标签： linq
2016-06-25 12:47 409人阅读 评论(0) 收藏 举报分类： LINQ（5）   我の原创（113）
版权声明：本文为博主原创文章，未经博主允许不得转载。LINQ中ForEach方法的使用。1、实例一：使用ForEach获取列表中的某个字段值[csharp] view plain copy 在CODE上查看代码片派生到我的代码片
/// <summary>
/// 使用ForEach获取列表中员工名称字段
/// </summary>
static void Main(string[] args)
{  List<Emplayee> emplayeeList = GetEmplayeeList();  //获取员工信息列表    string empNames = "";                             //员工名称字段  emplayeeList.ForEach(a => empNames += a.EmplayeeName + ",");  empNames = empNames.TrimEnd(',');  Console.WriteLine(empNames);                     //输出：张三,李四,王五
}
2、实例二：使用ForEach将部门列表与员工列表关联 [csharp] view plain copy 在CODE上查看代码片派生到我的代码片
/// <summary>
/// 使用ForEach将部门列表与员工列表关联
/// </summary>
public static void JoinDepartmentList()
{  List<Department> departmentList = GetDepartmentList();   //获取部门信息列表    List<Emplayee> emplayeeList = GetEmplayeeList();         //获取员工信息列表    departmentList.ForEach(a => a.EmplayeeList = emplayeeList.Where(e => e.DepartmentId == a.DepartmentId).ToList());  //使用ForEach输入结果  departmentList.ForEach(a => Console.WriteLine(String.Format("{0}:员工数量：{1}", a.DepartmentName, a.EmplayeeList.Count)));
}
其它代码：[csharp] view plain copy 在CODE上查看代码片派生到我的代码片
/// <summary>
/// 部门信息类
/// </summary>
public class Department
{  /// <summary>    /// 部门ID    /// </summary>    public int DepartmentId { get; set; }  /// <summary>    /// 部门名称    /// </summary>    public string DepartmentName { get; set; }  /// <summary>  /// 员工列表  /// </summary>  public List<Emplayee> EmplayeeList { get; set; }
}    /// <summary>
/// 员工信息类
/// </summary>
public class Emplayee
{  /// <summary>    /// 员工姓名    /// </summary>    public string EmplayeeName { get; set; }  /// <summary>    /// 部门ID    /// </summary>    public int DepartmentId { get; set; }
}
[csharp] view plain copy 在CODE上查看代码片派生到我的代码片
/// <summary>
/// 获取员工信息列表
/// </summary>
/// <returns></returns>
public static List<Emplayee> GetEmplayeeList()
{  List<Emplayee> emplayeeList = new List<Emplayee>();  Emplayee emplayee1 = new Emplayee() { EmplayeeName = "张三", DepartmentId = 1, };  Emplayee emplayee2 = new Emplayee() { EmplayeeName = "李四", DepartmentId = 2, };  Emplayee emplayee3 = new Emplayee() { EmplayeeName = "王五", DepartmentId = 2, };  emplayeeList.Add(emplayee1);  emplayeeList.Add(emplayee2);  emplayeeList.Add(emplayee3);  return emplayeeList;
}  /// <summary>
/// 获取部门信息列表
/// </summary>
/// <returns></returns>
public static List<Department> GetDepartmentList()
{  List<Department> departmentList = new List<Department>();  Department department1 = new Department() { DepartmentId = 1, DepartmentName = "研发部" };  Department department2 = new Department() { DepartmentId = 2, DepartmentName = "人事部" };  Department department3 = new Department() { DepartmentId = 3, DepartmentName = "财务部" };  departmentList.Add(department1);  departmentList.Add(department2);  departmentList.Add(department3);  return departmentList;
}  顶
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