Lost Focus method for asp.net textbox?

Question

How to write Lost focus method for asp.net text method? Please anybody have any idea to write this, share with me?

Answer 1

If you want the server to do something after the textbox loses focus you can add AutoPostback="True" and, if you don't want the postback to reload the whole page, use an UpdatePanel:

The function TextBox1_TextChanged can then do something with the text (serverside).