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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 CData ADO.NET Provider for Oracle 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 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; }
 
 
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