uac 提升，同时使用 ifileoperation copyitem

Question

我正在使用下面的代码在 Windows 7 中进行文件复制操作，但它不起作用并且在运行或调试时没有任何错误，当应用程序调用 CoGetObject 时它会崩溃并且无法返回任何 Hresult错误，我只知道错误发生在这一行 ->result := CoGetObject(pWideString(MonikerName), @BindOpts, ShlObj.IFileOperation, @iFileOperation); 任何人都可以在这段代码中找到任何问题？`

类型
  PBindOpts3 = ^TBindOpts3;
{$EXTERNALSYM tagBIND_OPTS3}
  tagBIND_OPTS3 = 记录
    cbStruct：双字；
    grfFlags：双字；
    grfMode：双字；
    dwTickCountDeadline: DWORD;
    dwTrackFlags：双字；
    dwClassContext: DWORD;
    语言环境：LCID；
    pServerInfo：指针； 
    hwnd: hwnd;
  结尾;
  TBindOpts3 = tagBIND_OPTS3;
{$EXTERNALSYM BIND_OPTS3}
  BIND_OPTS3 = TBindOpts3;


function CopyItem(const aSrcItem, aDest, aNewName: string): HResult;
常量
  CLSID_FileOp: TGUID = '{3ad05575-8857-4850-9277-11b85bdb8e09}';

无功
  lFileOperation：ShlObj.IFileOperation；
  psiFrom: IShellItem;
  psiTo: IShellItem;
  我的文件：文本文件；
  BindOpts：TBindOpts3；
  MonikerName：WideString；
  回复：HResult；

开始
  尝试

begin


结果:= CoInitialize(nil);
      如果成功（结果）那么
      开始

    ZeroMemory(@BindOpts, Sizeof(TBindOpts3));
    BindOpts.cbStruct := Sizeof(TBindOpts3);
    BindOpts.hwnd := 0;
    BindOpts.dwClassContext := CLSCTX_LOCAL_SERVER;

    MonikerName := 'Elevation:Administrator!new:' + GUIDToString
      (CLSID_FileOp);
    result := CoGetObject(pWideString(MonikerName), @BindOpts,
      ShlObj.IFileOperation, @lFileOperation);

    if Succeeded(result) then

      result := CoCreateInstance(CLSID_FileOp, nil,
        CLSCTX_LOCAL_SERVER + CLSCTX_INPROC_SERVER + CLSCTX_INPROC_HANDLER,
        IFileOperation, lFileOperation);
    if Succeeded(result) then
    begin
      result := lFileOperation.SetOperationFlags
        (FOFX_SHOWELEVATIONPROMPT + FOFX_NOCOPYHOOKS +
          FOFX_REQUIREELEVATION); 
      if Succeeded(result) then
      begin
        result := SHCreateItemFromParsingName
          (pchar(aSrcItem), nil, IShellItem, psiFrom);
        if Succeeded(result) then
        begin
          if aDest <> '' then
          begin

            result := SHCreateItemFromParsingName
              (pchar(aDest), nil, IShellItem, psiTo);
          end;

          if Succeeded(result) then
          begin

            result := lFileOperation.CopyItem
              (psiFrom, psiTo, pchar(aNewName), nil);

            psiTo := nil;
          end;

          psiFrom := nil;
        end;

        if Succeeded(result) then
        begin

          result := lFileOperation.PerformOperations;
        end;
      end;

      lFileOperation := nil;
    end;

    CoUninitialize;
  end;
end;


除了
    在 d: 例外做
    开始

 showmessage(d.tostring());
end;


结尾;

结尾;

`

Answer 1

HRESULTCoGetObject() 实际返回什么值？

调用 COM 函数时不要将 WideString 强制转换为 pWideString。按原样传递它，让 Delphi 为您处理编组细节。

并且在调用 CoGetObject() 之后不需要再调用 CoCreateInstance()。CoGetObject() 已经将所需的 COM 对象返回给您。按原样使用它。

尝试这个：

function CopyItem(const aSrcItem, aDest, aNewName: string): HResult;
const
  CLSID_FileOp: TGUID = '{3ad05575-8857-4850-9277-11b85bdb8e09}';
var
  lFileOperation: ShlObj.IFileOperation;
  psiFrom: IShellItem;
  psiTo: IShellItem;
  BindOpts: TBindOpts3;
  MonikerName: WideString;
begin
  try
    Result := CoInitialize(nil);
    OleCheck(Result);
    try
      ZeroMemory(@BindOpts, Sizeof(TBindOpts3)); 
      BindOpts.cbStruct := Sizeof(TBindOpts3); 
      BindOpts.hwnd := 0; 
      BindOpts.dwClassContext := CLSCTX_LOCAL_SERVER; 

      MonikerName := 'Elevation:Administrator!new:' + GUIDToString(CLSID_FileOp); 
      Result := CoGetObject(MonikerName, @BindOpts, ShlObj.IFileOperation, lFileOperation); 
      OleCheck(Result);

      Result := lFileOperation.SetOperationFlags(FOFX_SHOWELEVATIONPROMPT or FOFX_NOCOPYHOOKS or FOFX_REQUIREELEVATION);  
      OleCheck(Result);

      Result := SHCreateItemFromParsingName(PChar(aSrcItem), nil, IShellItem, psiFrom); 
      OleCheck(Result);

      if aDest <> '' then 
      begin 
        Result := SHCreateItemFromParsingName(PChar(aDest), nil, IShellItem, psiTo); 
        OleCheck(Result);
      end; 

      Result := lFileOperation.CopyItem(psiFrom, psiTo, PChar(aNewName), nil); 
      OleCheck(Result);

      Result := lFileOperation.PerformOperations;
      OleCheck(Result);
    finally 
      CoUninitialize; 
    end; 
  except
    on E: Exception do ShowMessage(d.ToString());
  end;
end;