Data Controls :: Call GridView RowDataBound Event On Button Click

I have a gridview, I would like to call an event gridview rowdatabound on button click, but in gridview are edittemplate that uses textbox.

Is when I can call event RowDataBound on button click, edittemplate value in gridview can calculate?

here's my code

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) {
decimal d1 = 0, d1e = 0, d2e = 0, d3e = 0, d4e = 0, d5e = 0, d6e = 0, d7e = 0, d8e = 0;
decimal d1f = 0, d2f = 0, d3f = 0, d4f = 0, d5f = 0, d6f = 0, d7f = 0, d8f = 0;
decimal tv = 0;
decimal harga = 0;
decimal totalval = 0;

[CODE]