DataBind HDFS Data to the DevExpress Data Grid



Use the CData ADO.NET Provider for HDFS with the DevExpress Windows Forms and Web controls to provide HDFS data to a chart.

The ADO.NET Provider for HDFS by CData incorporates conventional ADO.NET data access components compatible with third-party controls. You can adhere to the standard ADO.NET data binding procedures to establish two-way access to real-time data through UI controls. This article will demonstrate the utilization of CData components for data binding with DevExpress UI Controls (Windows Forms and Web controls), specifically binding to a chart that visualizes live data.

In order to authenticate, set the following connection properties:

  • Host: Set this value to the host of your HDFS installation.
  • Port: Set this value to the port of your HDFS installation. Default port: 50070

Windows Forms Controls

The code below shows how to populate a DevExpress chart with HDFS data. The HDFSDataAdapter binds to the Series property of the chart control. The Diagram property of the control defines the x- and y-axes as the column names.

using (HDFSConnection connection = new HDFSConnection( "Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;User=root;")) { HDFSDataAdapter dataAdapter = new HDFSDataAdapter( "SELECT FileId, ChildrenNum FROM Files WHERE FileId = '119116'", connection); DataTable table = new DataTable(); dataAdapter.Fill(table); DevExpress.XtraCharts.Series series = new DevExpress.XtraCharts.Series(); chartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "ChildrenNum" }); series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative; series.ArgumentDataMember = "FileId"; series.ValueScaleType = DevExpress.XtraCharts.ScaleType.Numerical; chartControl1.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }

Web Controls

The code below shows how to populate a DevExpress Web control with HDFS data. The HDFSDataAdapter binds to the Series property of the chart; the Diagram property defines the x- and y-axes as the column names.

using DevExpress.XtraCharts; using (HDFSConnection connection = new HDFSConnection( "Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;User=root;")) { HDFSDataAdapter HDFSDataAdapter1 = new HDFSDataAdapter("SELECT FileId, ChildrenNum FROM Files WHERE FileId = '119116'", connection); DataTable table = new DataTable(); HDFSDataAdapter1.Fill(table); DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar); WebChartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "ChildrenNum" }); series.ArgumentScaleType = ScaleType.Qualitative; series.ArgumentDataMember = "FileId"; series.ValueScaleType = ScaleType.Numerical; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }

Ready to get started?

Download a free trial of the HDFS Data Provider to get started:

 Download Now

Learn more:

HDFS Icon HDFS ADO.NET Provider

Rapidly create and deploy powerful .NET applications that integrate with HDFS.