private void FileOpen() { OpenFileDialog dlg = new OpenFileDialog(); dlg.Filter = "Excel文件|*.xls;*.xlsx|所有文件|*.*"; if (dlg.ShowDialog() == DialogResult.OK) { this.tbFileName.Text = dlg.FileName; dlg.Dispose(); dc.DBName = tbFileName.Text; dsExcelFile = new ExcelDBSource(dc); cbbSheets.DataSource = dsExcelFile.GetTableNames(); cbbSheets.SelectedIndex = 0; } }