Validating date in vb net updating system caches timeout 60sec dont worry nothing fatal

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But if the datefield is in a grid, the date is not always set, only every second time.It works, if I type in a number and then press enter-key or tab-key or click outside the gid.Private Sub txt Hire Date_Validated(By Val sender As Object, By Val e As System. Validated Dim date String As String = txt Hire Date.Text Dim formats As String = "MM/dd/yyyy" Dim date Value As Date Time If Date Time.Try Parse Exact(date String, formats, New Culture Info("en-US"), Date Time Styles.None, date Value) Then End If Note that year month day format cannot be confused when working with standard north american dates. "; Since you didn't specify the format you were looking for (I assume US) I didn't modify this to work for you, but it's a simple matter of moving the blocks around and changing the allowed delimiters. Set Error(tb App1, "This is not a valid date; Enter in this format ('M/d/yyyy' or 'M/d/yy')") End If Else Error Provider1. Clear() End If End Sub 'Private Sub mtb App1_Type Validation Completed(By Val sender As Object, By Val e As Type Validation Event Args) Handles mtb App1.

Hello, I have a datepicker with validation rule that calculates a new date, if the input is a number. if today is 12/24/2016 and I type in 2 I get the date 12/26/2016. This happens if I type in a number and after that i click on another gridcolumn.

okay, i found a solution on the date format, while i'm having trouble on validating if the string is numeric in regex..

Click Dim pattern As String = "^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$" Dim regex As New Regex(pattern) If regex.

Try Parse Exact(input, "MM/dd/yyyy", New Globalization.

Format("The string '' parsed to ''", input, dt)) Else Message Box.

None, date Val) Then return Error = True End If Return return Error End Function` Public Function Validate JDate For Error(By Val check Input Value As String) As Boolean Dim return Error As Boolean Dim date Val As Date If Date. Parse Exact means you will provide the EXACT format mask.

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