代码

Question

以下是我的代码的测试场景。 1）一旦用户选择了Webpage.aspx上的一个单选按钮，就会出现一个模态弹出扩展器。 2）在模态弹出窗口内定义用户控件（SSL_Ticket.ascx）。 3）为用户控件中包含的下拉列表定义RequiredFieldValidator。 4）如果用户从下拉列表中选择“0”值，则不会显示验证错误消息。

代码

Webpage.aspx

                     <asp:RadioButtonList ID="RadioButtonListForTicket" runat="server"  AutoPostBack="true"
                         OnSelectedIndexChanged="radioButtonListForTicket_OnSelectedIndexChanged">
                            <asp:ListItem Selected="True">No</asp:ListItem>
                            <asp:ListItem>Yes</asp:ListItem>
                      </asp:RadioButtonList>
                      <ajaxToolkit:ModalPopupExtender ID="ModalPopupExtenderForTicket" runat="server" BackgroundCssClass="popUpStyle"
                          DropShadow="true" PopupControlID="divTicketPreview" PopupDragHandleControlID="panelDragHandle"
                          TargetControlID="btnForPopupAppear"   CancelControlID="btnForPopupDisappear"/>

....
...

Webpage.aspx.cs

protected void radioButtonListForTicket_OnSelectedIndexChanged(object sender, System.EventArgs e)
{
    if (RadioButtonListForTicket.SelectedItem.Text.ToString().Equals("Yes"))
    {

        // Check if the sites are selected
        updateSelectionCount();
        updateListOfSites();

        if (selectionCount == 0)
        {
            lblSSLTicketSelection.Text = "Please select a site.";
            RadioButtonListForTicket.SelectedValue = "No";
            return;
        }
        else
        {
            lblSSLTicketSelection.Text = "";
        }

        ....

        ModalPopupExtenderForTicket.Show();
    }
}

...

SSL_Ticket.ascx

           <asp:DropDownList ID="cmbRootCause" runat="server" Width="255px" OnSelectedIndexChanged="cmbRootCause_SelectedIndexChanged" AutoPostBack="true"
                CausesValidation="true">
                <asp:ListItem Value="0">Select</asp:ListItem>
                <asp:ListItem Value="1">Item1</asp:ListItem>
           </asp:DropDownList>
           <asp:RequiredFieldValidator ID="reqdFieldForRootCause" runat="server" ControlToValidate="cmbRootCause" InitialValue="Select" 
               ErrorMessage="Please select root cause" ValidationGroup="validateRootCause"  Visible="false" Display="Dynamic" EnableClientScript="true">
           </asp:RequiredFieldValidator>

...

SSL_Ticket.ascx.cs

    protected void cmbRootCause_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (cmbRootCause.SelectedItem.ToString().Equals("Other"))
        {
            lblcmbRootCause.Text = "";
            lblcmbRootCause.Visible = false;
            txtRootCauseOther.Visible = true;
        }
        else if (cmbRootCause.SelectedItem.ToString().Equals("Select"))
        {
            lblcmbRootCause.Visible = true;
            lblcmbRootCause.Text = "Please select root cause";
        }
        else
        {
            lblcmbRootCause.Text = "";
            lblcmbRootCause.Visible = false;
            txtRootCauseOther.Visible = false;
        }
    }

我确实浏览了几个解决方案（ValidateProperty，客户端验证，RangeValidation等），但它没有激活验证文本。

这没有帮助 - Handling RequiredFieldValidator inside of a User Control

我非常感谢你的帮助。

感谢!!!

Answer 1

从必填字段验证程序中删除visible = false属性，默认情况下它们不会显示在开头。

<asp:RequiredFieldValidator ID="reqdFieldForRootCause" runat="server" ControlToValidate="cmbRootCause" InitialValue="Select" 
               ErrorMessage="Please select root cause" ValidationGroup="validateRootCause"  **Visible="false"** Display="Dynamic" EnableClientScript="true">
           </asp:RequiredFieldValidator>

Answer 2

在你的DropDownList的'RequiredFieldValidator'中你需要删除它：

InitialValue="Select"

用户控件内的下拉控件的RequiredFieldValidator不会触发

代码

2 个答案: