如何避免" Response.Redirect的不能在页回调&QUOT被调用; [英] How to avoid "Response.Redirect cannot be called in a Page callback"
问题描述
我清理一些旧的框架code和巨大的量就可以简单地通过异常的编码。没有价值进行检查,看看他们是否为空,其结果是,异常丰富金额抛出和捕获。
我有但大多数人清理,有一些错误/登录/安全相关的框架,正在做Response.Redirect的方法,现在,我们正在使用AJAX,我们得到的的ALOT Response.Redirect的不能被称为一个页面的回调。我想,如果在所有可能避免这一点。
有没有一种方法以编程方式避免这种例外?我正在寻找类似
如果(Request.CanRedirect)
Request.Redirect(URL);
请注意,这也与Server.Transfer的发生,所以我希望能够检查,如果我能做到Request.Redirect或Server.Transfer的。
目前,它简单地做这个
尝试
{
Server.Transfer的(〜/ Error.aspx); //有时的Response.Redirect
}
赶上(例外ABC)
{
//这里处理错误,该错误通常是:
// Response.Redirect的不能在页回调调用
}
您可以尝试
如果(!Page.IsCallback)
Request.Redirect(URL);
或者,如果你没有一个页面方便...
尝试
{
如果(HttpContext.Current == NULL)
返回;
如果(HttpContext.Current.CurrentHandler == NULL)
返回;
如果(!(HttpContext.Current.CurrentHandler是System.Web.UI.Page))
返回;
如果(((System.Web.UI.Page)HttpContext.Current.CurrentHandler).IsCallback)
返回; Server.Transfer的(〜/ Error.aspx);
}
赶上(例外ABC)
{
// 处理它
}
I'm cleaning up some legacy framework code and a huge amount of it is simply coding by exception. No values are checked to see if they are null, and as a result, copious amounts of exceptions are thrown and caught.
I've got most of them cleaned up, however, There are a few error / login / security related framework methods that are doing Response.Redirect and now that we are using ajax, we are getting ALOT of "Response.Redirect cannot be called in a Page callback." And I'd like to avoid this if at all possible.
Is there a way to programatically avoid this exception? I'm looking for something like
if (Request.CanRedirect)
Request.Redirect("url");
Note, this is also happening with Server.Transfer, so I'd like to be able to check if I am able to do Request.Redirect OR Server.Transfer.
Currently, its simply doing this
try
{
Server.Transfer("~/Error.aspx"); // sometimes response.redirect
}
catch (Exception abc)
{
// handle error here, the error is typically:
// Response.Redirect cannot be called in a Page callback
}
You can try
if (!Page.IsCallback)
Request.Redirect("url");
or if you dont have a Page handy...
try
{
if (HttpContext.Current == null)
return;
if (HttpContext.Current.CurrentHandler == null)
return;
if (!(HttpContext.Current.CurrentHandler is System.Web.UI.Page))
return;
if (((System.Web.UI.Page)HttpContext.Current.CurrentHandler).IsCallback)
return;
Server.Transfer("~/Error.aspx");
}
catch (Exception abc)
{
// handle it
}
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