Dynamic validation on textbox

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hi guys,

pls again me out of this situation.

i have an dropdown list which is mandatory by validation and If dropdown list selected yes then text is visible. i want it will mandatory on selected yes if user select no then it is not mandatory.

pls help how can i do this.

Posted 21-Nov-12 10:09am

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[no name] 21-Nov-12 23:48pm

Could you please provide your dynamic generation of dropdown list.

In subject you mentioned validation for text box but in description asking validation for dropdown list.

Mohd. Mukhtar 22-Nov-12 2:10am

What have you tried?
Copy your code here by clicking improve question.

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Fathima, Coimbatore · Answer 1 · 2012-11-21T19:55:00

on the textchange event of dropdownlist control, check whether the dropdownlist selected value is yes, if so display the textbox else dont display it.
Then validate the textbox as,
if (txt1.Visible == true && txt1.Text == "") -- you can validate like this..

or you can validate like,
if(dropdownlist.selectvalue == "Yes" && txt1.Text == "")