如何在Razor Page中检测回发? [英] How to detect postback in Razor Page?

问题描述

我正在使用一个剃刀页面(cshtml)，该页面具有form和@functions{}部分以捕获OnPost().所有这些都很好.

I'm using a single razor page (cshtml) that has a form and @functions{} section to capture an OnPost(). All of that works fine.

在HTML部分中，我需要知道何时发回邮件并显示一条消息.我不确定在剃刀页面"中在何处或如何完成该操作.我已经尝试过IsPost，但该功能不可用.

In the HTML section, I need to know when a post back has occurred and display a message. I'm not sure where or how that is done in a Razor Page. I've tried IsPost but that isn't available.

我在类中创建了一个字符串属性，并在OnPost中为其设置了一个值，但是一旦进入视图，该属性就是null.

I created a string property in the class and set a value on it in OnPost but once I'm in the view, the property is null.

我在ViewData["mystring"]中分配了一个值，但是一旦进入视图，该值也将为空.

I assigned a value into ViewData["mystring"] but it is also null once I get into the view.

-编辑-
看来问题是我正在尝试在OnPost(即请求)中设置属性.在OnPost之后，OnGet将始终触发. OnGet是响应.我可以在this.Request.Method中看到从POST到GET的翻转.因此，我没有任何迹象表明发生了回发.

-- EDIT --
It seems the issue is that I'm trying to set a property in OnPost, which is the request. After OnPost, OnGet will always fire. OnGet is the Response. I can see the flip from POST to GET in this.Request.Method. So I lose any indication that a postback happened.

有关如何完成操作的任何建议?

Any suggestions on how that is done?

推荐答案

您应该使用use

You should use use Post-Redirect-Get pattern. The message can be stored in TempData

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