DataBind Trello Data to the DevExpress Data Grid

The ADO.NET Provider for Trello by CData incorporates conventional ADO.NET data access components compatible with third-party controls. You can adhere to the standard ADO.NET data binding procedures to establish two-way access to real-time data through UI controls. This article will demonstrate the utilization of CData components for data binding with DevExpress UI Controls (Windows Forms and Web controls), specifically binding to a chart that visualizes live data.

Trello uses token-based authentication to grant third-party applications access to their API. When a user has granted an application access to their data, the application is given a token that can be used to make requests to Trello's API.

Trello's API can be accessed in 2 different ways. The first is using Trello's own Authorization Route, and the second is using OAuth1.0.

• Authorization Route: At the moment of registration, Trello assigns an API key and Token to the account. See the Help documentation for information on how to connect via the Authorization route.
• OAuth Route: Similar to using Authorization, OAuth creates an Application Id and Secret when you create your account. See the Help documentation for information on how to to connect.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with Trello data. The TrelloDataAdapter 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 (TrelloConnection connection = new TrelloConnection(
"APIKey=myApiKey;Token=myGeneratedToken;InitiateOAuth=GETANDREFRESH;")) {
 TrelloDataAdapter dataAdapter = new TrelloDataAdapter(
 "SELECT BoardId, Name FROM Boards WHERE Name = 'Public Board'", 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[] { "Name" });
 series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
 series.ArgumentDataMember = "BoardId";
 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 Trello data. The TrelloDataAdapter 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 (TrelloConnection connection = new TrelloConnection(
"APIKey=myApiKey;Token=myGeneratedToken;InitiateOAuth=GETANDREFRESH;"))
{
 TrelloDataAdapter TrelloDataAdapter1 = new TrelloDataAdapter("SELECT BoardId, Name FROM Boards WHERE Name = 'Public Board'", connection);
 DataTable table = new DataTable();
 TrelloDataAdapter1.Fill(table);
 DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
 WebChartControl1.Series.Add(series);
 series.DataSource = table;
 series.ValueDataMembers.AddRange(new string[] { "Name" });
 series.ArgumentScaleType = ScaleType.Qualitative;
 series.ArgumentDataMember = "BoardId";
 series.ValueScaleType = ScaleType.Numerical;
 ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}