The CData ADO.NET Provider for Snowflake implements two ADO.NET interfaces you can use to retrieve data from Snowflake: SnowflakeDataAdapter and SnowflakeDataReader objects. Whereas SnowflakeDataAdapter objects retrieve a single result set of all the data that matches a query, SnowflakeDataReader objects fetch data in subset increments as needed.

Using the SnowflakeDataAdapter

Use the adapter's Fill method to retrieve data from the data source. An empty DataTable instance is passed as an argument to the Fill method. When the method returns, the DataTable instance is populated with the queried data. Note that the SnowflakeDataAdapter is slower than the SnowflakeDataReader because the Fill method needs to retrieve all data from the data source before returning.

The following example selects the Id and ProductName columns of the Products table:

C#

string connectionString = "url=https://myaccount.region.snowflakecomputing.com;user=Admin;password=test123;Database=Northwind;Warehouse=TestWarehouse;Account=Tester1;";

using (SnowflakeConnection connection = new SnowflakeConnection(connectionString)) {
  SnowflakeDataAdapter dataAdapter = new SnowflakeDataAdapter(
  "SELECT Id, ProductName FROM [DemoDB].[PUBLIC].Products", connection);

  DataTable table = new DataTable();
  dataAdapter.Fill(table);

  Console.WriteLine("Contents of Products.");

  foreach (DataRow row in table.Rows) {
    Console.WriteLine("{0}: {1}", row["Id"], row["ProductName"]);
  }
}

VB.NET

Dim connectionString As String = "url=https://myaccount.region.snowflakecomputing.com;user=Admin;password=test123;Database=Northwind;Warehouse=TestWarehouse;Account=Tester1;"

Using connection As New SnowflakeConnection(connectionString)
  Dim dataAdapter As New SnowflakeDataAdapter("SELECT Id, ProductName FROM [DemoDB].[PUBLIC].Products", connection)

  Dim table As New DataTable()
  dataAdapter.Fill(table)

  Console.WriteLine("Contents of Products.")

  For Each row As DataRow In table.Rows
    Console.WriteLine("{0}: {1}", row("Id"), row("ProductName"))
  Next
End Using