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DataBind HBase Data to the DevExpress Data Grid

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

The CData ADO.NET Provider for HBase implements standard ADO.NET data access components that can be used with third-party controls. The standard ADO.NET process for databinding can be followed to enable bidirectional access to live data from UI controls. In this article we show how to use the CData components to databind to the DevExpress Windows Forms and Web controls; you will databind to a chart that displays current data.

Set the Port and Server to connect to Apache HBase.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with HBase data. The ApacheHBaseDataAdapter 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 (ApacheHBaseConnection connection = new ApacheHBaseConnection( "Server=127.0.0.1;Port=8080;")) { ApacheHBaseDataAdapter dataAdapter = new ApacheHBaseDataAdapter( "SELECT SUM(CustomerName), Price FROM Customers GROUP BY Price", 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[] { "Price" }); series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative; series.ArgumentDataMember = "CustomerName"; 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 HBase data. The ApacheHBaseDataAdapter 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 (ApacheHBaseConnection connection = new ApacheHBaseConnection( "Server=127.0.0.1;Port=8080;")) { ApacheHBaseDataAdapter ApacheHBaseDataAdapter1 = new ApacheHBaseDataAdapter("SELECT SUM(CustomerName), Price FROM Customers GROUP BY Price", connection); DataTable table = new DataTable(); ApacheHBaseDataAdapter1.Fill(table); DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar); WebChartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "Price" }); series.ArgumentScaleType = ScaleType.Qualitative; series.ArgumentDataMember = "CustomerName"; series.ValueScaleType = ScaleType.Numerical; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }
 
 
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