DataBind Cosmos DB Data to the DevExpress Data Grid

The ADO.NET Provider for Cosmos DB 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.

To obtain the connection string needed to connect to a Cosmos DB account using the SQL API, log in to the Azure Portal, select Azure Cosmos DB, and select your account. In the Settings section, click Connection String and set the following values:

• AccountEndpoint: The Cosmos DB account URL from the Keys blade of the Cosmos DB account
• AccountKey: In the Azure portal, navigate to the Cosmos DB service and select your Azure Cosmos DB account. From the resource menu, go to the Keys page. Find the PRIMARY KEY value and set AccountKey to this value.

Windows Forms Controls

The code below shows how to populate a DevExpress chart with Cosmos DB data. The CosmosDBDataAdapter 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 (CosmosDBConnection connection = new CosmosDBConnection(
"AccountEndpoint=myAccountEndpoint;AccountKey=myAccountKey;")) {
 CosmosDBDataAdapter dataAdapter = new CosmosDBDataAdapter(
 "SELECT City, CompanyName FROM Customers", 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[] { "CompanyName" });
 series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
 series.ArgumentDataMember = "City";
 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 Cosmos DB data. The CosmosDBDataAdapter 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 (CosmosDBConnection connection = new CosmosDBConnection(
"AccountEndpoint=myAccountEndpoint;AccountKey=myAccountKey;"))
{
 CosmosDBDataAdapter CosmosDBDataAdapter1 = new CosmosDBDataAdapter("SELECT City, CompanyName FROM Customers", connection);
 DataTable table = new DataTable();
 CosmosDBDataAdapter1.Fill(table);
 DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
 WebChartControl1.Series.Add(series);
 series.DataSource = table;
 series.ValueDataMembers.AddRange(new string[] { "CompanyName" });
 series.ArgumentScaleType = ScaleType.Qualitative;
 series.ArgumentDataMember = "City";
 series.ValueScaleType = ScaleType.Numerical;
 ((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}