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DataBind Greenplum Data to the DevExpress Data Grid
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Greenplum ADO.NET Provider
Rapidly create and deploy powerful .NET applications that integrate with Greenplum databases.
Use the CData ADO.NET Provider for Greenplum with the DevExpress Windows Forms and Web controls to provide Greenplum data to a chart.
The CData ADO.NET Provider for Greenplum 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.
To connect to Greenplum, set the Server, Port (the default port is 5432), and Database connection properties and set the User and Password you wish to use to authenticate to the server. If the Database property is not specified, the default database for the authenticate user is used.
Windows Forms Controls
The code below shows how to populate a DevExpress chart with Greenplum data. The GreenplumDataAdapter 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 (GreenplumConnection connection = new GreenplumConnection(
"User=user;Password=admin;Database=dbname;Server=127.0.0.1;Port=5432;")) {
GreenplumDataAdapter dataAdapter = new GreenplumDataAdapter(
"SELECT Freight, ShipName 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[] { "ShipName" });
series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
series.ArgumentDataMember = "Freight";
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 Greenplum data. The GreenplumDataAdapter 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 (GreenplumConnection connection = new GreenplumConnection(
"User=user;Password=admin;Database=dbname;Server=127.0.0.1;Port=5432;"))
{
GreenplumDataAdapter GreenplumDataAdapter1 = new GreenplumDataAdapter("SELECT Freight, ShipName FROM Orders WHERE ShipCountry = USA", connection);
DataTable table = new DataTable();
GreenplumDataAdapter1.Fill(table);
DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
WebChartControl1.Series.Add(series);
series.DataSource = table;
series.ValueDataMembers.AddRange(new string[] { "ShipName" });
series.ArgumentScaleType = ScaleType.Qualitative;
series.ArgumentDataMember = "Freight";
series.ValueScaleType = ScaleType.Numerical;
((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}
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