text box text to validate sql database

Question

i want to validate the text box text from sql table if the value is in the table then the the other column value must display as a output in other textbox.

for example if i enter textbox1.text= phone it must validate the table in a particular column if it available then the textbox2.text display the result.. 

Answer 1

First of all check textbox1 entered value exist in table or not if it exist then select that column value which you want to set textbox2 value and set the textbox2.text value.