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我在我的 registeruser 代码中添加了一个下拉列表，以便我可以从我们的数据库中随机加载安全问题。

这是该代码；

<asp:CreateUserWizard ID="RegisterUser" runat="server" EnableViewState="false"
                      CancelDestinationPageUrl="RegistrationFailed.aspx" DisableCreatedUser="true"
                      ContinueDestinationPageUrl="Login.aspx" LoginCreatedUser="false">
    <LayoutTemplate>
        <asp:PlaceHolder ID="wizardStepPlaceholder" runat="server"></asp:PlaceHolder>
        <asp:PlaceHolder ID="navigationPlaceholder" runat="server"></asp:PlaceHolder>
    </LayoutTemplate>
    <WizardSteps>
        <asp:CreateUserWizardStep ID="RegisterUserWizardStep" runat="server">
            <ContentTemplate>
                <span class="failureNotification">
                    <asp:Literal ID="ErrorMessage" runat="server"></asp:Literal>
                </span>
                <asp:ValidationSummary ID="RegisterUserValidationSummary" runat="server" CssClass="failureNotification" 
                     ValidationGroup="RegisterUserValidationGroup"/>
                <div class="accountInfo">
                    <fieldset class="register">
                        <legend>Account Information</legend>
                        'All other fields removed for brevity
                        <p>
                            <asp:Label ID="QuestionLabel" runat="server" AssociatedControlID="Question">Select Security Question:</asp:Label>
                            <asp:DropDownList ID="Question" runat="server">
                            </asp:DropDownList><br />
                            <i style="font-size: .7em;">If you forget your password you will be asked the security question you choose here and prompted to enter the answer you specify below.</i>
                            <asp:RequiredFieldValidator ID="rfvSecurityQuestion" runat="server" ControlToValidate="Question" 
                                 CssClass="failureNotification" ErrorMessage="&laquo; [Required]" ToolTip="A security question is required." 
                                 ValidationGroup="RegisterUserValidationGroup">*</asp:RequiredFieldValidator>     
                        </p>
                         <p>
                            <asp:Label ID="Answerlabel" runat="server" AssociatedControlID="Answer">Security Answer:</asp:Label>
                            <asp:TextBox ID="Answer" runat="server" CssClass="textEntry"></asp:TextBox>
                            <asp:RequiredFieldValidator ID="AnswerRequired" runat="server" ControlToValidate="Answer" 
                                 CssClass="failureNotification" ErrorMessage="&laquo; [Required]" ToolTip="Security answer is required." 
                                 ValidationGroup="RegisterUserValidationGroup">*</asp:RequiredFieldValidator>
                        </p>
                    </fieldset>
                    <p class="submitButton">
                        <asp:Button ID="CreateUserButton" runat="server" CommandName="MoveNext" Text="Create User" 
                             ValidationGroup="RegisterUserValidationGroup" CssClass="buttons" />
                    </p>
                </div>
            </ContentTemplate>
            <CustomNavigationTemplate>
            </CustomNavigationTemplate>
        </asp:CreateUserWizardStep>
    </WizardSteps>
</asp:CreateUserWizard>

我正在尝试在后面的代码中将项目添加到该下拉列表中。智能感知没有看到任何带有问题 ID 的控件，但找到了 RegisterUser.Question，但我无法向其中添加列表项。

 Protected Sub Page_PreLoad(sender As Object, e As EventArgs) Handles Me.PreLoad

        Dim ddl As DropDownList = TryCast(FindControl(RegisterUser.Question), DropDownList)
        'If ddl Is Nothing Then MsgBox("nothing") ' for testing if ddl is found
        'Dim itemlist As New List(Of String)
        'itemlist = GetSecurityQuestionsforDDL()
        'For Each item As String In itemlist
        ddl.Items.Add(New ListItem("did this get added?"))
        'Next

End Sub

页面加载，但下拉列表中没有问题。如何找到下拉控件以向其中添加列表项？

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1 回答 1

0

我不喜欢这个，因为它看起来很乱。以下是C#。您可以轻松地重写为 VB。我做了一个测试，成功找到了下拉列表。

DropDownList oDDL =
    (DropDownList)RegisterUser.FindControl("CreateUserStepContainer$Question");

从这里获得基本代码： http ://romsteady.blogspot.com/2007/08/howto-find-controls-in-wizard.html

于 2012-12-24T15:59:59.423 回答