使用数组在ASP.NET MVC中的模型中添加新条目

Shihan Khan 发表于 Dev

施汉汗

我正在使用asp.net mvc 4和Entity Framework 6创建一个网站，可以在其中将数据存储在MSSQL数据库中。我想创建一个函数，以复制具有不同ID的条目。我想将这些复制的值放入数组中，并将其推入模型中，以使后端处理更快。但是我不确定该怎么做。

这是我的代码：

    public ActionResult FlatCopy(FlManagement FlTable, int FlId = 0)
    {
        var getOwner = rentdb.OwnerRegs.Where(a => a.username == User.Identity.Name).FirstOrDefault();
        var getId = getOwner.serial;
        var getLimit = getOwner.limit;
        var getPosted = getOwner.posted;

        FlInfo model = FlTable.Flats;
        if (ModelState.IsValid)
        {
            if (getLimit != 0)
            {
                try
                {
                    getOwner.limit = getLimit - 1;
                    getOwner.posted = getPosted + 1;
                    var dbPost = rentdb.FlatInfoes.Where(p => p.serial == FlId).FirstOrDefault();
                    if (dbPost == null)
                    {
                        TempData["flat_edit_fail"] = "Error! Information update failed!";
                        return RedirectToAction("FlatManager", new { FlPanelId = "AllFl" });
                    }
                    model.flatno = "Copy of " + dbPost.flatno;
                    model.type = dbPost.type;
                    model.owner_id = getId;
                    model.t_id = 0;
                    model.t_name = "N/A";
                    model.t_phone = "N/A";
                    model.basic = dbPost.basic;
                    model.electric = dbPost.electric;
                    model.gas = dbPost.gas;
                    model.water = dbPost.water;
                    model.total = dbPost.total;
                    model.advancerent = dbPost.advancerent;
                    model.currency = dbPost.currency;
                    model.title = dbPost.title;
                    model.status = "N/A";
                    db.FlatInfoes.Add(model);
                    db.SaveChanges();

                    TempData["success"] = "Information Added Successfully!";
                    return RedirectToAction("FlManager", new { FlPanelId = "AllFl" });
                }
                catch
                {
                    TempData["fail"] = "Error! Please Provide Valid Information.";
                    return RedirectToAction("FlManager", new { FlPanelId = "AllFl" });
                }
            }
            else
            {
                TempData["fail"] = "You've reached your post limit!";
                return RedirectToAction("FlManager", new { FlPanelId = "AllFl" });
            }
        }
        else
        {
            TempData["fail"] = "Error! Please Provide Valid Information.";
            return RedirectToAction("FlManager", new { FlPanelId = "AllFl" });
        }
    }

如何将值放入数组中并将数组推入模型中以添加新条目？

Mohammad Akbari |

您可以将实体与DbContext分离，然后将其重新添加到EntityCollection中。

rentdb.Entry(dbPost).State = EntityState.Detached;
rentdb.FlatInfoes.Add(dbPost);

解决方案2 ：（更好）

var model = new FlInfo();
rentdb.FlatInfoes.Add(model);
var sourceValues = rentdb.Entry(dbPost).CurrentValues;
rentdb.Entry(model).CurrentValues.SetValues(sourceValues);
rentdb.SaveChanges();

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