Gridview-在集合内绑定一个集合

问题描述

Class Section
    List<Group> groupList

Class Group
   List<Products> productList
   Group ID
   Group Name

Class Product
   Product ID
   Product Name
   Product Details

使用C＃、. NET 4.0，如何将这些数据绑定到GridView，以便具有这种格式

G1_Name
       P1_Name   P1_Details
       P2_Name   P2_Details
G2_Name
       P3_Name   P3_Details
       P4_Name   P4_Details

谢谢     

解决方法

一种解决方案（很多）： 一个GridView，它是绑定到组列表的数据 包含包含数据绑定列表控件的TemplateField（例如，

Repeater

，

DataList

或evan另一个

GridView

）。 数据绑定列表控件的DataSource属性绑定到Group.ProductList属性的位置： 。

<asp:GridView ...>
    <Columns>
        <asp:TemplateField ...>
            <ItemTemplate>
                <asp:Repeater ... DataSource=\'<%# Eval(\"ProductList\")) %>\'>
                    <ItemTemplate>
                         ... controls bound to Product properties
                     </ItemTemplate>
                 </asp:Repeater>
             </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

    ,听起来您正在尝试绑定分层集合。根据您的描述，我建议您使用ListView而不是GridView。您将在数据显示方面获得更多控制和灵活性。但是，选择是您自己的，并且可以轻松修改以下代码以在GridView中使用。 该代码将产生以下结构： ASPX

<asp:ListView runat=\"server\" ID=\"listView\">
        <LayoutTemplate>
            <ul><asp:PlaceHolder ID=\"itemPlaceholder\" runat=\"server\"></asp:PlaceHolder></ul>
        </LayoutTemplate>
        <ItemTemplate>
            <li><%# Eval(\"GroupName\") %>
                <asp:ListView runat=\"server\" DataSource=\'<%# Eval(\"productList\")%>\'>
                    <LayoutTemplate>
                        <ul><asp:PlaceHolder ID=\"itemPlaceholder\" runat=\"server\"></asp:PlaceHolder></ul>
                    </LayoutTemplate>
                    <ItemTemplate>
                        <li><%# Eval(\"ProductName\") %> - Details: <%# Eval(\"ProductDetails\") %></li>
                    </ItemTemplate>
                </asp:ListView>
            </li>
        </ItemTemplate>
    </asp:ListView>

C＃

        public class Section
        {
            public List<Group> groupList { get; set; }
        }

        public class Group
        {
            public List<Product> productList { get; set; }
            public int GroupID { get; set; }
            public string GroupName { get; set; }
        }

        public class Product
        {
            public int ProductID { get; set; }
            public string ProductName { get; set; }
            public string ProductDetails { get; set; }
        }

        Section section = new Section { groupList = new List<Group>() };

        Group group = new Group { GroupID = 1,GroupName = \"Fruits\",productList = new List<Product>() };
        Product product = new Product { ProductID = 1,ProductName = \"Apples\",ProductDetails = \"On Sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 2,ProductName = \"Oranges\",ProductDetails = \"Not on Sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 3,ProductName = \"Pears\",ProductDetails = \"Big Spender Sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 4,ProductName = \"Grapes\",ProductDetails = \"Not on Sale\" };
        group.productList.Add(product);

        section.groupList.Add(group);

        group = new Group { GroupID = 2,GroupName = \"Vegetables\",productList = new List<Product>() };
        product = new Product { ProductID = 5,ProductName = \"Carrots\",ProductDetails = \"Not on Sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 6,ProductName = \"Celery\",ProductDetails = \"Last week only\" };
        group.productList.Add(product);
        product = new Product { ProductID = 7,ProductName = \"Eggplant\",ProductDetails = \"Big Spender Sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 8,ProductName = \"Oniones\",ProductDetails = \"N/A\" };
        group.productList.Add(product);

        section.groupList.Add(group);

        group = new Group { GroupID = 3,GroupName = \"Meat\",productList = new List<Product>() };
        product = new Product { ProductID = 9,ProductName = \"Beef\",ProductDetails = \"On Sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 10,ProductName = \"Pork\",ProductDetails = \"Back for two weeks\" };
        group.productList.Add(product);
        product = new Product { ProductID = 11,ProductName = \"Chicken\",ProductDetails = \"On sale\" };
        group.productList.Add(product);
        product = new Product { ProductID = 12,ProductName = \"Turkey\",ProductDetails = \"Going fast\" };
        group.productList.Add(product);

        section.groupList.Add(group);

        listView.DataSource = section.groupList;
        listView.DataBind();
    }