在ASP.NET按钮响应中跳转到其他的页面，会抛出异常’Thread was being aborted’，如下代码
try
{
string redirectUrl = "~/Default.aspx";
Response.Redirect(redirectUrl);
}
catch (System.Exception ex)
{
}
在微软的站点上找到有对应的问题：
ThreadAbortException Occurs If You Use Response.End, Response.Redirect, or Server.Transfer
按照微软的解决方案，只要调用Response.Redirect的重载函数Response.Redirect(String url, bool endResponse)，其中endResponse传入false就可以了
Response.Redirect(redirectUrl,false);
我看了一下ASP.NET的源代码，其中会抛出一个异常，下面是代码：
/// <devdoc> /// <para>Redirects a client to a new URL.</para> /// </devdoc> public void Redirect(String url, bool endResponse) { if (url == null) throw new ArgumentNullException("url"); if (url.IndexOf('\n') >= 0) throw new ArgumentException(SR.GetString(SR.Cannot_redirect_to_newline)); if (_headersWritten) throw new HttpException(SR.GetString(SR.Cannot_redirect_after_headers_sent)); Page page = _context.Handler as Page; if ((page != null) && page.IsCallback) { throw new ApplicationException(SR.GetString(SR.Redirect_not_allowed_in_callback)); } url = ApplyRedirectQueryStringIfRequired(url); url = ApplyAppPathModifier(url); url = ConvertToFullyQualifiedRedirectUrlIfRequired(url); url = UrlEncodeRedirect(url); Clear(); // If it's a Page and SmartNavigation is on, return a short script // to perform the redirect instead of returning a 302 (bugs ASURT 82331/86782) #pragma warning disable 0618 // To avoid SmartNavigation deprecation warning if (page != null && page.IsPostBack && page.SmartNavigation && (Request["__smartNavPostBack"] == "true")) { #pragma warning restore 0618 Write("<BODY><ASP_SMARTNAV_RDIR url=\""); Write(HttpUtility.HtmlEncode(url)); Write("\"></ASP_SMARTNAV_RDIR>"); Write("</BODY>"); } else { this.StatusCode = 302; RedirectLocation = url; Write("<html><head><title>Object moved</title></head><body>\r\n"); Write("<h2>Object moved to <a href=\"" + HttpUtility.HtmlAttributeEncode(url) + "\">here</a>.</h2>\r\n"); Write("</body></html>\r\n"); } _isRequestBeingRedirected = true; if (endResponse) End(); } /* * Cancelles handler processing of the current request * throws special [non-]exception uncatchable by the user code * to tell application to stop module execution. */ /// <devdoc> /// <para>Sends all currently buffered output to the client then closes the /// socket connection.</para> /// </devdoc> public void End() { if (_context.IsInCancellablePeriod) { InternalSecurityPermissions.ControlThread.Assert(); Thread.CurrentThread.Abort(new HttpApplication.CancelModuleException(false)); } else { // when cannot abort execution, flush and supress further output if (!_flushing) { // ignore Reponse.End while flushing (in OnPreSendHeaders) Flush(); _ended = true; if (_context.ApplicationInstance != null) { _context.ApplicationInstance.CompleteRequest(); } } } }
上面的红色代码Thread.CurrentThread.Abort里面就会抛出异常，只要执行还在容许Cancel的时间都会抛异常。
当然什么时候会不容许呢（_context.IsInCancellablePeriod为false），我倒是没看了。