阻止使用AngularJs提交Webform

I am developing a application with asp.net webform and angularJs. I have a form. the form loads data in tabular format. there are a Edit button on each row. the purpose of edit button is to edit the row. type of edit button is 'submit'. so when i click the edit button it refreshes the form. But I want to prevent this to be happening. so i have written a method in my controller. but it's not working. the code is given bellow:I am developing a application with asp.net webf