开发中遇到客户需要自定义程序背景和背景音乐的，所以就有了需要打开对话框让客户自己去选择对应文件，程序只需要记录下来用户选择的路径就可以了。
引用Comdlg32.dll系统类库，GetOpenFileName方法，下面看代码，
public class OpenDialog
{
//链接指定系统函数 打开文件对话框
[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
public static bool GetOFN([In, Out] OpenFileName ofn)
{
return GetOpenFileName(ofn);
}
//链接指定系统函数 另存为对话框
[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetSaveFileName([In, Out] OpenFileName ofn);
public static bool GetSFN([In, Out] OpenFileName ofn)
{
return GetSaveFileName(ofn);
}
}
下面是OpenFileName脚本，
[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;
}
下面看调用方式，
public enum FileType
{
None,
Text,
Texture,
Video,
Music,
}
/// <summary>
/// 文件操作类工具
/// </summary>
public static class FileIOUtil
{
/// <summary>
/// 打开一个窗口选择一个文件
/// </summary>
/// <param name="fileType">需要选择的文件类型</param>
/// <param name="openPath">设置打开的默认路径</param>
/// <returns>返回选择文件的路径</returns>
public static string OpenFileDialog(FileType fileType, string openPath = null)
{
OpenFileName ofn = new OpenFileName();
ofn.structSize = Marshal.SizeOf(ofn);
string fliter = string.Empty;
switch (fileType)
{
case FileType.None:
fliter = "All Files(*.*)\0*.*\0\0";
break;
case FileType.Text:
fliter = "Text Files(*文本文件)\0*.txt\0";
break;
case FileType.Texture:
fliter = "Texure Files(*图片文件)\0*.png;*.jpg\0";
break;
case FileType.Video:
fliter = "Video Files(*视频文件)\0*.mp4;*.mov\0";
break;
case FileType.Music:
fliter = "Music Files(*音频文件)\0*.wav;*.mp3\0";
break;
}
ofn.filter = fliter;//设置需要选择的类型
ofn.file = new string(new char[256]);
ofn.maxFile = ofn.file.Length;
ofn.fileTitle = new string(new char[64]);
ofn.maxFileTitle = ofn.fileTitle.Length;
if (string.IsNullOrEmpty(openPath))
ofn.initialDir = System.Environment.CurrentDirectory; //打开的默认路径自行更改
else
ofn.initialDir = openPath;
ofn.title = "选择文件";//标题 自定义 自行更改
//0x00000200 设置用户可以选择多个文件 不使用 暂时没找到解析多个文件路径的解决方法
//具体含义查看给到的参考文献链接
ofn.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000008;
if (OpenDialog.GetOFN(ofn))
{
Debug.Log(ofn.file);
return ofn.file;
}
return null;
}
}
开发中遇到客户需要自定义程序背景和背景音乐的，所以就有了需要打开对话框让客户自己去选择对应文件，程序只需要记录下来用户选择的路径就可以了。