How to convert date format in vb.net?

I am getting xml response date format string is "MM/dd/yyyy h:mm:ss a" but I need convert other date format ""dd MMM yy HH:mm"". How to convert date format in vb.net? Please give me any suggestion.

Assuming you want to convert the xml string value to a proper DateTime variable, Net has many methods for this:

' a date value in the string format specified:
Dim xmlDate As String = "07/15/2014 7:07:33 AM"

' create a DATE variable from that string in a known format:
Dim newDate As Date = DateTime.ParseExact(xmlDate, "MM/dd/yyyy h:mm:ss tt",
           Globalization.CultureInfo.InvariantCulture)

Once you have am actual date variable, you can display it in any format required. Doing so does not change the underlying date value, it just changes the output style:

Dim myDt As DateTime = DateTime.Now

Console.WriteLine(mydt.ToString("dd MMM yy HH:mm tt"))
Console.WriteLine(mydt.ToString("MM/dd/yyyy h:mm:ss")) 

DateTime types are a value; they do not have a format. Formats are for how we display data to humans (as with .ToString() above) and how we tell DataTime the pattern to expect when parsing text data from humans into a DateTime variable.

You must be careful when using many of the VB functions. Some do not create date types at all, just new string variables. CDate can be especially problematic when using date strings from other cultures . It assumes the string is in the current culture format, which may not be the case. This can lead to 08/07/yyyy converting to 07/08/yyyy.


From original question: I am getting xml response date format string is "MM/dd/yyyy h:mm:ss a"

From comment: xml returning date format is "7/8/2014 12:00:00 PM"

The format specified in the question does not match the example posted in the comment. The xmlDate text is in fact in M/d/yyyy format, not MM/dd/yyyy! Using ParseExact means we are giving DateTime the exact format to expect. When the format does not match the actual string pattern, it will fail:

Dim actualDate As Date
Dim xmlTest As String = "7/8/2014 12:00:00 PM"

actualDate = DateTime.ParseExact(xmlSource, "MM/dd/yyyy h:mm:ss tt",
                                 Globalization.CultureInfo.InvariantCulture)

This will fail because the text is not in MM/dd format. Note that "M/d" can parse dates from strings in the pattern of "MM/dd" because some days and months will be 2 characters ("10/20..."). But the reverse is not true: "MM/dd" will require the leading 0. Specify the correct format and you wont get a format exception:

 actualDate = DateTime.ParseExact(xmlSource, "M/d/yyyy h:mm:ss tt",
                                 Globalization.CultureInfo.InvariantCulture)


ParseExact is probably the best approach here, because it appears you are importing data from elsewhere. For simple data validation of user input, Parse or TryParse are usually enough. These will try to parse the text using any of the format patterns defined for the current culture.

Some cultures have well over 100. This means the user can input date data almost anyway they want and your code can still parse/convert it to a DateTime type.

See DateTime.ParseExact for more information.

How to convert date format in vb.net?, They contain numeric value that represents the date and time. When converting from DateTime format to String format, a "format" string is included to tell the Format function how to create the Tested Visual Basic .NET 2012. VB.NET program that causes FormatException Module Module1 Sub Main() Dim testDate As DateTime = New Date(2000, 1, 1) Dim result As String = testDate.ToString("*") End Sub End Module Output Unhandled Exception: System.FormatException: Input string was not in a correct format. at System.DateTimeFormat.GetRealFormat

Dim theirTime = "07/15/2014 1:43:38 PM"
Dim myFormat = "dd MMM yy HH:mm"

Dim myTime = Format(CDate(theirTime), myFormat)

[Solved] how do you convert the date format from MM/dd/yyyy hh:mm , VB.NET program that uses format string with DateTime Module Module1 Sub Module Module1 Sub Main() Dim testDate As DateTime = New Date(2019, 1,  These will try to parse the text using any of the format patterns defined for the current culture. Some cultures have well over 100. This means the user can input date data almost anyway they want and your code can still parse/convert it to a DateTime type. See DateTime.ParseExact for more information.

Dim dat As Date
Dim dd, mm, yyyy As String

DateTimePicker1.Value = DateTimePicker1.Value.AddDays(1)

If Len(DateTimePicker1.Value.Day) = 2 Then
    dd = DateTimePicker1.Value.Day
Else
    dd = "0" & DateTimePicker1.Value.Day
End If

If Len(DateTimePicker1.Value.Month) = 2 Then
    mm = DateTimePicker1.Value.Month
Else
    mm = "0" & DateTimePicker1.Value.Month
End If

yyyy = DateTimePicker1.Value.Year

dat = dd & "/" & mm & "/" & yyyy

VB.NET DateTime Format, For purposes of type conversion, Visual Basic considers 1/1/1 (January 1 of the year 1) to be a neutral value for the date, and 00:00:00 (midnight) to be a neutral​  Convert String to DateTime. In .Net, you can work with date and time easy with the DateTime class. You can use the methods like Convert.ToDateTime(String), DateTime.Parse() and DateTime.ParseExact() methods for converting a string-based date to a System.DateTime object.

You can do it like this:

Dim time As DateTime = DateTime.Now  'Your date
Dim format As String = "dd MMM yy HH:mm"
Dim newdate = time.ToString(format)

Strings.FormatDateTime(DateTime, DateFormat) Method (Microsoft , NET Core Windows Forms application that lets you apply format strings to either numeric or date and time values and Source code is available for C# and Visual Basic. Unable to convert '12-30-2011' to a date and time. A date and time format string defines the text representation of a DateTime or DateTimeOffset value that results from a formatting operation. It can also define the representation of a date and time value that is required in a parsing operation in order to successfully convert the string to a date and time.

Dim CommenceDateFormat As Date = 
    Date.ParseExact(CommenceDate, "dd/MM/yyyy", System.Globalization.DateTimeFormatInfo.InvariantInfo) 'converts date to a format understood for comparisons
Dim EndDateFormat As Date = 
    Date.ParseExact(EndDate, "dd/MM/yyyy", System.Globalization.DateTimeFormatInfo.InvariantInfo)

Custom date and time format strings, ToString method with some formatting options is a nice simple way to achieve the desired date or time string. Below are a few examples on how  Convert a string to a datetime. VB.net yyyymmdd format needs to parse as date. 0. how to convert string to date in vb.net for compare with current date-2.

Formatting Dates in VB.net using ToString, Dear Friends, I am using VB 6.0 with SQL Server 2000. The problem is if change the date format from "Control Panel > Regional and  Actually OP has no problem with parsing 1400 to a DateTime: "And it would give me this: 6/12/2012 02:00:00 PM I do not want the date part, neither do I need the seconds. All I need is 2:00PM" He just wants to convert a DateTime variable to a String with the proper format.

How to Convert Date Format-VBForums, Well to set the Text of your label, I would use the ToString method of DateTime with a format string. See here for examples. The DateTime.Parse function in the VB.NET language is useful in many programs where you want to convert a string into a DateTime instance. The DateTime type provides more options for programmatic use. And: The string type is more useful for input and output such as writing to files.

vb.net, I am trying to get the date value from calender control and then insert that date from vb code behind file in my sql database date field whose format then it throw excemption saying "Conversion failed when converting date  The code defines the DateTime variable dateTimeInfo and sets its value to the current Date/Time. Then, I define the String variable strMonth and convert the value of dateTimeInfo into a String in

Comments
  • +1 for using ParseExact and InvariantCulture. Well said all around
  • hi xml returning date format is "7/8/2014 12:00:00 PM" above steps i am folowing its returning errorSystem.FormatException was unhandled by user code HResult=-2146233033 Message=String was not recognized as a valid DateTime. Source=mscorlib
  • see edit - you did not correctly describe your problem in the original question, so the code cannot be just cut and pasted. @NarasimhaKolla
  • hi friend,i edited my question and understood the problem what i made. i will improve my self .Thank you very much for your kind support.issue is clear
  • Their time format can be "dd/MM/yyyy" or "MM/dd/yyyy". For example "11/12/2019". Is "12", day or month? I think it could be a Problem.
  • Welcome to Stack Overflow :-) Instead of just posting some lines of code, please always add an explanation of that code to your answer. Otherwise it might be classifed as incomplete and might be removed.