C# Unity Script (but excluding any project namespace) for showing a file dialog in Unity for selecting a .Sch train schedule file name – source taken from various websites but linked it together for a working script example here. Acknowledging Astiolo.
using UnityEngine; using UnityEngine.SceneManagement; using UnityEngine.UI; using System; using System.Runtime.InteropServices; [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class OpenFileName { public int structSize = 0; public IntPtr dlgOwner = IntPtr.Zero; public IntPtr instance = IntPtr.Zero; public String filter = null; public String customFilter = null; public int maxCustFilter = 0; public int filterIndex = 0; public String file = null; public int maxFile = 0; public String fileTitle = null; public int maxFileTitle = 0; public String initialDir = null; public String title = null; public int flags = 0; public short fileOffset = 0; public short fileExtension = 0; public String defExt = null; public IntPtr custData = IntPtr.Zero; public IntPtr hook = IntPtr.Zero; public String templateName = null; public IntPtr reservedPtr = IntPtr.Zero; public int reservedInt = 0; public int flagsEx = 0; } public class DllTest { [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)] public static extern bool GetOpenFileName([In, Out] OpenFileName ofn); public static bool GetOpenFileName1([In, Out] OpenFileName ofn) { return GetOpenFileName(ofn); } } public class TimerClock : MonoBehaviour { void Start () { OpenFileName ofn = new OpenFileName(); ofn.structSize = Marshal.SizeOf(ofn); ofn.filter = "Train Sch Files\0*.sch\0\0"; ofn.file = new string(new char[256]); ofn.maxFile = ofn.file.Length; ofn.fileTitle = new string(new char[64]); ofn.maxFileTitle = ofn.fileTitle.Length; ofn.initialDir = UnityEngine.Application.dataPath; ofn.title = "Upload Train Schedule"; ofn.defExt = "SCH"; ofn.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;//OFN_EXPLORER|OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST| OFN_ALLOWMULTISELECT|OFN_NOCHANGEDIR if(DllTest.GetOpenFileName(ofn)) { Debug.Log( "Selected file with full path: {0}"+ofn.file ); } } void Update () { } }