Excel is a powerful spreadsheet application running in Windows environment. An Excel spreadsheet is called a workbook, and a workbook is saved in a file with the extension. xlsx. Each workbook can contain multiple tables (worksheets) the table currently viewed by the user (or the last table viewed before closing) is called the active table. ...
Added by saadatshah on Tue, 19 May 2020 10:10:42 +0300
Click the button to implement asynchronously to realize the non blocking state of the interface.The asynchronous development mode recommended in C ා uses async to prompt for possible asynchronous operations, and await keyword to wait for tasks to wait for asynchronous operations.For the methods with Async suffix provided in. net library, await ...
Added by shooff2332 on Tue, 12 May 2020 17:36:54 +0300
Serial communication using Python requires the pyserial Library of python, which is not automatically installed when Python is installed and needs to be installed by itself.
1. Install pyserial library:
Open the command line window and type: pip install pyserial command on the command line to install.
2. The program uses tkinter, a GUI lib ...
Added by lookee on Tue, 12 May 2020 05:24:47 +0300
According to the real business requirements of a power grid company, this case realizes the difference aggregation calculation on the real-time flow through Blink SQL+UDAF. Through this case, the readers are familiar with UDAF writing and understand the method invocation relationship and order in UDAF. Thank you @ commander for your guidance in ...
Added by stalione on Fri, 08 May 2020 12:15:27 +0300
Open the source code directly, see that it is a file upload, check the file size and pass a Check() function judgment, and take a look at the Check() function
$BlackExts = array("php");
$ext = explode(".", $_FILES["file"]["name"]);
$exts = trim(end($ext));
$file_content = file_get_contents($_FILES["file"]["tmp ...
Added by mrjameer on Thu, 07 May 2020 10:23:40 +0300
This is a summary of the C ා Foundation Series. Now we use the knowledge we learned before to make a small tool for us to use.
If you have read the IO article, you should have an impression. At that time, I mentioned a scenario description. When we use the system, we often worry about finding the location of a file. Now let's try to ...
Added by bampot on Thu, 07 May 2020 08:46:29 +0300
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When I was a child, I always had 100000 questions about why. Today, I take you to climb a quest ...
Added by javamint on Wed, 06 May 2020 10:44:25 +0300
Modifying and listening IP address of oracle
Reference and combine these two blogs Modifying and listening IP address of oracle Oracle modify listening IP address
In a very simple way, the problem of monitoring is solved.
Now let's combine and rearrange it
1. In cmd, enter hostname discovery hostname
2. Modify the ...
Added by ubunken on Tue, 05 May 2020 23:03:59 +0300
1. Verify password strength: the strength of password must include the combination of upper and lower case letters and numbers. Special characters cannot be used, and the length is between 8 and 10
2. Check Chinese: the string can only be Chinese
Added by sols on Mon, 04 May 2020 03:23:55 +0300
Now, netcore 3.1 and the latest. Netframework 8 have not been criticized as the ArrayList, but it's a coincidence that this thing has to be said, because it determines that the C ා team changes its ways, abandons the past and starts again, and the last ArrayList case code.
public class ArrayList
private object items; privat ...
Added by arjuna on Sat, 02 May 2020 20:10:09 +0300