如何跳转到PrintDocument中的下一页？

我有一个应用程序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，它不会跳转到下一页。

我想知道如何在PrintDocument的下一页中添加更多页面或写入。

我正在使用PrintPreview在此Windows窗体中显示PrintDocument。

Answer 1

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; }