在列表框中显示向量元素 [英] show vector elements in listbox

问题描述

我想在列表框中的向量中显示元素。但是，我不断得到一个错误：错误C2664：'System :: Windows :: Forms :: ListBox :: ObjectCollection :: Add'：不能转换参数1从'std :: basic_string< _Elem，_Traits，_Alloc>到'System :: Object ^'

I would like to display the elements in a vector in a listbox. However, I'm constantly getting a error: error C2664: 'System::Windows::Forms::ListBox::ObjectCollection::Add' : cannot convert parameter 1 from 'std::basic_string<_Elem,_Traits,_Alloc>' to 'System::Object ^'

我在c ++ / cli中使用windows窗体。
这是代码：

I am using windows form in c++/cli. this is the code:

for (size_t z = 0; z < container.size(); z++){
        listBox_name->Items->Add(container[z]);
    }

推荐答案

您的向量是 std :: string 的向量。使用 marshal_as 将 std :: string 转换为托管 String ^ 托管列表框可以接受。

Based on the error message, your vector is a vector of std::string. Use marshal_as to convert the std::string to a managed String^ that the managed list box can accept.

for (size_t z = 0; z < container.size(); z++){
    listBox_name->Items->Add(marshal_as<String^>(container[z]));
}

如果你发现你做的很多， std :: string 为完全管理类型，例如 List< String ^> ^ 。

If you find you're doing this a lot, consider changing your vector of std::string to be a fully-managed type, such as List<String^>^.

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