ListView中绑定DropDownList

ListView中绑定DropdownList时候稍微麻烦点：

        protected void ListView1_ItemCreated(object sender, ListViewItemEventArgs e)
        {
            if (e.Item.ItemType == ListViewItemType.DataItem)
            {
                DropDownList ddlGender = (DropDownList)e.Item.FindControl("ddlGender");
                DropDownList ddlUserType = (DropDownList)e.Item.FindControl("ddlUserType");
                DropDownList ddlUserState = (DropDownList)e.Item.FindControl("ddlUserState");

                if (ddlGender != null)
                {
                    ListViewDataItem lvDataItem = (ListViewDataItem)e.Item;
                    BasicInfo info = lvDataItem.DataItem as BasicInfo;
                    if (info != null)
                    {
                       
                        ddlGender.SelectedValue = info.Gender;
                    }
                }

                if (ddlUserType != null)
                {
                    ListViewDataItem lvDataItem = (ListViewDataItem)e.Item;
                    BasicInfo info = lvDataItem.DataItem as BasicInfo;
                    if (info != null)
                    {

                        ddlUserType.SelectedValue = info.UserType;
                    }
                }

                if (ddlUserState != null)
                {
                    ListViewDataItem lvDataItem = (ListViewDataItem)e.Item;
                    BasicInfo info = lvDataItem.DataItem as BasicInfo;
                    if (info != null)
                    {

                        ddlUserState.SelectedValue = info.UserState;
                    }
                }


            }
        }

        protected void ListView1_ItemUpdating(object sender, ListViewUpdateEventArgs e)
        {
            //在更新之前绑定DropDownList
            DropDownList ddGender = (DropDownList)ListView1.Items[e.ItemIndex].FindControl("ddlGender");
            e.NewValues["Gender"] = ddGender.SelectedValue;

            DropDownList ddlUserType = (DropDownList)ListView1.Items[e.ItemIndex].FindControl("ddlUserType");
            e.NewValues["UserType"] = ddlUserType.SelectedValue;

            DropDownList ddlUserState = (DropDownList)ListView1.Items[e.ItemIndex].FindControl("ddlUserState");
            e.NewValues["UserState"] = ddlUserState.SelectedValue;
        }