使用ifileoperation复制项时uac提升 [英] uac elevate while using ifileoperation copyitem

问题描述

我正在使用下面的代码在Windows 7中进行文件复制操作，但是它不起作用，并且在运行或调试时没有任何错误，当应用程序调用CoGetObject时，它将崩溃并且无法执行返回任何Hresult错误，我只知道此行中发生错误-> 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? `

I'm using below code to file copy operataion in windows seven,but it doesn't work and there is no any error while running or debugging,When the application goes to calling the CoGetObject it'll crash and can't returning any Hresult error,I just know the error occur in this line ->result := CoGetObject(pWideString(MonikerName), @BindOpts, ShlObj.IFileOperation, @iFileOperation); anyone can find any problem in this code? `

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}';

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;

var lFileOperation: ShlObj.IFileOperation; psiFrom: IShellItem; psiTo: IShellItem; myFile: TextFile; BindOpts: TBindOpts3; MonikerName: WideString; Res: HResult;

begin try

begin try

begin

结果:= CoInitialize(nil); 如果成功(结果)，则 开始

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;

除外 d:例外 开始

except on d: exception do begin

 showmessage(d.tostring());
end;

end;

end;

`

推荐答案

CoGetObject()实际返回什么HRESULT值?

What HRESULT value is CoGetObject() actually returning?

在调用COM函数时，请勿将WideString转换为pWideString.照原样传递它，让Delphi为您处理编组细节.

Do not cast a WideString to a pWideString when calling a COM function. Pass it in as-is and let Delphi handle the marshalling details for you.

并且在调用CoGetObject()之后无需调用CoCreateInstance(). CoGetObject()已将所需的COM对象返回给您.照原样使用.

And there is no need to call CoCreateInstance() after calling CoGetObject(). CoGetObject() already returns the required COM object to you. Use it as-is.

尝试一下:

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;

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