C#Winform中打印预览时设置横向打印

PrintDocument的打印相关的方法被调用的顺序是这样的：
QueryPageSettings
StartPage
PrintPage
EndPage
目前只处理了StartPage和PrintPage。 于是加上了QueryPageSettings事件的处理，发现每次执行打印时 QueryPageSettingsEventArgs.PageSettings.Landscape仍然为false，
虽然前面设置了 DefaultpageSettings.Landscape=true。
于是在此事件中将其指定为true，再次预览时，终于可以横向看到排列整齐的报表了。
private void button2_Click(object sender, EventArgs e) {
PrintPreviewDialog pd = new PrintPreviewDialog();
pd.Document = new PrintDocument();
pd.Document.PrintPage += new PrintPageEventHandler(Document_PrintPage);
pd.Document.QueryPageSettings += new QueryPageSettingsEventHandler(Document_QueryPageSettings); pd.Document.BeginPrint += new PrintEventHandler(Document_BeginPrint); if (pd.ShowDialog(this) == DialogResult.OK)
{
}
}
void Document_QueryPageSettings (object sender, QueryPageSettingsEventArgs e)
{
e.PageSettings.Landscape = true;
int index = -1;
for (int i=0;i {
if (e.PageSettings.PrinterSettings.PaperSizes[i].PaperName== “A4”)
{
index=i;
break;
}
}
if (index != -1)
{
e.PageSettings.PaperSize = e.PageSettings.PrinterSettings.PaperSizes[index];
}
}
void Document_BeginPrint(object sender, PrintEventArgs e)
{
}
void Document_PrintPage(object sender, PrintPageEventArgs e) {
using (Bitmap bit = new Bitmap(this.listBox.Width, this.listBox.Height))
{
this.listBox.DrawToBitmap
(bit, this.listBox.ClientRectangle);
e.Graphics.DrawImage(bit, new Point(0, 0));
}
}