一位朋友,.NET(C#)DLL问我写在C#中的DLL文件Delphi应用程序。他想使用这个函数decleration与它沟通:写作Delphi应用程序
function OpenAddOnFile(const mafCode: PWideChar; const mafFilePath: PWideChar;
const mafVersion: PWideChar): Pointer; stdcall;
我遇到的问题是它翻译成C#。可等PWideChar心不是...我已经尝试过这样的:
public Pointer OpenAddOnFile(
[MarshalAs(UnmanagedType.LPWStr)]string mafcode,
[MarshalAs(UnmanagedType.LPWStr)]string maffilepath,
[MarshalAs(UnmanagedType.LPWStr)]string mafversion
)
但它不工作现在:)
进一步我怎么能在C#中返回一个指针,以我的形式?
有人可以帮我吗? 在此先感谢!
编辑:\
他给了我这个额外的代码: 我问他对于函数调用,他给了我一个信息:
unit unAddOn;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
Vcl.ComCtrls;
function LoadAddOnFile(aPath: String; aVersion: String; var aFilePath: String;
var aCode: String): Boolean;
const
AddOnExt: String = '.maf';
implementation
function LoadAddOnFile(aPath: String; aVersion: String; var aFilePath: String;
var aCode: String): Boolean;
type
TOpenAddOnFile = function(const mafCode: PWideChar; const mafFilePath: PWideChar;
const mafVersion: PWideChar): Pointer; stdcall;
TCloseAddOnFile = procedure(var mafCode: PWideChar; var mafFilePath: PWideChar;
var mafQuitPopUp: PWideChar); stdcall;
var
CloseAddOnFile: TCloseAddOnFile;
OpenAddOnFile: TOpenAddOnFile;
AddOnMainForm: TForm;
AddOnHandle: THandle;
mafQuitPopUp: PWideChar;
mafFilePath: PWideChar;
mafVersion: PWideChar;
mafCode: PWideChar;
begin
Result := True;
mafQuitPopUp := PWideChar(EmptyStr);
mafFilePath := PWideChar(aFilePath);
mafCode := PWideChar(aCode);
mafVersion := PWideChar(aVersion);
try
AddOnHandle := LoadLibrary(PWideChar(aPath));
if (AddOnHandle <> 0) then
begin
@OpenAddOnFile := GetProcAddress(AddOnHandle, 'OpenAddOnFile');
@CloseAddOnFile := GetProcAddress(AddOnHandle, 'CloseAddOnFile');
if (@OpenAddOnFile <> nil) then
begin
AddOnMainForm := OpenAddOnFile(mafCode, mafFilePath, mafVersion);
AddOnMainForm.Position := poScreenCenter;
AddOnMainForm.ShowModal;
if (@CloseAddOnFile <> nil) then
begin
CloseAddOnFile(mafCode, mafFilePath, mafQuitPopUp);
end;
FreeAndNil(AddOnMainForm);
Application.ProcessMessages;
end;
end;
if not (mafQuitPopUp = PWideChar(EmptyStr)) then
begin
ShowMessage(mafQuitPopUp);
end;
aFilePath := String(mafFilePath);
aCode := String(mafCode);
except
Result := False;
end;
end;
end.
是,你可以在C# – 2013-05-13 15:48:47
返回一个指针那么,你是如何加载德尔福一个C#DLL。它是原生的Win32 Delphi还是Delphi.net?而C#中没有'指针'。有'IntPtr'。什么是回报价值?什么是C#应用程序意味着返回?参数指向可修改的缓冲区吗?基本上你的问题完全缺乏需要回答的细节。 – 2013-05-13 15:48:59
还有另一个问题。什么“它不工作的意思”?你的开发工具为你提供包含详细信息的错误消息。你为什么不传递这些信息。你想让我们很难吗?! – 2013-05-13 15:54:58