C# 导出word 和中文乱码

   protected void btnWord_Click(object sender, EventArgs e)
        {
            string strSql = "SELECT语句filename";
            string filename = this.Sql.GetString(strSql) + DateTime.Now.ToString("yyyyMMdd");
            strSql = "SELECT 主循环";
            DataTable dt = GetDataTable(strSql);
            if (dt.Rows.Count == 0 || dt == null)
            {
                this.MsgBox("读取数据失败！");
                return;
            }
			//这块就像html里面类似
            Response.ContentType = "application/msword";
            Response.ContentEncoding = System.Text.Encoding.UTF8;
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + ToHexString(filename) + ".doc");//ToHexString(filename)防止中文乱码
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                strSql = "SELECT 子循环";
                DataTable dtview = this.Sql.GetDataTable(strSql);
                if (dtview.Rows.Count > 0)
                {
                    sb.Append("");
                    sb.Append("");
                    sb.AppendFormat("", dt.Rows[i]["列名"].ToString(), dt.Rows[i]["列名"].ToString(), dt.Rows[i]["列名"].ToString());
                    sb.AppendFormat("
Tilte公司
Title标题
作业:{0}
单位:{1}
编号:{2}
日 期:{0}
期间:{1}
", DateTime.Parse(dtview.Rows[0]["列名"].ToString()).ToString("yyyy-MM-dd"), dt.Rows[i]["列名"].ToString());
                    sb.Append("");
                    for (int j = 0; j < dtview.Rows.Count; j++)
                    { 
                        sb.AppendFormat("", (j + 1).ToString() + "." + dtview.Rows[j]["列名"].ToString());
                        switch (int.Parse(dtview.Rows[j]["lngrule"].ToString()))
                        {
                            case 1:
                                sb.AppendFormat("", "√");
                                break;
                            case 2:
                                sb.AppendFormat("", "√");
                                break;
                            case 3:
                                sb.AppendFormat("", "√");
                                break;
                        }
                        sb.AppendFormat("", dtview.Rows[j]["列名"].ToString());
                        sb.Append("");
                    }
                    sb.Append("
重  点
标 准
结果
是
否
不适用
{0}
{0}
{0}
{0}
{0}
");
                    sb.Append("");
                }
            }
            Response.Write(sb.ToString());
            Response.End();
        }
		
		
		#region 保存word中文名称乱码
        /// 
  
        /// 为字符串中的非英文字符编码  
        /// 
  
        ///   
        ///   
        public string ToHexString(string s)
        {
            char[] chars = s.ToCharArray();
            StringBuilder builder = new StringBuilder();
            for (int index = 0; index < chars.Length; index++)
            {
                bool needToEncode = NeedToEncode(chars[index]);
                if (needToEncode)
                {
                    string encodedString = ToHexString(chars[index]);
                    builder.Append(encodedString);
                }
                else
                {
                    builder.Append(chars[index]);
                }
            }
            return builder.ToString();
        }

        /// 
  
        ///指定 一个字符是否应该被编码  
        /// 
  
        ///   
        ///   
        private bool NeedToEncode(char chr)
        {
            string reservedChars = "$-_.+!*'(),@=&";
            if (chr > 127)
                return true;
            if (char.IsLetterOrDigit(chr) || reservedChars.IndexOf(chr) >= 0)
                return false;
            return true;
        }

        /// 
  
        /// 为非英文字符串编码  
        /// 
  
        ///   
        ///   
        private string ToHexString(char chr)
        {
            UTF8Encoding utf8 = new UTF8Encoding();
            byte[] encodedBytes = utf8.GetBytes(chr.ToString());
            StringBuilder builder = new StringBuilder();
            for (int index = 0; index < encodedBytes.Length; index++)
            {
                builder.AppendFormat("%{0}", Convert.ToString(encodedBytes[index], 16));
            }
            return builder.ToString();
        }
        #endregion