使用 List< >.FindIndex 找到要刪除的ListItem (多個查詢條件 )
問題：
要刪除List<>中特定的一筆資料(有多個查詢條件)
解法：
-
使用List<>.FIndIndex取得項目編號
-
再用List<>.RemoveAt(index)將資料刪除
KeyPoint：
List<>.FIndIndex( delegate() )
//定義員工資料型態
public class Employee
{
private string _Id;
public string Id
{
get { return _Id; }
set { _Id = value; }
}
private string _Phone;
public string Phone
{
get { return _Phone; }
set { _Phone = value; }
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (this.IsPostBack)
return;
//建立員工清單
List<Employee> Employees = new List<Employee>();
Employees.Add(new Employee { Id = "1", Phone = "07-111-1111" });
Employees.Add(new Employee { Id = "1", Phone = "0911-111-111" });
Employees.Add(new Employee { Id = "2", Phone = "0911-111-111" });
//刪除 Id= "1" Phone= "0911-111-111" 的那一筆資料
Employee delData = new Employee { Id = "1", Phone = "0911-111-111" };
RemovieList(delData, Employees);
}
private static void RemovieList(Employee delData, List<Employee> Employees)
{
//找出要刪除資料再List中的index
int index = Employees.FindIndex(delegate(Employee _Employee)
{
//刪除條件
if (_Employee.Id != delData.Id)
return false;
if (_Employee.Phone != delData.Phone)
return false;
return true;
});
//刪除資料
Employees.RemoveAt(index);
}