[英]How to pass to a Generic and Pass from a Generic to another class?
When I log into my application, I pass the cUserEntity
class which holds all the details of the logged in user, including UserID and Username, to the Dashboard form. 登录我的应用程序时,我将
cUserEntity
类传递到cUserEntity
该类包含已登录用户的所有详细信息,包括UserID和Username。 From here, I can continue to pass the details around from class to class and form to form. 从这里开始,我可以继续在每个班级和每个窗体之间传递详细信息。 For example (Ignore the generic bit in this example) :
例如(忽略此示例中的通用位) :
Login: 登录:
xamlDashboard Manager = new xamlDashboard(_loggedInUser);
Generic Gen = new Generic(_loggedInUser);
Manager.Show();
Dashboard: 仪表板:
cUserEntity _loggedInUser;
public xamlDashboard(cUserEntity loggedInUser)
{
InitializeComponent();
_loggedInUser = loggedInUser;
}
However, I have a Generic.Xaml
page which creates a button at the top of every window. 但是,我有一个
Generic.Xaml
页面,该页面在每个窗口的顶部创建一个按钮。 Behind the Generic.xaml
is a Generic class, which holds the click_event
for the created button. 后面
Generic.xaml
是一个通用类,其保持click_event
为创建的按钮。 The click_event
opens a new window to another form. click_event
将打开一个新窗口,可打开另一个表单。
Now, I need that other form to have the logged in user details, and to do that, I assume I need to pass to the Generic.Xaml
and then pass from there to the new form via the click_event
. 现在,我需要其他表单来具有已登录的用户详细信息,并且为此,我假定我需要传递给
Generic.Xaml
,然后通过click_event
从那里传递给新表单。 However, as I've read up and noticed, it doesn't seem to be possible as you can't pass a type to a Generic during runtime. 但是,正如我阅读并注意到的那样,这似乎是不可能的,因为您无法在运行时将类型传递给Generic。
What I hoped to achieved (which failed) : 我希望达到的目标(失败了) :
public partial class Generic
{
cUserEntity _loggedInUser;
public Generic(cUserEntity loggedInUser)
{
_loggedInUser = loggedInUser;
}
private void btnHelp_Click(object sender, RoutedEventArgs e)
{
xamlHelp help = new xamlHelp(_loggedInUser);
help.Show();
}
}
Therefore, what is the best and most efficient method to be able to do this, and would appreciate examples, if possible. 因此,什么是能够做到这一点的最好,最有效的方法,如果可能的话,我们将欣赏一些示例。
It would be alot simpler to create a singleton object to store your logged in user... 创建一个单例对象来存储您登录的用户会更简单...
public class UserAccount
{
private static User _currentUser;
private UserAccount() {}
public static User CurrentUser
{
set
{
_currentUser = value;
}
get
{
return _currentUser;
}
}
}
Then after login you would do this... 然后,登录后您将执行此操作...
// Set the current User
UserAccount.CurrentUser = user;
Then in any class you need the currently logged in user... you could do... 然后,在任何课程中,您都需要当前登录的用户...您可以这样做...
var user = UserAccount.CurrentUser;
Obviously you would need to implement your own business rules around this but the concept is what I am trying to get across here, a static single instance of the user that can be accessed from anywhere. 显然,您需要围绕此实现自己的业务规则,但是这个概念是我想要在此处介绍的内容,可以从任何地方访问该用户的静态单个实例。
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