate, "MM")) ' MM gives you month number
MsgBox(Format(MyDate, "YYYY")) ' YYYY gives you year number
The full list of date fomatting string could be found here (MSDN)
UPDATE
Use following example to assign to a string variable
Dim DayOfString As String DayOfString
DayOfString = Format(MyDate, "dd")
Related
The data that I have to convert is written as the separate variables "Month", "Day", and "Year".
The data I need to convert for example is:
Month is "July"
Day is "21"
Year is "2013"
Combine it and use DateTime.ParseExact with CultureInfo.InvariantCulture:
Dim dtStr = String.Format("{0} {1} {2}", month, day, year)
Dim dt = Date.ParseExact(dtStr, "MMMM dd yyyy", CultureInfo.InvariantCulture)
Also have a look at: http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx
If you don't know if the data is valid you should use DateTime.TryParseExact:
Dim dt As DateTime
If Date.TryParseExact(dtStr, "MMMM dd yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, dt) Then
Console.Write("Date is: " & dt.ToShortDateString())
End If
I would first put the date into a string so
Dim dateString as string = string.format({0} {1} {2}, day, month, year)
Where day, month, year reference the variables holding the date values.
Then try
Dim result as DateTime = Convert.ToDateTime(dateString)
I have 2 fields fromDate and toDate for a school's term. Say their values are '01-06-2013' to '01-09-2013'. How do I get the total number of days in the term, in vb.net?
You can try this in vb.net:
Dim t1 As DateTime = Convert.ToDateTime("01-06-2013")
Dim t2 As DateTime = Convert.ToDateTime("01-09-2013")
MessageBox.Show(t2.Subtract(t1).Days)
I think сlass DateDiff can help you: http://msdn.microsoft.com/ru-ru/library/ms189794.aspx
Try this (C#):
TimeSpan timespan = Convert.ToDateTime("01-09-2013").Subtract(Convert.ToDateTime("01-06-2013"));
Response.Write(timespan.Days+1);
Usually the Subtract method return a value that is one less than the correct value so added one to get excat no of days
OR:
DateDiff(DateInterval.Day , curDate, srDate) //can replace the first argument with "d"
Also check this link
I'm trying to convert a string into a date format
My string looks like this
Dim MyString as String = "June 2011"
And I'm trying to convert it like this
Convert.ToDateTime(MyString).ToString("MM yyyy")
But it's giving me the error
Syntax error converting datetime from
character string.
The desired output would be either 06/2011 or 01/06/2011. The value of my string will only ever have the month and year in though.
Any ideas?
A datetime object in .NET represents one single point in time. To create one from a Gregorian calendar date, you need all three parts (day, month, year), otherwise it can't represent one single point in time.
Since your business requirement is to assume that the day number is 1 if not provided, just insert that number into the string before parsing.
Dim myDate As Date = Convert.ToDateTime("1 " & MyString)
EDIT:
Sorry, forgot to mention that string manipulations like that are of course culture-dependent. You don't mention what culture you are in. "June 2011" can imply either en-GB or en-US. Since inserting the day number at the start of the string is easier than trying to insert it between the month and year, I suggest you go for something like this.
Dim myDate1 As Date = Date.Parse("1 " & myString, CultureInfo.GetCultureInfo("en-GB"), DateTimeStyles.AllowWhiteSpaces)
Convert.ToDateTime() only takes the full date so try prepending 01 as the day first i.e.
Convert.ToDateTime("01 " + MyString)
DateTime.Parse(MyString).ToString("MM yyyy")
This worked for me
Dim provider As Globalization.CultureInfo = Globalization.CultureInfo.InvariantCulture
Dim MyString As String
Dim d As DateTime = DateTime.Now 'test start
'test all Month Year strings
For x As Integer = 1 To 12
MyString = d.ToString("MMMM yyyy") 'convert date to March 2011 then April 2011 then...
Dim dt As DateTime = DateTime.ParseExact(MyString, "MMMM yyyy", provider)
Debug.WriteLine(MyString & " " & dt.ToString)
d = d.AddMonths(1)
Next
A column in an excel worksheet holds the month in this format:
Oct_2010
What I want to do is, get the last date of that month. What I figured I would do is, read the month in the cell, get the first day of the next month and then subtract one day, so I get the last date of the previous month.
But, how can I get Excel (VBA code) to read Oct_2010 as Oct 2010?
In VBA
Function LastDayFromString(sDate As String) As Date
Dim dtTemp As Date
If Not sDate Like "???[_]####" Then Err.Raise 9999, , "Invalid date string format"
dtTemp = DateValue(Replace(sDate, "_", "/"))
LastDayFromString = DateSerial(Year(dtTemp), Month(dtTemp) + 1, 0)
End Function
Used like
?lastdayfromstring("Oct_2010")
10/31/2010
How about:
=DATE(YEAR(REPLACE(A1,4,1,"/")),MONTH(REPLACE(A1,4,1,"/")),0)
Where A1=Oct_2010
How do I subtract a month from a date object in VB.NET?
I have tried:
Today.AddMonths(-1)
However, given that Today is 01-Jan-2010, the result I get is 01-Dec-2010. The answer I want is 01-Dec-2009.
Is there a convenient way of doing this within the .NET framework?
You actually have to transport Today into a variable and let that assignment work there. The following code will produce the result you expect (I just verified it because your post made me think twice).
Dim dt As DateTime = Date.Today
dt = dt.AddMonths(-2)
Dim x As String = dt.ToString()
This works fine, you need to remember that the DateTime is imutable.
Dim d As DateTime
d = New DateTime(2010, 1, 1)
d = d.AddMonths(-1)
Have a look at DateTime Structure
A calculation on an instance of
DateTime, such as Add or Subtract,
does not modify the value of the
instance. Instead, the calculation
returns a new instance of DateTime
whose value is the result of the
calculation.
Dim d As DateTime = #1/1/2010#
d = d.AddMonths(-1)
I have used the following and it works.
Dim dtToday As DateTime = Date.Today
dtToday = dtToday.AddMonths(-2)