When I Want to use OpenFileDialog in unity ,the Script can't Compile

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1

My code : 

using System.Windows.Forms; this is unity mono forms
  OpenFileDialog open = new OpenFileDialog();
  open.ShowDialog();

http://answers.unity3d.com/questions/7554/how-to-open-a-windows-file-open-or-save-dialog-without-crashing-unity

What's the error?

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i know, this issue was discussed a long time ago but i am struggling with the same problem at the moment. I have implemented the dialog as mentioned above and it works pretty well in the editor. but when i build a .exe, it does not work anymore... tried already 32bit and 64bit builds.. can someone help me please?!!

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5 Answers

5
6

Yet another alternative:

perfect solution. having no decent exposure to the native windows controls is just stupid. gkngkc's package solves this nicely

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3

Copy System.Windows.Forms.dll from Unity_Location\Editor\Data\Mono\lib\mono\2.0 to a Plugins folder in your project.

In your script :

using System.Runtime.InteropServices;

public class myClass{

  [DllImport("user32.dll")]
  private static extern void SaveFileDialog(); //in your case : OpenFileDialog

  private void myMethod()
  {
     System.Windows.Forms.SaveFileDialog sfd = new System.Windows.Forms.SaveFileDialog();

     //your code
  }
}

I dont have that folder anywhere in my computer. What should I do in that case then?

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will this work in Mac OS X and Linux?

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Worked perfectly for me, thanks! @mmangual_83, "Unity_Location" is usually "C:/Program Files/Unity" and the Plugins folder must be inside your project's Assets folder (you can create it if it doesn't exists). @ivanzinho, Yes, this should work on OSX, Linux and Windows since this DLL uses GTK# which is the same system used to render the unity editor UI.

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This works in the Editor, but when I build I get System.Windows.Forms.dll assembly is referenced by user code, but is not supported on StandaloneWindows64 platform. Various failures might follow. UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()

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Thank you! I tried this out myself, took a bit of figuring out but after taking bits of this code and taking the time to understand how to use DLLImport everything seems to be working. It took me a while since it works a bit different than usual, I've never had to use it until now. One question though, since you've helped me out with getting the System.Windows libraries working; do you know if it's possible to use System.Windows.Forms.Cursor.Position in Unity, as opposed to using Unity's Pointer Event Handler?

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2

use player setting .net not .net subset

4

The best thing to do is code a plugin that does this now that all versions of Unity support plugins. You can easily make this multi-platform for all computer OSes by using defines and setting the correct dll/bundle to load.

I’ve just made a plugin for OSX and it works great. Just make sure you build a universal bundle if you plan on making your game run on a 32bit machine.

How are you even able to make a working DLL interpreter for Mac (that fixes the actual problem) if the whole point in trying to do this is to accomplish something in a way Unity can't support.

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5

An alternative way: See my answer for Equivalent of OpenFilePanel without using UnityEditor? - Unity Answers