unity3d各种OpenFileDialog操作

1.编辑模式（Editor）下：

string path = EditorUtility.OpenFilePanel("Load png Textures of Directory", "", "");
WWW ww=new WWW("file:///"+path);
print(ww.url);
yield return ww;
gui.texture=ww.texture;

2.非编辑模式：

OpenFileDialog ofd = new OpenFileDialog();   //new一个方法ofd.InitialDirectory ="file://"+UnityEngine.Application.dataPath;  //定义打开的默认文件夹位置//定义打开的默认文件夹位置
if(ofd.ShowDialog()==DialogResult.OK)
{//显示打开文件的窗口Debug.Log( ofd.FileName);
}

以上操作需要添加 System.Windows.Forms.dll,放在Plugins文件夹下，同时需要更改.net 2.0 Subset为.net2.0

3、unity3d调用win32打开对话框

DllTestusing UnityEngine;
using System.Collections;
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);}
}

using UnityEngine;using System.Collections;using System.Text;using System.Runtime.InteropServices;using System;public class Test : MonoBehaviour {public GameObject plane;void OnGUI(){if(GUI.Button(new Rect(0,0,100,35),"OpenDialog")){OpenFileName ofn = new OpenFileName();ofn.structSize = Marshal.SizeOf(ofn);ofn.filter = "All Files\0*.*\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;//默认路径ofn.title = "Open Project";ofn.defExt = "JPG";//显示文件的类型//注意 一下项目不一定要全选 但是0x00000008项不要缺少ofn.flags=0x00080000|0x00001000|0x00000800|0x00000200|0x00000008;//OFN_EXPLORER|OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST| OFN_ALLOWMULTISELECT|OFN_NOCHANGEDIRif(DllTest.GetOpenFileName( ofn )){StartCoroutine(WaitLoad(ofn.file));//加载图片到panleDebug.Log( "Selected file with full path: {0}"+ofn.file );}}}IEnumerator WaitLoad(string fileName){WWW wwwTexture=new WWW("file://"+fileName);Debug.Log(wwwTexture.url);yield return wwwTexture;plane.renderer.material.mainTexture=wwwTexture.texture;}
}参考知识：1、http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.inattribute%28v=vs.85%292、http://msdn.microsoft.com/en-us/library/windows/desktop/ms646839%28v=vs.85%29.aspx3、C#和win32类型对应4、http://blog.csdn.net/wanfang323/article/details/6372995

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