How to get auto calculated exp date on lost focus event of reg date

[frmsasp]

Hello There,

I am working with c# & I have used two textbox server control.
1> Registration Date
2> Expiry Date
First of all, user enters value for the first textbox namely Registration Date and then the expiry date should be auto calculated by adding 30 days into currently entered registration date when he user leaves the first textbox.

That means there are two textboxes - user enters the value for first textbox and the second textbox should be auto calcuated on lost focus event of first textbox.
So pls let me know..... Waiting for your answer....

Thanks,
Paresh

 

[JurkMonkey]

DateTime regDate = DateTime.Parse(txtRegistrationDate.Text);

txtExpiryDate.Text = regDate.AddDays(30).ToString();

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