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Rapidly create and deploy powerful .NET applications that integrate with Oracle databases.

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DataBind Oracle Data to the DevExpress Data Grid


Use the CData ADO.NET Provider for Oracle with the DevExpress Windows Forms and Web controls to provide Oracle data to a chart.

The ADO.NET Provider for Oracle 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.

To connect to Oracle, you'll first need to update your PATH variable and ensure it contains a folder location that includes the native DLLs. The native DLLs can be found in the lib folder inside the installation directory. Once you've done this, set the following to connect:

  • Port: The port used to connect to the server hosting the Oracle database.
  • User: The user Id provided for authentication with the Oracle database.
  • Password: The password provided for authentication with the Oracle database.
  • Service Name: The service name of the Oracle database.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with Oracle data. The OracleOCIDataAdapter 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 (OracleOCIConnection connection = new OracleOCIConnection( "User=myuser;Password=mypassword;Server=localhost;Port=1521;")) { OracleOCIDataAdapter dataAdapter = new OracleOCIDataAdapter( "SELECT CompanyName, City 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[] { "City" }); series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative; series.ArgumentDataMember = "CompanyName"; 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 Oracle data. The OracleOCIDataAdapter 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 (OracleOCIConnection connection = new OracleOCIConnection( "User=myuser;Password=mypassword;Server=localhost;Port=1521;")) { OracleOCIDataAdapter OracleOCIDataAdapter1 = new OracleOCIDataAdapter("SELECT CompanyName, City FROM Customers WHERE Country = US", connection); DataTable table = new DataTable(); OracleOCIDataAdapter1.Fill(table); DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar); WebChartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "City" }); series.ArgumentScaleType = ScaleType.Qualitative; series.ArgumentDataMember = "CompanyName"; series.ValueScaleType = ScaleType.Numerical; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }