private void tampilkanDataSiswa() { string query = "SELECT * FROM " + tabel_siswa; DataSet ds = koneksi.tampilkanData(query, tabel_siswa); dataGridView_Siswa.DataSource = ds; dataGridView_Siswa.DataMember = tabel_siswa; dataGridView_Siswa.AutoResizeColumns(); dataGridView_Siswa.Columns[6].DefaultCellStyle.Format = "dd-MM-yyyy"; }