通用的上传(图片,文件)方法

【File Field控件】上传图片的同时直接显示图片的属性设置方法
1.添加一个图片控件。

2.设置File Field控件属性<INPUT id="File1"  onkeydown="return false"  onpropertychange="img1.src = File1.value" type="file"  runat="server">                  

【注】：img1是图片控件的id,onkeydown="return false"控制在File Field控件中输入内容,onpropertychange="img1.src = File1.value" type="file"就是实现上传图片的同时直接显示图片的属性设置方法

public void ObjectToFile(ExportObject obj)
        {
            string strFilename = "DHBCCMS_" + obj.ClassType + "_";
            strFilename = string.Format("{0}{1}{2}{3}",strFilename,Util.GetYear(), Util.GetMonth(), Util.GetDay());
            strFilename = strFilename + ".dat";

            BinaryFormatter formatter = new BinaryFormatter();
            string p = Server.MapPath("/export/");
            Stream stream = new FileStream(Server.MapPath("/export/") + strFilename,
                                           FileMode.Create,
                                           FileAccess.Write,
                                           FileShare.None);

            // string strHash = "DHBCCMS";
            try
            {
                formatter.Serialize(stream, obj);
                // formatter.Serialize(stream, strHash);
            }
            catch(Exception ex)
            {
                string msg = ex.Message;
            }
            finally
            {
                stream.Close();
                formatter = null;
            }
        }
要导出哪个对象，就往里传。