[This is preliminary documentation and is subject to change.]

Fired when the value monitored by Groups is about to change. The value visible is the old value.

Namespace:  Firefly.Box
Assembly:  Firefly.Box (in Firefly.Box.dll) Version: 3.4.23.6473 (3.4.23.6473)

Syntax

C#
public event Action Leave
Visual Basic (Declaration)
Public Event Leave As Action
Visual C++
public:
 event Action^ Leave {
	void add (Action^ value);
	void remove (Action^ value);
}

Examples

Groups
This example is in the form of Unit Tests. It references the NUnit framework. This framework can be downloaded from www.NUnit.org. For more information about unit testing visit: www.NUnit.org.
This example is based on test data. The code for the entities included in this test data can be found in the documentation of Entity
CopyC#
using System;
using System.Collections.Generic;
using System.Text;
using NUnit.Framework;
using Firefly.Box;
using Firefly.Box.Testing;

namespace TestFirefly.Box.Documentation
{
    [TestFixture]
    public class GroupsDemo
    {
        [Test]
        public void GroupsDemo1()
        {
            var employees = new Pubs.Employees();
            var jobs = new Pubs.Jobs();
            employees.InitializeWithTestData();
            jobs.InitializeWithTestData();

            var bp = new BusinessProcess()
            {
                From = employees
            };
            bp.Relations.Add(jobs, jobs.Id.IsEqualTo(employees.JobId));
            bp.OrderBy.Segments.Add(employees.JobId);
            bp.Where.Add(employees.JobId.IsLessOrEqualTo(5));

            var g = bp.Groups.Add(employees.JobId);

            string resultingReport = "";
            int numberOfEmployeesPerJob = 0;
            g.Enter += () =>
            {
                numberOfEmployeesPerJob = 0;
                resultingReport += jobs.Description.Value.Trim() + ":\n";
            };
            bp.LeaveRow += () =>
            {
                resultingReport += employees.LastName.Value.Trim() + "\n";
                numberOfEmployeesPerJob++;
            };
            g.Leave +=
                () =>
                resultingReport +=
                "Total for job " + jobs.Description.Value.Trim() + " - " + numberOfEmployeesPerJob + "\n";
            bp.Run();

            resultingReport.ShouldBe(
            "Chief Executive Officer:\n" +
            "Cramer\n" +
            "Total for job Chief Executive Officer - 1\n" +
            "Business Operations Manager:\n" +
            "Devon\n" +
            "Total for job Business Operations Manager - 1\n" +
            "Chief Financial Officier:\n" +
            "Chang\n" +
            "Total for job Chief Financial Officier - 1\n" +
            "Publisher:\n" +
            "Hernadez\n" +
            "Labrune\n" +
            "Lebihan\n" +
            "Pontes\n" +
            "Henriot\n" +
            "Muller\n" +
            "Ottlieb\n" +
            "Total for job Publisher - 7\n");

        }
    }
}

See Also