关于论坛分类与分论坛的显示的问题

把DataList1的AutoPostBack属性设为true
DataList1.DataSource = ds;
this.category.DataTextField = "要显示的列名";
DataList1.DataValueField = "id";
String lsid = Convert.ToInt32( this.DataList1.SelectedValue );
DataList1.DataBind();

解决方案 »

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<%@ Page language="c#" Inherits="MasterDetail.CustomerOrderDataGrid" EnableViewState="False" %>
<HTML>
<body style="font: x-small Verdana, Arial, sans-serif;">

<form id="CustomerOrderDataGrid" method="post" runat="server">
 <a href="/DayOfDotNet/">Parent Directory</a> 
 <asp:DataGrid id="CustomerDataGrid" runat="server"
 AutoGenerateColumns="False"
 CellPadding="2" CellSpacing="0"
 Font-Names="Verdana, Arial, sans-serif"
 BorderColor="Black" BorderWidth="1"
 GridLines="Horizontal"
 OnItemDataBound="CustomerDataGrid_OnItemDataBound"> <HeaderStyle
 Font-Bold="True" Font-Size="small"
 Font-Name="Arial"
 BackColor="Maroon" ForeColor="White" /> <ItemStyle Font-Size="x-small" /> <AlternatingItemStyle BackColor="Tan" /> <Columns> <asp:HyperLinkColumn
 DataTextField="CustomerID"
 DataNavigateUrlField="CustomerID"
 DataNavigateUrlFormatString="OrderDetailDataGrid.aspx?customerid={0}"
 HeaderText="ID"
 ItemStyle-VerticalAlign="Top" /> <asp:TemplateColumn ItemStyle-VerticalAlign="Top" HeaderText="Customer">
 <ItemTemplate>
 <%# DataBinder.Eval(Container.DataItem, "CompanyName") %> 
 <%# DataBinder.Eval(Container.DataItem, "Address" ) %> 
 <%# DataBinder.Eval(Container.DataItem, "City" ) %>,
 <%# DataBinder.Eval(Container.DataItem, "Region") %>
 <%# DataBinder.Eval(Container.DataItem, "PostalCode" ) %> 
 
 <%# DataBinder.Eval(Container.DataItem, "ContactName" ) %> 
 <%# DataBinder.Eval(Container.DataItem, "ContactTitle" ) %> 
 <%# DataBinder.Eval(Container.DataItem, "Phone" ) %>
 </ItemTemplate>
 </asp:TemplateColumn> <asp:TemplateColumn
 ItemStyle-VerticalAlign="Top"
 HeaderText="Orders"
 ItemStyle-Width="100%"> <ItemTemplate> <asp:DataGrid runat="server"
 AutogenerateColumns="False"
 Width="100%"
 GridLines="Horizontal"
 BorderColor="Black"
 BorderWidth="1"
 Font-Name="Verdana"
 Font-Size="x-small"
 DataSource='<%# getOrdersDataSource( (string)DataBinder.Eval(Container.DataItem, "CustomerID") ) %>'> <HeaderStyle
 BackColor="Black"
 ForeColor="White"
 Font-Bold="True" /> <ItemStyle BackColor="White" /> <AlternatingItemStyle BackColor="Silver" /> <Columns>
 <asp:BoundColumn DataField="OrderID" HeaderText="Order ID" />
 <asp:TemplateColumn>
 <ItemTemplate>
 Order Date: 
 <%# DataBinder.Eval(Container.DataItem, "OrderDate", "{0:D}" ) %>
 
 Shipped Date: 
 <%# DataBinder.Eval(Container.DataItem, "OrderDate", "{0:D}" ) %>
 
 Required Date: 
 <%# DataBinder.Eval(Container.DataItem, "OrderDate", "{0:D}" ) %>
 
 </ItemTemplate>
 </asp:TemplateColumn>
 </Columns>
 </asp:DataGrid>
 </ItemTemplate>
 </asp:TemplateColumn>
 </Columns>
 </asp:DataGrid>

</form>

</body>
</HTML>------------------------------------------------------------------using System;
using System.Data;
using System.Data.SqlClient;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls; namespace MasterDetail
{
 public class CustomerOrderDataGrid : System.Web.UI.Page
 {
 protected DataGrid CustomerDataGrid;
 private DataSet ds = new DataSet();

 private void Page_Load(object sender, System.EventArgs e)
 {
 if(!Page.IsPostBack)
 {
 BindData();
 }
 } private void BindData()
 {
 string sqlStmt = "SELECT * FROM Customers; SELECT * FROM Orders";
 string conString = "server=localhost;database=Northwind;uid=sa;pwd=;";

 SqlDataAdapter sda = new SqlDataAdapter(sqlStmt, conString);

 sda.Fill(ds);
 ds.Tables[0].TableName = "Customers";
 ds.Tables[1].TableName = "Orders";

 CustomerDataGrid.DataSource = ds.Tables["Customers"];
 CustomerDataGrid.DataBind();
 } protected DataView getOrdersDataSource(string _customerID)
 {
 DataView _orders = ds.Tables["Orders"].DefaultView;
 _orders.RowFilter = "CustomerID='" + _customerID + "'";
 return _orders;
 }
 }
}
datalist放一个
在里边在动态ADD一个datalist
演示
http://aspxboy.com/forum