获取数据库列表取决于选择的服务器

Question

我正在使用带有框架 4.0 和 SQL Server 2008 R2 的 C#。 我已经用这段代码列出了 SQL Server 2008：

 public static string[] GetSQLServerList()
        {
            SqlDataSourceEnumerator dse = SqlDataSourceEnumerator.Instance;
            DataTable dt = dse.GetDataSources();
            if (dt.Rows.Count == 0)
            {
                return null;
            }

            string[] SQLServers = new string[dt.Rows.Count];
            int f = -1;
            foreach (DataRow r in dt.Rows)
            {
                string SQLServer = r["ServerName"].ToString();
                string Instance = r["InstanceName"].ToString();
                if (Instance != null && !string.IsNullOrEmpty(Instance))
                {
                    SQLServer += "\\" + Instance;
                }
                SQLServers[System.Math.Max(System.Threading.Interlocked.Increment(ref f), f - 1)] = SQLServer;
            }
            Array.Sort(SQLServers);
            return SQLServers;
        }

我在 ComboBox 上列出了我的服务器。

如何列出数据库，取决于我在 ComboBox 中选择的服务器？

我找到了这个tutorial，但是它需要sqlconnection，我没有选择服务器怎么连接？

Answer 1

这是您获取网络上服务器名称列表的方式：

List<String> ServerNames = new List<String>();

 SqlDataSourceEnumerator servers = SqlDataSourceEnumerator.Instance;
 DataTable serversTable = servers.GetDataSources();

     foreach (DataRow row in serversTable.Rows) {
            string serverName = row[0].ToString();

             try {

                if (row[1].ToString() != "") {

                            serverName += "\\" + row[1].ToString();

                }


              }
              catch {


              }

              ServerNames.Add(serverName);
      }

从选定的服务器获取数据库列表：

List<String> databases = new List<String>();

SqlConnectionStringBuilder connection = new SqlConnectionStringBuilder();

 connection.DataSource = SelectedServer;
 // enter credentials if you want
 //connection.UserID = //get username;
// connection.Password = //get password;
 connection.IntegratedSecurity = true;

 String strConn = connection.ToString();

 //create connection
  SqlConnection sqlConn = new SqlConnection(strConn);

//open connection
sqlConn.Open();

 //get databases
DataTable tblDatabases = sqlConn.GetSchema("Databases");

//close connection
sqlConn.Close();

//add to list
foreach (DataRow row in tblDatabases.Rows) {
      String strDatabaseName = row["database_name"].ToString();

       databases.Add(strDatabaseName);


}     

Answer 2

    using (var connection = new System.Data.SqlClient.SqlConnection("ConnectionString"))
    {
        connection.Open();
        var command = new System.Data.SqlClient.SqlCommand();
        command.Connection = connection;
        command.CommandType = CommandType.Text;
        command.CommandText = "SELECT name FROM master.sys.databases";

        var adapter = new System.Data.SqlClient.SqlDataAdapter(command);
        var dataset = new DataSet();
        adapter.Fill(dataset);
        DataTable dtDatabases = dataset.Tables[0];
    }