ObservableCollection能通知他变化了也正是因为它实现了INotifyPropertyChanged接口，
在wpf项目中经常会遇到把List<T>转换为ObservableCollection<T>.
总结了一下几种方法:
首先有个 Employee实体类:
public class Employee { private string name; public string Name { get { return name; } set { name = value; } } private int age; public int Age { get { return age; } set { age = value; } } private string sex; public string Sex { get { return sex; } set { sex = value; } }
接着有一个返回值为List<Employee>类型的方法:
/// <summary> /// 填充一个List<Employee> /// </summary> /// <returns></returns> public List<Employee> GetEmployeeList() { List<Employee> list = new List<Employee> { new Employee{Name="张三",Age=19,Sex="男"}, new Employee{Name="李四",Age=20,Sex="男"}, new Employee{Name="小红",Age=18,Sex="女"}, }; return list; }
有一个只读的ObservableCollection<Employee>类型的属性：
private ObservableCollection<Employee> employeeList; public ObservableCollection<Employee> EmployeeList { get { if (employeeList == null) { employeeList = new ObservableCollection<Employee>(); } return employeeList; } }
集合类型属性设置为只读的好处这里不展开。
最后是调用GetEmployeeList方法获得一个List<Employee>的list,把这个list赋值给ObservableCollection<Employee>类型的集合属性:
List<Employee> list = GetEmployeeList(); if (list != null) { EmployeeList.Clear(); //方法一如果ObservableCollection集合是可读可写的(set) //EmployeeList = new ObservableCollection<Employee>(list); //错误:无法对属性或索引器“EmployeeList”赋值 -- 它是只读的 //方法二:遍历list添加到ObservableCollection集合 //foreach (Employee item in list) //{ // EmployeeList.Add(item); //} //方法三：方法二的简写 list.ForEach(p => EmployeeList.Add(p)); //遍历list添加到EmployeeList中 }
List<T>转换为ObservableCollection<T>
原文：http://www.cnblogs.com/527289276qq/p/4954394.html
