How to prevent a drag and drop text and Copy paste text in your textbox control

You can prevent a drag and drop value from your page and a copy paste text in your textbox.

for ex. I have a textbox

<asp:TextBox ID="txtSeqNumber" runat="server"  Width="150">

How i can prevent this? Most of the time this error is reported by testers. The simplest solution is as

follows

Just add following javascript in the code

<asp:TextBox ID="txtSeqNumber" runat="server" onDrop="blur();

return false;" onpaste="return false"  Width="150">

Because of blur() function the txtSeqNumber lost its focus and we are not able to darg and drop the text.