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<asp:FileUpload ID="fuASNFile" runat="server"   Width="480px"/>
                    <asp:CustomValidator ID="cvFileUpload" runat="server" ValidationGroup="Upload" ErrorMessage="Invalid value." ControlToValidate="fuASNFile" ClientValidationFunction="validateFile" Text="*" EnableClientScript="true"></asp:CustomValidator>
                    <asp:CustomValidator ID="cvFileUploadSave" ControlToValidate="fuASNFile" runat="server" ValidationGroup="Save" ClientValidationFunction="validateFileSave" ErrorMessage="Invalid File." Text="*" EnableClientScript="true"></asp:CustomValidator>

这两个验证控件中只有一个有效,但不能同时工作。

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