ASP.NET 4 Unleashed

Using the FilteredTextBox Control

The FilteredTextBox extender control enables you to prevent users from entering the wrong type of content into TextBox. You can use the FilteredTextBox extender control, for example, to create TextBox that accepts only numbers.

The page in Listing 39.6 illustrates how to use the FilteredTextBox control. The page contains two TextBox controls. The first TextBox accepts only numbers. The second TextBox accepts lowercase letters, underscores, and exclamation marks.

Listing 39.6. ShowFilteredTextBox.aspx

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