Overview of requirements perform the countdown task according to the remaining time obtained. there should be a label dynamic display of remaining time in the form perform operations when there are only 20 seconds left. All the time is over and p...
there are two table-building schemes that I have come up with: first: order_id order id shop_id merchant id goods_id goods id . this way is to write all kinds of id in the order table and associate them when needed. second: order_id order id s...
The A colleague pulled the code locally for development at 7: 00. The B colleague modifies the model layer (the underlying code) at 8: 00 and submits it to the server. A colleague finally finished writing the upper layer code at 9 o clock and submitte...
that s what it is. I hope the bosses can help solve it. Thank you! ...
problem description while learning the c-sharp project, I encountered such a statement FieldInfo field = base.GetType () .GetField (base2.Tag.ToString (), BindingFlags.NonPublic | BindingFlags.Instance); the environmental background of the problems ...
problem description: because the data in Excel needs to be written to the database, Excel helper classes and NPOI references have been added, but before running to this step IWorkbook workbook = WorkbookFactory.Create(stream); excel When , an error i...
I have a dataset with a size of about 100000. The dataset is rarely added or updated, mainly because of frequent query operations, efficient query, and regardless of memory footprint and preload time. Which solution is better to use SQL or JSON+LINQ? ...
I have a dataset with a size of about 100000. The dataset is rarely added or updated, mainly because of frequent query operations, efficient query, and regardless of memory footprint and preload time. Which solution is better to use SQL or JSON+LINQ? ...
I have a dataset with a size of about 100000. The dataset is rarely added or updated, mainly because of frequent query operations, efficient query, and regardless of memory footprint and preload time. Which solution is better to use SQL or JSON+LINQ? ...
problem description as shown in the figure below, the background framework for C-sharp development code, but I have not seen this syntax, excuse me, what does the following ~ Disposable () mean? the environmental background of the problems and wha...
A website is someone else s system, B website is my own system, A website has a link to visit B site, want to click on the link to access B site, copy or manual input can not access B site. After doing it for two days, I don t know how to realize it. I...
public static string Encrypt(string Text, string sKey) { DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider(); byte[] bytes = Encoding.Default.GetBytes(Text); dESCryptoServiceProvider.Key = Encoding.ASCII.GetByte...
the backend uses C-sharp. The data returned to the front end is shown in the figure below. How to convert it to JSON? Should this situation be handled at the back end or at the front end? ...
problem description VUE two-stage linkage drop-down box, when data modification is made, the second drop-down box does not display the value 1. The List of the second drop-down box is determined by the value of the first drop-down box, that is, the ...
collect a website too frequently, fewer and fewer web pages can be collected, and even be blocked. Only by controlling the collection speed and frequency can IP, continuously obtain data, and the browser s cookies should be cleaned regularly. ...
collect a website too frequently, fewer and fewer web pages can be collected, and even be blocked. Only by controlling the collection speed and frequency can IP, continuously obtain data, and the browser s cookies should be cleaned regularly. ...
collect a website too frequently, fewer and fewer web pages can be collected, and even be blocked. Only by controlling the collection speed and frequency can IP, continuously obtain data, and the browser s cookies should be cleaned regularly. ...
The visual studio community 2017 used by has already installed entity framework 6 through visual studio installer. To use ef, in the http: asp.net mvc project, you still need to reinstall it through nuget? ...
for example, we do an extended interface. Let several other third-party applications implement this interface, and then send us a dll. Put it in a directory and you can call the method in this dll dynamically. Do you have any good suggestions? Thanks! ...
I am downloading Meituan takeout data now, but there are three problems. one is that the address of the restaurant always changes. As soon as I got the list of restaurant URLs at the first level, the second level showed that I did not have access to the...
after selecting a time, without clicking OK (click blank or click cancel), the new time values are generated into the pickerValue. How can I just click OK to generate a new time, click blank or cancel or the original time? Thank you! ...
the effect I want: {{1 * 0.00000001}} = 0.00000001 actual running effect: {{1 * 0.00000001}} = 1e-8 1 represents a variable Please advise. ...
the packaged webpack code works fine in the chorme test. But in ie and Firefox will inexplicably appear and chorme behavior. There is a problem when I set an element to opacity:0;transition:all 1s; then a trigger behavior becomes opacity:1;ie and Firefo...
has been installed successfully, but the introduction has been reported as an error saying that it can not be found. It still doesn t work if it s rebooted. Has it ever happened to a great god? ...
Java8 time parsing exception knows a time string indicating the week ordinal of the year, such as 2018-48 , the 48th week of 2018. I want to use this string to get the time of Monday and Sunday of this week . related codes 2018-48 String format...