Make TxtChanged fire on any key

I have a textbox in my aspx (C# backend) where I've made a TextChanged event function (and I have set AutoPostback to true).

This apparently only fires when I press Enter. How to make it fire on any key?

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Originally Posted by Lars_V_J

I have a textbox in my aspx (C# backend) where I've made a TextChanged event function (and I have set AutoPostback to true).

This apparently only fires when I press Enter. How to make it fire on any key?

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It should fire when the control loses focus. Does it?