c# - 将数据从 BLL 检索到标签

Question

我对从 ListPageObj 传递值以在标签上显示值有疑问。我怎样才能获得价值？

BLL

public List<ListPageObj> MyList(int ItemID)
        {
            return (from a in ctx.Item where a.ItemID == ItemIDselect new ListPageObj
            {
                Item1= a.Item1,
                Item2= a.Item2,
                Item3= a.Item3
            }).ToList<ListPageObj>();
        }

列表页对象

public string Item1
    { get; set; }

    public string Item2
    { get; set; }

    public string Item3
    { get; set; }

aspx

<asp:label id="label1" runat="server" />
<asp:label id="label2" runat="server" />
<asp:label id="label3" runat="server" />

aspx.cs ?

 //code to retrieve item1, item2, item3 value from BLL
 label1.Text = ListPageObj.Item1; // gives me null value
 label2.Text = ListPageObj.Item2; // gives me null value
 label3.Text = ListPageObj.Item3; // gives me null value

Answer 1

aspx.cs 页面

ListPageObj ObjItem = ClassName.MyList(ItemID);

label1.Text = ObjItem.Item1; 
label2.Text = ObjItem.Item2; 
label3.Text = ObjItem.Item3; 

BLL

public ListPageObj MyList(int ItemID)
        {
            return (from a in ctx.Item where a.ItemID == ItemIDselect new ListPageObj
            {
                Item1= a.Item1,
                Item2= a.Item2,
                Item3= a.Item3
            }).FirstOrDefault();
        }