C# 从会话中检索单选按钮列表

正在从会话中检索单选按钮列表选择。我有一个单选按钮列表。我想在返回页面时获得所选内容。radiobutton列表由字符串数组填充

                    if (!IsPostBack)
                    {
                    RadioButtonList1.SelectedIndex = (string)Session["selection"];
                    }

将所选内容添加到会话

                  Session["selection"] = RadioButtonList1.SelectedIndex;

                    if (!IsPostBack)
                    {
                    RadioButtonList1.SelectedIndex = (string)Session["selection"];
                    }

页面加载

                    if (!IsPostBack)
                    {
                    RadioButtonList1.SelectedIndex = (string)Session["selection"];
                    }

不工作不确定为什么来自MSDN:

                    if (!IsPostBack)
                    {
                    RadioButtonList1.SelectedIndex = (string)Session["selection"];
                    }

获取或设置列表中选定项的最低顺序索引 名单

                    if (!IsPostBack)
                    {
                    RadioButtonList1.SelectedIndex = (string)Session["selection"];
                    }

试试这个：

                    if (!IsPostBack)
                    {
                    RadioButtonList1.SelectedIndex = (string)Session["selection"];
                    }

RadioButtonList1.SelectedIndex = Convert.ToInt32(Session["selection"]);