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Combobox Match Behaviour when DropDownStyle = DropDownList

Posted on 2016-08-23
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Last Modified: 2016-09-03
I have an Combobox with DropDownStyle = DropDownList. This DropDownStyle should not be changed!
When the user types a Letter, the DropDownList moves to the first entry starting with this letter. Is it possible to overwrite this behaviour? For example the DropDownList should move to the first entry containing the letter, typed by the user?
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Question by:jdkern
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Expert Comment

by:Ramkisan Jagtap
ID: 41766499
You can not achieve this without customization. You need to write custom code and extend the behaviour of the Combobox.
Please refer the following article:
http://www.codeproject.com/Tips/755707/ComboBox-with-Suggestions-Based-on-Loose-Character
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Author Comment

by:jdkern
ID: 41766554
Sorry, the proposed example from codeproject does not work with DropDownStyle = DropDownList!
Clearly, I have to write custom code to change the behaviour. But which method should I best overwrite? KeyPress? Or is there a better way?
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Expert Comment

by:Ramkisan Jagtap
ID: 41766591
You can use the onSelectionChanged event
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Accepted Solution

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jdkern earned 0 total points
ID: 41775849
Thank you, Ramkisan Jagtap!

I solved my Problem.

Roughly speaking I catch the pressed Letters in KeyPress and store them in a string "userInput".
In OnSelectedIndexChanged I search the best match for "userInput" with the help of the FindString method and set SelectedIndex to the corresponding value.
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by:Ramkisan Jagtap
ID: 41775892
Good to know that you found the solution.

 Cheers
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Author Closing Comment

by:jdkern
ID: 41782781
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