Sys.Webforms. PageRequestManag erServerErrorExc eption: An uknown error occurred while processing the request on the server. Th

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asp.net2.0 + vb.net + Ajax，点击按钮,出现一个痛苦的问题：

Sys.Webforms. PageRequestManag erServerErrorExc eption: An uknown error occurred while processing the request on the server. The status code returned from the server was: 500

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="conditional">
                <ContentTemplate>
                    <asp:Table ID="Table1" runat="server" CellPadding="2" CellSpacing="0" CssClass="table">
                        <asp:TableRow>
                            <asp:TableCell CssClass="tableCell" Width="8%">
                        标题
                            </asp:TableCell>
                            <asp:TableCell CssClass="tableCell">
                                <asp:Label ID="lblSubject" runat="server" Text=""></asp:Label>
                            </asp:TableCell>
                        </asp:TableRow>
                        <asp:TableRow>
                            <asp:TableCell CssClass="tableCell" VerticalAlign="top">
                        内容
                            </asp:TableCell>
                            <asp:TableCell CssClass="tableCell">
                                <FCKeditorV2:FCKeditor ID="FCKeditor1" runat="server" BasePath="~/Editor/Back/FCKeditor/" Height="300">
                                </FCKeditorV2:FCKeditor>
                            </asp:TableCell>
                        </asp:TableRow>
                    </asp:Table>
                      <asp:Button ID="btnAdd" runat="server" OnClick="btnAdd_Click"
                        CssClass="button" />  <asp:Button ID="btnFinish" runat="server" Text="完成" OnClick="btnFinish_Click" CssClass="button" CausesValidation="false" />
                </ContentTemplate>
            </asp:UpdatePanel>

解决问题的方法，在：

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="xxx.aspx.vb" Inherits="xxx" %>里加上一个属性：ValidateRequest="false" 即可。