将字符串写入到图片中.

1 换行采用指定写入位置来实现

2 务必释放资源,否则会出现Win32Error 

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                //前一页面传递过来的参数
                string email = Request.QueryString.Get("email");
                string realName = new OLUserService.OLUserService().GetRealNameByEmail(email);
                string workid = new OLUserService.OLUserService().GetWorkIdByEmail(email);//image1图片控件-呈现写入字符串后的图片
                string fileName = this.image1.ImageUrl;
                int index = fileName.LastIndexOf(".");string newFileName = fileName.Substring(0, index) + "_" + realName + fileName.Substring(index);
                FileInfo fileInfo = new FileInfo(Server.MapPath(fileName));
                fileInfo.CopyTo(Server.MapPath(newFileName), true);

                System.Drawing.Image image