protected void btndb_Click(object sender, EventArgs e) { string str = "Data Source=desktop-tb3r1mj;Initial Catalog=nibl;Integrated Security=True"; connectdb.Class1 db = new connectdb.Class1(str); if (db.connect() == true) { Response.Write("Database connected successfully!"); string sql = @"select * from info"; db.sqlreader(sql); db.dataread(sql); gdview2.DataSource = db.dataread(sql); gdview2.DataBind(); } }