WPF WebBrowser的打印方法

1、引用system32中的SHDocVw.dll

2、引用命名空间

    using System.Runtime.InteropServices;
　 using SHDocVw;

3、在所在的类定义变量

[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("6d5140c1-7436-11ce-8034-00aa006009fa")]
internal interface IServiceProvider
{
   [return: MarshalAs(UnmanagedType.IUnknown)]
   object QueryService(ref Guid guidService, ref Guid riid);
}
static readonly Guid SID_SWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046");

4、打印方法

            IServiceProvider serviceProvider = null;
            if (webbrowse.Document != null)
            {
                serviceProvider = (IServiceProvider)webbrowse.Document;
            }
            Guid serviceGuid = SID_SWebBrowserApp;
            Guid iid = typeof(SHDocVw.IWebBrowser2).GUID;
            SHDocVw.IWebBrowser2 myWebBrowser2 = (SHDocVw.IWebBrowser2)serviceProvider.QueryService(ref serviceGuid, ref iid);
            object NullValue = null;
            myWebBrowser2.ExecWB(SHDocVw.OLECMDID.OLECMDID_PRINT, SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_PROMPTUSER, ref NullValue, ref NullValue);