DataBind CockroachDB Data to the DevExpress Data Grid

The ADO.NET Provider for CockroachDB 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 following to connect to CockroachDB.

• Server: The host name or IP address of the server.
• Port: The port number of the CockroachDB server. If not specified, the default port is 26257.
• Database: The name of the Cockroach database. If not specified, you connect to the user's default database.
• User: The Cockroach DB user account used to authenticate.
• Password: The password used to authenticate the user.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with CockroachDB data. The CockroachDBDataAdapter 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 (CockroachDBConnection connection = new CockroachDBConnection(
"User=root;Password=root;Database=system;Server=localhost;Port=26257")) {
  CockroachDBDataAdapter dataAdapter = new CockroachDBDataAdapter(
  "SELECT ShipName, ShipCity FROM Orders WHERE ShipCountry = 'USA'", 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[] { "ShipCity" });
  series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
  series.ArgumentDataMember = "ShipName";
  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 CockroachDB data. The CockroachDBDataAdapter 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 (CockroachDBConnection connection = new CockroachDBConnection(
"User=root;Password=root;Database=system;Server=localhost;Port=26257"))
{
  CockroachDBDataAdapter CockroachDBDataAdapter1 = new CockroachDBDataAdapter("SELECT ShipName, ShipCity FROM Orders WHERE ShipCountry = 'USA'", connection);
  DataTable table = new DataTable();
  CockroachDBDataAdapter1.Fill(table);
  DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
  WebChartControl1.Series.Add(series);
  series.DataSource = table;
  series.ValueDataMembers.AddRange(new string[] { "ShipCity" });
  series.ArgumentScaleType = ScaleType.Qualitative;
  series.ArgumentDataMember = "ShipName";
  series.ValueScaleType = ScaleType.Numerical;
  ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}