how to handle null values of models in mvc?

Question

I am having a view in that I search student details and bind it in partail view.

In partail view data is bind through a Model.

Model is empty when page load that's why its thorws null refernce error on page load.

So on pagle load my model is null.

I am calling partial view pop up through jquery ajax.

So how to assign some deafults values to that model so ot doesn;t throw error