Like the title says, I am trying to return only the month and day parts of the date field like this '10/12' or '5/5'. I tried using left(date,5), but if the date is '5/5/2018' it will return '5/5/2'. I know substring might be useful but I didn't know how to use it since there is two '/' in the field. Thanks in advance for your responses.
If it is really a date in VB, just use the built-in date functions to get the data you need rather than treating it like a string.
Try something like this:
Dim dt As New Date(2018, 5, 5)
Dim myVal As String = dt.Month & "/" & dt.Day
Parse your date string into a DateTime and then use the ToString method with your desired format.
Sub Main
Dim dateStr As String = "5/5/2018"
Dim dt As DateTime
dt = DateTime.Parse(dateStr)
Console.WriteLine(dt.ToString("M/d"))
End Sub
Related
So I have this datetime value of 9.3.2016 18:56:12, by using datetime.parse, I can get the values but instead of getting '3' as the month, it takes '9' as month and '3' as day which is incorrect.
dim d1 as string = "9.3.2016 18:56:12"
dim d2 as datetime = datetime.parse(d1, CultureInfo.InvariantCulture)
I don't want to use datetime.parseExact because I'm having more than 1 value in the database.
Please help :( thank you!
Since you current culture appears to interpret dates in the way you expect you could simply do this,
Dim dateString = "9.3.2016 18:56:12"
Dim dateValue = DateTime.Parse(dateString)
By not specifying the InvariantCulture, you instruct DateTime.Parse to use the current culture which, in your case, interprets the date string correctly.
Sorry I've got the solution.
dim d2 as datetime = convert.todatetime(d1)
I want to filter SQL-table between start date and end date, I used before string variable then I use string.format to make the format mm/dd/yyyy, I tried now in VB.net 2015 the following code:
Dim S as String
s=inputbox("Enter Start date")
S=string.format(S,"mm/dd/yyyy")
But it doesn't work, can somebody give me a solution?
You could try this for handling the input value, assuming you only need the date value as a formatted string, since your question is about formatting a date:
Dim S As String
S = InputBox("Enter Start date")
If IsDate(S) = True Then
Dim d As Date = Date.Parse(S)
S = d.ToString("mm/dd/yyyy")
Else
'Handle the non date input here
End If
But I think you should consider #Plutonix comment, since we don't know exactly how you are sending the date to perform the filtering, or how your table fields are defined.
Regards!
I have a date in string variable strOrderEndDate which looks like this 8/14/2015.
I would like to convert it to 2015-08-14.
How do I do this in vb.net?
I tried strOrderEndDate.ToString(yyyy mmmm dd) but its not working
As the comments indicate, you first need to convert the string to a date using CDate. Then you can use the .ToString method on the new date type variable to format the output as desired:
Dim strOrderEndDate As String = "8/14/2015"
Dim datOrderEndDate As Date = CDate(strOrderEndDate)
MsgBox(datOrderEndDate.ToString("yyyy-MM-dd"))
...or as Plutonix recommends, you can use DateTime.Parse to perform the conversion. He's pretty smart so if he says it's better, then it's better.
Dim datOrderEndDate As Date = DateTime.Parse(strOrderEndDate)
Hi I'm new to coding and am looking for some help! I've been trying to add 1 month to a date that I've already stored in my database and displayed on a gridview.
Dim dueDate As DateTime = lblDateA.Text.AddMonth(1)
I know the way that I've done it is wrong but i hope you get the idea i'm going for! Thanks in advance!
First convert the date to a DateTime and add Month to it.
Dim dueDate As DateTime = Convert.ToDateTime(lblDateA.Text).AddMonths(1)
Firstly, the Text of a Label is a String, so you can't add a month to it. Whatever you're displaying in that Label should already be being stored in a DateTime variable somewhere. You would then add one month to that and then display the new value, e.g.
Me.dateA = Me.dateA.AddMonths(1)
lblDateA.Text = Me.dateA.ToShortDateString()
You convert the text to a Date and then add the month.
Private Function ConvertDGVDateAndAddMonth(dateAsString As String) As Date
Dim dt As Date
If Date.TryParse(dateAsString, dt) Then
'parsed correctly so we can use the dt variable as a date
Return dt.AddMonth(1)
End If
'if it does not convert return Nothing
Return Nothing
End Function
USage:
Dim dt As Date = ConvertDGVDate(dgv.CurrentCell.Value.ToString)
'if this does not convert dt = Nothing
'be sure to check
I need to get a date field from MM/dd/yyyy to yyyy/MM/dd in vb.net but it should still be a date field afterward so that I can match it against a date in a database.
At the moment all I'm managing to do is to change it to a string in that format.
I tried this type of code which also did not work.
DateTime.Parse(yourDataAsAString).ToString("yyyy-MM-dd")
fromDeString = String.Format("{0:yyyy/MM/dd}", aDate)
fromDate = Format("{0:yyyy/MM/dd}", aDate)
Any help would be much apreciated, thanks
You're not understanding that a date object does not store the digits in any particular format. The only way to get the digits formatted in the order you want is to convert it to a string. Why do you need to compare them in a particular format? A date is a date no matter how it is formatted. 12/15/78 == 1978/12/15.
If you are not able to compare dates from the DB against a date object in VB, it is likely that the date you are comparing to in the database is being returned to you in string format, in which case you should covert it to a date object for comparison.
Dim sDate As String = "2009/12/15" 'Get the date from the database and store it as a string
Dim dDate As New Date(2009, 12, 15) 'Your date object, set to whatever date you want to compare against
Select Case Date.Compare(dDate, Date.Parse(sDate))
Case 0
'The dates are equal
Case Is > 0
'The date in the database is less
Case Is < 0
'The date in the database is greater
End Select
Here's a sample module demonstrating the functionality you desire.
Imports System.Globalization
Module Module1
Sub Main()
Dim culture As New CultureInfo("en-us", True)
Dim mmDDyy As String = "10/23/2009"
Dim realDate As Date = Date.ParseExact(mmDDyy, "mm/dd/yyyy", culture)
Dim yyMMdd As String = realDate.ToString("yyyy/MM/dd")
End Sub
End Module
Hope this helps.
Kind Regards
Noel
Your second should actually work. Instead just try:
dim chislo as date = date.now dim message As String = $"
Today`s Date: {String.Format("{0:dddd, dd/MM/yyyy}", Chislo)} "
MsgBox(message)