Question

如果我输入一个字符串作为参数，以下函数效果很好，但我想提供一个字符串列表，即不提供一个项目的名称，例如“AccountTracker”，我可以提供多个项目名称，即“AccountTracker”，“GameX”，“HR1”。如何转换我的LINQ查询呢？

有以下关系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

将项目作为字符串列表发送，您可以使用包含方法，如下所示

[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;
}

或者你可以发送一个包含项目的字符串"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;
}

LINQ IQueryable与List <string>输入参数</string>

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