DataBind HarperDB Data to the DevExpress Data Grid

The ADO.NET Provider for HarperDB 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.

Set the Server, User, and Password connection properties to connect to HarperDB. Set UseSSL to secure connections with TLS/SSL.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with HarperDB data. The HarperDBDataAdapter 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 (HarperDBConnection connection = new HarperDBConnection(
"Server=127.0.0.1;User=admin;Password=1234;")) {
  HarperDBDataAdapter dataAdapter = new HarperDBDataAdapter(
  "SELECT City, CompanyName FROM Customers WHERE Country = 'US'", 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[] { "CompanyName" });
  series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
  series.ArgumentDataMember = "City";
  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 HarperDB data. The HarperDBDataAdapter 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 (HarperDBConnection connection = new HarperDBConnection(
"Server=127.0.0.1;User=admin;Password=1234;"))
{
  HarperDBDataAdapter HarperDBDataAdapter1 = new HarperDBDataAdapter("SELECT City, CompanyName FROM Customers WHERE Country = 'US'", connection);
  DataTable table = new DataTable();
  HarperDBDataAdapter1.Fill(table);
  DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
  WebChartControl1.Series.Add(series);
  series.DataSource = table;
  series.ValueDataMembers.AddRange(new string[] { "CompanyName" });
  series.ArgumentScaleType = ScaleType.Qualitative;
  series.ArgumentDataMember = "City";
  series.ValueScaleType = ScaleType.Numerical;
  ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}