using Microsoft.Data.ConnectionUI;

private void buttonConn_Click(object sender, EventArgs e) {     DataConnectionDialog dialog = new DataConnectionDialog();     //添加数据源列表，可以向窗口中添加自己程序所需要的数据源类型     dialog.DataSources.Add(DataSource.SqlDataSource);     dialog.DataSources.Add(DataSource.OdbcDataSource);     dialog.SelectedDataSource = DataSource.SqlDataSource;     dialog.SelectedDataProvider = DataProvider.SqlDataProvider;     //只能够通过DataConnectionDialog类的静态方法Show出对话框     //不同使用dialog.Show()或dialog.ShowDialog()来呈现对话框     if (DataConnectionDialog.Show(dialog, this) == DialogResult.OK)     {         txtConnectionString.Text = dialog.ConnectionString;     } }