/// <summary>
/// 打印过程处理
/// </summary>
private void PrintPage(object sender, PrintPageEventArgs args)
{
//没有数据，直接返回
if (listImagePath == null || listImagePath.Count == 0)
{
args.HasMorePages = false;
return;
}
//处理当前页面数据
Image pageImage = null;
try
{
//获得需要打印的数据
string fileName = listImagePath[indexPrinting];
pageImage = ImageHelper.LoaderImage(fileName);
//获得打印位置信息
GraphicsUnit unit = GraphicsUnit.Millimeter;
RectangleF rectImage = pageImage.GetBounds(ref unit);
RectangleF rectContainer = args.PageBounds;
RectangleF rectDraw = rectContainer; //初始值
//根据是否缩放设置，获得对应的绘制区域
if (saver.KeepRatio)
{
rectDraw = ImageHelper.GetKeepRadioRect(rectImage, rectContainer,
saver.MarginsCustom.Left, saver.MarginsCustom.Right,
saver.MarginsCustom.Top, saver.MarginsCustom.Bottom);
}
else
{
rectDraw = ImageHelper.GetContainerMarginRect(rectContainer,
saver.MarginsCustom.Left, saver.MarginsCustom.Right,
saver.MarginsCustom.Top, saver.MarginsCustom.Bottom);
}
//绘制
args.Graphics.DrawImage(pageImage, rectDraw);
}
catch (Exception exception)
{
MessageBox.Show(exception.Message, Trans.tr("Tip"), MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
//调用 ImageHelper.LoaderImage(fileName) 后要求使用完立刻释放图片资源
if (null != pageImage)
{
pageImage.Dispose();
}
}
//分析是否有下一页
++indexPrinting;
if (indexPrinting == listImagePath.Count)
{
args.HasMorePages = false;
indexPrinting = 0;
}
else
{
args.HasMorePages = true;
}
}