公共代表和在父实例化中看不到的事件 [英] Public delegate & event not seen in parent instantiation
问题描述
我有一个UserControl的部分类，编码如下：
公共部分类登录：System.Windows.Controls.UserControl
{
public delegate void StartingLoginHandler（string message）;
public event StartingLoginHandler StartingLogin;
public Login（）
{
InitializeComponent（）;
}
protected void OnStartingLogin（string message）
{
if（StartingLogin！= null）
{
StartingLogin（消息）;
}
}
}
当我在父页面中实例化一个UserControl Login（）对象时。我是
无法看到附加到它的事件。它不会在
事件中给出任何Intellisense，如果我继续输入并输入如下：
oLogin.StartingLogin + = oLogin。 StartingLoginHandler（delegate_method）;
它不会编译;编译器只报告StartingLogin不存在。
请问解决方案或解决方法是什么？
-
Mike McAllister
I have a partial class of a UserControl coded as follows:
public partial class Login : System.Windows.Controls.UserControl
{
public delegate void StartingLoginHandler(string message);
public event StartingLoginHandler StartingLogin;
public Login()
{
InitializeComponent();
}
protected void OnStartingLogin(string message)
{
if (StartingLogin != null)
{
StartingLogin(message);
}
}
}
When I instantiate a UserControl Login() object in the parent page.xaml.cs I
cannot see the event to attach to it. It won''t give any Intellisense on the
event and if I just go ahead and type it in like:
oLogin.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
it won''t compile; compiler just reports StartingLogin doesn''t exist.
What is the solution or a work-around please?
--
Mike McAllister
推荐答案
" Mike McAllister" < mi ************ @ newsgroup.nospamwrote in message
news：95 ****************** **************** @ microsof t.com ...
Hi,
"Mike McAllister" <mi************@newsgroup.nospamwrote in message
news:95**********************************@microsof t.com...
当我实例化UserControl Login（）对象时父页面.xaml.cs
我
看不到附加到它的事件。它不会给
事件带来任何Intellisense
事件，如果我继续输入并输入如下：
oLogin.StartingLogin + = oLogin.StartingLoginHandler（delegate_method）;
它不会编译;编译器只报告StartingLogin不存在。
请问解决方案或解决方法是什么？
When I instantiate a UserControl Login() object in the parent page.xaml.cs
I
cannot see the event to attach to it. It won''t give any Intellisense on
the
event and if I just go ahead and type it in like:
oLogin.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
it won''t compile; compiler just reports StartingLogin doesn''t exist.
What is the solution or a work-around please?
当然无法看到它，因为它没有在UserControl中定义。
这是你应该的执行：
登录l = yourControl登录;
if（l！= null）
l.StartingLogin + = oLogin .StartingLoginHandler（delegate_method）;
else
抛出新的异常（不正确的控件类型）;
Of course it cannot be seen, as it''s not defined in UserControl.
This is what you should do:
Login l = yourControl as Login;
if ( l != null )
l.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
else
throw new Exception( "Incorrect control type");
l.StartingLogin现在显示在Intellisense中。但是，以下两行
行抛出编译错误：
l.StartingLogin + =
oLogin.StartingLoginHandler（delegate_method） ;
l.StartingLogin + = l.StartingLoginHandler（delegate_method）;
''System.Windows.Controls.UserControl''不包含
''StartingLoginHandler''
您有解决方案的建议吗？
-
Mike McAllister
Ignacio Machin（.NET / C＃MVP）"写道：
l.StartingLogin now shows in Intellisense. However, both the following two
lines throw compiler errors:
l.StartingLogin +=
oLogin.StartingLoginHandler(delegate_method);
l.StartingLogin += l.StartingLoginHandler(delegate_method);
''System.Windows.Controls.UserControl'' does not contain a definition for
''StartingLoginHandler''
Do you have any suggestions for a work-around, please?
--
Mike McAllister
"Ignacio Machin ( .NET/ C# MVP )" wrote:
" Mike McAllister" < mi ************ @ newsgroup.nospamwrote in message
news：95 ****************** **************** @ microsof t.com ...
Hi,
"Mike McAllister" <mi************@newsgroup.nospamwrote in message
news:95**********************************@microsof t.com...
当我实例化UserControl Login（）对象时父页面.xaml.cs
我
看不到附加到它的事件。它不会给
事件带来任何Intellisense
事件，如果我继续输入并输入如下：
oLogin.StartingLogin + = oLogin.StartingLoginHandler（delegate_method）;
它不会编译;编译器只报告StartingLogin不存在。
请问解决方案或解决方法是什么？
When I instantiate a UserControl Login() object in the parent page.xaml.cs
I
cannot see the event to attach to it. It won''t give any Intellisense on
the
event and if I just go ahead and type it in like:
oLogin.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
it won''t compile; compiler just reports StartingLogin doesn''t exist.
What is the solution or a work-around please?
当然无法看到它，因为它没有在UserControl中定义。
这是你应该的执行：
登录l = yourControl登录;
if（l！= null）
l.StartingLogin + = oLogin .StartingLoginHandler（delegate_method）;
else
抛出新的异常（不正确的控件类型）;
Of course it cannot be seen, as it''s not defined in UserControl.
This is what you should do:
Login l = yourControl as Login;
if ( l != null )
l.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
else
throw new Exception( "Incorrect control type");
" Mike McAllister" < mi ************ @ newsgroup.nospamwrote in message
新闻：C6 ****************** **************** @ microsof t.com ...
"Mike McAllister" <mi************@newsgroup.nospamwrote in message
news:C6**********************************@microsof t.com...
l.StartingLogin现在显示在Intellisense中。但是，以下两行
行抛出编译错误：
l.StartingLogin + =
oLogin.StartingLoginHandler（delegate_method） ;
l.StartingLogin + = l.StartingLoginHandler（delegate_method）;
''System.Windows.Controls.UserControl''不包含
''StartingLoginHandler''
您对解决方案有什么建议吗？
l.StartingLogin now shows in Intellisense. However, both the following two
lines throw compiler errors:
l.StartingLogin +=
oLogin.StartingLoginHandler(delegate_method);
l.StartingLogin += l.StartingLoginHandler(delegate_method);
''System.Windows.Controls.UserControl'' does not contain a definition for
''StartingLoginHandler''
Do you have any suggestions for a work-around, please?
将变量类型从UserControl更改为确切的派生类型，
以便能够使用其他方法/事件/属性。
Change the type of the variable from UserControl to the exact derived type,
to be able to use your additional methods/events/properties.
-
Mike McAllister
" Ignacio Machin（.NET / C＃ MVP）写道：
--
Mike McAllister
"Ignacio Machin ( .NET/ C# MVP )" wrote:
>
Mike McAllister < mi ************ @ newsgroup.nospamwrote in message
新闻：95 ********************** ************ @ microso ft.com ...
>Hi,
"Mike McAllister" <mi************@newsgroup.nospamwrote in message
news:95**********************************@microso ft.com...
当我在父
page.xaml.cs
我
看不到附加到它的事件。它不会给
事件带来任何Intellisense
事件，如果我继续输入并输入如下：
oLogin.StartingLogin + = oLogin.StartingLoginHandler（delegate_method）;
它不会编译;编译器只报告StartingLogin不存在。
请问解决方案或解决方法是什么？
When I instantiate a UserControl Login() object in the parent
page.xaml.cs
I
cannot see the event to attach to it. It won''t give any Intellisense on
the
event and if I just go ahead and type it in like:
oLogin.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
it won''t compile; compiler just reports StartingLogin doesn''t exist.
What is the solution or a work-around please?
当然无法看到它，因为它没有在UserControl中定义。
这是你应该做的：
登录l = yourControl as Login;
if（l！= null）
l.StartingLogin + = oLogin.StartingLoginHandler（delegate_method）;
抛出新的异常（" ;不正确的控件类型"）;
Of course it cannot be seen, as it''s not defined in UserControl.
This is what you should do:
Login l = yourControl as Login;
if ( l != null )
l.StartingLogin += oLogin.StartingLoginHandler(delegate_method);
else
throw new Exception( "Incorrect control type");
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