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Avro ADO.NET Provider
Rapidly create and deploy powerful .NET applications that integrate with Avro.
DataBind Avro Data to the DevExpress Data Grid
Use the CData ADO.NET Provider for Avro with the DevExpress Windows Forms and Web controls to provide Avro data to a chart.
The ADO.NET Provider for Avro 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.
Connect to your local Avro file(s) by setting the URI connection property to the location of the Avro file.Windows Forms Controls
The code below shows how to populate a DevExpress chart with Avro data. The AvroDataAdapter 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 (AvroConnection connection = new AvroConnection(
"URI=C:/folder/table.avroInitiateOAuth=GETANDREFRESH")) {
AvroDataAdapter dataAdapter = new AvroDataAdapter(
"SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = 'value_2'", 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[] { "Column1" });
series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
series.ArgumentDataMember = "Id";
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 Avro data. The AvroDataAdapter 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 (AvroConnection connection = new AvroConnection(
"URI=C:/folder/table.avroInitiateOAuth=GETANDREFRESH"))
{
AvroDataAdapter AvroDataAdapter1 = new AvroDataAdapter("SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = 'value_2'", connection);
DataTable table = new DataTable();
AvroDataAdapter1.Fill(table);
DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
WebChartControl1.Series.Add(series);
series.DataSource = table;
series.ValueDataMembers.AddRange(new string[] { "Column1" });
series.ArgumentScaleType = ScaleType.Qualitative;
series.ArgumentDataMember = "Id";
series.ValueScaleType = ScaleType.Numerical;
((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}
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