Asp.net中使用mshtml

在asp.net中使用mshtml  Com组件

需要添加接口IPersistStreamInit

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.InteropServices;

namespace MsHtmlWeb

{

    [ComVisible(true), ComImport(),

Guid("7FD52380-4E07-101B-AE2D-08002B2EC713"),

InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]

    public interface IPersistStreamInit

    {

        void GetClassID([In, Out] ref Guid pClassID);

        [return: MarshalAs(UnmanagedType.I4)]

        [PreserveSig]

        int IsDirty();

        [return: MarshalAs(UnmanagedType.I4)]

        [PreserveSig]

        int Load([In] UCOMIStream pstm);

        [return: MarshalAs(UnmanagedType.I4)]

        [PreserveSig]

        int Save([In] UCOMIStream pstm, [In,

            MarshalAs(UnmanagedType.Bool)] bool fClearDirty);

        void GetSizeMax([Out] long pcbSize);

        [return: MarshalAs(UnmanagedType.I4)]

        [PreserveSig]

        int InitNew();

    }

}

在asp.net页面中

namespace MsHtmlWeb

{

    public partial class WebFormMSHtml : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

            }

            //mshtml.HTMLDocument objMSHTML = new mshtml.HTMLDocument();

            //mshtml.IHTMLDocument2 objMSHTML2;

            //mshtml.IHTMLDocument3 objMSHTML3;

            //int x = 10;

            ////a dummy variable

            ////IPersistStreamInit objIPS;

            //////here is the whole trick

            ////objIPS = (IPersistStreamInit)objMSHTML;

            //objIPS.InitNew();

            ////you have to do it, if not you will always have readyState as "loading"

            //objMSHTML2 = objMSHTML.createDocumentFromUrl(url, null);

            //while (!(objMSHTML2.readyState == "complete"))

            //{

            //    x = x + 1;

            //}

            //objMSHTML3 = (mshtml.IHTMLDocument3)objMSHTML2;

            //IHTMLElementCollection d = objMSHTML3.getElementsByName("q");

            //IHTMLElementCollection de = objMSHTML3.getElementsByName("btnG");

            //HTMLInputElementClass cn = (HTMLInputElementClass)d.item("q", 0);

            //cn.value = "biso";

            //HTMLInputElementClass bt = (HTMLInputElementClass)de.item("btnG", 0);

            //bt.click();

            //// this does not fire

            //string s = objMSHTML3.documentElement.innerHTML;

        }

        protected void Button1_Click(object sender, EventArgs e)

        {

            mshtml.HTMLDocument  htmldoc;

            //IHTMLDocument2 htmldoc;

            htmldoc = new mshtml.HTMLDocument();

            //htmldoc = new IHTMLDocument2();

            mshtml.IHTMLDocument2 htmldoc2;

            mshtml.IHTMLDocument3 htmldoc3;

            IPersistStreamInit ips = (IPersistStreamInit)htmldoc;

            ips.InitNew();

            htmldoc2 = (mshtml.IHTMLDocument2)htmldoc.createDocumentFromUrl("http://www.baidu.com", null);

            while (htmldoc2.readyState != "complete") ;

            htmldoc3 = (mshtml.IHTMLDocument3)htmldoc2;

            //Literal ltr = new Literal();

            //ltr.Text = Server.HtmlEncode(htmldoc3.documentElement.innerHTML);

            //Panel1.Controls.Add(ltr);

            IHTMLElement he = htmldoc3.getElementById("kw");

            he.setAttribute("value", "F555");

            string s = htmldoc3.documentElement.innerHTML;

            Label1.Text = s;//he.tagName+"z";

        }

        private void aa(string strString)

        { 

            mshtml.HTMLDocument htmldocument=new HTMLDocument();

            mshtml.IHTMLDocument2 doc = htmldocument.createDocumentFromUrl(strString, "");

                //,mshtml.IHTMLDocument2

            IHTMLElement2 element = doc.body as IHTMLElement2;

            //string s=element.

        //Dim htmldocument as New mshtml.htmldocument

//Dim doc As mshtml.IHTMLDocument2 =

//CType(htmldocument.createDocumentFromUrl(strString, ""),

//mshtml.IHTMLDocument2)

//Dim timeout As DateTime = Now

//Do Until htmldocument.readyState = "complete" Or Now.Subtract

//(timeout).TotalSeconds >= 4

//System.Threading.Thread.CurrentThread.Sleep(100)

//Loop

        }

        protected void Button2_Click(object sender, EventArgs e)

        {

            mshtml.HTMLDocument htmldoc;

            //IHTMLDocument2 htmldoc;

            htmldoc = new mshtml.HTMLDocument();

            //htmldoc = new IHTMLDocument2();

            mshtml.IHTMLDocument2 htmldoc2;

            mshtml.IHTMLDocument3 htmldoc3;

            IPersistStreamInit ips = (IPersistStreamInit)htmldoc;

            ips.InitNew();

            htmldoc2 = (mshtml.IHTMLDocument2)htmldoc.createDocumentFromUrl("http://baidu.lehecai.com/lottery/draw/view/200", null);

            while (htmldoc2.readyState != "complete") ;

            htmldoc3 = (mshtml.IHTMLDocument3)htmldoc2;

            IHTMLElement he = htmldoc3.getElementById("jq_latest_draw_result");

            string strLast = string.Empty;

            if (!string.IsNullOrEmpty(he.innerText))

            {

                  strLast = he.innerText.Trim();

            }

            if (!string.IsNullOrEmpty(strLast))

            {

                string[] strList = strLast.Split(new char[] { ' ' });

                string aa = string.Empty;

                foreach (var item in strList)

                {

                    aa += item + ",";

                }

                if (aa.EndsWith(","))

                    aa = aa.TrimEnd(new char[] { ',' });

                Label2.Text = aa;

            }

           // 

        }

    }

}

发生错误解决

在vs2010中运行HTMLDocumentClass doc =new HTMLDocumentClass(); 会出现Interop type 'mshtml.HTMLDocumentClass' cannot be embedded. Use the applicable interface instead.的编译错误。原因是我们添加 Microsoft.mshtml的时候，由于mshtml.dll太大，微软设置了这个属性Embed Interop Type =true .

解决的办法是：直接去掉Class后缀。