protected void PrintCurrentPage(object sender, WriterCommandEventArgs args)
{
if (args.Mode == WriterCommandEventMode.QueryState)
{
args.Enabled = (args.Document != null &&
args.EditorControl != null &&
args.Document.Options.BehaviorOptions.Printable);
}
else if (args.Mode == WriterCommandEventMode.Invoke)
{
args.Result = false;
if (args.Document.Options.BehaviorOptions.Printable == false)
{
// 文档禁止打印
return;
}
DocumentPrinter printer = new DocumentPrinter(args.Document);
if (args.EditorControl != null)
{
printer.JumpPrint = args.EditorControl._JumpPrint;
printer.CurrentPage = args.EditorControl.CurrentPage;
}
if (args.Parameter is JumpPrintInfo)
{
JumpPrintInfo info = (JumpPrintInfo)args.Parameter;
printer.JumpPrint = args.Document.GetJumpPrintInfo(info.Position);
}
printer.PrintRange = System.Drawing.Printing.PrintRange.CurrentPage;
InnerPrint(args, printer, false);
}
}
private void InnerPrint(
WriterCommandEventArgs args,
DocumentPrinter printer,
bool refreshDocument)
{
System.Windows.Forms.Cursor cur = null;
JumpPrintInfo infoBack = null;
int piBack = -1;
if (args.EditorControl != null)
{
infoBack = args.EditorControl._JumpPrint.Clone();
if (infoBack.Enabled && infoBack.Page != null)
{
piBack = args.EditorControl.Pages.IndexOf(infoBack.Page);
}
printer.WriterControl = args.EditorControl;
cur = args.EditorControl.Cursor;
args.EditorControl.Cursor = System.Windows.Forms.Cursors.WaitCursor;
if (refreshDocument)
{
// 冻结用户界面
args.EditorControl.FreezeUI();
}
}
try
{
args.Result = printer.PrintDocument(args.ShowUI);
}
finally
{
if (args.EditorControl != null)
{
if (refreshDocument)
{
args.EditorControl.RefreshDocument();
if (piBack >= 0)
{
infoBack.Page = args.EditorControl.Pages[piBack];
args.EditorControl._JumpPrint = infoBack;
}
args.EditorControl.ReleaseFreezeUI();
}
args.EditorControl.Cursor = cur;
}
}
}