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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.

Oracle への接続には、PATH variable をアップデートして、ネイティブDLL が含まれるフォルダロケーションが含まれていることを確認します。ネイティブDLL は、インストールディレクトリのlib フォルダにあります。完了したら次のプロパティを設定します:

  • Port: Oracle データベースをホストしているサーバーに接続するポート。
  • User: Oracle データベースに接続するユーザーのID。
  • Password: Oracle データベースに接続するユーザーのパスワード。
  • Service Name: Oracle データベースのサービス名。

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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