我有一个应用程序可以打印您想要的条形码数量,但如果条形码的数量大于
PrintDocument的大小,则不会跳转到下一页.
我想知道如何在PrintDocument的下一页添加更多页面或写入.
我正在使用PrintPreview在此Windows窗体中显示PrintDocument.
解决方法
如果你连接OnPrintPage事件,你可以告诉PrintDocument它是否需要在PrintPageEventArguments上添加另一个页面.
IEnumerator items;
public void StartPrint()
{
PrintDocument pd = new PrintDocument();
pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
items = GetEnumerator();
if (items.MoveNext())
{
pd.Print();
}
}
private void pd_PrintPage(object sender,PrintPageEventArgs ev)
{
const int neededHeight = 200;
int line =0;
// this will be called multiple times,so keep track where you are...
// do your drawings,calculating how much space you have left on one page
bool more = true;
do
{
// draw your bars for item,handle multilple columns if needed
var item = items.Current;
line++;
// in the ev.MarginBouds the width and height of this page is available
// you use that to see if a next row will fit
if ((line * neededHeight) < ev.MarginBounds.Height )
{
break;
}
more = items.MoveNext();
} while (more);
// stop if there are no more items in your Iterator
ev.HasMorePages = more;
}
