仿VS的AddConnection功能，获取服务器列表及数据库列表

 private void GetServerName()
 {
 List serverList = new List();

 DataTable dataTable = SqlDataSourceEnumerator.Instance.GetDataSources();

 DataRow[] rows = dataTable.Select("", "ServerName,InstanceName Asc");

 foreach (DataRow row in rows)
 {
 string server = row["ServerName"].ToString();
 if (string.IsNullOrEmpty(row["InstanceName"].ToString()) == false)
 {
 server = server + "\\" + row["InstanceName"].ToString();
 }

 serverList.Add(server);
 }

 this.SetComboBoxItemSource(cbServer, serverList);
 }

 private void GetDataBasesName()
 {
 List dataBaseList = new List();

　　　　 //获取服务器、用户名和密码，可以自己改改参数。
 string server = this.GetControlText(this.cbServer);
 string uid = this.GetControlText(this.txtUid);
 string pwd = this.GetControlText(this.pbPwd);

 string connString = string.Format("server={0};database=master;uid={1};pwd={2}", server, uid, pwd);
 string sql = "select name from SYSDATABASES order by name";

 SqlConnection conn = new SqlConnection(connString);
 try
 {
 conn.Open();
 SqlCommand cmd = new SqlCommand(sql, conn);
 SqlDataReader reader = cmd.ExecuteReader();

 while (reader.Read())
 {
 dataBaseList.Add(reader[0].ToString());
 }
 }
 catch (Exception)
 {
 //throw;
 }
 finally
 {
 conn.Close();
 }

 this.SetComboBoxItemSource(this.cbDataBase, dataBaseList);
 }