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用 [DllImport("shell32.dll", CharSet = CharSet.Unicode)]
public static extern Int32 SHFileOperation(ref SHFILEOPSTRUCT lpFileOp); // Address of an SHFILEOPSTRUCT structure that contains information

代码：
private void copy(string[] f1, string[] f2)
{
SHFILEOPSTRUCT FileOpStruct = new SHFILEOPSTRUCT();

uint FO_MOVE = 0x0001;
uint FO_COPY = 0x0002;
uint FO_DELETE = 0x0003;
uint FO_RENAME = 0x0004;

FileOpStruct.hwnd = IntPtr.Zero;
FileOpStruct.wFunc = FO_COPY;

String multiSource = StringArrayToMultiString(f1);
String multiDest = StringArrayToMultiString(f2);
FileOpStruct.pFrom = Marshal.StringToHGlobalUni(multiSource);
FileOpStruct.pTo = Marshal.StringToHGlobalUni(multiDest);
FileOpStruct.fFlags = (ushort)ShellFileOperationFlags.FOF_MULTIDESTFILES;

FileOpStruct.lpszProgressTitle = "aaaaaaaa";
FileOpStruct.fAnyOperationsAborted = 0;
FileOpStruct.hNameMappings = IntPtr.Zero;

int RetVal;
RetVal = SHFileOperation(ref FileOpStruct);

}

private String StringArrayToMultiString(String[] stringArray)
{
String multiString = "";

if (stringArray == null)
return "";

for (int i = 0; i < stringArray.Length; i++)
multiString += stringArray[i] + '/0';

multiString += '/0';

return multiString;
}

[DllImport("shell32.dll", CharSet = CharSet.Unicode)]
public static extern Int32 SHFileOperation(ref SHFILEOPSTRUCT lpFileOp); // Address of an SHFILEOPSTRUCT structure that contains information
public struct SHFILEOPSTRUCT
{
public IntPtr hwnd; // Window handle to the dialog box to display information about the
// status of the file operation.
public UInt32 wFunc; // Value that indicates which operation to perform.
public IntPtr pFrom; // Address of a buffer to specify one or more source file names.
// These names must be fully qualified paths. Standard Microsoft?
// MS-DOS?wild cards, such as "*", are permitted in the file-name
// position. Although this member is declared as a null-terminated
// string, it is used as a buffer to hold multiple file names. Each
// file name must be terminated by a single NULL character. An
// additional NULL character must be appended to the end of the
// final name to indicate the end of pFrom.
public IntPtr pTo; // Address of a buffer to contain the name of the destination file or
// directory. This parameter must be set to NULL if it is not used.
// Like pFrom, the pTo member is also a double-null terminated
// string and is handled in much the same way.
public UInt16 fFlags; // Flags that control the file operation.
public Int32 fAnyOperationsAborted; // Value that receives TRUE if the user aborted any file operations
// before they were completed, or FALSE otherwise.
public IntPtr hNameMappings; // A handle to a name mapping object containing the old and new
// names of the renamed files. This member is used only if the
// fFlags member includes the FOF_WANTMAPPINGHANDLE flag.
[MarshalAs(UnmanagedType.LPWStr)]
public String lpszProgressTitle; // Address of a string to use as the title of a progress dialog box.
// This member is used only if fFlags includes the
// FOF_SIMPLEPROGRESS flag.
}
public enum ShellFileOperationFlags
{
FOF_MULTIDESTFILES = 0x0001, // The pTo member specifies multiple destination files (one for
// each source file) rather than one directory where all source
// files are to be deposited.
FOF_CONFIRMMOUSE = 0x0002, // Not currently used.
FOF_SILENT = 0x0004, // Do not display a progress dialog box.
FOF_RENAMEONCOLLISION = 0x0008, // Give the file being operated on a new name in a move, copy, or
// rename operation if a file with the target name already exists.
FOF_NOCONFIRMATION = 0x0010, // Respond with "Yes to All" for any dialog box that is displayed.
FOF_WANTMAPPINGHANDLE = 0x0020, // If FOF_RENAMEONCOLLISION is specified and any files were renamed,
// assign a name mapping object containing their old and new names
// to the hNameMappings member.
FOF_ALLOWUNDO = 0x0040, // Preserve Undo information, if possible. If pFrom does not
// contain fully qualified path and file names, this flag is ignored.
FOF_FILESONLY = 0x0080, // Perform the operation on files only if a wildcard file
// name (*.*) is specified.
FOF_SIMPLEPROGRESS = 0x0100, // Display a progress dialog box but do not show the file names.
FOF_NOCONFIRMMKDIR = 0x0200, // Do not confirm the creation of a new directory if the operation
// requires one to be created.
FOF_NOERRORUI = 0x0400, // Do not display a user interface if an error occurs.
FOF_NOCOPYSECURITYATTRIBS = 0x0800, // Do not copy the security attributes of the file.
FOF_NORECURSION = 0x1000, // Only operate in the local directory. Don't operate recursively
// into subdirectories.
FOF_NO_CONNECTED_ELEMENTS = 0x2000, // Do not move connected files as a group. Only move the
// specified files.
FOF_WANTNUKEWARNING = 0x4000, // Send a warning if a file is being destroyed during a delete
// operation rather than recycled. This flag partially
// overrides FOF_NOCONFIRMATION.
FOF_NORECURSEREPARSE = 0x8000 // Treat reparse points as objects, not containers.

}