Question

在datalist中使用必填字段验证器时出现问题

我们有4个民意调查。在那个用户必须回答两个必要的民意调查。

我已经在我的datalist中添加了所有四个民意调查，它显示正常，并且在单击提交按钮时，所需的字段验证器正在工作并提供错误消息。一旦我们回答了所需的民意调查并再次点击提交按钮，所有其他不需要的民意调查显示为必需的民意调查。

我的民意调查答案提交不是问题，我想避免显示非必需民意调查的错误消息。

请帮我解决这个问题

这是我的设计和代码：



       <div id="pollQuestion_div" Class="read-messages-poll" runat="server" >

       <asp:DataList ID="PollDataList" runat="server" onitemdatabound="PollDataList_ItemDataBound">

              <ItemTemplate>

                 <asp:HiddenField ID="PollIDReqHiddenField" Value='<%# Eval("PollID") %>' runat="server" Visible="false" />

                 <asp:Label ID="lblReqQuestionNumber" runat="server" Text='<%# Eval("No of PollQuestion") %>' Font-Bold="true"></asp:Label><br />
                <asp:Label ID="lblRequiredPollQusetion" runat="server" Text='<%# Eval("PollQuestions") %>' Font-Bold="true"></asp:Label>
                <asp:RequiredFieldValidator ID="RequiredFieldValidatorReqPoll" runat="server" ControlToValidate="rdblstRequiredPollOptions"  Display="Dynamic" ErrorMessage="*" ForeColor="Red" ></asp:RequiredFieldValidator>

                <asp:HiddenField ID="HiddenFieldPollOption" runat="server" Value='<%# Eval("PollOptions") %>' Visible="false" />
                <asp:HiddenField ID="HiddenFieldPollType" runat="server" Value='<%# Eval("PollType") %>' Visible="false"/>

                <asp:RadioButtonList ID="rdblstRequiredPollOptions" runat="server" > </asp:RadioButtonList>
                <asp:RadioButtonList ID="rdblstNonRequiredPollOptions" runat="server" > </asp:RadioButtonList>

                <asp:CheckBoxList ID="CheckBoxListMultiple" runat="server" RepeatDirection="Vertical"></asp:CheckBoxList>                

              </ItemTemplate>

              <FooterTemplate> 
                <asp:Button ID="btnSubmitPoll" runat="server" Text="Submit" CssClass="custom-button" OnClick="btnSubmitPoll_click" />   
              </FooterTemplate>

      </asp:DataList>   
    </div>


Datalist Item bound Code:

       <div id="pollQuestion_div" Class="read-messages-poll" runat="server" >

       <asp:DataList ID="PollDataList" runat="server" onitemdatabound="PollDataList_ItemDataBound">

              <ItemTemplate>

                 <asp:HiddenField ID="PollIDReqHiddenField" Value='<%# Eval("PollID") %>' runat="server" Visible="false" />

                 <asp:Label ID="lblReqQuestionNumber" runat="server" Text='<%# Eval("No of PollQuestion") %>' Font-Bold="true"></asp:Label><br />
                <asp:Label ID="lblRequiredPollQusetion" runat="server" Text='<%# Eval("PollQuestions") %>' Font-Bold="true"></asp:Label>
                <asp:RequiredFieldValidator ID="RequiredFieldValidatorReqPoll" runat="server" ControlToValidate="rdblstRequiredPollOptions"  Display="Dynamic" ErrorMessage="*" ForeColor="Red" ></asp:RequiredFieldValidator>

                <asp:HiddenField ID="HiddenFieldPollOption" runat="server" Value='<%# Eval("PollOptions") %>' Visible="false" />
                <asp:HiddenField ID="HiddenFieldPollType" runat="server" Value='<%# Eval("PollType") %>' Visible="false"/>

                <asp:RadioButtonList ID="rdblstRequiredPollOptions" runat="server" > </asp:RadioButtonList>
                <asp:RadioButtonList ID="rdblstNonRequiredPollOptions" runat="server" > </asp:RadioButtonList>

                <asp:CheckBoxList ID="CheckBoxListMultiple" runat="server" RepeatDirection="Vertical"></asp:CheckBoxList>                

              </ItemTemplate>

              <FooterTemplate> 
                <asp:Button ID="btnSubmitPoll" runat="server" Text="Submit" CssClass="custom-button" OnClick="btnSubmitPoll_click" />   
              </FooterTemplate>

      </asp:DataList>   
    </div>

Answer 1

在PollDataList_ItemDataBound中，您对项目进行迭代，并使用条件设置验证器的Enabled属性

//禁用验证器

var validator = (RequiredFieldValidator )e.Item.FindControl("RequiredFieldValidatorReqPoll");
validator.Enabled=false;

//启用

var validator = (RequiredFieldValidator )e.Item.FindControl("RequiredFieldValidatorReqPoll");
validator.Enabled=true;

RequiredFieldsValidator在datalist中不起作用

1 个答案: