C# 在读取设置时保存设置
我有一种将设置保存到文件的方法。如果 dateTimePicker 的值发生更改，则调用此方法。但我在 Form_Load 加载设置 ->我从文件中读取值并将其分配给 dateTimePicker，但是此调用方法 save_settings （原因值已更改）。此时出现问题，因为文件是由程序打开的 ->读取值和程序想要写入文件更改... 我怎样才能做到这一点？
I have a method which save settings to file. This method is called if value of dateTimePicker changed. But I have in Form_Load loading settings -> I read value from file and assign it with dateTimePicker, but this call method save_settings (couse value changed). And in this moment is problem couse the file is open by program -> reading values and program wanna write to file changes...
How can I do that?
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我认为你有关键部分。有很多方法可以解决这个问题。一种方法是在文件保存周围放置 Lock 语句。这样，一个线程应该在另一个线程完成后等待。但根据理解你的问题，我认为问题出在你的设计上。据我了解，您试图同时阅读和写作。也许你应该声明全局 bool 变量 isToSave 。这将指示您何时可以保存。使用文件时不要忘记使用 using 语句来释放文件
处理。
I think that you have critical section. There are plenty ways to deal with this issue . One way is to put Lock statement around file saving . This way one thread should wait after another thread is finished. But from understanding your question I think that problem is with your desing . As I understand you trying to read and write simultaneously . Maybe you should declare global bool variable isToSave . That will indicate when you can save . When working with file do not forget to use using statement to release file
Handle.
使用某种标志 - 在开始读取配置时设置它并在
finally块中取消设置。设置该标志后，忽略对ValueChanged的调用。由于您正在OnLoad中加载配置，因此 dateTimePicker 的值发生变化不会有其他原因，因为您处于主 UI 线程中并且消息泵目前未泵送。Use some kind of flag - set it when you start reading your config and unset it in
finallyblock. When the flag is set, ignore calls toValueChanged. Since you are loading config inOnLoad, there will be no other reasons for dateTimePicker's value change because you're in main UI thread and message pump is not pumping at the moment.