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DataBind Google Contacts Data to the DevExpress Data Grid

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

The CData ADO.NET Provider for Google Contacts 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.

You can connect to Google APIs on behalf of individual users or on behalf of a domain. Google uses the OAuth authentication standard. See the "Getting Started" section of the help documentation for a guide.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with Google Contacts data. The GoogleContactsDataAdapter 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 (GoogleContactsConnection connection = new GoogleContactsConnection( "InitiateOAuth=GETANDREFRESH")) { GoogleContactsDataAdapter dataAdapter = new GoogleContactsDataAdapter( "SELECT Summary, StartDateTime FROM Friends", 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[] { "StartDateTime" }); series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative; series.ArgumentDataMember = "Summary"; 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 Google Contacts data. The GoogleContactsDataAdapter 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 (GoogleContactsConnection connection = new GoogleContactsConnection( "InitiateOAuth=GETANDREFRESH")) { GoogleContactsDataAdapter GoogleContactsDataAdapter1 = new GoogleContactsDataAdapter("SELECT Summary, StartDateTime FROM Friends", connection); DataTable table = new DataTable(); GoogleContactsDataAdapter1.Fill(table); DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar); WebChartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "StartDateTime" }); series.ArgumentScaleType = ScaleType.Qualitative; series.ArgumentDataMember = "Summary"; series.ValueScaleType = ScaleType.Numerical; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }