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DataBind Kafka Data to the DevExpress Data Grid
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Apache Kafka ADO.NET Provider
Rapidly create and deploy powerful .NET applications that integrate with Apache Kafka.
Use the CData ADO.NET Provider for Kafka with the DevExpress Windows Forms and Web controls to provide Kafka data to a chart.
The CData ADO.NET Provider for Kafka 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.
Set BootstrapServers and the Topic properties to specify the address of your Apache Kafka server, as well as the topic you would like to interact with.
Authorization Mechanisms
- SASL Plain: The User and Password properties should be specified. AuthScheme should be set to 'Plain'.
- SASL SSL: The User and Password properties should be specified. AuthScheme should be set to 'Scram'. UseSSL should be set to true.
- SSL: The SSLCert and SSLCertPassword properties should be specified. UseSSL should be set to true.
- Kerberos: The User and Password properties should be specified. AuthScheme should be set to 'Kerberos'.
You may be required to trust the server certificate. In such cases, specify the TrustStorePath and the TrustStorePassword if necessary.
Windows Forms Controls
The code below shows how to populate a DevExpress chart with Kafka data. The ApacheKafkaDataAdapter 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 (ApacheKafkaConnection connection = new ApacheKafkaConnection(
"User=admin;Password=pass;BootStrapServers=https://localhost:9091;Topic=MyTopic;")) {
ApacheKafkaDataAdapter dataAdapter = new ApacheKafkaDataAdapter(
"SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = '100'", 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 Kafka data. The ApacheKafkaDataAdapter 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 (ApacheKafkaConnection connection = new ApacheKafkaConnection(
"User=admin;Password=pass;BootStrapServers=https://localhost:9091;Topic=MyTopic;"))
{
ApacheKafkaDataAdapter ApacheKafkaDataAdapter1 = new ApacheKafkaDataAdapter("SELECT Id, Column1 FROM SampleTable_1 WHERE Column2 = '100'", connection);
DataTable table = new DataTable();
ApacheKafkaDataAdapter1.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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