RequiredFieldValidator无法正常运行 [英] RequiredFieldValidator is not functioning

问题描述

<asp:FileUpload ID="FileUpload1" runat="server" CssClass="style3" />
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator20" runat="server" ControlToValidate="FileUpload1"

                        ErrorMessage="*" ForeColor="#FF6600" ValidationGroup="btnUpload"></asp:RequiredFieldValidator>

推荐答案

确保按钮中的 ValidationGroup =btnUpload

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