Question

I try put the folder name in textbox so i’m used this code:

private: System::Void textBox1_DragEnter(System::Object^  sender, System::Windows::Forms::DragEventArgs^  e) {
             if (e->Data->GetDataPresent(DataFormats::FileDrop))
             {
                 e->Effect = DragDropEffects::Copy;
             }
         }
private: System::Void textBox1_DragDrop(System::Object^  sender, System::Windows::Forms::DragEventArgs^  e) {
             if (e->Data->GetDataPresent(DataFormats::FileDrop))
             {
                 textBox1->Text = Convert::ToString(e->Data->GetData(DataFormats::FileDrop));
             }
         }

It’s working (0 errors) but when i put folder into textbox, textbox show me not path but: System.String[]

I’m using: C++, .NET, Visual Studio 2010

Any ideas?

Answer 1

e->Data->GetData(DataFormats::FileDrop)

Is returning a string[] (an array of strings), not a single string. When you try to convert this to string using Convert::ToString, it just uses the default Object.ToString() behavior of showing the type name. What else would you expect it to do? There is no default notion of aggregating an array of strings into a single one.

You should use the object returned by GetData(), and convert it to a string yourself. If you expect a single item, test for that, grab the first item, and you have your string.

If you want to support many items, you can use string.Join() for example and specify a delimiter.

You should use this to get access to the dropped files data:

array<System::String^>^ items = (array<System::String^>^)e->Data->GetData(DataFormats::FileDrop);

From there you can decide how to convert items to a string.