为什么在EWL中单击Enter时没有提交按钮，却出现并发错误？
[英]Why do I get a concurrency error when hitting Enter without a submit button in EWL?
问题描述
I have a page with some form items and an EwfLink (not a submit button). 
我有一个包含一些表单项和EwfLink的页面（不是提交按钮）。 If I post back by hitting enter on any of the form fields, I get a concurrency error (even if I didn't change anything). 如果我通过在任何表单字段上按Enter回发，则会收到并发错误（即使我没有进行任何更改）。 If I don't do that, the page otherwise works. 如果我不这样做，则该页面可以正常工作。 What's going on? 这是怎么回事？
1 个解决方案
解决方案1
1 已采纳 2014-04-02 12:24:52
In HTML, some form controls will post the form when Enter is pressed even if there is no submit button. 在HTML中，即使没有提交按钮，某些窗体控件也会在按下Enter键时发布该窗体。 See http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#implicit-submission . 请参阅http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#implicit-submission 。 You got a concurrency error because, since there was no submit button, EWF was not expecting an implicit-submission post-back to occur. 您收到并发错误的原因是，由于没有提交按钮，因此EWF并不希望发生隐式提交回发。
I recently improved EWF's support for this situation; 我最近改善了EWF对这种情况的支持； see https://enduracode.kilnhg.com/Code/Ewl/Group/Bill/History/a91e41468f96 . 参见https://enduracode.kilnhg.com/Code/Ewl/Group/Bill/History/a91e41468f96 。 EWF now throws a helpful exception if you try to build a page that includes implicit-submission form controls but no submit button. 现在，如果您尝试构建一个包含隐式提交表单控件但没有提交按钮的页面，则EWF会抛出一个有用的异常。
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