Question

Can someone help me ?

i want datagridview display data

datagridview1.datasource = _db.Students.Tolist();

and it display on data grid. and has a button.if the button click, datagridview1 will add the rows with no data. And the User fill the rows. when it done it will save to database.

How to make it work ?

Answer 1

If I remember correctly, DataGridView has a .Rows.Add property, like this:

dataGridView.Rows.Add  

and

dataGridView.Rows.Insert

You should convert your data into an array first.
Take a look here: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rows.aspx