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