crm与移动app（andriod和ios）图片的查看与保存

//移动端图片的查看（将图片的路径返回给移动端）                        

string filname = annotationqueColletionEntities.Attributes["filename"].ToString().Replace(" ", ""); ;
 byte[] array = Convert.FromBase64String(annotationqueColletionEntities.Attributes["documentbody"].ToString());
                                MemoryStream mymemorystream = new MemoryStream(array);
                                Image image = Image.FromStream(mymemorystream, true);
                                image.Save("服务器上保存图片的路径" + filname + "");
                                 Image = "webservice的url" + filname + "";                     
                                //媒体类型
                                pictureall.mimetype = annotationqueColletionEntities.Attributes["mimetype"].ToString();

//crm端保存图片到数据库中

                        Entity annotation = new Entity("annotation");
                        annotation["subject"] = 图片的主题;
                        annotation["filename"] = "图片名称.jpg";
                        annotation["documentbody"] = PictureBinary;                      
                        annotation["mimetype"] = "image/jpeg";
                        var annotationId = organizationServiceProxy.Create(annotation);
                        EntityReferenceCollection coll = new EntityReferenceCollection();
                        coll.Add(new EntityReference("annotation", annotationId));
                        organizationServiceProxy.Associate("图片关联的实体", outregisterid, new Relationship("关系名称"), coll);