Assign value to Label on TextBox focus in ASP.Net

Then try it to add code on LostFocus of txtRate as if you execute any serverside code on focus of txtrate then each time server code will get execute whenver you make click on texbox or focus on it so you will not able to type as every time server side code will get execute infinite time whenver you press the key on txtRate. Better you use to show on Lost focus of txtRate.