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你好我试图在delphi xe4下编译firedac dll开发示例，它出现了以下错误

[dcc32 Error] Unit1.pas(61): E2010 Incompatible types: 'Cardinal' and 'Pointer'

我已经在代码中标记了错误的位置。

单元 1 是可执行文件。

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, uADStanIntf, uADStanOption, uADStanDef, uADPhysIntf,
  uADDatSManager, uADStanParam, uADDAptIntf, StdCtrls, Grids, DBGrids,
  DB, uADPhysManager, uADPhysMSAcc, uADGUIxFormsWait, uADCompGUIx, uADCompDataSet,
  uADCompClient, uADStanError, uADGUIxIntf, uADStanPool, uADStanAsync,
  uADDAptManager, uADPhysODBCBase;

type
  TShowDataProc = procedure (ACliHandle: LongWord); stdcall;
  TShutdownProc = procedure; stdcall;

  TForm1 = class(TForm)
    ADConnection1: TADConnection;
    ADQuery1: TADQuery;
    ADGUIxWaitCursor1: TADGUIxWaitCursor;
    ADPhysMSAccessDriverLink1: TADPhysMSAccessDriverLink;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    FhDll: THandle;
    FpShowData: TShowDataProc;
    FpShutdown: TShutdownProc;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses
  uADStanUtil;

procedure TForm1.Button1Click(Sender: TObject);
begin
  FhDll := LoadLibrary(PChar('Project2.dll'));
  if FhDll = 0 then
    raise Exception.Create(ADLastSystemErrorMsg);
  @FpShowData := GetProcAddress(FhDll, PChar('ShowData'));
  if not Assigned(FpShowData) then
    raise Exception.Create(ADLastSystemErrorMsg);
  @FpShutdown := GetProcAddress(FhDll, PChar('Shutdown'));
  if not Assigned(FpShutdown) then
    raise Exception.Create(ADLastSystemErrorMsg);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  FpShowData(ADConnection1.CliHandle);   << Error is here
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  FpShutdown();
  FreeLibrary(FhDll);
  FhDll := 0;
  @FpShowData := nil;
  @FpShutdown := nil;
end;

end.

Unit2是dll

unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, uADStanIntf, uADStanOption, uADStanDef, uADPhysIntf,
  uADDatSManager, uADStanParam, uADDAptIntf, Grids, DBGrids, DB,
  uADPhysManager, uADPhysMSAcc, uADGUIxFormsWait, uADCompGUIx, uADCompDataSet,
  uADCompClient, uADStanError, uADGUIxIntf, uADStanPool, uADStanAsync,
  uADDAptManager, uADPhysODBCBase;

type
  TForm2 = class(TForm)
    ADConnection1: TADConnection;
    ADQuery1: TADQuery;
    ADGUIxWaitCursor1: TADGUIxWaitCursor;
    ADPhysMSAccessDriverLink1: TADPhysMSAccessDriverLink;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
  public
    class procedure ShowData(ACliHandle: LongWord);
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

{ TForm2 }

class procedure TForm2.ShowData(ACliHandle: LongWord);
var
  oForm: TForm2;
begin
  oForm := TForm2.Create(Application);
  oForm.ADConnection1.SharedCliHandle := ACliHandle;  <<<<<<<<<Error Here
  oForm.ADConnection1.Connected := True;
  oForm.ADQuery1.Active := True;
  oForm.Show;
end;

end.
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1 回答 1

3

http://docs.embarcadero.com/products/rad_studio/firedac/frames.html?frmname=topic&frmfile=uADCompClient_TADCustomConnection_SharedCliHandle.html

如您所见，SharedCliHandle 是指针，因此示例可能很旧，您需要将 LongWord 更改为指针。为什么之前是 LongWord 和指针，现在我们只能猜测，我的猜测是我作为评论分享的。

于 2013-09-01T07:54:47.400 回答