ADO.NET Provider for Bugzilla

Build 21.0.7930

Querying with the DataReader

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

Using the BugzillaDataReader

The BugzillaDataReader retrieves data faster than the BugzillaDataAdapter because it can retrieve data in pages. As you read data from the BugzillaDataReader, it periodically requests the next page of results from the data source, if required. This causes results to be returned at a faster rate. The following example selects all the columns from the SampleTable_1 table:

C#

string connectionString = " Url=http://<yourdomainname>/Bugzilla;APIKey=abc123;";

using (BugzillaConnection connection = new BugzillaConnection(connectionString)) {
  BugzillaCommand cmd = new BugzillaCommand("SELECT * FROM SampleTable_1", connection);
  
  BugzillaDataReader rdr = cmd.ExecuteReader();

  while (rdr.Read()) {
    Console.WriteLine(String.Format("\t{0} --> \t\t{1}", rdr["Id"], rdr["Column1"]));
  }
}

VB.NET

Dim connectionString As String = " Url=http://<yourdomainname>/Bugzilla;APIKey=abc123;"

Using connection As New BugzillaConnection(connectionString)
  Dim cmd As New BugzillaCommand("SELECT * FROM SampleTable_1", connection)

  Dim rdr As BugzillaDataReader = cmd.ExecuteReader()

  While rdr.Read()
    Console.WriteLine([String].Format(vbTab & "{0} --> " & vbTab & vbTab & "{1}", rdr("Id"), rdr("Column1")))
  End While
End Using

Copyright (c) 2021 CData Software, Inc. - All rights reserved.
Build 21.0.7930