Question

I am using MVVM for my WPF application. I have a AutoCompleteBox in my xaml file which works normally. But now, I added a bool flag in my ViewModel isHideDropDown which will hide dropdown for the AutoCompleteBox if set to true. To summarise, I want my AutoCompleteBox to work as normal TextBox if isHideDropDown is set to true.

Can anyone give me some idea?

Thanks

Answer 1

Assuming you’re using the AutoCompleteBox described here.

Setting the MinimumPrefixLength to -1 will disable the auto complete functionality of the control.

So, if you add an int MinimumPrefixLength property to your ViewModel that returns -1 when isHideDropDown is true, then you can bind to that. The other option would be to write a value converter that converts the boolean isHideDropDown value to the appropriate integer.