如何從WPF應用程序中打印保存的html文件？

Question

我嘗試如下。

private void btnPrint_Click(object sender, RoutedEventArgs e)
{
        Newwebbrowser.Navigate("test.html");
            IOleServiceProvider sp = Newwebbrowser.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; // will be of IWebBrowser2 type, but dynamic is cool
                sp.QueryService(IID_IWebBrowserApp, IID_IWebBrowser2, out wb);
                if (wb != null)
                {
                    // note: this will send to the default printer, if any
                    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);
    }

HTML文件已在驅動器中。 我收到以下錯誤

System.dll中發生了類型為'System.UriFormatException'的未處理的異常

附加信息：無效的URI：無法確定URI的格式。

Newwebbrowser.Navigate（“ test.html”）; //在這里，我得到了例外

Answer 1

錯誤消息表示其內容-不知道“ test.html”的含義（或位置）。

使用“ file：/// c：\\ test \\ test.html”或“ http：//localhost/test.html ”，例如：

“文件：///” + AppDomain.CurrentDomain.BaseDirectory +“ test.html”