报表打印网络按比例打印网络图片

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)    {

    }
}