如何将自定义对象的数据表绑定到GridView [英] How to bind DataTable of custom objects to GridView

问题描述

我有一个包含由ID链接的其他两个自定义对象列表的列表。本质上，我有一个具有许多属性的 CPDActivity对象和一个具有多个属性的 CPDActivityExtended对象。然后，我有一个 CPDActivityComplete对象，其中包含每个其他对象。这些完整的对象将添加到填充DataTable的列表中。

I have a list comprising of two other lists of custom objects that are linked by an Id. Essentially I have an 'CPDActivity' object that has many properties and an 'CPDActivityExtended' object with several more. I then have a 'CPDActivityComplete' object that contains one each of the other objects. These complete objects get added to a list which is what populates a DataTable.

我需要能够将此DataTable绑定到GridView并显示的属性值CPDActivityComplete的两个子对象。例如， A列下的CPDActivityComplete.CPDActivity.A。

I need to be able to bind this DataTable to a GridView and display the values of the properties of the CPDActivityComplete's two child objects. For example CPDActivityComplete.CPDActivity.A under an 'A' column.

这是我要执行的操作的基本图片：

Here is a basic picture of what I'm trying to do:

可视化的自定义对象列表：

The list of custom objects visualised:

到目前为止我已经尝试过：

What I have tried so far:

使用实体框架& LINQ和我已将GridView绑定到生成的数据表：

The DataTables are populated using Entity Framework & LINQ and I have bound the GridView to the resulting DataTable:

DataTable dt = getCPDData.ToDataTable<CPDActivityComplete>(cpdActivityCompleteList);
cpd_gv_activities.DataSource = dt;
cpd_gv_activities.DataBind();

我有一个简单的GridView可以进行测试：

I have a simple GridView to test things out:

<asp:GridView ID="cpd_gv_activities" runat="server" AutoGenerateColumns="false" AllowPaging="True" PageSize="15">
<Columns>
    <asp:TemplateField HeaderText="Full Name">
        <ItemStyle CssClass="fixedcell"></ItemStyle>
        <ItemTemplate>
            <asp:Label ID="vd_gv_lbl_FullName" runat="server" Text='<%# Bind("CPDActivity.A") %>'></asp:Label>
        </ItemTemplate>   
    </asp:TemplateField>
</Columns>

但这会导致错误：

DataBinding: 'System.String' does not contain a property with the name 'A'.

如何将label.text绑定到CPDActivityExtended.CPDActivity.A属性？

How do I bind the label.text to CPDActivityExtended.CPDActivity.A property?

推荐答案

切换到强类型GridView。然后，您可以轻松访问所有属性和类型安全性。

Switch to a strongly typed GridView. Then you have easy access to all the properties and type-safety.

因此，首先将 ItemType 添加到GridView中。

So first add the ItemType to the GridView

<asp:GridView ID="cpd_gv_activities" runat="server" ItemType="YourNameSpace.CPDActivityComplete">

现在您可以在GridView中使用 Item 和访问属性

Now you can use Item in the GridView and access properties

<asp:Label ID="vd_gv_lbl_FullName" runat="server" Text='<%# Item.A %>'></asp:Label>

最后，不要转换为DataTable（首先不需要），而是绑定

And last, don't convert to a DataTable (was not needed in the first place) but bind the List with the class directly.

cpd_gv_activities.DataSource = cpdActivityCompleteList;
cpd_gv_activities.DataBind();

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