如何使用Apache POI从MS word文档的文本框中获取文本？(How to get text from textbox of MS word document using Apache POI?)

 
 
 第一个问题：我需要声明存储在MyType中的类型的新变量。 
 
 
 基本上，你不能这样做。 
 
 编译时需要知道变量类型。 您不能使用仅在执行时知道的类型声明变量。 您可以通过泛型获得一些方法： 
 
public class Foo<T>
{
    private T value;
}
 
 你甚至可以添加一个约束来要求T有一个无参数的构造函数，然后你可以调用它： 
 
public class Foo<T> : new()
{
    private T value = new T();
}
 
 ...并且您可以在使用反射仅知道执行时的T类型时创建Foo<T> ： 
 
Type genericDefinition = typeof(Foo<>);
Type constructed = genericDefinition.MakeGenericType(A.MyType);
object instance = Activator.CreateInstance(constructed);
 
 ...但它会很快变得凌乱。 你没有告诉我们你想要实现什么，所以很难提出另一种选择 - 但如果你可以重新设计以避免这种情况，我会这样做。 
 
 
 
 第二个问题：我需要一个函数来表明是否可以将'Type' 
 
 
 您可能正在寻找Type.IsAssignableFrom ，但目前还不清楚...... 

 
 
First problem: I need declare new variable with type stored in MyType.
 
 
You can't do this, basically.
 
Variable types need to be known at compile-time. You can't declare a variable using a type which is only known at execution time. You can get some of the way there using generics:
 
public class Foo<T>
{
    private T value;
}
 
You can even add a constraint to require that T has a parameterless constructor which you can then call:
 
public class Foo<T> : new()
{
    private T value = new T();
}
 
... and you could create a Foo<T> when you only know the type of T at execution time using reflection:
 
Type genericDefinition = typeof(Foo<>);
Type constructed = genericDefinition.MakeGenericType(A.MyType);
object instance = Activator.CreateInstance(constructed);
 
... but it will get messy pretty quickly. You haven't told us anything about what you're actually trying to achieve, so it's hard to suggest an alternative - but if you can possibly redesign to avoid this, I would.
 
 
 
Second problem: I need a function that indicates whether reducible to each other variables of the 'Type'
 
 
It's possible that you're looking for Type.IsAssignableFrom, but it's not clear...