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DataBind Twitter Data to the DevExpress Data Grid

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

The CData ADO.NET Provider for Twitter 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.

すべてのテーブルには認証が必要です。OAuth を使用してTwitter で認証する必要があります。OAuth では認証するユーザーにブラウザでTwitter との通信を要求します。詳しくは、OAuth 認証の使用 を参照してください。

Windows Forms Controls

The code below shows how to populate a DevExpress chart with Twitter data. The TwitterDataAdapter 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 (TwitterConnection connection = new TwitterConnection( "InitiateOAuth=True;")) { TwitterDataAdapter dataAdapter = new TwitterDataAdapter( "SELECT From_User_Name, Retweet_Count FROM Tweets", 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[] { "Retweet_Count" }); series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative; series.ArgumentDataMember = "From_User_Name"; 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 Twitter data. The TwitterDataAdapter 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 (TwitterConnection connection = new TwitterConnection( "")) { TwitterDataAdapter TwitterDataAdapter1 = new TwitterDataAdapter("SELECT From_User_Name, Retweet_Count FROM Tweets", connection); DataTable table = new DataTable(); TwitterDataAdapter1.Fill(table); DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar); WebChartControl1.Series.Add(series); series.DataSource = table; series.ValueDataMembers.AddRange(new string[] { "Retweet_Count" }); series.ArgumentScaleType = ScaleType.Qualitative; series.ArgumentDataMember = "From_User_Name"; series.ValueScaleType = ScaleType.Numerical; ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true; }
 
 
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