Answer / kamalakannan.a

<asp:regularexpressionvalidator id="regExpDate"
runat="server"

ValidationExpression="^\d{2}[\/-]\d{2}[\/-]\d{2,4}$"

ErrorMessage="It is not a valid date"
ControlToValidate="txtpatientvisitdate"
EnableClientScript="False"
Display="Dynamic"></asp:regularexpressionvalidator>

Kamal..

Answer / arunajyothi.m

<asp:RegularExpressionValidator ID="revEndDate"
ControlToValidate="txtEndDate" ValidationExpression="((^
(10|12|0?[13578])([/])(3[01]|[12][0-9]|0?[1-9])([/])((1[8-9]
\d{2})|([2-9]\d{3}))$)|(^(11|0?[469])([/])(30|[12][0-9]|0?
[1-9])([/])((1[8-9]\d{2})|([2-9]\d{3}))$)|(^(0?2)([/])(2[0-
8]|1[0-9]|0?[1-9])([/])((1[8-9]\d{2})|([2-9]\d{3}))$)|(^(0?
2)([/])(29)([/])([2468][048]00)$)|(^(0?2)([/])(29)([/])
([3579][26]00)$)|(^(0?2)([/])(29)([/])([1][89][0][48])$)|(^
(0?2)([/])(29)([/])([2-9][0-9][0][48])$)|(^(0?2)([/])(29)
([/])([1][89][2468][048])$)|(^(0?2)([/])(29)([/])([2-9][0-9]
[2468][048])$)|(^(0?2)([/])(29)([/])([1][89][13579][26])$)|
(^(0?2)([/])(29)([/])([2-9][0-9][13579][26])$))"
SetFocusOnError="True" Display="Dynamic"
runat="server">*</asp:RegularExpressionValidator>

Answer / marcelo becerra e

You can use the compare validator control.
you only have to set the OPERATOR to "DATATYPECHECK" and
then select type to "DATE".

End of the problem.

Answer / cherran

Whereas in ASP.Net we can use RegularExpression Validator to
validate the date value. But in VB.NET we have to use Class
RegEx.

If Regex.IsMatch(txtDate,
"(0[1-9]|[12][0-9]|3[01])-(0[1-9]|1[012])-((19|20)\d\d)") Then

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