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DataBind IBM Cloud Data Engine Data to the DevExpress Data Grid
Use the CData ADO.NET Provider for IBM Cloud Data Engine with the DevExpress Windows Forms and Web controls to provide IBM Cloud Data Engine data to a chart.
The ADO.NET Provider for IBM Cloud Data Engine 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.
IBM Cloud Data Engine uses the OAuth and HMAC authentication standards. See the "Getting Started" chapter of the help documentation for a guide to using OAuth.
Windows Forms Controls
The code below shows how to populate a DevExpress chart with IBM Cloud Data Engine data. The IBMCloudDataEngineDataAdapter 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 (IBMCloudDataEngineConnection connection = new IBMCloudDataEngineConnection(
"Api Key=MyAPIKey;Instance CRN=myInstanceCRN;Region=myRegion;Schema=mySchema;OAuth Client Id=myOAuthClientId;OAuth Client Secret=myOAuthClientSecret;InitiateOAuth=GETANDREFRESH")) {
IBMCloudDataEngineDataAdapter dataAdapter = new IBMCloudDataEngineDataAdapter(
"SELECT Id, Status FROM Jobs WHERE UserId = [email protected]", 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[] { "Status" });
series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
series.ArgumentDataMember = "Id";
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 IBM Cloud Data Engine data. The IBMCloudDataEngineDataAdapter 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 (IBMCloudDataEngineConnection connection = new IBMCloudDataEngineConnection(
"Api Key=MyAPIKey;Instance CRN=myInstanceCRN;Region=myRegion;Schema=mySchema;OAuth Client Id=myOAuthClientId;OAuth Client Secret=myOAuthClientSecret;InitiateOAuth=GETANDREFRESH"))
{
IBMCloudDataEngineDataAdapter IBMCloudDataEngineDataAdapter1 = new IBMCloudDataEngineDataAdapter("SELECT Id, Status FROM Jobs WHERE UserId = [email protected]", connection);
DataTable table = new DataTable();
IBMCloudDataEngineDataAdapter1.Fill(table);
DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
WebChartControl1.Series.Add(series);
series.DataSource = table;
series.ValueDataMembers.AddRange(new string[] { "Status" });
series.ArgumentScaleType = ScaleType.Qualitative;
series.ArgumentDataMember = "Id";
series.ValueScaleType = ScaleType.Numerical;
((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}
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