ASP.NET驗證不能在ASP FormView中工作

Question

ASP.NET驗證在ASP中似乎不起作用：FormView。有人能讓我知道我在做什麼錯嗎？謝謝。

這是代碼。

<asp:ValidationSummary ID="ValidationSummary1" runat="server" ValidationGroup="ValidationSummary1" /> 
    <asp:FormView ID="fv_LeaveRequest" runat="server" DataKeyNames="REQ_ACTION_ID"> 
    <InsertItemTemplate> 
      <label>Leave Type</label> 
      <asp:DropDownList ID="ddl_LeaveType" runat="server"> 
      </asp:DropDownList> 
      <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="This field is required" ValidationGroup="ValidationSummary1" Text="Required" ControlToValidate="ddl_LeaveType"></asp:RequiredFieldValidator>   
     <asp:Button ID="LeaveReqBtn" runat="server" Text="Submit Leave Request" CommandName="CustomInsert" 
      CssClass="button-position" ValidationGroup="ValidationSummary1" CausesValidation="true" /> 
    </InsertItemTemplate> 
    <ItemTemplate>    
      <asp:LinkButton ID="Edit" runat="server" Text="Edit/Change Request" CommandName="Edit" CssClass="button-position btn-padding" ValidationGroup="ValidationSummary1" />   
      <label> 
       Leave Type</label> 
      <asp:DropDownList ID="ddl_LeaveType" runat="server"> 
      </asp:DropDownList> 
      <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="This field is required" 
       ValidationGroup="ValidationSummary1" Text="Required" ControlToValidate="ddl_LeaveType"></asp:RequiredFieldValidator> 
       </ItemTemplate> 
    <EditItemTemplate>   
      <asp:LinkButton ID="Cancel" Text="Cancel" CommandName="Cancel" runat="server" CssClass="button-position btn-padding" 
       ValidationGroup="ValidationSummary1" /> 
      <label> 
       Leave Type</label> 
      <asp:DropDownList ID="ddl_LeaveType" runat="server"> 
      </asp:DropDownList> 
      <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="This field is required" 
       ValidationGroup="ValidationSummary1" Text="Required" ControlToValidate="ddl_LeaveType"></asp:RequiredFieldValidator> 
       </EditItemTemplate> 
</asp:FormView> 

Answer 1

您需要爲初始值一個屬性添加到您的RequiredFieldValidators。當您將RequiredFieldValidator與DropDownList一起使用時，您需要添加InitialValue="0"。