Question

asp.net 获取动态绑定的CheckBoxList 的选中项

用数组绑定CheckBoxList 然后点击按钮删除选中项，单步调试发现CheckBoxList1.Items[i].Selected不管是否有选中项都为false，不知道是怎么回事。
protected void Page_Load(object sender, EventArgs e)
{
string[] book = Session["Book"].ToString().Split(',');
this.CheckBoxList1.DataSource = book;
this.CheckBoxList1.DataBind();
}
protected void Button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < CheckBoxList1.Items.Count; i++)
{
if (CheckBoxList1.Items[i].Selected)
{
CheckBoxList1.Items.RemoveAt(i);
}
}
}

Answer 1

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{

string[] book = Session["Book"].ToString().Split(',');
this.CheckBoxList1.DataSource = book;
this.CheckBoxList1.DataBind();
}}
改成