Validating date in textbox in asp net group dating definition

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To check is string a valid date you can use Compare Validator.

Let say you have one Text Box control on web form, named txt Only Valid Date.

From there, the format must match the Culture Info's short date pattern and date separator.

It also handles 2 digit years and converts them to 4 digit years.

I'm using a comparevalidator where operator is set Data Type Check.

Work fine but when the date entered is mm/dd/yy nothing seems to happen (no events fired, no error message, page just remains the same). thx In fact, when you use Compare Validator control to validate date type.

validating date in textbox in asp net-70

validating date in textbox in asp net-67

validating date in textbox in asp net-72

Again, please keep their identity a secret Click on the "Continue" button search with your zip/postal code. But yes, you can definitely validate the input i.e the date format. ="^(((((0[1-9])|(1\d)|(2[0-8]))/((0[1-9])|(1[0-2])))|((31/((0[13578])|(1[02])))|((29|30)/((0[1,3-9])|(1[0-2])))))/((20[0-9][0-9]))|((((0[1-9])|(1\d)|(2[0-8]))/((0[1-9])|(1[0-2])))|((31/((0[13578])|(1[02])))|((29|30)/((0[1,3-9])|(1[0-2])))))/((19[0-9][0-9]))|(29/02/20(([02468][048])|([13579][26])))|(29/02/19(([02468][048])|([13579][26]))))$" Hi, It will be difficult to stop the user from changing the date in the textbox.When you type string like 'mm/dd/yy' format, it success.So, if you hope to avoid the user type the data like this format, you should customize your own format, please refer to the following code: Here, I create a demo which you must typed the data as 'yyyy-MM-dd' format.

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