Today’s browsers like Chrome, Firefox, Internet Explorer and Safari has functionality of auto complete values in TextBoxes. If you have enabled this features in your browser, then each and every time when you start to enter value in TextBox you get a drop down of prefilled values in that TextBox. This feature of browser can be disabled by the programming for a specific web form like payment form and other confidential information form of a web application.
In chrome browser, we can enable auto-fill as shown below:
Suppose we have a below form for online payment of product by credit card or debit card then it is mandatory to stop auto complete functionality of browser so that browser doesn’t save the confidential information of a customer’s credit card or debit card.
We can turn off auto-fill for our complete form by setting autocomplete attribute value to off as shown below:
<form id="Form1" method="post" runat="server" autocomplete="off">
We can also turn off auto-fill for a particular TextBox by setting autocomplete attribute value to off as shown below:
<asp:TextBox Runat="server" ID="txtConfidential" autocomplete="off">
We can also do this from code behind also like as: