Question

我需要从视图到控制器的id选择项目，然后将项目发送到另一个视图。我的第一个视图，即我将项目的ID发送到编辑操作：

 @foreach (var item in Model)
    {
            <tr>
                <td>
                    @Html.Raw("<img style='width:80px; height:60px;' src=\"data:image/jpeg;base64,"
                                + Convert.ToBase64String(item.Image) + "\" />")
                </td>
                <td>
                    @Html.ActionLink("Edit", "Edit", "Personal", new { id = item.Id }, null)
                </td>
                <td>
                    @Html.ActionLink("Remove", "Delete", "Personal", new { id = item.Id}, null)
                </td>
            </tr>
    }

我的修改操作

 public ActionResult Edit(int id)
    {
        ApplicationUser au = db.Users.Find(User.Identity.GetUserId());
        Picture pic = new Picture();
        foreach (var item in au.Pictures)
        {
            if (id == item.Id)
            {
                pic = item;
            }
        }
        //Picture pic = new Picture { Id = id, Image = image};
        return View(pic);
    }

并查看等待项目

@model Dip_prj1.Models.Picture
@using Microsoft.AspNet.Identity
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Edit</title>
</head>
<body>
    <div> 
             @Html.Raw("<img style='width:80px; height:60px;' src=\"data:image/jpeg;base64,"
                                + Convert.ToBase64String(Model.Image) + "\" />")>
    </div>
    <div>
        @Html.ActionLink("Вернуться к списку", "UserDetails", "Personal", new { id = User.Identity.GetUserId() }, null)
    </div>
</body>
</html>

编辑控制器出现问题，导致我发送空字节数组的错误写入。请帮帮我。

Answer 1

所有人都在帮助，问题在于制作应用程序用户类型对象，我忘了将部分放在必须从另一个表加载集合的地方。它应该像

ApplicationUser au = db.Users.Include(t => t.Pictures).FirstOrDefault(t => (t.Id) == user);
This Include was clue

不能从EF

1 个答案: