c++(/clr)非托管类型和托管类型互转

以下代码必须有“Common Language Runtime Support(/clr)” 和“MFC”支持

1. 字符窜之间的转换

 1 // 托管类型到非托管类型
 2  inline CString ManageToUnManageStr(System::String^ cmStr)
 3 {
 4     using namespace System::Runtime::InteropServices;
 5     CString cStr = (char*)(Marshal::StringToHGlobalAnsi(cmStr)).ToPointer();
 6     return cStr;
 7 }
 8 
 9  // 非托管类型到托管类型
10  inline System::String^ UnManageToManageStr(const CString& cStr)
11 {
12     const char* cc = (LPCTSTR)cStr;
13     System::String^ cmStr = gcnew System::String(cc);
14     return cmStr;
15 }

2. 对象之间的转换

 1 // _variant_t到Object对象
 2  inline System::Object^ VarToObject(_variant_t var)
 3 {
 4     using namespace System::Runtime::InteropServices;
 5     System::IntPtr^ pvar = gcnew System::IntPtr(&var);
 6     System::Object^ obj = Marshal::GetObjectForNativeVariant(*pvar);
 7     return obj;
 8 }
 9 
10  // Object对象到_variant_t
11  inline _variant_t* ObjectToVar(System::Object^ obj)
12 {
13     using namespace System::Runtime::InteropServices;
14     _variant_t* vt = new _variant_t();
15     System::IntPtr^ pvar = (gcnew System::IntPtr((void*)vt));
16     Marshal::GetNativeVariantForObject(obj,*pvar);
17     return vt;
18 }

更多：请参考.net库 System.Runtime.InteropServices 命名空间下的类，特别是 Marshal 类。