[C#] 如何选择一个目录 .Net教程-C#语言
基本思路是利用SHBrowseForFolder 于是有如下代码:
private enum BrowseFlag { BIF_RETURNONLYFSDIRS = 0x0001, // For finding a folder to start document searching BIF_DONTGOBELOWDOMAIN = 0x0002, // For starting the Find Computer BIF_STATUSTEXT = 0x0004, BIF_RETURNFSANCESTORS = 0x0008, BIF_EDITBOX = 0x0010, BIF_VALIDATE = 0x0020, // insist on valid result (or CANCEL)
BIF_BROWSEFORCOMPUTER = 0x1000, // Browsing for Computers. BIF_BROWSEFORPRINTER = 0x2000, // Browsing for Printers BIF_BROWSEINCLUDEFILES= 0x4000 // Browsing for Everything }
[StructLayout(LayoutKind.Sequential)] private struct BrowseInfo { public IntPtr hwndOwner; public IntPtr pidlRoot; [MarshalAs(UnmanagedType.LPTStr)] public string displayname; [MarshalAs(UnmanagedType.LPTStr)] public string title; public int flags; public IntPtr callback; public IntPtr lparam; }
[DllImport("shell32.dll", CharSet=CharSet.Auto)] static extern IntPtr SHBrowseForFolder(ref BrowseInfo info); [DllImport("shell32.dll", CharSet=CharSet.Auto)] [return : MarshalAs(UnmanagedType.Bool)] internal extern static bool SHGetPathFromIDList(IntPtr pidl, [MarshalAs(UnmanagedType.LPTStr)] System.Text.StringBuilder pszPath);
public static string BrowseFolder(IWin32Window owner) { BrowseInfo info = new BrowseInfo(); info.flags = (int)BrowseFlag.BIF_RETURNONLYFSDIRS + (int)BrowseFlag.BIF_STATUSTEXT + (int)BrowseFlag.BIF_VALIDATE; info.hwndOwner = owner.Handle; IntPtr pidlReturned = SHBrowseForFolder(ref info);
StringBuilder sb = new StringBuilder(260); SHGetPathFromIDList(pidlReturned, sb);
return sb.ToString(); }
这绝对是最简便的解决办法。虽然没有释放pidlReturned有可能造成少量内存泄漏,但是那么一点内存,谁在乎呢?
|