当我尝试使用以下内容在Details页面模板中显示byte []数组图像时:
public FileContentResult RenderPhoto(byte[] photo)
{
// var array = (byte[])Session["photo"];
// return File(array, "image/jpeg");
return File(photo, "image/jpeg");
}
<img src="@Url.Action("RenderPhoto", Model.Photo)"/>
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照片为空.
如果我在会话中存储student.Photo:
//
// GET: /Student/Details/5
public ViewResult Details(int id)
{
Student student = db.Students.Find(id);
Session["photo"] = student.Photo;
return View(student);
}
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并尝试显示从Session(上面的注释行)中检索值的图像.
为什么我在第一种情况下获得空值?
将学生传递给View in后ViewResult Details(int id),Model.Photo不再保留该值了吗?