ADO.NET Provider for HDFS

Build 21.0.7930

Connecting from Code

The CData ADO.NET Provider for HDFS implements a standard DbConnection object in HDFSConnection. You can also use the HDFSConnectionStringBuilder to programmatically build, parse, and rebuild connection strings.

Creating Connection Objects

See Establishing a Connection for guides to defining the connection string and authenticating. Below is a typical invocation to create HDFSConnection objects.

C#

using (HDFSConnection connection =   
  new HDFSConnection("Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;"))  
{  
  connection.Open();  
}

VB.NET

Using connection As New HDFSConnection("Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;")
  connection.Open
End Using

Using HDFSConnectionStringBuilder

The following code example shows how to use an ADO.NET connection string builder to parse a connection string.

C#

HDFSConnectionStringBuilder builder =
  new HDFSConnectionStringBuilder("Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;");
  //Pass the connection string builder an existing connection string, and you can get and set any of the elements as strongly typed properties.
  builder.ConnectionString = "Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;";
  //Now that the connection string has been parsed,
  // you can work with individual items:
  builder.MyString = "new property";
  builder.MyBoolean = true;

  // You can refer to connection keys using strings, 
  // as well. 
  builder["Logfile"] = "test.log";
  builder["Verbosity"] = 5;

VB.NET

Dim builder As HDFSConnectionStringBuilder = New HDFSConnectionStringBuilder("Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;")
'Pass the connection string builder an existing connection string, and you can get and set any of the elements using strongly typed properties.
builder.ConnectionString = Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;"
'Now that the connection string has been parsed,
' you can work with individual items:
builder.MyString = "new property"
builder.MyBoolean = True
  
' You can refer to connection keys using strings, 
' as well. 
builder("Logfile") = "test.log"
builder("Verbosity") = 5

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