stricting user to enter data in text box

if i'm making it as read only field than i'll not be able to enter date which i'm entering through calender extender
My requirement is the text box should be filled with selected date in calender only, user could not enter anything else
i m inclluding the code file
 

Hi!

You can just set the text box property to readonly.



Regards...

You can either do this through the properties of the textbox by setting the Enable to false or in ajax you can write Enabled="false" for that textbox.
What I think you need is to set the ReadOnly to True. Again you can do this under the textbox properties or you can set it under the ajax like this:
<asp:TextBox ID="TextBox1" runat="server" ReadOnly="True" Width="249px">asp:TextBox>