word中如何显示base64编码的图片

发布网友发布时间：2022-04-25 06:08

共2个回答

热心网友时间：2022-05-12 10:25

输出html 格式，放歌img 标签，1先把base64编码转为图片，再生成world.
/// <summary>
        /// base64编码的文本转为图片
        /// </summary>
        /// <param name="txtFilePath">文件相对路径(存到服务器上)</param>
        /// <param name="str">图片字符串</param>
        private void Base64StringToImage(string txtFilePath, string str)
        {
            try
            {
                String inputStr = str;
                byte[] arr = Convert.FromBase64String(inputStr);
                MemoryStream ms = new MemoryStream(arr);
                Bitmap bmp = new Bitmap(ms);

                bmp.Save(System.Web.HttpContext.Current.Server.MapPath(txtFilePath) + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
                //bmp.Save(txtFileName + ".bmp", ImageFormat.Bmp);
                //bmp.Save(txtFileName + ".gif", ImageFormat.Gif);
                //bmp.Save(txtFileName + ".png", ImageFormat.Png);
                ms.Close();
                //imgPhoto.ImageUrl = txtFilePath + ".jpg";
                //MessageBox.Show("转换成功！");
            }
            catch (Exception ex)
            {

            }
        }

public void ExportControl(System.Web.UI.Control source, string DocumentType, string filename)
   {
       //设置Http的头信息,编码格式
       HttpContext.Current.Response.Buffer = true;
       HttpContext.Current.Response.Clear();
       HttpContext.Current.Response.ClearContent();
       HttpContext.Current.Response.ClearHeaders();
       if (DocumentType.ToLower() == "excel")
       {
           //Excel
           HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(filename + ".xls", System.Text.Encoding.UTF8));
           HttpContext.Current.Response.ContentType = "application/ms-excel";
       }
       else if (DocumentType.ToLower() == "word")
       {
           //Word
           HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(filename + ".doc", System.Text.Encoding.UTF8));
           HttpContext.Current.Response.ContentType = "application/ms-word";
       }
       HttpContext.Current.Response.Charset = "UTF-8";
       HttpContext.Current.Response.HeaderEncoding=System.Text.Encoding.UTF8;
       HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
       //关闭控件的视图状态
       source.Page.EnableViewState = false;
       //初始化HtmlWriter
       System.IO.StringWriter writer = new System.IO.StringWriter();
       System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(writer);
       source.RenderControl(htmlWriter);
       //输出
       HttpContext.Current.Response.Write(writer.ToString());
       HttpContext.Current.Response.End();
   }

追问

非常感谢，但是我为什么在第二步保存进 byte[] arr = Convert.FromBase64String(inputStr);的时候报错呢？

我的base64是前台使用获取的，在前台写了一个隐藏的控件，然后在后台获取的控件值



追答你百度那个错误信息，找下解决方案。

热心网友时间：2022-05-12 11:43

word中不能直接显示base64编码的字符串为图片哦，可以先base64编码的字符串转为图片，然后把图片插word文档即可。http://www.it399.com/m/image/base64
，使用这个在线工具可以进行base64转图片，望采纳，谢谢！