I use onkeypress="return this.value.length" that working fine. but i do copy and paste it keep on putting data in the text box. it should work for copy-paste operation too.
what i need to do for copy-paste operation to work for that too!
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4 Answers
If you are looking for a way to limit what characters can be entered into a text box, you may find that the AjaxControlToolKit can help. It has a control called Filtered Textbox contro. Take a look at http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/FilteredTextBox/FilteredTextBox.aspx
4 Comments
Nomi Ali
yes exactly i was looking for that! but how i use that as to restrict user to enter specific number of character? i search on that but not find!
jason
This can be done without any extenders or javascript. If you are using ASP.Net, just set the max length, like this: <asp:TextBox Text="some text" ID="myId" runat="server" MaxLength="5" ></asp:TextBox>
Nomi Ali
but in the case of multiline text box. which become textarea when render on server. and html textarea does not support max length. then what should i do??? is filtered textbox give me the solution? actually "onkeypress=return this.value.length < 80" works fine but not work for copy-paste operation. its keep pasting even characters exceed from 80.
jason
I'm not sure if the filtered textbox extender can limit the size. You can also try RegularExpressionValidator control: forums.asp.net/t/1170096.aspx/2/10
Use below code to find length while typing
<input type="text" onkeyup="alert(this.value.length)" / >
Hope it helps !! :)
Comments
use onchange with onkeypress. so that whatever you have put there also executes on change
Comments
I think ontextchanged="" could cover it
