Question

The following function works great if I enter one string as a parameter, but I would like to supply it a list of strings, i.e. instead of supplying it the name of one project, e.g. “AccountTracker”, I can supply it multiple project names, i.e. “AccountTracker”, “GameX”, “HR1”. How can I convert my LINQ query to do so?

There is the following relationship Employee(1–)EmployeeProjects(–1)Project

[WebGet]
public IQueryable<Employee> GetEmployeesByProjects(string project)
{
   var employees = from ep in CurrentDataSource.EmployeeProjects
          .Include("Project")
          .Include("Employee")
       where ep.Project.ProjectName == project
       select ep.Employee;
   return employees;
}

Answer 1

send the projects as string list and you can use Contains method as below

[WebGet]
public IQueryable<Employee> GetEmployeesByProjects(List<string> projects)
{
   var employees = from ep in CurrentDataSource.EmployeeProjects
          .Include("Project")
          .Include("Employee")
       where projects.Contains(ep.Project.ProjectName)
       select ep.Employee;
   return employees;
}

or you can send one string with projects as "AccountTracker,GameX,HR1"

[WebGet]
public IQueryable<Employee> GetEmployeesByProjects(string listofprojects)
{
   string[] projects= listofprojects.Split(',');
   var employees = from ep in CurrentDataSource.EmployeeProjects
          .Include("Project")
          .Include("Employee")
       where projects.Contains(ep.Project.ProjectName)
       select ep.Employee;
   return employees;
}