LoadImage隻能加載bmp,ico,cur檔案,但是對于jpg,gif等檔案則無能為力,下面就是介紹用VC怎麼顯示jpg,gif,bmp檔案
1:LoadImage
HBITMAP hBitmap=(HBITMAP)::LoadImage(AfxGetInstanceHandle(),"128.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_DEFAULTCOLOR|LR_DEFAULTSIZE);
2:GdiPlus
A. 在stdafx.h中或者cpp檔案的頭部引入下面兩條語句
#include <gdiplus.h>
using namespace Gdiplus;
B. 在項目屬性-》連接配接器-》輸入-》附加依賴項中加入gdiplus.lib
C. 初始化gdiplus(一般在InitInstance或者OnInitDialog中加入)
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
D.實作在一個Static(IDC_STATIC1)中顯示,在其它地方也可以隻要具有Window
RECT rect;
HDC hdc;
PAINTSTRUCT ps;
GetDlgItem(IDC_STATIC1)->GetClientRect(&rect);
hdc = GetDlgItem(IDC_STATIC1)->GetWindowDC()->m_hDC;
Graphics graphics(hdc);
//由于Gdiplus::Image img()語句的參數必須是wchar_t *的形式,下面就是将檔案名strFileName從char *轉換為wchar_t *
int wcsLen;
wchar_t* wszFileName;
wcsLen = ::MultiByteToWideChar(CP_ACP, NULL, strFileName, strlen(strFileName), NULL, 0);
wszFileName = new wchar_t[wcsLen + 1];
::MultiByteToWideChar(CP_ACP, NULL, strFileName, strlen(strFileName), wszFileName, wcsLen);
wszFileName[wcsLen] = '/0';
Gdiplus::Image img(wszFileName);
graphics.DrawImage(&img, 0, 0, rect.right - rect.left, rect.bottom - rect.top);
::ReleaseDC(GetDlgItem(IDC_STATIC1)->m_hWnd, hdc);
delete wszFileName;