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DataBind LDAP Objects to the DevExpress Data Grid
Use the CData ADO.NET Provider for LDAP with the DevExpress Windows Forms and Web controls to provide LDAP objects to a chart.
The ADO.NET Provider for LDAP 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 establish a connection, the following properties under the Authentication section must be provided:
- Valid User and Password credentials (e.g., Domain\BobF or cn=Bob F,ou=Employees,dc=Domain).
- Server information, including the IP or host name of the Server, as well as the Port.
BaseDN: This will limit the scope of LDAP searches to the height of the distinguished name provided.
Note: Specifying a narrow BaseDN may greatly increase performance; for example, cn=users,dc=domain will only return results contained within cn=users and its children.
Windows Forms Controls
The code below shows how to populate a DevExpress chart with LDAP objects. The LDAPDataAdapter 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 (LDAPConnection connection = new LDAPConnection(
"User=Domain\BobF;Password=bob123456;Server=10.0.1.1;Port=389;")) {
LDAPDataAdapter dataAdapter = new LDAPDataAdapter(
"SELECT Id, LogonCount FROM User", 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[] { "LogonCount" });
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 LDAP objects. The LDAPDataAdapter 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 (LDAPConnection connection = new LDAPConnection(
"User=Domain\BobF;Password=bob123456;Server=10.0.1.1;Port=389;"))
{
LDAPDataAdapter LDAPDataAdapter1 = new LDAPDataAdapter("SELECT Id, LogonCount FROM User", connection);
DataTable table = new DataTable();
LDAPDataAdapter1.Fill(table);
DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
WebChartControl1.Series.Add(series);
series.DataSource = table;
series.ValueDataMembers.AddRange(new string[] { "LogonCount" });
series.ArgumentScaleType = ScaleType.Qualitative;
series.ArgumentDataMember = "Id";
series.ValueScaleType = ScaleType.Numerical;
((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}
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