I have a string "2011-06-30 09:55 EDT" that uses the US daylight savings format. Date.Parse cannot convert this because this is a non-standard format (EDT instead of EST). Is there a way to convert this string using Parse?
View 3 RepliesDim StartTime As Date = New Date(2009, 3, 8, 1, 59, 0, DateTimeKind.Local)
Dim EndTime As Date = New Date(2009, 3, 8, 3, 1, 0, DateTimeKind.Local)
Dim TimeDifference As TimeSpan = EndTime - StartTime
[code]....
I have a simple app that just shows the current time for specific locations around the world. I need to have it adjust for daylight savings time. I *THOUGHT* I'd already coded this but....
I thought I would use "Today.IsDaylightSavingTime()" and add 1 hour to the clocks. It isn't working?
If Today.IsDaylightSavingTime() Then
HawaiiOffset = HawaiiOffset + 1
PacificOffset = PacificOffset + 1
[Code]....
I have a form that has clocks for Hawaii, Pacific, Mountain, Central, Easter, GMT/UT, UK, Germany, Mumbai, Manila and China.I assigned a timer to tick the seconds and wrote the following code for the tick:[code]
View 8 RepliesI am trying to get a program to recognize daylight savings in Sydney NSW Australia, but everything else in the program to stay on my current timezone settings Brisbane Qld Australia. All I ned it to do is to check a box (true or false).I have tried typing in dates and coding but I need it to think for itself, I don't want to have to change it every year.I'm using Visual Basic 2008?
View 10 RepliesIs there a way in VB.Net to determine if the timezone the current system has daylight savings time in effect? Of course I can get the offset from GMT using the "z"/"zz" formatting option, but that doesn't tell me if DST is in effect for the current timezone or if the current timezone is in standard time...or if DST/Standard time aren't even an issue in the timezone for the system.
View 4 RepliesI need to write some code to tell the user when daylight savings starts and ends in another timezone, this is what I came up with but it keeps selecting the last Else line. The other lines are working fine, the problem is only with the lines, daylight savings today and not tomorrow. There is probably a much neater way of doing this but I thought this would work.
Private Sub Auto_Time_Change()
Dim sydneyTime As TimeZoneInfo = (TimeZoneInfo.FindSystemTimeZoneById("AUS Eastern Standard Time"))
If TSSlblTimeZone.Text = "Normal Time" Then
If CurDate.AddDays(1).Day = "1" Then
[Code] .....
Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
View 20 RepliesI have string that contains "1.3" and I am checking with Date.TryParse method. It automatically converting into "1/3/2010". How to handle this?
View 1 RepliesI'm using date in the format dd-mm-yyyy and I need to convert a string inthis format to a date type.My string is "18-01-2010" but when I do the conversion using dim TargetDate as date=CDate(TgDstr).where TgDstr is "18-01-2010", the resutant TargetDate, as note in the debugger window, is #1/18/2010# rather than #18/1/2010# which I expected.What change in code should I made to get the desired result?
(P.s. I've checked the current culture with the following line of code:
Dim str As String = CultureInfo.CurrentCulture.Name and get the result 'zh-HK'... and the date-time format I find in the control panel is also in dd-mm-yy format)
I have a problem. I'm making a alarm clock and I need a way of converting a "dd/MM/yyyy HH:mm:ss" format into a date time format. This means I'll be able to compare the dates in a listbox using the for each function, to the current date and see whever it has passed and therfore the alarm should be deleted. It is currently in a string form so I can't use < and > to compare it to the current date as that is in a date form. I've tried using CDate but it doesn't work as it only will convert these formats:
"August 12, 2004", "2:07:30 PM" and "August 12, 2004 2:07:30 PM"
Im trying to write this converter with VB.NET...
View 1 RepliesThis should be really simple and I figured out how to do it in VBA but it's different in .NET. I have a 3 digit Julian date that I would like converted to a regular date (Gregorian). So if the number is 91, then that means April 1st (non-leap year) and if it's 304 then that means October 31st (also non-leap year). In VBA I was using the Day and Month functions to help me get an output to make it mm/dd format.
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is there any ready to go solution within the microsoft framework, regarding conversion of date to day?For example, i would like to convert this string 21/03/2010 (dd/mm/yyyy) to Sunday?
View 5 Repliesi am trying to retrieve data from sql server into vb.net but i have some issues with date/time the date format in sql like '2011-03-08 23: 59: 59. 999'and in visual basic i am using DateTimePicker as custom format like 'yyyy-MM-dd'and the query that i wrote it in vb.net to retrieve data from sql is:select * from TBL where TBL .t_date between CONVERT(datetime,''+'" + DT1.Value + "'+'', 101) and CONVERT(datetime,''+'" + DT2.Value + "'+'', 101)[code]how i can let the user insert the items 'A','BB','CC' between IN brackets by choosing the items from combobox?
View 2 RepliesCan someone please tell me how I would convert a string of "Thu Dec 13 10:00:06 2007" to an actual date?
View 6 RepliesI have a text box in the format of yyyymmdd ie. "20110101" that is derived from an existing access database and want to convert it to mm/dd/yy and place it in a separate text box.
View 11 RepliesIt seems like I keep having problems with dates. I am using the following code:
Dim LocalDateCultureProvider As New CultureInfo(CultureInfo.CurrentCulture.ToString)
Dim CurrentDate As DateTime = Convert.ToDateTime(System.DateTime.Now.ToString("dd/MM/yyyy"), System.Globalization.CultureInfo.InvariantCulture)
ExpiryDate = DateTime.ParseExact(strDate, "dd/MM/yyyy", LocalDateCultureProvider)
If DateTime.Compare(ExpiryDate, CurrentDate) < 0 Then
MsgBox("This file has expired.")
[Code]...
The user will select an entry in a gridview, which then redirects them to a form that is populated with the data from the selected row (thus making the gridview editable in a more user friendly way). Null values are accepted by the DB and I would like to show null date values as blank (or " ") in the corresponding text boxes. Instead I get the error:
Conversion from type 'DBNull' to type 'Date' is not valid.
Here is my code:
'preceded by connection code
Dim sqlcmd As String = "SELECT * from Master WHERE RecNum = @recnum"
'Dim sqlCmd As New OleDb.OleDbCommand("SELECT * from Master WHERE RecNum = @recnum", connection)
Dim FileCommand3 As New OleDb.OleDbCommand(sqlcmd, connection)
[code]....
I have a masked textbox (dd/mm/yyyy hh:mm:ss) and a textbox (hh:mm:ss). I want to calculate the difference of them both and put the result in an other masked textbox (dd/mm/yyyy hh:mm:ss).e.g.13/11/1979 10:00:00 - 15:00:00 = 12/11/1979 19:00:00..I already tried Date.FromOADate(CDbl(dec_time) , where dec_time stands for the difference between first and second part of the equation.
View 3 RepliesI'm having some trouble converting the format of a date in .NET 2008...
Dim currMonth As Date
currMonth = Format(Now, "mmm")
From this code, I need to extract today's date in the format of "mmm" (so it should return.. "Apr")This worked in vb6 but not in .Net, I keep getting some sort of conversion error.. I looked at using theformatdatetime option but it doesnt have the format that I need... only short date/long date...that kind of thing.
I have been unable to correctly convert a string to date. The string is read from a text file and placed into a string, below is a snippet of how the text file is read until the date is field is read:
Dim varOrderNo As String
Dim varDate As String
Static Dim currentrow(20) As String
[Code] .....
I have then tried loads of different ways to convert it to a Date so when I then write it to a SQL Database it enters as a date. The string read from the text file is in the format of 13122011. If I don't try to change it to a Date before writing to SQL it doesn't recognise it as a date and sets the field to 01/01/1900. I have tried and searched loads online and everything i try should work but doesn't.
Dim varDateConvert As Date
varDateConvert = CDate(varDate)
varDateConvert = Convert.ToDateTime(varDate)
varDateConvert = DateTime.Parse(varDate)
All of the above cause my program to drop out / crash at the point of the converting.
I have also tried to format the string to insert the '/' before converting:
txtDate.Text = varDate.Substring(0, 2) & "/" & varDate.Substring(2, 2) & "/" & varDate.Substring(4, 4)
varDateConvert = DateTime.Parse(txtDate.Text, Globalization.CultureInfo.CreateSpecificCulture("en-GB"))
The result for the above is:
From File: 13122011
Substring: 13/12/2011
Convert: 12/13/2011 - Crashes here
I am developing an ASPX VB.NET file. My assignment is to convert an integer representing week of the year into that end date. For example, if user selects Week 4 for 2011, I want to get date = 1/22/11. How do I do this in VB.NET?
View 2 Repliesi have the following setup What i am trying to do is, when the user clicks on the 'calculate age ' button it must calculate the age and display the result based upon the selection in the combobox i.e if 'Days' are selected then it must display in days, if weeks are selected then it must display in weeks..etc
Similarly when the user clicks on the 'convert to date' button , it must subtract the given days(or weeks or months or years) from Todays date and set it to the maskedbox
I use following codes to to convert string to date. In messagebox it displays correct date with format but in textbox it displays only #12:00:00 AM #. How to send date to textbox1 from variable mydate.
Dim mydate As Date
Dim dateString = "31/12/2009"
Dim formats As String() = {"dd/MM/yyyy", "dd/MM/yyyy"}
Dim dateObject As DateTime = DateTime.ParseExact(dateString, formats, System.Globalization.CultureInfo.InvariantCulture, Globalization.DateTimeStyles.NoCurrentDateDefault)
MessageBox.Show(dateObject.ToString("dd/MM/yyyy"))
Me.TextBox1.Text = mydate
I want to receive a date from the user and convert this date to filetime.I understand the System.Runtime..FILETIME data structure as
dwLowDateTime
dwHighDateTime
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I have this example and it gives me exception "Conversion from string x to dateTime is invalid"
here is my method to validate Datetime. Example Date string : "27/03/1985"
Public Function validateDateColumn(ByRef FieldName As String) As Boolean
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I'm trying to do some validation testing in VB.NET. If Entity.WeekEndDate.ToString = String.Empty Then ErrorList.Add(New cValidationError("id", "Incorrect Week End Date"))
Where WeekEndDate is of type Date. When I originally build the object, how can I insert a value into WeekEndDate that will generate an empty string(ie. "") when converted from a Date to a String?
Today i am trying to convert a date i put in a textbox(txtJulian) to a normal date like 02/05/2011(or any other conversion depending what is imputed in the textbox). I cant get it to print to correct date. When I type 011-2011 it print out 1/11/2000when I want it to print 1/11/2011. Also the error messag doesnt show when I type nothing or the correct format in the txt box. Here is my code
View 10 RepliesI am pulling two fields and putting them together with a "-". When I export to excel it seems to think that the string is a date and converts it from 11-11 to 11-Nov. I can't seem to figure out how to fix this.I am exporting a gridview into excel. This asp.net using .net 3.5 and vb.net within VS 2008.
Response.Clear()
Response.Buffer = True
'grab filename from filename box
[code].....