private void button2_Click(object sender, EventArgs e) { ConnectBL conBL = new ConnectBL(); ConnectBO conBO = new ConnectBO(); OpenFileDialog openFileDialog1 = new OpenFileDialog(); openFileDialog1.InitialDirectory = "c:\\"; openFileDialog1.Filter = "All files (*.*)|*.*"; openFileDialog1.RestoreDirectory = true; if (openFileDialog1.ShowDialog() == DialogResult.OK) { conBO.path = openFileDialog1.FileName; conBL.Export(conBO); MessageBox.Show("Export Completed!"); } }