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stringc++-climanaged-c++

System::String has no member Length in C++/CLI

I'm developing a DLL that connects C++ with C# code, using C++/CLI in Visual Studio 2017. For the project I enabled the complier option '/clr' in Project -> Properties -> General. I created a String^ variable that for which I would like to read its length, yet I am unable to do so, since the IntelliSense cannot find the property Length, while most of the other System::String functions are available, like Clone, Compare, CompareOrdinal etc.

In the pseudo-code example below, I would like to copy a String to a buffer, but truncate if its length exceeds some limit.

void copyToBuffer(String^ message, char* f_buffer)
{
   if(message->Length > some limit)
      truncate...

   copy to buffer...
}

The compilation fails because the compiler throws an error of class "System::String" has no member "Length", even though I can easily navigate to the Length property in the Object Browser.

Length is listed in the Object Browser

What's missing?

Solution

  • Change the project build property from "/permissive-" to "/permissive" After I did this in a test, the Length property appears useful.