使用typeof对象转换类型为（表达式为type） [英] convert type with (expression as type) with typeof object

问题描述

我想通过用户控件中的代码删除用户控件的用户控件



，然后如果父亲是StackPanel我使用：

Hi,

I want to remove user control from it's parent by code inside the user control

,then if the parent is StackPanel i use:

(this.Parent as StackPanel).Children.Remove(this);

但是父母不仅仅用于StackPanel，所以我必须将as的转换类型设为动态，使用此代码

but the parent is not for StackPanel only, so i have to make type of conversion of "as" to be dynamic, by using this code

 Type parentType = this.Parent.GetType();
(this.Parent as parentType ).Children.Remove(this);

但这是错误：

but this is error :

Error	15	The type or namespace name 'parentType' could not be found (are you missing a using directive or an assembly reference?)

所以，是关闭/处置/删除用户控件的代码自己的任何解决方案吗？





谢谢。

so, is it any solution to close/dispose/remove the usercontrol from it's code self?


Thank you.

推荐答案

StackPanel panel = this.Parent as StackPanel;
if (panel != null) {
   panel.Children.Remove(this);
}

应该这样做。

should do it.

鉴于您的层次结构，您必须编写转换运算符。



查看以下示例代码：



第1类：

公共课obj1

{

公共字符串a;



public void test1（）

{

}

}





Class 2：

公共课obj2

{

公共字符串b;



public void test2（）

{

}



public static explicit operator obj2（obj1 b）

{

返回新的obj2

{

b = ba

};

}

}



转换：

obj1 o1 =新obj1（）;

o1.a =new_tex t;

obj2 o2 =（obj2）o1; //将obj1类型的对象转换为obj2







检查您是否能够对此进行类型转换.Parentto ParentType

Given your hierarchy, you will have to write a conversion operator.

check below sample code:

Class 1:
public class obj1
{
public string a;

public void test1()
{
}
}


Class 2:
public class obj2
{
public string b;

public void test2()
{
}

public static explicit operator obj2(obj1 b)
{
return new obj2
{
b = b.a
};
}
}

CONVERSION:
obj1 o1 = new obj1();
o1.a = "new_text";
obj2 o2 = (obj2)o1; //converting object of type obj1 to obj2



Check if you are able to typecast "this.Parent" to ParentType

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