Telerik UI for Windows Phone by Progress

RadAutoCompleteBox supports definining a symbol count that must be reached in the input string before a filtering operation is performed. This is done using the FilterStartThreshold property.

Using the FilterStartThreshold property

The FilterStartThreshold property is of type int and can be used to define the length of the input string after which the filtering procedure is started. This may be used in scenarios where the user needs to type a given amount of symbols at least to perform filtering.

The following XAML code snippet demonstrates setting the FilterStartThreshold property:

<telerikInput:RadAutoCompleteBox FilterStartThreshold="3"/>