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DataBind HarperDB Data to the DevExpress Data Grid
Use the CData ADO.NET Provider for HarperDB with the DevExpress Windows Forms and Web controls to provide HarperDB data to a chart.
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;
}
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