Du kan lige få et par forskellige modeller:
// aspx:
<body>
<form id="form1" runat="server">
<asp:DataList DataKeyField="SomeNumber" ID="DataList1" runat="server" DataSourceID="SomeDataSource" OnItemDataBound="DataList1_ItemDataBound">
<ItemTemplate>
SomeText:
<asp:Label ID="SomeTextLabel" runat="server" Text='<%# Eval("SomeText") %>'></asp:Label><br />
SomeNumber:
<asp:Label ID="InnerDataLabel" runat="server" Text='<%# Eval("SomeNumber") %>'></asp:Label><br />
<br />
<asp:GridView ID="SomeGridView" runat="server">
</asp:GridView>
<br />
</ItemTemplate>
</asp:DataList>
<asp:ObjectDataSource
ID="SomeDataSource"
runat="server"
SelectMethod="GetNestedData"
TypeName="DataAccess">
</asp:ObjectDataSource>
<hr />
<asp:DataList DataKeyField="SomeNumber" ID="DataList2" runat="server" DataSourceID="SomeDataSource" OnItemDataBound="DataList1_ItemDataBound">
<ItemTemplate>
SomeText:
<asp:Label ID="SomeTextLabel" runat="server" Text='<%# Eval("SomeText") %>'></asp:Label><br />
SomeNumber:
<asp:Label ID="InnerDataLabel" runat="server" Text='<%# Eval("SomeNumber") %>'></asp:Label><br />
<br />
<asp:GridView ID="SomeGridView" runat="server">
</asp:GridView>
<br />
</ItemTemplate>
</asp:DataList>
<asp:ObjectDataSource
ID="SomeOtherDataSource"
runat="server"
SelectMethod="GetChildren"
TypeName="DataAccess">
<SelectParameters>
<asp:ControlParameter
ControlID="DataList2"
Name="someNumber"
PropertyName="SelectedValue"
Type="Int32" />
</SelectParameters>
</asp:ObjectDataSource>
</form>
</body>
// lidt kode til den første liste:
protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
GridView grid = e.Item.FindControl("SomeGridView") as GridView;
grid.DataSource = ((ParentData)e.Item.DataItem).InnerData;
grid.DataBind();
}
}
// og så du har lidt data at arbejde med
public class Data
{
private string m_SomeText = "Default text";
private int m_SomeNumber = 100;
public string SomeText
{
get { return m_SomeText; }
set { m_SomeText = value; }
}
public int SomeNumber
{
get { return m_SomeNumber; }
set { m_SomeNumber = value; }
}
public Data(int someNumber, string someText)
{
m_SomeNumber = someNumber;
m_SomeText = someText;
}
}
public class ParentData
{
private List<Data> m_InnerData;
private string m_SomeText = "Default text";
private int m_SomeNumber = 100;
public List<Data> InnerData
{
get { return m_InnerData; }
set { m_InnerData = value; }
}
public string SomeText
{
get { return m_SomeText; }
set { m_SomeText = value; }
}
public int SomeNumber
{
get { return m_SomeNumber; }
set { m_SomeNumber = value; }
}
public ParentData(int someNumber, string someText)
{
this.m_SomeNumber = someNumber;
this.m_SomeText = someText;
m_InnerData = new List<Data>();
m_InnerData.Add(new Data(1, String.Format("A{0}", someNumber)));
m_InnerData.Add(new Data(2, String.Format("A{0}", someNumber)));
m_InnerData.Add(new Data(3, String.Format("A{0}", someNumber)));
}
}
public static class DataAccess
{
public static List<ParentData> GetNestedData()
{
List<ParentData> data = new List<ParentData>();
data.Add(new ParentData(1, "PA"));
data.Add(new ParentData(2, "PB"));
data.Add(new ParentData(3, "PC"));
return data;
}
public static List<Data> GetChildren(int someNumber)
{
return GetNestedData().Find(
delegate(ParentData data)
{
if (data.SomeNumber == someNumber)
return true;
return false;
}).InnerData;
}
}
I første eksempel udnyttes det, at de data der skal vises i innerlisten kan hentes direkte fra det objekt der danner grundlag for det ydre item, og i det andet eksempel hentes innerdata med et seperat kald (selvom de sådan set er til rådighed i forvejen :o).
Det er det sidste eksempel du har spurgt til såvidt jeg tolker dit spørgsmål.
Og ... læg i for meget i koden ... Det er kun ment som en illustration.
Mvh
