VC++ 按钮加载bmp位图的方法
1、方法一、显示位图文件
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HBITMAP hBitmap=(HBITMAP)LoadImage(NULL,_T(“xxx.bmp”),Image_Bitmap,0,0,Lr_CreateDibSection|Lr_DefaultSize|Lr_LoadFromFile);
//加载bmp文件 xxx.bmp 就是要加载的图片名字
CBitmap bitmap; bitmap.Attach(hBitmap); //关联位图对象
CDC dcimage;dcimage.CreateCompatibleDC(pDC); //内存
DCBITMAP bmp;bitmap.GetBitmap(&bmp); //获取位图信息
dcimage.SelectObject(&bitmap); //选取位图对象
pDC->BitBlt(0,0,bmp.bmWidth,bmp.bmHeight,&dcimage,0,0,SRCCOPY); //显示
2、方法二、用文件打开对话框选取图片
你建立一个基于对话框的程序，在主对话框上加载一个 PictureBox，然后加载一个Button，添加点击Button事件。
具体代码如下：
CFileDialog dlg(TRUE,"bmp",".bmp",OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,"位图文件(*.BMP)|*.BMP||");
dlg.DoModal();
HBITMAP hBitmap;
HDC hSrcDC;
HDC hDesDC;
CBitmap bmp;
CWnd *hwnd;
RECT rect;
BITMAP bm;
hwnd = GetDlgItem(IDC_STATIC);
hDesDC = hwnd->GetDC()->m_hDC;
hSrcDC = CreateCompatibleDC(hDesDC);
hBitmap=(HBITMAP)LoadImage(AfxGetInstanceHandle(),dlg.GetPathName(),IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION); GetObject(hBitmap, sizeof BITMAP, &bm);
SelectObject(hSrcDC, hBitmap);
hwnd->GetClientRect(&rect);
::SetStretchBltMode(hDesDC,COLORONCOLOR);
::StretchBlt(hDesDC, rect.left, rect.top, rect.right, rect.bottom, hSrcDC, 0, 0, bm.bmWidth, bm.bmHeight,SRCCOPY);
3、直接用mfc自带的static 图片控件显示bmp位图资源
方法1:
1) 更改属性Picture Control属性 2) 直接关联上image: 设置Image属性 3) 更改type为Bitmap 方法2:(PictureEx类网上搜) 1)添加控件变量为PictureEx对象 2) 直接m_pic1.LoadBitmap(IDB_BITMAP1); 示例: 1. 关联 Picture Control 对象: m_stPicture 2. 添加2个BMP资源 IDB_BITMAP1, IDB_BITMAP2 3. 定义: HBITMAP m_hBitmap;
4、4. 一开始显示图片
BOOL CShowBmpDlg::OnInitDialog(){ CDialog::OnInitDialog(); ...... //显示图片 m_hBitmap = (HBITMAP)LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BITMAP1), IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS); m_stPicture.ModifyStyle(0xF, SS_BITMAP); m_stPicture.SetBitmap(m_hBitmap); return TRUE; // 除非设置了控件的焦点，否则返回 TRUE }
5、5. 切换图片void CShowBmpDlg::OnBnClickedOk(){
static int nId = 0; nId++; if (NULL != m_hBitmap) { ::DeleteObject(m_hBitmap); m_hBitmap = NULL; } int nPicId = nId = nId % 2 ? IDB_BITMAP2 : IDB_BITMAP1; m_hBitmap = (HBITMAP)LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(nPicId), IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS); m_stPicture.ModifyStyle(0xF, SS_BITMAP); m_stPicture.SetBitmap(m_hBitmap);}
