CODEWITHSUNDEEP
wpfeventstextboxtextchangedlost-focus
thecoop
thecoop

Reputation: 46158

Having TextChanged Event Fire Immediately as Text is Typed into TextBox

On a wpf TextBox that has an TextChanged event, it seems to only fires when focus is taken away from the textbox; but not as individual characters are typed in.

Is there an event similar to TextChanged that fires immediately when a character is typed into the textbox, rather than when focus changes?

Upvotes: 15

Views: 22676

Answers (3)

Aaron McIver
Aaron McIver

Reputation: 24723

You can bind the Text property and make use of the UpdateSourceTrigger.

UpdateSourceTrigger=PropertyChanged

By setting it to PropertyChanged, you will get a notification each and every time the text changes.

Upvotes: 28

brunnerh
brunnerh

Reputation: 185445

TextChanged does fire as soon as the text is changed.

(If you have a binding on Text that is not the same thing, it is completely independent from the event.)

Upvotes: 12

Bathineni
Bathineni

Reputation: 3496

@Anron answer is correct but i think it works only when we are doing Data binding (using MVVM).

From @thecorp question what i have understood is he is trying to it in code behind file.

You can take advantage of "KeyDown" and "KeyUp" events of textbox or if you are using data binding Aaron anwer should resolve your issue.

Upvotes: 2

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