Information.IsDate Method

Syntax

'Declaration
Public Shared Function IsDate ( _
    Expression As Object _
) As Boolean

public static bool IsDate(
    Object Expression
)

Remarks

IsDate returns True if Expression is of the Date data type or can be converted to Date; otherwise, it returns False.

The Date data type holds both a date value and a time value. IsDate returns True if Expression represents a valid date, a valid time, or a valid date and time.

Examples

The following example uses the IsDate function to determine if several variables represent valid Date values.

Dim firstDate, secondDate As Date
Dim timeOnly, dateAndTime, noDate As String
Dim dateCheck As Boolean
firstDate = CDate("February 12, 1969")
secondDate = #2/12/1969#
timeOnly = "3:45 PM"
dateAndTime = "March 15, 1981 10:22 AM"
noDate = "Hello"
dateCheck = IsDate(firstDate)
dateCheck = IsDate(secondDate)
dateCheck = IsDate(timeOnly)
dateCheck = IsDate(dateAndTime)
dateCheck = IsDate(noDate)

In the preceding example, IsDate returns True for the first four calls and False for the last call.

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

See Also

Reference