Question

我在我的视图中有这个Dropdownlist，它从我的数据库读取，它当前读取正确的东西，但它只读取每个字符。例如，如果我有＆＃34; ATL＆＃34;作为我位置表中的位置，我将得到3个项目的下拉列表＆＃34; A＆＃34;，＆＃34; T＆＃34;，＆＃34; L＆＃34;而不只是一个项目＆＃34; ATL＆＃34;。

我尝试过只使用常规@Html.DropDownList并让DDL看起来不错，但我一直得到"System.Data.Entity.DynamicProxies.Location.VYFY456886V..."和＃34; ATL＆＃34;在我的DDL中最终得到2个项目，即使我的表中有1个项目，我也无法找到如何摆脱奇怪的"System.Data"事物。

所以我认为使用DropDownListFor()对我的数据库会更好，因为它在我的DDL中没有给我"System"这个东西。

这是我的控制器：

public ActionResult TakeInventory()
{
    CTS_InventoryEntities entities = new CTS_InventoryEntities();
    return View(from Asset in entities.Assets select Asset)     
}

我有一张名为＆＃34; Asset＆＃34;和一个名为＆＃34; Location＆＃34;的表。 Asset表具有Location表（LocationKey）中的FK。

这是我的观点：

@model IEnumerable<CTS_Inventory.Models.Asset>    
@foreach (var item in Model)
{
    <div class="row"> 
        <div class="col-md-6">
            <label>Item: </label>
            @Html.TextBoxFor(m => item.AssetKey, new { @placeholder = "Enter Asset Tag", @Value = "" })
        </div>
        <div class="col-md-6">
            <label>Inventory Owner: </label>
            @Html.TextBoxFor(m => item.InventoryOwner)
        </div>
        <div class="col-md-6">
            <label>Location: </label>
            @Html.DropDownListFor(m => item.Location, new SelectList (item.Location.LocationName))
        </div>
    </div>
}

我只是试图从DDL中选择LocationName而不将其分解为单独的字符。任何帮助将不胜感激。我已经坚持了很长一段时间。谢谢

编辑：

我的AssetViewModel：

public partial class Asset
    {
        public int AssetKey { get; set; }
        public int ProductKey { get; set; }
        public int ManufacturerKey { get; set; }
        public int ModelKey { get; set; }
        public int LocationKey { get; set; }
        public int ClientSiteKey { get; set; }
        public string SerialNumber { get; set; }
        public string ItemName { get; set; }
        public string PurchaseDate { get; set; }
        public string InventoryOwner { get; set; }
        public string InventoriedBy { get; set; }
        public System.DateTime InventoryDate { get; set; }
        public bool IsDisposed { get; set; }

        public virtual ClientSite ClientSite { get; set; }
        public virtual Location Location { get; set; }
        public virtual Manufacturer Manufacturer { get; set; }
        public virtual Model Model { get; set; }
        public virtual Product Product { get; set; }
    }

我的LocationViewModel：

 public partial class Location
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        public Location()
        {
            this.Assets = new HashSet<Asset>();
        }

        public int LocationKey { get; set; }
        public IEnumerable <SelectListItem> LocationName { get; set; }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<Asset> Assets { get; set; }
    }

更新：

控制器：

public ActionResult ViewInventory()
        {
            CTS_InventoryEntities entities = new CTS_InventoryEntities();
            ViewBag.LocationKey = new SelectList(entities.Locations, "LocationKey", "LocationName");
            ViewBag.ClientSiteKey = new SelectList(entities.ClientSites, "ClientSiteKey", "ClientSiteName");
            return View();

LocationViewModel：

public partial class LocationViewModel
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        public LocationViewModel()
        {
            this.Assets = new HashSet<Asset>();
        }
        public int LocationKey { get; set; }
        public string LocationName { get; set; }
        public int LocationList { get; set; }
        public int ClientSiteKey { get; set; }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<Asset> Assets { get; set; }
    }

更新2：

将此添加到我的LocationViewModel：

public IEnumerable<SelectListItem> LocationList { get; set; }
public string LocationSelected { get; set; }

将此添加到我的控制器：

CTS_InventoryEntities entities = new CTS_InventoryEntities();
            LocationViewModel model = new LocationViewModel()

            {
                LocationList = new SelectList(entities.Locations,"LocationKey","LocationName")
            };

将此添加到我的视图中：

<label>Location: </label>
            @Html.DropDownListFor(m => m.LocationSelected,Model.LocationList)

Answer 1

请做一件事。

首先从数据库创建SelectLsitItem列表并填写lt。

 public List<SelectListItem> GetCity(ref string StateCode, string ZipCode)
        {
            List<SelectListItem> lstCity = new List<SelectListItem>();
            try
            {

                SqlParameter[] parameters = { new SqlParameter("@StateCode", StateCode), new SqlParameter("@ZipCode", ZipCode) };
                DataSet dsCity = SqlHelper.ExecuteDataset(CommandType.StoredProcedure, "GetCityByStateCodeZipCode", parameters);

                if (dsCity != null && dsCity.Tables.Count > 0 && dsCity.Tables[0].Rows.Count > 0)
                {
                    lstCity = (from drCity in dsCity.Tables[0].AsEnumerable()
                                                  select new SelectListItem { Text = drCity["City"].ToString(), Value = drCity["City"].ToString() }).ToList();

                    if (string.IsNullOrEmpty(StateCode))
                    {
                        StateCode = dsCity.Tables[0].Rows[0]["StateCode"].ToString();
                    }

                }
                return lstCity;
            }
            catch (Exception ex)
            {
                return lstCity;
            }
        }

将SelectLsitItem存储到viewbag中后。

ViewBag.GLDeductible=GetCity("A","B");

将该视图包分配到下拉列表后。

@Html.DropDownListFor(Model => Model.otherLimitsMappingModel.DamageToPremises, ViewBag.GLDeductible as IEnumerable<SelectListItem>})

这对你有用。

如果你卡在我的代码中，请告诉我，我会帮助你。

感谢。

MVC @ Html.Dropdownlist不返回列表中的正确值

1 个答案: