I'm currently using a text box to filter some entries. I have the display updating on the text box TextChanged event, so the user isn't hitting enter or pressing a button to begin filtering. I want to use an AutoCompleteStringCollection to remember entries typed into the text box; however, if I save every string from the text box when the TextChanged event is fired then it will store all the substrings of each filter term.
So for instance, if I typed the string "test" it would display:
"test" as recommended strings. I just want the last string added to the AutoCompleteStringCollection.
I've thought about two separate methods I could implement.
1) I could create a
Task that waits "x" amount of time after the last TextChanged event before it adds the string to the AutoCompleteStringCollection. If I did this I would have to use a cancellationToken to cancel the Task every time the textChanged event fired. This is slightly more complicated because I'm using .NET 4.0.
2) I could also search through the AutoCompleteStringCollection every time a string is added and remove all substrings (that start at the beginning of the word). This may backfire if the user types in a more specific filter, but still wants to store the shorter one.
Is there a better way to go about doing this? Which method would you recommend?