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DataBind E*TRADE Data to the DevExpress Data Grid

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

The CData ADO.NET Provider for E*TRADE 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.

E*TRADE uses the OAuth authentication standard. You can use the embedded OAuth credentials or you can obtain your own by registering an app with E*TRADE. In addition to the OAuth values, you will need to specify the AccountId. 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 E*TRADE data. The EtradeDataAdapter 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 (EtradeConnection connection = new EtradeConnection( "AccountId=MyAccountId;InitiateOAuth=GETANDREFRESH")) { EtradeDataAdapter dataAdapter = new EtradeDataAdapter( "SELECT AccountDesc, NetAccountValue FROM AccountList", 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[] { "NetAccountValue" }); series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative; series.ArgumentDataMember = "AccountDesc"; 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 E*TRADE data. The EtradeDataAdapter 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 (EtradeConnection connection = new EtradeConnection( "AccountId=MyAccountId;InitiateOAuth=GETANDREFRESH")) { EtradeDataAdapter EtradeDataAdapter1 = new EtradeDataAdapter("SELECT AccountDesc, NetAccountValue FROM AccountList", connection); DataTable table = new DataTable(); EtradeDataAdapter1.Fill(table); DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar); WebChartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "NetAccountValue" }); series.ArgumentScaleType = ScaleType.Qualitative; series.ArgumentDataMember = "AccountDesc"; series.ValueScaleType = ScaleType.Numerical; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }