c 语言怎么编译 .dll,将你的 C 语言代码编译成 .NET
介紹
通常情況下，對于那些使用C語言編程并開始用C#/ VB或一些其他的用于.NET的編譯語言編程，那么他們希望或者甚至是需要調(diào)用我們用C語言編寫的函數(shù)代碼。
每當(dāng)我在互聯(lián)網(wǎng)上鉆研，或說要在編譯器中使用Visual C ++與/clr?，或使用pInvoke來調(diào)用C語言函數(shù)，都有這樣的心情。
所以我在和我的朋友，OrangeC / C ++編譯器的創(chuàng)造者，David交流的時候，我給他出了個主意，那就是為你的編譯器創(chuàng)建一個新的后端來生成CLR代碼，這樣一來，就沒有生成CLR代碼的C語言開源編譯器了。
在分離生成x86代碼的編譯器后端后，新的后端的開發(fā)在一些修復(fù)和實現(xiàn)之后開始了，我們已經(jīng)成功取得編譯器SQLite3并使用DLL與C#代碼一起編譯。
C / C ++編譯器和到MSIL后端的鏈接
你可以遵循OrangeC / C ++編譯器的開發(fā)，或致力于以下鏈接的項目貢獻：
構(gòu)建Orangec編譯器和用于MSIL的Orangec
要構(gòu)建MSIL的Orange C編譯器，你需要下載OrangeC編譯器的完整代碼，你可以在這里得到源代碼：
或者
在你下載源代碼后，在C:\orangec解壓所有zip文件，在解壓所有文件后，你需要下載MSIL后端
解壓所有文件到文件夾C:\orangec\src\occ，當(dāng)出現(xiàn)替代選項的時候，接受替代文件。
要構(gòu)建和生成源代碼，必須具備下面其中一個編譯器：MinGW
Borland C / C ++ 5.5(我用這個編譯器來構(gòu)建編譯程序)
CLang
Visual C / C ++ 10
OrangeC 編譯器
在下載和解壓所有文件后，打開CMD導(dǎo)航到文件夾C:\orangec\src，type，config.bat，在執(zhí)行config.bat，type后：omake fullbuild
這將建立所有的orangec編譯器。
構(gòu)建后，也許你會看到一個關(guān)于創(chuàng)建zip文件的錯誤，但是不要擔(dān)心。
好了，現(xiàn)在你已經(jīng)編譯好了所有的OrangeC / C ++工具鏈，為了構(gòu)建后端到MSIL，你需要去到文件夾C:\orangec\src\occ\netil，在這個文件夾里面，type(在系統(tǒng)路徑中具備ILASM?和CSC?(C#編譯器)編譯器時必須的)：omake netlib.lib
omake
在執(zhí)行這一命令后，你就有了occil.exe
使用OrangeC編譯器來生成MSIL代碼
要使用編譯器，你只需下載這篇文章中提供的鏈接，創(chuàng)建文件夾C:\orangec，解壓該文件夾中的所有zip內(nèi)容，打開CMD，然后導(dǎo)航到C:\orangec文件夾，在orangec?文件夾中，type，config.bat后，當(dāng)運行?config.bat文件時，一個新的環(huán)境變量將在CMD背景下創(chuàng)建，因此編譯器可以定位include文件夾。
*重點* ——在你的路徑中具備ILASM.EXE很有必要，為了做到這一點，你有兩個辦法把 ILASM放到你的路徑中：運行VSVARS32.BAT
在你的CMD中執(zhí)行以下命令：PATH =C:\Windows\Microsoft.NET\Framework\v4.0.30319;%PATH%
在構(gòu)建生成的IL代碼到EXE / DLL時，在路徑中具備ilasm是有必要，然而我們正在OrangeC中實施oilasm。
創(chuàng)建一個小例子
創(chuàng)建一個名為“float_to_ieee754.c”的C文件，并把代碼放到C文件：#include?#include?#include?char?*strrev_t(char?*str){????char?*p1,?*p2;????if?(!str?||?!*str)????????return?str;????for?(p1?=?str,?p2?=?str?+?strlen(str)?-?1;?p2?>?p1;?++p1,?--p2)
{
*p1?^=?*p2;
*p2?^=?*p1;
*p1?^=?*p2;
}????return?str;
}void?floatToBinary(float?f,?char?*str,?int?numeroDeBits){????int?i?=?0;????int?strIndex?=?0;????union
{????????float?f;????????unsigned?int?i;
}u;
u.f?=?f;????memset(str,?'0',?numeroDeBits);????for?(i?=?0;?i?
{
str[strIndex++]?=?(u.i?&?(1?<
u.i?>>=?1;
}
str[strIndex]?=?'\0';
str?=?strrev_t(str);
}int?main(){????float?input?=?0.0;????const?int?numeroDeBits?=?32;????char?*str?=?(char*)malloc(sizeof(char)?*?numeroDeBits);????printf("Type?a?float?number?to?convert?to?binary:?");????scanf("%f",?&input);
floatToBinary(input,?str,?numeroDeBits);????printf("%s\n",?str);????if(str?!=?NULL)????free(str);
return?0;
}
現(xiàn)在，為了構(gòu)建代碼，你需要在CMD中鍵入：occil?/NProgram.FloatToBinary?/9?float_to_ieee754.c
每個參數(shù)的說明：/N.
/9: C99 mode
在執(zhí)行此命令后，編譯器將生成指向你的代碼的IL代碼和occil調(diào)用ilasm來生成來自于IL代碼的EXE / DLL。如果你想看到生成的IL代碼，只要看看你的C代碼所在的文件夾，打開“float_to_ieee754.il”。
生成IL代碼：//File?float_to_ieee754.il//Compiler?version?MSIL?Compiler.corflags?3?//?32-bit.assembly?float_to_ieee754?{?}
.assembly?extern?mscorlib?{?}
.assembly?extern?lsmsilcrtl?{?}
.namespace?'Program'?{
.class?public?explicit?ansi?sealed?'FloatToBinary'?{
.field?public?static?valuetype?'Program.FloatToBinary?int8[]'?'L_3'?at?$L_3
.data?$L_3?=?bytearray?(25?73?a?0)
.field?public?static?valuetype?'Program.FloatToBinary?int8[]'?'L_2'?at?$L_2
.data?$L_2?=?bytearray?(25?66?0)
.field?public?static?valuetype?'Program.FloatToBinary?int8[]'?'L_1'?at?$L_1
.data?$L_1?=?bytearray?(54?79?70?65?20?61?20?66
6c?6f?61?74?20?6e?75?6d????62?65?72?20?74?6f?20?63
6f?6e?76?65?72?74?20?74
6f?20?62?69?6e?61?72?79
3a?20?0)
.method?public?hidebysig?static?int32?'main'(int32?'argc',?void?*?'argv')??cil?managed
{//?Line?43:????int?main()
.maxstack????3
.locals(
[0]????????float32?'input/0',
[1]????????void*?'str/1'
)
L_4://?Line?45:????????float?input?=?0.0;
ldloca????'input/0'
ldc.r4????0.0
stind.r4//?Line?46:????????const?int?numeroDeBits?=?32;
ldloca????'str/1'
ldc.i4????32
conv.u4
call????void*?[lsmsilcrtl]lsmsilcrtl.rtl::malloc(uint32)
stind.i4//?Line?48:????????printf("Type?a?float?number?to?convert?to?binary:?");
ldsflda????valuetype?'Program.FloatToBinary?int8[]'?Program.FloatToBinary::L_1
call????vararg?int32?'printf'(void*,?...)
pop//?Line?49:????????scanf("%f",?&input);
ldsflda????valuetype?'Program.FloatToBinary?int8[]'?Program.FloatToBinary::L_2
ldloca????'input/0'
call????vararg?int32?'scanf'(void*,?...,?void*)
pop//?Line?50:????????floatToBinary(input,?str,?numeroDeBits);
ldloc????'input/0'
ldloc????'str/1'
ldc.i4????32
call????void?Program.FloatToBinary::'floatToBinary'(float32,?void*,?int32)//?Line?51:????????printf("%s\n",?str);
ldsflda????valuetype?'Program.FloatToBinary?int8[]'?Program.FloatToBinary::L_3
ldloc????'str/1'
call????vararg?int32?'printf'(void*,?...,?void*)
pop//?Line?52:????????if(str?!=?NULL)
ldloc????'str/1'
brfalse?'L_7'//?Line?53:????????free(str);
ldloc????'str/1'
call????void?[lsmsilcrtl]lsmsilcrtl.rtl::free(void*)
L_7://?Line?54:????????return?0;
ldc.i4????0//?Line?55:????}L_5:
ret
}
.method?public?hidebysig?static?void*?'strrev_t'(void*?'str'?)?cil?managed
{//?Line?5:????char?*strrev_t(char?*str)
.maxstack????4
.locals(
[0]????????void*?'p1/0',
[1]????????void*?'p2/1'
)
L_17://?Line?7:????????char?*p1,?*p2;//?Line?9:????????if?(!str?||?!*str)
ldarg????'str'
brfalse?'L_37'
ldarg????'str'
ldind.i1
brtrue?'L_20'L_37://?Line?10:????????????return?str;
ldarg????'str'
br?'L_18'L_20:
ldarg????'str'
stloc????'p1/0'
ldarg????'str'
call????uint32?'strlen'(void*)
ldarg????'str'
add
ldc.i4????1
sub
stloc????'p2/1'
br?'L_26'L_25://?Line?12:????????{//?Line?13:????????????*p1?^=?*p2;
ldloc????'p1/0'
ldloc????'p1/0'
ldind.i1
ldloc????'p2/1'
ldind.i1
xor
stind.i1//?Line?14:????????????*p2?^=?*p1;
ldloc????'p2/1'
ldloc????'p2/1'
ldind.i1
ldloc????'p1/0'
ldind.i1
xor
stind.i1//?Line?15:????????????*p1?^=?*p2;
ldloc????'p1/0'
ldloc????'p1/0'
ldind.i1
ldloc????'p2/1'
ldind.i1
xor
stind.i1
L_28:
ldloc????'p1/0'
ldc.i4????1
add
stloc????'p1/0'
ldloc????'p2/1'
ldc.i4????1
sub
stloc????'p2/1'//?Line?11:????????for?(p1?=?str,?p2?=?str?+?strlen(str)?-?1;?p2?>?p1;?++p1,?--p2)L_26:
ldloc????'p2/1'
ldloc????'p1/0'
bgt?'L_25'L_27://?Line?16:????????}
ldarg????'str'//?Line?18:????}L_18:
ret
}
.method?public?hidebysig?static?void?'floatToBinary'(float32?'f'?,void*?'str'?,?int32?'numeroDeBits'?)?cil?managed
{//?Line?20:????void?floatToBinary(float?f,?char?*str,?int?numeroDeBits)
.maxstack????4
.locals(
[0]????????int32?'i/0',
[1]????????int32?'strIndex/1',
[2]????????valuetype?'Program.FloatToBinary?__anontype_2486130647_0'?'u/2'
)
L_41://?Line?22:????????int?i?=?0;
ldloca????'i/0'
ldc.i4????0
stind.i4//?Line?23:????????int?strIndex?=?0;
ldloca????'strIndex/1'
ldc.i4????0
stind.i4//?Line?29:????????u.f?=?f;
ldloca????'u/2'
ldarg????'f'
stind.r4//?Line?30:????????memset(str,?'0',?numeroDeBits);
ldarg????'str'
ldc.i4????48
ldarg????'numeroDeBits'
conv.u4
call????void*?'memset'(void*,?int32,?uint32)
pop//?Line?31:
ldc.i4????0
stloc????'i/0'
br?'L_45'L_44://?Line?33:????????{//?Line?34:????????????str[strIndex++]?=?(u.i?&?(1?<
ldloc????'strIndex/1'
ldarg????'str'
add
ldloc????'strIndex/1'
ldc.i4????1
add
stloc????'strIndex/1'
ldloca????'u/2'
ldind.u4
ldc.i4????1
and
brfalse?'L_56'
ldc.i4????49
br?'L_57'L_56:
ldc.i4????48L_57:
conv.i1
stind.i1//?Line?35:????????????u.i?>>=?1;
ldloca????'u/2'
ldloca????'u/2'
ldind.u4
ldc.i4????1
shr.un
stind.i4
L_47:
ldloc????'i/0'
ldc.i4????1
add
stloc????'i/0'//?Line?32:????????for?(i?=?0;?i?
ldloc????'i/0'
ldarg????'numeroDeBits'
blt?'L_44'L_46://?Line?36:????????}
ldloc????'strIndex/1'
ldarg????'str'
add
ldc.i4????0
stind.i1//?Line?39:
ldarg????'str'
call????void*?Program.FloatToBinary::'strrev_t'(void*)
starg????'str'//?Line?41:????}L_42:
ret
}
.field?public?static?void?*'__stdin'
.field?public?static?void?*'__stdout'
.field?public?static?void?*'__stderr'
.field?public?static?void?*'_pctype'.method?private?hidebysig?static?void?'$Main'()?cil?managed?{
.entrypoint
.locals?(
[0]?int32?'argc',
[1]?void?*?'argv',
[2]?void?*?'environ',
[3]?void?*?'newmode'
)
.maxstack?5
call?void?*'__pctype_func'()
stsfld?void?*?Program.FloatToBinary::_pctype
call?void?*'__iob_func'()
dup
stsfld?void?*?Program.FloatToBinary::__stdin
dup
ldc.i4?32
add
stsfld?void?*?Program.FloatToBinary::__stdout
ldc.i4?64
add
stsfld?void?*?Program.FloatToBinary::__stderr
ldloca?'argc'
ldloca?'argv'
ldloca?'environ'
ldc.i4??0
ldloca?'newmode'
call?void?__getmainargs(void?*,?void?*,?void?*,?int32,?void?*);
ldloc?'argc'
ldloc?'argv'
call?int32?Program.FloatToBinary::main(int32,?void?*)????call?void?exit(int32)
ret
}
.class?nested?private?value?explicit?ansi?sealed?'int8[]'?{.pack?1?.size?1}
.class?nested?public?value?explicit
auto?sequential?ansi?sealed?'__anontype_2486130647_0'?{.pack?4?.size?4}
.class?nested?public?value?explicit?auto?sequential?ansi?sealed?'int32[2]'?{.pack?1?.size?8?}
.class?enum?nested?public?auto?ansi?sealed?'orient'?{
.field?public?static?literal?valuetype?Program.FloatToBinary/orient?__or_unspecified?=?int32(0)
.field?public?static?literal?valuetype?Program.FloatToBinary/orient?__or_narrow?=?int32(1)
.field?public?static?literal?valuetype?Program.FloatToBinary/orient?__or_wide?=?int32(2)
.field?public?specialname?rtspecialname?int32?value__
}
}
}
.method?private?hidebysig?static?void?*?__GetErrno()?cil?managed?{
.maxstack?1
call?void?*?'_errno'()
ret
}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)void*?'memset'(void*,?int32,?uint32)?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)uint32?'strlen'(void*)?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)vararg?int32?'scanf'(void*)?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)void?'exit'(int32)?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)vararg?int32?'printf'(void*)?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)void?'__getmainargs'(void*,?void*,?void*,?int32,?void*)?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)void*?'__pctype_func'()?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)void*?'_errno'()?preservesig?{}
.method?public?hidebysig?static?pinvokeimpl("msvcrt.dll"?cdecl)void*?'__iob_func'()?preservesig?{}
為了執(zhí)行生成的EXE / DLL，有兩個可執(zhí)行的DLL很有必要，這樣你可以在C:\orangec\bin\中得到這兩個DLL，你只要復(fù)制DLL到相同EXE文件夾，并執(zhí)行生成的EXE。
構(gòu)建一個簡單的GUI應(yīng)用程序
編譯器還不支持所有創(chuàng)建有Windows?GUI的復(fù)雜程序，但可以編譯簡單程序，在這個例子中，讓我們創(chuàng)建一個簡單的窗口。
*注*：為了編譯代碼來使用圖形界面，此時我們?nèi)匀恍枰暶髦饕糠帧?/p>
在這個簡單的示例中，我們創(chuàng)建了一個C文件，叫做：window.c#include?#include?const?char?g_szClassName[]?=?"WindowClass";void?createButtons(HWND?hwnd){
CreateWindow("button",?"Beep",
WS_VISIBLE?|?WS_CHILD,????????20,?50,?80,?25,
hwnd,?(HMENU)1,?NULL,?NULL);
CreateWindow("button",?"Quit",
WS_VISIBLE?|?WS_CHILD,????????120,?50,?80,?25,
hwnd,?(HMENU)2,?NULL,?NULL);
}LRESULT?CALLBACK?WndProc(HWND?hwnd,?UINT?msg,?WPARAM?wParam,?LPARAM?lParam){????switch?(msg)
{????case?WM_CREATE:
createButtons(hwnd);????????break;????case?WM_COMMAND:
{????????if?(LOWORD(wParam)?==?1)
Beep(40,?50);????????if?(LOWORD(wParam)?==?2)?{
MessageBox(hwnd,?"Goodbye,?cruel?world!",?"Note",?MB_OK);
PostQuitMessage(0);
}????????break;
}????case?WM_CLOSE:
DestroyWindow(hwnd);????????break;????case?WM_DESTROY:
PostQuitMessage(0);????????break;????default:????????return?DefWindowProc(hwnd,?msg,?wParam,?lParam);
}????return?0;
}int?WINAPI?WinMain(HINSTANCE?hInstance,?HINSTANCE?hPrevInstance,?LPSTR?lpCmdLine,?int?nCmdShow){
WNDCLASSEX?wc;
HWND?hwnd;
MSG?Msg;
wc.cbSize?=?sizeof(WNDCLASSEX);
wc.style?=?0;
wc.lpfnWndProc?=?WndProc;
wc.cbClsExtra?=?0;
wc.cbWndExtra?=?0;
wc.hInstance?=?hInstance;
wc.hIcon?=?LoadIcon(NULL,?IDI_APPLICATION);
wc.hCursor?=?LoadCursor(NULL,?IDC_ARROW);
wc.hbrBackground?=?(HBRUSH)(COLOR_WINDOW?+?1);
wc.lpszMenuName?=?NULL;
wc.lpszClassName?=?g_szClassName;
wc.hIconSm?=?LoadIcon(NULL,?IDI_APPLICATION);????if?(!RegisterClassEx(&wc))
{
MessageBox(NULL,?"Window?Registration?Failed!",?"Error!",
MB_ICONEXCLAMATION?|?MB_OK);????????return?0;
}
hwnd?=?CreateWindowExA(
WS_EX_CLIENTEDGE,
g_szClassName,????????"Test?window?in?.Net!!??",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,?CW_USEDEFAULT,?230,?150,????????NULL,?NULL,?hInstance,?NULL);????if?(hwnd?==?NULL)
{
MessageBox(NULL,?"Window?Creation?Failed!",?"Error!",
MB_ICONEXCLAMATION?|?MB_OK);????????return?0;
}
ShowWindow(hwnd,?nCmdShow);
UpdateWindow(hwnd);????while?(GetMessage(&Msg,?NULL,?0,?0)?>?0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}????return?Msg.wParam;
}int?main(int?argc,?char*?argv[]){
STARTUPINFOA?si;
GetStartupInfoA(&si);????int?ret?=?WinMain(GetModuleHandleA(NULL),?NULL,?"",?(si.dwFlags?&?1)???si.wShowWindow?:?10);????return?ret;
}
要生成這個源代碼，報告編譯器libs.在源中使用了什么是必要的，因此，在命令行中生成源代碼是這樣的：occil?/Lkernel32?/Luser32?/9?window.c
生成之后，我們就可以執(zhí)行應(yīng)用程序: ?)
在C#中創(chuàng)建并使用來自于C語言代碼的DLL
現(xiàn)在我們知道如何從C語言代碼創(chuàng)建一個.NET EXE。下面讓我們從C語言代碼創(chuàng)建一個DLL，并和你的C#代碼一起使用它。
用C語言創(chuàng)建一個簡單的堆棧，為此，創(chuàng)建一個名為“stack.c”的C文件，并在文件中插入下面的代碼：#include?#include?typedef?struct?_stack_
{????int?size;????int?totalitems;????int*?stack;
}?stack;stack*?pl_initastack(int?size);void?pl_push(stack*?pl,?int?elemento,?int*?success);int?pl_pop(stack*?pl,?int*?success);int?pl_top(stack?*pl,?int*?success);int?pl_base(stack*?pl,?int?*success);int?pl_stackfull(stack*?pl);int?pl_stackempty(stack*?pl);void?pl_freestack(stack?*pl);void?pl_cleanstack(stack?*pl);stack*?pl_initastack(int?size){????stack*?pl?=?(stack*)malloc(sizeof(stack));
pl->stack?=?(int*)malloc(sizeof(int)?*?size);
pl->size?=?size;
pl->totalitems?=?0;????return?pl;
}void?pl_push(stack*?pl,?int?elemento,?int*?success){????if?(!pl_stackfull(pl))
pl->stack[pl->totalitems++]?=?elemento;????else
*success?=?0;
}int?pl_pop(stack*?pl,?int*?success){????if?(!pl_stackempty(pl))
{
*success?=?1;????????return?pl->stack[--pl->totalitems];
}????else
{
*success?=?0;????????return?-1;
}
}int?pl_top(stack?*pl,?int*?success){????if?(pl_stackempty(pl))
{
*success?=?0;????????return?-1;
}????else
{
*success?=?1;????????return?pl->stack[pl->totalitems?-?1];
}
}int?pl_base(stack*?pl,?int?*success){????if?(pl_stackempty(pl))
{
*success?=?0;????????return?-1;
}????else
{
*success?=?1;????????return?pl->stack[0];
}
}int?pl_stackfull(stack*?pl){????return?pl->totalitems?>=?pl->size;
}int?pl_stackempty(stack*?pl){????return?pl->totalitems?==?0;
}void?pl_freestack(stack*?pl){????free(pl->stack);????free(pl);
}void?pl_cleanstack(stack?*pl){
pl->stack?=?malloc(sizeof(int)?*?pl->size);
pl->totalitems?=?0;
}
現(xiàn)在，你需要用選項/Wd生成這個源代碼。這將告訴編譯器你想要生成一個DLL，所以為了建立這個文件，我們使用這個命令行：occil?/ostackdll.il?/c?/Wd?/9?/NStackLib.Stack?stack.c
建立stack.c后，讓我們構(gòu)建生成的IL代碼到DLL：ilasm?/DLL?stackdll.il
現(xiàn)在，讓我們創(chuàng)建C#項目。在這篇文章中，我創(chuàng)建了一個.NET 4.0的C#項目。
對此，你可以使用OCC生成的DLL，你需要在C#項目中做一些設(shè)置：Enable Unsafe code
Plataform target: x86
在設(shè)置這些選項后，在引用中添加stack.dll，并寫代碼來使用DLL，在這種情況下，我寫了這個簡單的示例程序：using?System;namespace?Stack{????unsafe?class?Program
{????????static?void?Main(string[]?args)????????{????????????void*?stk?=?null;
stk?=?StackLib.Stack.pl_initastack(5);????????????int?success?=?1;
Console.WriteLine("Pushing?values?to?stack...");????????????for(int?i=0;?(success?==?1);?i++)
{????????????????int?val?=?i?*?10;
StackLib.Stack.pl_push(stk,?val,?&success);
}
Console.WriteLine("Base?value?in?stack:?{0}",?StackLib.Stack.pl_base(stk,?&success));
Console.WriteLine("Top?value?in?stack.:?{0}",?StackLib.Stack.pl_top(stk,?&success));
Console.WriteLine("Poping?values?from?stack");????????????while(true)
{????????????????int?val?=?StackLib.Stack.pl_pop(stk,?&success);????????????????if?(success?==?0)????????????????????break;
Console.WriteLine("{0}",?val);
}
StackLib.Stack.pl_freestack(stk);
stk?=?null;
}
}
}
在你構(gòu)建EXE后，不要忘了復(fù)制在orangec文件夾的BIN文件夾中的兩個DLL。
使用SQLite
現(xiàn)在我們知道如何在C語言中創(chuàng)建并使用來自于源代碼的DLL，讓我們使用SQLite！
你可以在文件夾?\samples\sqlite3中找到SQLite源代碼。
要構(gòu)建SQLite源代碼，有必要使用此命令行：occil?/9?/Wd?/Lkernel32?sqlite3.c?/Nsqlite3.sqlite
在建立SQLite后，創(chuàng)建一個C#或任何其他.NET項目，隨你選擇，在項目中添加SQLite的編譯DLL的引用，設(shè)置項目類型為x86以及在必要時啟用不安全模式，在我的情況中，我創(chuàng)建了一個簡單的C#項目，并隨便弄了個小程序來使用SQLite：using?System;using?System.IO;using?sqlite3;using?lsmsilcrtl;namespace?sqliteil{????unsafe?class?Program
{????????static?string[]?Names?{?get;?}?=?new?string[]
{????????????"Bob",????????????"Tom",????????????"Carlos",????????????"Marcos",????????????"Alexandre",????????????"Alex",????????????"Morgana",????????????"Maria",????????????"Jose",????????????"Joao",????????????"Marcos",????????????"Gustavo",????????????"Roberto",????????????"Rodrigo",????????????"Teste"
};????????static?int?Main(string[]?args)????????{
String?dbName?=?"dbtest.db";????????????if?(File.Exists(dbName))
File.Delete(dbName);????????????void*?db;????????????//?Create?the?database
int?rc?=?sqlite.sqlite3_open(CString.ToPointer(dbName),?&db);????????????if?(rc?!=?0)
{
Console.WriteLine("Fail?to?create?the?database?:?(");????????????????return?-1;
}????????????//?Create?the?table
void*?stmt;
sqlite3.sqlite.sqlite3_prepare_v2(db,?CString.ToPointer("CREATE?TABLE?demo?(name?TEXT,?age?INTEGER);"),?-1,?&stmt,?null);
rc?=?sqlite.sqlite3_step(stmt);????????????if?(rc?!=?101)
{
Console.WriteLine("Fail?to?create?the?table?:?(");????????????????return?-1;
}
sqlite.sqlite3_finalize(stmt);????????????//?Insert?some?data?in?table
foreach?(var?name?in?Names)
{????????????????var?insertLine?=?String.Format("insert?into?demo?(name,?age)?values?('{0}',?{1});",?name,?new?Random().Next(1,?99));????????????????var?query?=?CString.ToPointer(insertLine);
sqlite.sqlite3_prepare_v2(db,?query,?insertLine.Length,?&stmt,?null);
rc?=?sqlite.sqlite3_step(stmt);????????????????if?(rc?!=?101)
{
Console.WriteLine("Fail?to?insert?the?name:?{0}",?name);
}
sqlite.sqlite3_finalize(stmt);
}????????????//?Read?the?inserted?data...
var?select?=?"SELECT?*?FROM?demo;";
rc?=?sqlite.sqlite3_prepare_v2(db,?CString.ToPointer(select),?select.Length,?&stmt,?null);????????????if(rc?==?0)
{????????????????bool?done?=?false;????????????????while(!done)
{????????????????????switch(rc?=?sqlite.sqlite3_step(stmt))
{????????????????????????case?5:????????????????????????case?101:
done?=?true;????????????????????????????break;????????????????????????case?100:
{????????????????????????????????string?name?=?new?CString(sqlite.sqlite3_column_text(stmt,?0)).ToString();????????????????????????????????int?age?=?sqlite.sqlite3_column_int(stmt,?1);
Console.WriteLine("Name:?{0}?--?Age:?{1}",?name,?age);
rc?=?0;
}????????????????????????????break;????????????????????????default:
done?=?true;????????????????????????????break;
}
}
}
sqlite.sqlite3_close(db);????????????return?0;
}
}
}
該項目在SQLite測試文件夾內(nèi)。
總結(jié)
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