delete command not performing in gridview

See more:

ASP.NET

hi all,
in my gridview ,i was not able to perform delete operation .here is the code.

public void delete(string name)
        {

            using (SqlConnection con = new SqlConnection(@"Data Source=SATEESH\SQLEXPRESS;Initial Catalog=demo;Integrated Security=True"))
            {
                con.Open();
                using (SqlCommand cmd = new SqlCommand("sp_delete", con))
                {

                    cmd.Parameters.AddWithValue("@name", name);

                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.ExecuteNonQuery();
                                }
                        
            }
        
        }

in ROW DELETING EVENT i called that method.

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
       {
           string name = GridView1.Rows[e.RowIndex].Cells[0].Text;
           delete(name);
           bindgridview();
       }

the stored procedure is

create proc sp_update
@name varchar(max),
@email varchar(max),
@phone int
as
begin
update register
set
email=@email,
phone=@phone
where name=@name
end;

everything is working fine ,no error, but the operation is unable to perform.in debug mode i checked and found out string name="".i dont know why its becoming null