Diaplay the equivalent value in the textbox by using SQL Table

Question

Here i included sql table named TVOP with 2 columns Operation & Opcode. Here in this scenario when i select the operation in the dropdown list 2 then the equivalent opcode must be displayed in the text box

Answer 1

You can do this do this on text change event on TextBox  but make sure TextBox AutoPost back Property must be true if Not the Set it true without post back you cant generate any control in Asp.Net