我必须从 WPF 中的 WebBrowser 静默打印 HTML 文档。我已经通过该代码不默默地完成了它：
mshtml.IHTMLDocument2 doc = WebBrowser1.Document as mshtml.IHTMLDocument2;
doc.execCommand("Print", true, null);
现在我想跳过打印对话框。
请帮忙。
对于使用 WPF WebBrowser 进行静默打印，以下代码对我有用：
private void PrintCurrentPage()
{
// document must be loaded for this to work
IOleServiceProvider sp = WebBrowser1.Document as IOleServiceProvider;
if (sp != null)
{
Guid IID_IWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046");
Guid IID_IWebBrowser2 = new Guid("D30C1661-CDAF-11d0-8A3E-00C04FC9E26E");
const int OLECMDID_PRINT = 6;
const int OLECMDEXECOPT_DONTPROMPTUSER = 2;
dynamic wb; // should be of IWebBrowser2 type
sp.QueryService(IID_IWebBrowserApp, IID_IWebBrowser2, out wb);
if (wb != null)
{
// this will send to the default printer
wb.ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER, null, null);
}
}
}
[ComImport, Guid("6D5140C1-7436-11CE-8034-00AA006009FA"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IOleServiceProvider
{
[PreserveSig]
int QueryService([MarshalAs(UnmanagedType.LPStruct)] Guid guidService, [MarshalAs(UnmanagedType.LPStruct)] Guid riid, [MarshalAs(UnmanagedType.IDispatch)] out object ppvObject);
}
注：答案的灵感来自这个 SO 问答
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