复选列表（CheckBoxList）/单选列表（RadioButtonList）

CheckBoxList(复选列表)
1.如何自己添加项
2.布局方式（水平/垂直）（表格/流）（文字和框的位置）
3.读取数据库的内容
4.为数据绑定再追加一个静态项（比如“不选择”静态项目）注意行为里的AppendDataBoundItems属性
5.控件事件
6.读出被选中的

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default4 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
int n = CheckBoxList1.Items.Count;
for (int i = 0; i < n;i++ )
{
if (CheckBoxList1.Items[i].Selected)
{
string txt = CheckBoxList1.Items[i].Text;
string t = txt.Replace("aidd2008","火君道人");
Response.Write(t); //CheckBoxList1的AutoPostBack？
}
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (CheckBoxList1.RepeatDirection == RepeatDirection.Vertical)
{
CheckBoxList1.RepeatDirection = RepeatDirection.Horizontal;
Button1.Text = "给我垂直排列";
}
else
{
CheckBoxList1.RepeatDirection = RepeatDirection.Vertical;
Button1.Text = "给我水平排列";
}
}
protected void CheckBoxList1_DataBound(object sender, EventArgs e)
{
int n = CheckBoxList1.Items.Count;
for (int i = 0; i < n; i++)
{
CheckBoxList1.Items[i].Text = CheckBoxList1.Items[i].Text + i;
}
}
}

<form id="form1" runat="server">
<asp:CheckBoxList ID="CheckBoxList1" runat="server" AppendDataBoundItems="True" AutoPostBack="True"
DataSourceID="SqlDataSource1" DataTextField="senduser" DataValueField="id" OnDataBound="CheckBoxList1_DataBound"
OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged">
<asp:ListItem>不选择</asp:ListItem>
</asp:CheckBoxList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:2000data %>"
SelectCommand="SELECT TOP 5 id, filenames, senduser FROM redheadedfile"></asp:SqlDataSource>
<p />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="排列" />
</form>

<connectionStrings>
<add name="2000data" connectionString="Data Source=.;Initial Catalog=data;Persist Security Info=True;User ID=i05;Password=i05630229" providerName="System.Data.SqlClient" />
</connectionStrings>

RadioButtonList(单选列表)
与CheckBoxList(复选列表)不同的是，单选列表是单选，复选列表是可以复选