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1， 读取图片
static container SML_ImgUrl2Bitmap(str imgUrl,str newfileName = ‘axTmpImgName1111‘)
{
System.Net.HttpWebRequest httpRequest = null;
System.Net.HttpWebResponse httpResponse = null;
CLRObject clro = null;
System.IO.Stream stream;
System.IO.StreamReader reader;
System.Drawing.Image webImage ;
BinData bidData=new BinData();
Bitmap Bitmap;
str saveFilePath;
str filepath, filename, fileExt;
real height,width;
;
[filepath, filename, fileExt] = fileNameSplit(imgUrl);
filePath= WinAPI::getTempPath();
filename= newfileName;
new InteropPermission(InteropKind::ClrInterop).assert();
try {
clro = System.Net.WebRequest::Create(imgUrl);
httpRequest = clro;
httpResponse = httpRequest.GetResponse();
stream = httpResponse.GetResponseStream();
reader = new System.IO.StreamReader(stream);
webImage = System.Drawing.Image::FromStream(stream);
saveFilePath = filePath+newfileName+fileExt;
webImage.Save(saveFilePath);
bidData.loadFile(saveFilePath);
Bitmap = bidData.getData();
height = webImage.get_Height();
width = webImage.get_Width();
} catch (Exception::CLRError) {
return [Bitmap,0,0];
}
return [Bitmap,height,width];
}
2， 按比例显示图片，A4纸，纵向打印
void initProdImg() { InventParameters InventParameters;
str imgUrl; #define.PicMaxWidth(18) // 允许图片最大宽度 #define.PicMaxHeight(8) // 允许图片最大高度 container scaleSize( int currW, int currH){ real maxW = #PicMaxWidth,maxH=#PicMaxHeight; real ratio = currH / currW; if( currH<= 144) maxH = 3; else if( currH<= 192) maxH = 4; else if( currH<= 240) maxH = 5; else if( currH<= 288) maxH = 6; if(currW >= maxW){ currW = maxW; currH = currW * ratio; } if(currH >= maxH){ currH = maxH; currW = currH / ratio; } return [currW, currH]; } void resetH(int currH){ ctrItemImg.height( currH,Units::cm); } void resetW(int currW){ ctrItemImg.width( currW,Units::cm); } ; InventParameters = InventParameters::find(); imgUrl = InventParameters.SML_InventImgUrl + curProdTable.sml_InventTableExt().SML_InventImgUrl; try { [prodImg,imgHeight,imgWidth] = SML_ImgUrl2Bitmap( imgUrl); if( !imgHeight || !imgWidth) { resetH(0); return; } else { [imgWidth,imgHeight] = scaleSize( imgWidth,imgHeight); resetH (imgHeight); resetW (imgWidth); ctrItemImg.resizeBitmap( true);// 允许图片按控件尺寸缩放。 } } catch(Exception::CLRError) { } }
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原文地址：http://www.cnblogs.com/sxypeace/p/4580641.html
