if (!Membership.ValidateUser(LoginCheck.UserName, LoginCheck.Password))
            {
                LoginCheck.FindControl("WarmingImage").Visible = true;
                e.Authenticated = false;
            }
            else
            {
                CheckBox CheckUser = (CheckBox)LoginCheck.FindControl("DigitalCertificates");
                if (CheckUser.Checked)
                {
                    X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
                    store.Open(OpenFlags.ReadWrite);
                    X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
                    foreach (X509Certificate2 X509 in collection)
                    {
                        if (X509.Subject == "CN=iOffice")
                        {
                            if (!X509.Verify())
                            {
                                ClientScript.RegisterClientScriptBlock(this.GetType(), "JavaScript", "<script>alert('数据证书无效！')</script>");
                                e.Authenticated = false;
                                break;
                            }
                        }
                    }
                }
                else
                {
                    Session["user"] = LoginCheck.UserName;
                    e.Authenticated = true;
                }
      }
<ClientSideEvents SelectedIndexChanged="function(s, e) {
    ASPxClientUtils.SetCookie(DXGetCurrentThemeCookieName(),s.GetSelectedItem().value);
protected void Page_PreInit(object sender, EventArgs e)
    {
        string themeName = DefaultThemeName;
        if (Page.Request.Cookies[GetThemeCookieName()] != null)
        {
            themeName = HttpUtility.UrlDecode(Page.Request.Cookies[GetThemeCookieName()].Value);
        }
        string clientScriptBlock = "var DXCurrentThemeCookieName = \"" + GetThemeCookieName() + "\";";
        Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "DXCurrentThemeCookieName", clientScriptBlock, true);
        this.Theme = themeName;
}
<!--数据库配置-->
<connectionStrings>
<add name="iOfficeconnectionString" connectionString="server=(local);uid=sa;pwd=;database=iOffice;"/>
</connectionStrings> 
……
<!--错误页面配置-->
            <customErrors mode="On" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
</customErrors> 
……
            <appSettings>
                <!--数据库备份位置-->
                <add key="backupExists" value="../DataBackup/" />
                <!--用户文件存储位置-->
              <add key="currentuserfile" value="../UserFile/" />
              <!--公司文件存储位置-->
                <add key="companyfile" value="../CompanyFile/" />
                <!--职工头像位置-->
                <add key="EmployeePhoto" value="../CompanyFile/EmployeePhoto/" />
              <!--车辆照片存储位置-->
                <add key="CarsPhoto" value="../CompanyFile/CarPhoto/" />
          </appSettings开源oa系统源码>       
……
<!--用户管理-->
<membership defaultProvider="AspNetSqlMembershipProvider" userIsOnlineTimeWindow="10" hashAlgorithmType="">
      <providers>
        <clear />
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="iOfficeconnectionString" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" applicationName="/" requiresUniqueEmail="true" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="1" minRequiredNonalphanumericCharacters="0" password
AttemptWindow="10" passwordStrengthRegularExpression="" />
      </providers>
    </membership>
    <!--用户角管理-->
    <roleManager enabled="true" cacheRolesInCookie="true">
      <providers>
        <clear />
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="iOfficeconnectionString" applicationName="/" />
      </providers>
</roleManager>……
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); //解决中文乱码
Response.AddHeader("Content-Disposition", "attachment; filename=" +
Server.UrlEncode(file.Name)); //解决中文文件名乱码   
        Response.AddHeader("Content-length", file.Length.ToString());
        Response.ContentType = "appliction/octet-stream";
        Response.WriteFile(file.FullName);
Response.End();