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，当应用程序转到调用CoGetObject时它会崩溃而不能返回任何Hresult错误，我只知道此行中出现错误 - ＆gt; result := CoGetObject(pWideString(MonikerName), @BindOpts, ShlObj.IFileOperation, @iFileOperation); 任何人都可以在此代码中找到任何问题？ `

type
  PBindOpts3 = ^TBindOpts3;
{$EXTERNALSYM tagBIND_OPTS3}
  tagBIND_OPTS3 = record
    cbStruct: DWORD;
    grfFlags: DWORD;
    grfMode: DWORD;
    dwTickCountDeadline: DWORD;
    dwTrackFlags: DWORD;
    dwClassContext: DWORD;
    locale: LCID;
    pServerInfo: Pointer; 
    hwnd: hwnd;
  end;
  TBindOpts3 = tagBIND_OPTS3;
{$EXTERNALSYM BIND_OPTS3}
  BIND_OPTS3 = TBindOpts3;

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;
  myFile: TextFile;
  BindOpts: TBindOpts3;
  MonikerName: WideString;
  Res: HResult;

begin
  try

begin


result := CoInitialize(nil);
      if Succeeded(result) then
      begin

    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;


except
    on d: exception do
    begin

 showmessage(d.tostring());
end;


end;

end;

`

Answer 1

CoGetObject（）实际返回的HRESULT值是什么？

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

调用CoGetObject（）后无需调用CoCreateInstance（）。 CoGetObject（）已经返回了所需的COM对象。按原样使用。

试试这个：

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;

uac在使用ifileoperation copyitem时提升

1 个答案: