c# - 在按钮中添加 OnClientClick 时，必填字段验证器不起作用

Question

嗨，我有一个像这样的RequiredFieldValidator

<asp:TextBox ID="txtEmployeeID" runat="server" MaxLength="255" CssClass="txt" 
    OnTextChanged="txtEmployeeID_TextChanged" AutoPostBack="True" 
    ValidationGroup="Save" ></asp:TextBox>     
<asp:RequiredFieldValidator ID="rfvEmployeeID" runat="server" 
    ErrorMessage="Employee ID is required information."
    ControlToValidate="txtEmployeeID" Display="None" ValidationGroup="Save"
    SetFocusOnError="True"></asp:RequiredFieldValidator>

和这样的按钮

 <asp:Button ID="btnBlockUser" runat="server" Text="Block User" 
    CssClass="submitBtn " OnClick="btnBlockUser_Click" 
    OnClientClick="javascript:return confirm('Are you sure want to Block this user ?')"
    ValidationGroup="Save" />

现在的问题是，如果我删除按钮中的 OnClientClick，则 RequriedFieldValidator 可以正常工作，如果我将其放回页面回帖而不显示任何错误消息，有人可以解释为什么会发生这种情况吗？

Answer 1

尝试使用此代码它会帮助你

    <asp:RequiredFieldValidator ID="rfvEmployeeID" runat="server" ErrorMessage="Employee ID is required information."
        ControlToValidate="txtEmployeeID"  ValidationGroup="Save" SetFocusOnError="True"></asp:RequiredFieldValidator>
        <br />
    <asp:Button ID="btnBlockUser" runat="server" Text="Block User" CssClass="submitBtn"  CausesValidation="true"  OnClientClick="return validate();" 
        OnClick="btnBlockUser_Click" ValidationGroup="Save" />
        <script type="text/javascript" language="javascript" >
            function validate() {
                if (Page_ClientValidate())
                return confirm('Are you sure want to Block this user ?');
            }
        </script>