C# html互转mht

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.IO;


namespace HTMLConversion
{
    /// <summary>
    /// HtmlConvertToMht 类
    /// </summary>
    #region HtmlConvertToMht 类的实现
    public class HtmlConvertToMhtByCdo : IHtmlConvertToMht
    {
        public HtmlConvertToMhtByCdo()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        
        #region 变量
        
        string _CharSet="gb2312";
        
        #endregion
        
        #region 属性
        public string CharSet
        {
            get
            {
                return _CharSet;
            }
            set
            {
                _CharSet = value;
            }
        }
        #endregion
        
        #region 方法
        /// <summary>
        /// 把Html格式二进制流转换成Mht格式的二进制流
        /// </summary>
        /// <param name="htmlUrl">Html格式的二进制流</param>
        /// <returns>Mht格式的二进制流</returns>
        public byte[] ConvertHtmlUrlToMht(string htmlUrl)
        {
            string strMhtContent = string.Empty;
            byte[] BytMhtContent = null;
            CDO.Message  message = new CDO.MessageClass();
            ADODB.Stream  stream=null;
            message.MimeFormatted =true;
            message.CreateMHTMLBody(htmlUrl,CDO.CdoMHTMLFlags.cdoSuppressNone,"",""); 
            stream = message.GetStream();
            stream.Charset = _CharSet;
            strMhtContent= stream.ReadText(stream.Size);
            BytMhtContent = Encoding.GetEncoding(_CharSet).GetBytes(strMhtContent);
            return BytMhtContent;
        }
        
        /// <summary>
        /// 把Html格式二进制流转换成Mht格式的二进制流,成功返回true,失败返回false
        /// </summary>
        /// <param name="htmlUrl">Html格式的二进制流</param>
        /// <param name="filePath">Mht文件的保存路径</param>
        /// <returns>操作结果 成功:true,失败;false</returns>
        public bool ConvertHtmlUrlToMht(string htmlUrl,string filePath)
        {
            bool isConvertHtmlBytesToMht = false;
            CDO.Message  message = new CDO.MessageClass();
            ADODB.Stream  stream=null;
            message.MimeFormatted =true;
            message.CreateMHTMLBody(htmlUrl,CDO.CdoMHTMLFlags.cdoSuppressNone,"",""); 
            stream = message.GetStream();
            stream.SaveToFile(filePath,ADODB.SaveOptionsEnum.adSaveCreateOverWrite);
            message=null;
            stream.Close();
            isConvertHtmlBytesToMht=true;
            return isConvertHtmlBytesToMht;
        }
        /// <summary>
        /// 把Html格式二进制流转换成Mht格式的二进制流
        /// </summary>
        /// <param name="htmlContent">Html格式的二进制流</param>
        /// <returns>Mht格式的二进制流</returns>
        public byte[] ConvertHtmlBytesToMht(byte[] htmlContent)
        {
            string strMhtContent = string.Empty;
            string strHtmlContent =  Encoding.Default.GetString(htmlContent);
            CDO.Message  message = new CDO.MessageClass();
            ADODB.Stream  stream=null;
            message.MimeFormatted =true;
            message.HTMLBody = strHtmlContent;
            stream = message.GetStream();
            stream.Charset = _CharSet;
            strMhtContent= stream.ReadText(stream.Size);
            byte[] BytMhtContent = Encoding.GetEncoding(_CharSet).GetBytes(strMhtContent);
            return BytMhtContent;
        }
        
        /// <summary>
        /// 根据输入的Html文本内容(二进制)返回Mht文本内容(二进制流),成功返回true,失败返回false
        /// </summary>
        /// <param name="htmlContent">Html格式的二进制流</param>
        /// <param name="filePath">Mht文件的保存路径</param>
        /// <returns>操作结果 成功:true,失败;false</returns>
        public bool ConvertHtmlBytesToMht(byte[] htmlContent,string filePath)
        {
            bool isConvertHtmlBytesToMht = false;
            string strHtmlContent =  Encoding.GetEncoding(_CharSet).GetString(htmlContent);
            CDO.Message  message = new CDO.MessageClass();
            ADODB.Stream  stream=null;
            message.MimeFormatted =true;
            message.HTMLBody = strHtmlContent;
            stream = message.GetStream();
            stream.Charset = _CharSet;
            string strMhtContent= stream.ReadText(stream.Size);
            byte[] BytMhtContent = Encoding.GetEncoding(_CharSet).GetBytes(strMhtContent);
            FileStream fileStream = new FileStream(filePath,FileMode.Create,FileAccess.Write);
            fileStream.Write(BytMhtContent,0,BytMhtContent.Length);
            message=null;
            stream.Close();
            isConvertHtmlBytesToMht=true;
            return isConvertHtmlBytesToMht;
        }
        
        /// <summary>
        /// 根据输入的Html文本内容(字符串)返回Mht文本内容(二进制流)
        /// </summary>
        /// <param name="htmlContent">Html文本内容(字符串)</param>
        /// <returns>Mht格式的二进制流</returns>
        public byte[] ConvertHtmlTextToMht(string htmlContent)
        {
            string strMhtContent = String.Empty;
            CDO.Message  message = new CDO.MessageClass();
            ADODB.Stream  stream=null;
            message.MimeFormatted =true;
            message.HTMLBody = htmlContent;
            stream = message.GetStream();
            stream.Charset = _CharSet;
            strMhtContent= stream.ReadText(stream.Size);
            byte[] bytMhtContent = Encoding.GetEncoding(_CharSet).GetBytes(strMhtContent);
            return bytMhtContent;
        }
        
    /// <summary>
        /// 根据输入的Html文本内容(字符串)返回Mht文本内容(二进制流),成功返回true,失败返回false
        /// </summary>
        /// <param name="htmlContent">Html文本内容(字符串)</param>
        /// <param name="filePath">Mht文件的保存路径</param>
        /// <returns>操作结果:成功:true,失败:false</returns>
        public bool ConvertHtmlTextToMht(string htmlContent,string filePath)
        {
            bool isConvertHtmlBytesToMht = false;
            CDO.Message  message = new CDO.MessageClass();
            ADODB.Stream  stream=null;
            message.MimeFormatted =true;
            message.HTMLBody = htmlContent;
            stream = message.GetStream();
            stream.Charset = _CharSet;
            string strMhtContent= stream.ReadText(stream.Size);
            byte[] BytMhtContent = Encoding.GetEncoding(_CharSet).GetBytes(strMhtContent);
            FileStream fileStream = new FileStream(filePath,FileMode.Create,FileAccess.Write);
            fileStream.Write(BytMhtContent,0,BytMhtContent.Length);
            message=null;
            stream.Close();
            isConvertHtmlBytesToMht=true;
            return isConvertHtmlBytesToMht;
        }
        #endregion
        
    } // class HtmlConvertToMhtByCdo
    #endregion
    
} // HTMLConversion