ADO.NET Provider for Email

Build 21.0.7930

Querying with the DataAdapter

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

Using the EmailDataAdapter

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 EmailDataAdapter is slower than the EmailDataReader because the Fill method needs to retrieve all data from the data source before returning.

The following example selects the From and Subject columns of the [INBOX] table:

C#

string connectionString = "Port=993;Server=imap.gmail.com;Password=password;User=user;Protocol=IMAP;SMTP Port=587;SMTP Server=smtp.gmail.com;";

using (EmailConnection connection = new EmailConnection(connectionString)) {
  EmailDataAdapter dataAdapter = new EmailDataAdapter(
  "SELECT From, Subject FROM [INBOX]", connection);

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

  Console.WriteLine("Contents of [INBOX].");

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

VB.NET

Dim connectionString As String = "Port=993;Server=imap.gmail.com;Password=password;User=user;Protocol=IMAP;SMTP Port=587;SMTP Server=smtp.gmail.com;"

Using connection As New EmailConnection(connectionString)
  Dim dataAdapter As New EmailDataAdapter("SELECT From, Subject FROM [INBOX]", connection)

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

  Console.WriteLine("Contents of [INBOX].")

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

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Build 21.0.7930