asp.net autopostback issue while dynamic elements loading.

Question

We are working on ASP.NET Web Application, We are creating Dynamic Web Pages that dynamically load Controls according to database values. We are getting a postback issue for dynamic Controls values after the Control Event fires.
For Example:

1. While filling the form, if the first TextBox Leaves then it fires the TextChanged Event, and in-between the event fires if anything writes in the next TextBox, Then it will get clear/undo after the event completed.

2) While Filling the form, if Dropdownlist depends on any other control for their values.After the Dropdownlist will load values and make a selection, if any other Control event occurs after that, will result into clear the selection of that dropdownlist.