How do I disable AutoComplete in ASP.NET?

Popular web browsers have a feature called AutoComplete which saves information that has previously been inputted. Web addresses, form data and username/passwords are usually recorded to make life easier in the future.

As a developer, you may want to disable this feature for some types of input including credit card information. ASP.NET has the ability to override the user's choice with the autocomplete attribute by setting it to off. This can be added to a form tag or an individual TextBox control.

Examples:

<form runat="server" autocomplete="off"></form>
 
<asp:TextBox ID="tbCreditCardNumber" runat="server" autocomplete="off" />
 
(Runtime)
tbCreditCardNumber.Attributes.Add( "autocomplete", "off" );

Alternatively, you can use the AutoCompleteType attribute on an individual TextBox control and set it to Disabled to achieve the same result.

Example:

<asp:TextBox ID="tbCreditCardNumber" runat="server" AutoCompleteType="Disabled" />
 
(Runtime)
tbCreditCardNumber.AutoCompleteType = AutoCompleteType.Disabled;