c# - asp :dropdownlist doesn't save users selected value c# asp. 净aspx

Question

几个小时以来，我一直在努力让它发挥作用。我认为问题在于使用枚举，但我的老板坚持要我们使用它。

webapp aspx代码:

                <label for="footerPlaceHolder_twoFactorAuthentication" class="sr-only"><asp:Localize runat="server" Text="<%$ Resources:UserMessages, TwoFactorSelect %>"></asp:Localize></label>
                <asp:DropDownList runat="server" ID="twoFactorAuthenticationDropDownList" CssClass="selectpicker">
                    <asp:ListItem Value="0" Text = "<%$ Resources:UserMessages, TwoFactorSelect %>"></asp:ListItem>
                    <asp:ListItem Value="3" Text = "<%$ Resources:UserMessages, TwoFactorRequire %>" ></asp:ListItem>
                    <asp:ListItem Value="2" Text = "<%$ Resources:UserMessages, TwoFactorRecommend %>" ></asp:ListItem>
                    <asp:ListItem Value="1" Text = "<%$ Resources:UserMessages, TwoFactorNotRequired %>" ></asp:ListItem>
                     </asp:DropDownList>
                <p><asp:RequiredFieldValidator runat="server" ControlToValidate="twoFactorAuthenticationDropDownList" CssClass="field-validation-error"  InitialValue="0" EnableClientScript="true" Display="Dynamic"></asp:RequiredFieldValidator></p>

webapp aspx.cs代码:

var data = Utility.OAWebServiceClient.GetFullSiteData(rowToEdit);

            twoFactorAuthenticationDropDownList.SelectedValue = data.TwoFactorOption.ToString();

网络服务IOAuth2.cs代码:

public enum WebSite2FactorOptionEnum
{
    [EnumMember]
    NotSelected,
    [EnumMember]
    NotRequired,
    [EnumMember]
    Recommended,
    [EnumMember]
    Required
}

Answer 1

问题是下拉列表中的值是 int，但您将 SelectedValue 设置为字符串。

尝试:

twoFactorAuthenticationDropDownList.SelectedValue = ((int)data.TwoFactorOption).ToString();

希望对您有所帮助。